UNITED STATES
SECURITIES AND EXCHANGE COMMISSION

Washington, D.C. 20549

FORM 10–K

(mark one)

X		ANNUAL REPORT PURSUANT TO SECTION 13 OR 15(d) OF THE SECURITIES EXCHANGE ACT OF 1934

OR

		TRANSITION REPORT PURSUANT TO SECTION 13 or 15(d) OF THE SECURITIES EXCHANGE ACT OF 1934

Commission file number 001-14423

PLEXUS CORP.

(Exact Name of Registrant as Specified in its Charter)

Wisconsin		39-1344447
(State or other jurisdiction of		(I.R.S. Employer Identification No.)
incorporation or organization)

(Address, including zip code, of principal executive offices and Registrant’s telephone number, including area code)

          Securities registered pursuant to Section 12(b) of the Act:

Title of Each Class		Name of Each Exchange on Which Registered
Common Stock, $.01 par value		The NASDAQ Global Select Market
Preferred Share Purchase Rights		The NASDAQ Global Select Market

          Securities registered pursuant to Section 12(g) of the Act:       None

          Indicate by check mark if the registrant is a well-known seasoned issuer, as defined in Rule 405 of the Securities Act. Yes  ü  No   

          Indicate by check mark if the registrant is not required to file reports pursuant to Section 13 or 15(d) of the Act. Yes    No  ü 

          Indicate by check mark whether the registrant (1) has filed all reports required to be filed by Section 13 or 15(d) of the Securities Exchange Act of 1934 during the preceding 12 months (or for such shorter period that the registrant was required to file such reports), and (2) has been subject to such filing requirements for the past 90 days.
Yes  ü  No   

          Indicate by check mark whether the registrant has submitted electronically and posted on its corporate Web site, if any, every Interactive Data File required to be submitted and posted pursuant to Rule 405 of Regulation S-T (§232.405 of this chapter) during the preceding 12 months (or for such shorter period that the registrant was required to submit and post such files). Yes  ü  No   

          Indicate by check mark if disclosure of delinquent filers pursuant to Item 405 of Regulation S-K (§229.405 of this chapter) is not contained herein, and will not be contained, to the best of the registrant’s knowledge, in definitive proxy or information statements incorporated by reference in Part III of this Form 10-K or any amendment to this
Form 10-K. [ ü ]

          Indicate by check mark whether the registrant is a large accelerated filer, an accelerated filer, a non-accelerated filer, or a smaller reporting company. See the definitions of “large accelerated filer,” “accelerated filer” and “smaller reporting company” in Rule 12b-2 of the Exchange Act.

		Large accelerated filer  ü		Accelerated filer
		Non-accelerated filer		Smaller reporting company
		(Do not check if a smaller reporting company)

          Indicate by check mark whether the registrant is a shell company (as defined in Rule 12b-2 of the Act). Yes ___ No  ü 

          As of April 3, 2010, 40,124,064 shares of common stock were outstanding, and the aggregate market value of the shares of common stock (based upon the $36.95 closing sale price on that date, as reported on the NASDAQ Global Select Market) held by non-affiliates (excludes 290,908 shares reported as beneficially owned by directors and executive officers – does not constitute an admission as to affiliate status) was approximately $1,471.8 million.

          As of November 12, 2010, there were 40,477,914 shares of common stock outstanding.

DOCUMENTS INCORPORATED BY REFERENCE

Document		Part of Form 10-K Into Which Portions of Document are Incorporated
Proxy Statement for 2011 Annual Meeting of Shareholders		Part III

“SAFE HARBOR” CAUTIONARY STATEMENT UNDER THE PRIVATE SECURITIES LITIGATION REFORM ACT OF 1995:

          The statements contained in this Form 10-K that provide guidance or are not historical facts (such as statements in the future tense and statements including “believe,” “expect,” “intend,” “plan,” “anticipate,” “goal,” “target” and similar terms and concepts), including all discussions of periods which are not yet completed, are forward-looking statements that involve risks and uncertainties, including, but not limited to:

	•		the economic performance of the industries, sectors and customers we serve
	•		the risk of customer delays, changes, cancellations or forecast inaccuracies in both ongoing and new programs
	•		the poor visibility of future orders, particularly in view of current economic conditions
	•		the effects of the volume of revenue from certain sectors or programs on our margins in particular periods
	•		our ability to secure new customers, maintain our current customer base and deliver product on a timely basis
	•		the risk that our revenue and/or profits associated with customers who are acquired by third parties will be negatively affected
	•		the risks relative to new customers, including our arrangements with The Coca-Cola Company, which risks include customer delays, start-up costs, potential inability to execute, the establishment of appropriate terms of agreements and the lack of a track record of order volume and timing
	•		the risks of concentration of work for certain customers
	•		our ability to manage successfully a complex business model characterized by high customer and product mix, low volumes and demanding quality, regulatory and other requirements
	•		the risk that new program wins and/or customer demand may not result in the expected revenue or profitability
	•		the fact that customer orders may not lead to long-term relationships
	•		the effects of the current constrained supply environment, which has led and may continue to lead to periods of shortages and delays in obtaining components based on the lack of capacity at some of our suppliers to meet increased demand, or which may cause customers to increase forecasts and orders to secure raw material supply
	•		raw material and component cost fluctuations particularly due to sudden increases in customer demand
	•		the risks associated with excess and obsolete inventory, including the risk that inventory purchased on behalf of our customers may not be consumed or otherwise paid for by customers, resulting in an inventory write-off
	•		the weakness of the global economy and the continuing instability of the global financial markets and banking system, including the potential inability of our customers or suppliers to access credit facilities
	•		the effect of changes in the pricing and margins of products
	•		the effect of start-up costs of new programs and facilities, including our recent and planned expansions, such as our new replacement facility in Oradea, Romania, and our plans to further expand in Penang, Malaysia and other locations
	•		the risks associated with having significant operations and planned growth in countries outside the United States, including the effects of international political developments, economic or political instability, or foreign exchange rate fluctuations
	•		the adequacy of restructuring and similar charges as compared to actual expenses
	•		the risk of unanticipated costs, unpaid duties and penalties related to an ongoing audit of our import compliance by U.S. Customs and Border Protection
	•		possible unexpected costs and operating disruption in transitioning programs
	•		the potential effect of world or local events or other events outside our control (such as drug cartel-related violence in Mexico, changes in oil prices, terrorism and war in the Middle East)
	•		the impact of increased competition and other risks detailed below in “Risk Factors”, otherwise herein, and in our Securities and Exchange Commission filings.

          In addition, see Risk Factors in Part I, Item 1A and Management’s Discussion and Analysis of Financial Condition and Results of Operations in Part II, Item 7 for a further discussion of some of the factors that could affect future results.

*   *   *

PART I

ITEM 1.		BUSINESS

Overview

          Plexus Corp. and its subsidiaries (together “Plexus,” the “Company,” or “we”) participate in the Electronic Manufacturing Services (“EMS”) industry. We deliver optimized Product Realization solutions through a unique Product Realization Value Stream service model. This customer focused service model seamlessly integrates innovative product design, customized supply chain solutions, uniquely configured “focused factory” manufacturing, global end-market fulfillment and after-market services to deliver comprehensive end-to-end solutions for customers. We provide these services to original equipment manufacturers (“OEMs”) and other technology companies in the wireline/networking, wireless infrastructure, medical, industrial/commercial and defense/security/aerospace market sectors. We provide advanced product design, manufacturing and testing services to our customers with a focus on the mid-to-lower-volume, higher complexity segment of the EMS market. Our customers’ products typically require exceptional production and supply-chain flexibility, necessitating an optimized demand-pull-based manufacturing and supply chain solution across an integrated global platform. Many of our customers’ products require complex configuration management and direct order fulfillment to their customers across the globe. In such cases we provide global logistics management and after-market service and repair. Our customers’ products may have stringent requirements for quality, reliability and regulatory compliance. We offer our customers the ability to outsource all phases of product realization, including product specifications; development, design and design verification; regulatory compliance support; prototyping and new product introduction; manufacturing test equipment development; materials sourcing, procurement and supply-chain management; product assembly/manufacturing, configuration and test; order fulfillment, logistics and service/repair.

          Plexus is passionate about its goal to be the best EMS company in the world at providing services for customers that have mid-to-lower-volume requirements and a higher complexity of products. We have tailored our engineering services, manufacturing operations, supply-chain management, workforce, business intelligence systems, financial goals and metrics specifically to support these types of programs. Our flexible manufacturing facilities and processes are designed to accommodate customers with multiple product-lines and configurations as well as unique quality and regulatory requirements. Each of these customers is supported by a multi-disciplinary customer team and one or more uniquely configured “focus factories” supported by a supply-chain and logistics solution specifically designed to meet the flexibility and responsiveness required to support that customer’s fulfillment requirements.

          Our go-to-market strategy is also tailored to our target market sectors and business strategy. We have business development and customer management teams that are dedicated to each of the five sectors we serve. These teams are accountable for understanding the sector participants, technology, unique quality and regulatory requirements and longer-term trends in these sectors. Further, these teams help set our strategy for growth in these sectors with a particular focus on expanding the services and value-add that we provide to our current customers while strategically targeting select new customers to add to our portfolio.

          Our financial model is aligned with our business strategy, with our primary focus to earn a return on invested capital (“ROIC”) in excess of our weighted average cost of capital (“WACC”). The smaller volumes, flexibility requirements and fulfillment needs of our customers typically result in greater investments in inventory than many of our competitors, particularly those that provide EMS services for high-volume, less complex products with less stringent requirements (such as consumer electronics). In addition, our cost structure relative to these peers includes higher investments in selling and administrative costs as a percentage of sales to support our sector-based go-to-market strategy, smaller program sizes, flexibility, and complex quality and regulatory compliance requirements. By exercising discipline to generate a ROIC in excess of our WACC, our goal is to ensure that Plexus creates a value proposition for our shareholders as well as our customers.

          Our customers include both industry-leading OEMs and other technology companies that have never manufactured products internally. As a result of our focus on serving market sectors that rely on advanced electronics technology, our business is influenced by technological trends such as the level and rate of development of telecommunications infrastructure, the expansion of networks and use of the Internet. In addition, the federal Food and Drug Administration’s approval of new medical devices, defense procurement practices and other governmental approval and regulatory processes can affect our business. Our business has also benefited from the trend to increased outsourcing by OEMs.

          We provide most of our contract manufacturing services on a turnkey basis, which means that we procure some or all of the materials required for product assembly. We provide some services on a consignment basis, which means that the customer supplies the necessary materials, and we provide the labor and other services required for product assembly. Turnkey services require material procurement and warehousing, in addition to manufacturing, and involve greater resource investments than consignment services. Other than certain test equipment and software used for internal operations, we do not design or manufacture our own proprietary products.

          Established in 1979 as a Wisconsin corporation, we have approximately 8,700 full-time employees, including approximately 1,600 engineers and technologists dedicated to product development and design, test equipment development and design, and manufacturing process development and control, all of whom operate from 22 active facilities in 15 locations, totaling approximately 2.8 million square feet.

          We maintain a website at www.plexus.com. We make available through that website, free of charge, copies of our Annual Reports on Form 10-K, Quarterly Reports on Form 10-Q, Reports on Form 8-K, and amendments to those reports, as soon as reasonably practical after we electronically file those materials with, or furnish them to, the Securities and Exchange Commission (“SEC”). Our Code of Conduct and Business Ethics is also posted on our website. You may access these SEC reports and the Code of Conduct and Business Ethics by following the links under “Investor Relations” at our website.

Services

          Plexus offers a broad range of integrated services as more fully described below; our customers may utilize any, or all, of the following services and tend to use more of these services as their outsourcing strategies mature:

          Product development and design. We provide comprehensive conceptual design and value-engineering services. These product design services include project management, feasibility studies, product conceptualization, specification development for product features and functionality, circuit design (including digital, microprocessor, power, analog, radio frequency (RF), optical and micro-electronics), field programmable gate array design (FPGA), printed circuit board layout, embedded software design, mechanical design (including thermal analysis, fluidics, robotics, plastic components, sheet metal enclosures, and castings), development of test specifications and product verification testing. We invest in the latest design automation tools and technology. We also provide comprehensive value-engineering services for our customers that extend the life cycles of their products. These value-added services include engineering change-order management, cost reduction redesign, component obsolescence management, product feature expansion, test enhancement and component re-sourcing.

          Prototyping and new product introduction services. We provide assembly of prototype products within our operating sites. We supplement our prototype assembly services with other value-added services, including materials management, analysis of the manufacturability and testability of a design, test implementation and pilot production runs leading to volume production. These services link our engineering and our customers’ engineering to our volume manufacturing facilities. These links facilitate an efficient transition from engineering to manufacturing. We believe that these services provide significant value to our customers by accelerating their products’ time-to-market schedule, reducing change activity and providing a robust product set.

          Test equipment development. Enhanced product functionality has led to increasingly complex components and assembly techniques; consequently, there is a need to design and assemble increasingly complex in-circuit and functional test equipment for electronic products and assemblies. Our internal development of this test equipment allows us to rapidly specify, implement, maintain and enhance test solutions that efficiently test printed circuit assemblies, subassemblies, system assemblies and finished products. We also develop specialized equipment that allows us to environmentally stress-test products during functional testing to assure reliability. We believe that the internal design and production of test equipment is an important factor in our ability to provide technology-driven products of consistently high quality.

          Material sourcing and procurement. We provide contract manufacturing services on either a “turnkey” basis, which means we source and procure the materials required for product assembly, or on a “consignment” basis, which means the customer supplies the materials necessary for product assembly. Turnkey services include materials procurement and warehousing in addition to manufacturing and involve greater resource investment and potential inventory risk than consignment services. Substantially all of our manufacturing services are currently on a turnkey basis.

          Agile manufacturing services. We have the manufacturing services expertise required to assemble very complex electronic products that utilize multiple printed circuit boards and subassemblies. These manufacturing services, which we endeavor to provide on an agile and rapid basis, are typically configured to fulfill unique end-customer requirements and many are shipped directly to our customers’ end users. We provide a range of higher level assembly services to our customers; these products typically fall into one of the following categories in our assembly spectrum:

	•		Printed circuit board assembly – a printed circuit board (“PCB”) populated with electronic components.
	•		Basic assembly – a sub-assembly that includes PCBs and other components.
	•		System integration – a finished product or sub-system assembly that includes more complex components such as PCB’s, basic assemblies, custom engineered components, displays, optics, metering and measurement or thermal management.
	•		Mechatronic integration – more complex system integration that combines electronic controls with mechanical systems and processes such as motion control, robotics, drive systems, fluidics, hydraulics or pneumatics.

          System integration and mechatronic integration products can be very large and could include products such as kiosks, finished medical products and complex electro-mechanical assemblies. These products often combine many of the other integrated services we provide and may require more unique facility configurations as well as supply chain solutions than we typically employ.

          Fulfillment and logistic services. We provide fulfillment and logistic services to many of our customers. Direct Order Fulfillment (“DOF”) entails receiving orders from our customers that provide the final specifications required by the end-customer. We then Build to Order (“BTO”) and Configure to Order (“CTO”) and deliver the product directly to the end-customer. The DOF process relies on Enterprise Resource Planning (“ERP”) systems integrated with those of our customers to manage the overall supply chain from parts procurement through manufacturing and logistics.

          After-market support. We provide service support for manufactured products requiring repair and/or upgrades, which may or may not be under a customer’s warranty. In support of certain customers, we provide these services for some products which we did not originally manufacture. We provide in and out bound logistics required to support fulfillment and service.

          Regulatory requirements. In addition, we have developed certain processes and tools to meet industry-specific requirements. Among these are the tools and processes to assemble finished medical devices that meet U.S. Food and Drug Administration Quality Systems Regulation requirements and similar regulatory requirements in other countries.

          Our manufacturing and engineering facilities are ISO certified to 9001:2008 standards. We have additional certifications and/or registrations held by certain of our facilities in various geographic locations:

	•		Medical Standard ISO 13485:2003 – United States, Asia, Mexico, Europe
	•		Environmental Standard ISO – 14001 – United States, Asia, Europe
	•		Environmental Standard OSHAS 18001 – Asia, Europe
	•		21 CFR Part 820 (FDA) (Medical) – United States, Asia
	•		Telecommunications Standard TL 9000 – United States, Asia
	•		Aerospace Standard AS9100 – United States, Asia, Europe
	•		NADCAP certification – United States, Asia
	•		FAR 145 certification (FAA repair station) – United States
	•		ITAR (International Traffic and Arms Regulation) self-declaration – United States
	•		ANSI/ESD (Electrostatic Discharge Control Program) S20.20 – United States, Asia
	•		ATEX/IECEx certification – Asia, Europe

Customers and Market Sectors Served

          We provide services to a wide variety of customers, ranging from large multinational companies to smaller emerging technology companies. During fiscal 2010, we served approximately 130 customers. For many customers, we provide design and production capabilities, thereby allowing these customers to concentrate on research and development, concept development, distribution, marketing and sales. This helps accelerate their time to market, reduce their investment in engineering and manufacturing capacity and optimize total product cost.

          Juniper Networks, Inc. (“Juniper”) accounted for 16 percent of our net sales in fiscal 2010, and 20 percent in both fiscal 2009 and fiscal 2008, respectively. No other customer accounted for 10 percent or more of our net sales in fiscal 2010, 2009 or 2008. The loss of any of our major customers could have a significant negative impact on our financial results.

          Many of our large customers contract with us through independent multiple divisions, subsidiaries, production facilities or locations. We believe that in most cases our sales to any one such division, subsidiary, facility or location are not dependent on sales to others.

          The distribution of our net sales by market sectors is shown in the following table:

		Fiscal years ended
Industry		October 2,				October 3,				September 27,
		2010				2009				2008
Wireline/Networking			43%				44%				44%
Wireless Infrastructure			12%				11%				9%
Medical			20%				22%				21%
Industrial/Commercial			18%				13%				16%
Defense/Security/Aerospace			7%				10%				10%
			100%				100%				100%

          Although our current business development focus is based on the end-market sectors noted above, we evaluate our financial performance and allocate our resources on a geographic basis (see Note 13 in Notes to Consolidated Financial Statements regarding our reportable segments). Our array of services for customers in each of these end markets is essentially the same and we do not dedicate operational equipment, personnel, facilities or other resources to particular end markets, nor do we internally track our costs and resources on this basis.

Materials and Suppliers

          We typically purchase raw materials, including printed circuit boards and electronic components, from manufacturers and distributors. In addition, under certain circumstances, we will purchase components from brokers, customers or competitors. The key electronic components we purchase include specialized components such as application-specific integrated circuits, semiconductors, interconnect products, electronic subassemblies (including memory modules, power supply modules and cable and wire harnesses), inductors, resistors and capacitors. Along with these electronic components, we also purchase components used in manufacturing and higher-level assembly. These components include molded/formed plastics, sheet metal fabrications, aluminum extrusions, robotics, motors, vision sensors, motion/actuation, fluidics, displays, die castings and various other hardware and fastener components. All of these components range from standard to highly customized and vary widely in terms of market availability and price.

          Occasional component shortages and subsequent allocations by suppliers are an inherent risk of the electronics industry. Components shortages have been an issue for the industry and for us in fiscal 2010; these shortages are discussed more fully in “Risk Factors” in Part I, Item 1A herein. We actively manage our business to try to minimize our exposure to material and component shortages. We have a corporate sourcing and procurement organization whose primary purpose is to develop supply-chain sources and create strong supplier alliances to ensure, as much as possible, a steady flow of components at competitive prices. We also have a global expediting and escalation process that we believe provides Plexus the ability to effectively track and manage component shortages. Since we design products and therefore can influence the selection of components used in some new products, component manufacturers often provide us with priority access to materials and components, even during times of shortages. We have undertaken a series of initiatives, including the use of advanced supply chain solutions to improve continuity of supply and supply chain flexibility.

New Business Development

          Our new business development is organized around end-markets, or market sectors. Each market sector has a team of dedicated resources including a business development vice president, a customer management vice president, sales account executives, customer directors, customer managers, engineering and manufacturing subject matter experts, and market sector analysts. Our sales and marketing efforts focus on both targeting new customers and expanding business with existing customers. We believe our ability to provide a full range of product realization services is a marketing advantage; our sector teams participate in marketing through direct customer contact and participation in industry events and seminars.

Competition

          The market for the services we provide is highly competitive. We compete primarily on the basis of meeting the unique needs of our customers, and providing flexible solutions, timely order fulfillment and strong engineering, testing and production capabilities. We have many competitors in the EMS industry. Larger and more geographically diverse competitors have substantially more resources than we do. Other, smaller competitors primarily compete only in specific sectors, typically within limited geographical areas. We also compete against companies that design or manufacture items in-house. In addition, we compete against foreign, low-labor cost manufacturers. This foreign, low-labor cost competition tends to focus on commodity and consumer-related products, which is not our focus.

Intellectual Property

          We own various service marks that we use in our business; these marks are registered in the trademark offices of the United States and other countries. Although we own certain patents, they are not currently material to our business. We do not have any material copyrights.

Information Technology

          Our integrated ERP platform serves all of our manufacturing sites. This ERP platform augments our other management information systems and includes software from J.D. Edwards (now part of the Oracle Corporation) and several other vendors. The ERP platform includes various software systems to enhance and standardize our ability to translate information from multiple production facilities into operational and financial information and create a consistent set of core business applications at our facilities worldwide. We believe the related software licenses are of a general commercial character on terms customary for these types of agreements.

Environmental Compliance

          We are subject to a variety of environmental regulations relating to air emission standards and the use, storage, discharge and disposal of hazardous chemicals used during our manufacturing process. We believe that we are in compliance with all federal, state and foreign environmental laws and do not anticipate any significant expenditures in maintaining our compliance; however, there can be no assurance that violations will not occur which could have a material adverse effect on our financial results.

Employees

          Our employees are one of our primary strengths, and we make a considerable effort to maintain a well-qualified and motivated work force. We have been able to offer enhanced career opportunities to many of our employees. Our human resources department identifies career objectives and monitors specific skill developments for employees with potential for advancement. We invest at all levels of the organization to ensure that employees are well trained. We have a policy of involvement and consultation with employees at every facility and strive for continuous improvement at all levels.

          We employ approximately 8,700 full-time employees. Given the quick response times required by our customers, we seek to maintain flexibility to scale our operations as necessary to maximize efficiency. To do so, we use skilled temporary labor in addition to our full-time employees. In the United Kingdom, approximately 210 of our employees are covered by union agreements. These union agreements are typically renewed at the beginning of each year, although in a few cases these agreements may last two or more years. Our employees in the United States, Romania, Malaysia, China and Mexico are not covered by union agreements. We have no history of labor disputes at any of our facilities. We believe that our employee relationships are good.

ITEM 1A.		RISK FACTORS

Our net sales and operating results may vary significantly from period to period.

          Our quarterly and annual results may vary significantly depending on various factors, many of which are beyond our control. These factors include:

	•		the volume and timing of customer demand relative to our capacity
	•		the typical short life-cycle of our customers’ products
	•		customers’ operating results and business conditions
	•		changes in our customers’ sales mix
	•		failures of our customers to pay amounts due to us
	•		volatility of customer demand for certain programs and sectors
	•		challenges associated with the engagement of new customers or additional work from existing customers
	•		the timing of our expenditures in anticipation of future orders
	•		our effectiveness in planning production and managing inventory, fixed assets and manufacturing processes
	•		changes in cost and availability of labor and components and
	•		changes in U.S. and global economic and political conditions and world events.

The majority of our net sales come from a relatively small number of customers and a limited number of market sectors; if we lose any of these customers or if there are problems in those market sectors, our net sales and operating results could decline significantly.

          Net sales to our ten largest customers have represented a majority of our net sales in recent periods. Our ten largest customers accounted for approximately 57 percent of our net sales for both fiscal years ended October 2, 2010 and October 3, 2009. For the fiscal year ended October 2, 2010, there was one customer that represented 10 percent or more of our net sales. Our principal customers may vary from period to period, and our principal customers may not continue to purchase services from us at current levels, or at all. Significant reductions in net sales to any of these customers, or the loss of other major customers, could seriously harm our business.

          In addition, we focus our net sales to customers in only a few market sectors. Each of these sectors is subject to macroeconomic conditions as well as trends and conditions that are sector specific. Shifts in the performance of a sector served by Plexus, as well as the economic and business conditions that affect the sector, can particularly impact Plexus. For instance, sales in the medical sector are substantially affected by trends in that industry, such as government reimbursement rates and uncertainties relating to the financial health and structure of U.S. health care generally. Any weakness in the market sectors in which our customers are concentrated could affect our business and results of operations.

          In the current economic environment, we are seeing increased merger and acquisition activity that has already affected, and may continue to impact, our customers. Specifically, two of our customers were acquired in the first quarter of fiscal 2010. Both of these customers are beginning to reduce orders to Plexus as they transition these programs to other EMS providers.

Instability in the global credit markets and continuing economic weakness may adversely affect our earnings, liquidity and financial condition.

          Global financial and credit markets have been, and continue to be, unstable and unpredictable. Worldwide economic conditions have been weak and may deteriorate further. The instability of the markets and weakness of the economy could continue to affect the demand for our customers’ products, the amount, timing and stability of their product demand from us, the financial strength of our customers and suppliers, their ability or willingness to do business with us, our willingness to do business with them, and/or our suppliers’ and customers’ ability to fulfill their obligations to us and/or the ability of us, our customers or our suppliers to obtain credit. Further, global credit market and economic challenges may affect the ability of counterparties to our agreements, including our credit agreement and interest rate swap agreements, to perform their obligations under those agreements. These factors could adversely affect our operations, earnings and financial condition.

          As of October 2, 2010, we held $2.0 million of auction rate securities maturing on March 17, 2042, which were classified as “other” long-term assets and whose underlying assets are in guaranteed student loans that are backed by a U. S. government agency. If the credit quality deteriorates for these adjustable rate securities, we may in the future be required to record an impairment charge on these investments.

Our customers do not make long-term commitments and may cancel or change their production requirements.

          EMS companies must respond quickly to the requirements of their customers. We generally do not obtain firm, long-term purchase commitments from our customers. Customers also cancel requirements, change production quantities, delay production or revise their forecasts for a number of reasons that are beyond our control. The success of our customers’ products in the market and the strength of the markets themselves affect our business. Cancellations, reductions or delays by a significant customer, or by a group of customers, could seriously harm our operating results and negatively affect our working capital levels. Such cancellations, reductions or delays have occurred and may continue to occur.

          In addition, we make significant decisions based on our estimates of customers’ requirements, including determining the levels of business that we will seek and accept, production schedules, component procurement commitments, working capital management, facility requirements, personnel needs and other resource requirements. The short-term nature of our customers’ commitments and the possibility of rapid changes in demand for their products reduce our ability to accurately estimate the future requirements of those customers. Since many of our operating expenses are fixed, a reduction in customer demand can harm our operating results. Moreover, since our margins vary across customers and specific programs, a reduction in demand with higher margin customers or programs will have a more significant adverse effect on our operating results.

          Rapid increases in customer requirements may stress personnel and other capacity resources. We may not have sufficient resources at any given time to meet all of our customers’ demands or to meet the requirements of a specific program.

          Defense contracting can be subject to extensive procurement processes and other factors that can affect the timing and duration of contracts as well as product demand. For example, defense procurement is subject to continued Congressional appropriations for these programs, as well as continued determinations by the Department of Defense regarding whether to continue them. Products for the military are also subject to continued testing of their operations in the field and changing military operational needs, which could affect the possibility and timing of future orders. While those arrangements may result in a significant amount of net sales in a short period of time, they may or may not result in continuing long-term projects or relationships. Even in the case of continuing long-term projects or relationships, orders in the defense sector can be episodic, can vary significantly from period to period, and are subject to termination.

We have a complex business model, and our failure to properly manage that model could affect our operations and financial results.

          Our business model focuses on products and services in the mid-to-lower-volume, higher-mix segment of the EMS market. Our customers’ products typically require significant production and supply-chain flexibility, necessitating optimized demand-pull-based manufacturing and supply chain solutions across an integrated global platform. The products we manufacture are also typically complex, highly regulated, and require complicated configuration management and direct order fulfillment capabilities to global end customers. Relative to many of our competitors that manufacture more standardized products with larger production runs, our business model requires a greater degree of attention and resources, including working capital, management and technical personnel, and the development and maintenance of systems and procedures to manage diverse manufacturing, regulatory, and service requirements. If we fail to effectively manage our business model, we may lose customer confidence and our reputation may suffer. The Company’s reputation is the foundation of our relationships with key stakeholders. If we are unable to effectively manage real or perceived issues, which could negatively impact sentiments toward the Company, our ability to maintain or expand business opportunities could be impaired and our financial results could suffer on a going-forward basis.

Challenges associated with the engagement of new customers or programs could affect our operations and financial results.

          Our engagement with new customers, as well as the addition of new work for existing customers, can present challenges in addition to opportunities. We need to ensure that our terms of engagement, including our pricing and other contractual provisions, appropriately reflect the anticipated costs, risks, and rewards of an opportunity. The failure to establish appropriate terms of engagement could adversely affect our profitability and margins.

          Also, there are inherent risks associated with the timing and ultimate realization of a new program’s anticipated revenue. Some new programs require us to devote significant capital and personnel resources to new technologies and competencies. We may not meet customer expectations, which could damage our relationships with the affected customers and impact our ability to deliver conforming product on a timely basis. Further, the success of new programs may depend heavily on factors such as product reliability, market acceptance, and/or regulatory

approvals. The failure of a new program to meet expectations on these factors, or our inability to effectively execute on a new program’s requirements, could result in lost financial opportunities and adversely affect our results of operations.

Our manufacturing services involve inventory risk.

          Most of our contract manufacturing services are provided on a turnkey basis, under which we purchase some, or all, of the required raw materials and component parts. Excess or obsolete inventory could adversely affect our operating results.

          In our turnkey operations, we order materials and components based on customer forecasts and/or orders. Suppliers may require us to purchase materials and components in minimum order quantities that may exceed customer requirements. A customer’s cancellation, delay or reduction of forecasts or orders can also result in excess inventory or additional expense to us. Engineering changes by a customer may result in obsolete raw materials or component parts. While we attempt to cancel, return or otherwise mitigate excess and obsolete materials and components and require customers to reimburse us for excess and obsolete inventory, we may not actually be reimbursed timely or be able to collect on these obligations.

          In addition, we provide managed inventory programs for some of our customers under which we hold and manage finished goods or work-in-process inventories. These managed inventory programs result in higher inventory levels, further reduce our inventory turns and increase our financial exposure with such customers. Even though our customers generally have contractual obligations to purchase such inventories from us, we remain subject to the risk of enforcing those obligations.

We may experience raw material and component parts shortages and price fluctuations.

          We do not have any long-term supply agreements. At various times, including fiscal 2010, we have experienced raw material and component parts shortages due to supplier capacity constraints or their failure to deliver. Part shortages were prevalent in fiscal 2010 across the EMS industry, based on the relatively quick recovery of the demand for technological equipment and the resulting capacity constraints at suppliers; shortages have continued into fiscal 2011. Such constraints can also be caused by world events, such as foreign government policies, terrorism, armed conflict, economic recession and epidemics. We rely on a limited number of suppliers for many of the raw materials and component parts used in the assembly process and, in some cases, may be required to use suppliers that are the sole provider of a particular raw material or component part. Such suppliers may encounter quality problems or financial difficulties which could preclude them from delivering raw materials or component parts timely or at all. Some suppliers have ceased doing business due to economic or other circumstances, and more may do so in the future. Supply shortages and delays in deliveries of raw materials or component parts have in some cases resulted in delayed production of assemblies, which have increased our inventory levels and adversely affected our operating results in certain periods. An inability to obtain sufficient inventory on a timely basis could also harm relationships with our customers.

          In addition, raw material and component parts that are delivered to us may not meet our specifications or other quality criteria. Certain materials provided to us may be counterfeit or violate the intellectual property rights of others. The need to obtain replacement materials and parts may negatively affect our manufacturing operations. The inadvertent use of any such parts or products may also give rise to liability claims.

          Raw material and component part supply shortages and delays in deliveries can also result in increased pricing. While many of our customers permit quarterly or other periodic adjustments to pricing based on changes in raw material or component part prices and other factors, we typically bear the risk of price increases that occur between any such repricing or, if such repricing is not permitted, during the balance of the term of the particular customer contract. Conversely, raw material and component part price reductions have contributed positively to our operating results in the past. Our inability to continue to benefit from such reductions in the future could adversely affect our operating results.

Failure to manage periods of growth or contraction, if any, may seriously harm our business.

          Our industry frequently sees periods of expansion and contraction to adjust to customers’ needs and market demands. Plexus regularly contends with these issues and must carefully manage its business to meet customer and market requirements. If we fail to manage these growth and contraction decisions effectively, we can find ourselves with either excess or insufficient resources and our business, as well as our profitability, may suffer.

          Expansion can inherently include additional costs and start-up inefficiencies. We expanded in China (Hangzhou) and Romania (Oradea) in fiscal 2009 and have announced further anticipated expansion in Malaysia (Penang) and a larger, owned facility to replace a leased building in Romania (Oradea). If we are unable to effectively manage our currently anticipated growth, or related anticipated net sales are not realized, our operating results could be adversely affected. In addition, we may expand our operations in new geographical areas where currently we do not operate. Other risks of current or future expansion include:

	•		the inability to successfully integrate additional facilities or incremental capacity and to realize anticipated synergies, economies of scale or other value
	•		additional fixed costs which may not be fully absorbed by new business
	•		difficulties in the timing of expansions, including delays in the implementation of construction and manufacturing plans
	•		diversion of management’s attention from other business areas during the planning and implementation of expansions
	•		strain placed on our operational, financial and other systems and resources and
	•		inability to locate sufficient customers, employees or management talent to support the expansion.

          Periods of contraction or reduced net sales, or other factors affecting particular sites, create other challenges. We must determine whether facilities remain viable, whether staffing levels need to be reduced, and how to respond to changing levels of customer demand. While maintaining multiple facilities or higher levels of employment entail short-term costs, reductions in facilities and/or employment could impair our ability to respond to market improvements or to maintain customer relationships. Our decisions to reduce costs and capacity can affect our short-term and long-term results. When we make decisions to reduce capacity or to close facilities, we frequently incur restructuring charges.

          In addition, to meet our customers’ needs, or to achieve increased efficiencies, we sometimes require additional capacity in one location while reducing capacity in another. For example, in early fiscal 2009 we ceased operations at our former Ayer, Massachusetts facility and reduced headcount in Juarez, Mexico and other North American facilities, even though we continued to expand in other areas. Since customers’ needs and market conditions can vary and change rapidly, we may find ourselves in a situation where we simultaneously experience the effects of contraction in one location and expansion in another location, such as those noted above.

Plexus is a multinational corporation and operating in foreign countries exposes us to increased risks, including adverse local developments and foreign currency risks.

          We have operations in several foreign countries, which in the aggregate represented approximately 55 percent of our revenues for the fiscal year ended October 2, 2010. We also purchase a significant number of components manufactured in foreign countries. These international aspects of our operations, which are likely to increase over time, subject us to the following risks that could materially impact our operations and operating results:

	•		economic, political or civil instability, including significant drug cartel-related violence in Juarez, Mexico
	•		transportation delays or interruptions
	•		foreign exchange rate fluctuations
	•		difficulties in staffing and managing foreign personnel in diverse cultures
	•		compliance with laws, such as the Foreign Corrupt Practices Act, applicable to U.S. companies doing business overseas
	•		the effects of international political developments and
	•		foreign regulatory requirements and potential changes to those requirements.

          We continue to monitor our risk associated with foreign currency translation and have entered into limited forward contracts to minimize this risk. As our foreign operations expand, our failure to adequately hedge foreign currency transactions and/or the currency exposures associated with assets and liabilities denominated in non-functional currencies could adversely affect our consolidated financial condition, results of operations and cash flows.

          In addition, changes in policies by the U.S. or foreign governments could negatively affect our operating results due to changes in duties, tariffs, taxes or limitations on currency or fund transfers. For example, our facility in Mexico operates under the Mexican Maquiladora program, which provides for reduced tariffs and eased import regulations; we could be adversely affected by changes in that program or our failure to comply with its requirements. Also, our Malaysian and Xiamen, China subsidiaries currently receive favorable tax treatments from these governments

that extend through 2019 and 2013, respectively, and are subject to certain conditions with which the Company expects to comply. The Malaysian Investment Development Authority granted approval to extend our tax holiday in Malaysia for a period of five years through December 31, 2024, subject to certain conditions. China and Mexico passed new tax laws that took effect on January 1, 2008. These laws did not materially impact our tax rates in fiscal 2009 or fiscal 2010, but may result in a higher effective tax rate on our operations in future periods. Finally, on November 1, 2009, Mexico adopted tax reform legislation which took effect January 1, 2010, and provides for a temporary increase in its income tax and value added tax rates from 28% to 30% and 15% to 16%, respectively, along with certain other changes. While we continue to analyze the impact of this legislation, we do not currently believe it will have a material impact on our effective income tax rate in future periods. Given the scope of our international operations and our foreign tax arrangements, proposed changes to the manner in which U.S. based multinational companies are taxed in the U.S. could have a material impact on our operating results and competitiveness.

We and our customers are subject to extensive government regulations and third party certification requirements.

          We are subject to extensive government regulation relating to the products we design and manufacture and as to how we conduct our business. These regulations affect the sectors we serve and every aspect of our business, including our labor, employment, workplace safety, environmental and import/export practices, as well as many other facets of our operations. In addition, as a result of customer requirements and the need to enhance our competitive position, we seek to obtain and maintain various certifications from third parties relating to our quality systems and standards. Our failure to comply with these regulations and certifications could seriously affect our operations, customer relationships, reputation and profitability.

          Our medical sector business is subject to substantial government regulation, primarily from the federal Food and Drug Administration (“FDA”) and similar regulatory bodies in other countries. We must comply with statutes and regulations covering the design, development, testing, manufacturing and labeling of medical devices and the reporting of certain information regarding their safety. Failure to comply with these regulations can result in, among other things, fines, injunctions, civil penalties, criminal prosecution, recall or seizure of devices, or total or partial suspension of production. The FDA also has the authority to require repair or replacement of equipment, or the refund of the cost of a device manufactured or distributed by our customers. Violations may lead to penalties or shutdowns of a program or a facility. Failure or noncompliance could have an adverse effect on our reputation as well as our results of operations. In addition, government reimbursement rates and other regulations, as well as the financial health of health care providers, and proposed changes in how health care in the U.S. is structured, could affect the willingness and ability of end customers to purchase the products of our customers in the medical sector.

          We also design and manufacture products for customers in the defense and aerospace industries. Companies that design and manufacture products for these industries face significant regulation by the Department of Defense, Department of State, Federal Aviation Authority, and other governmental agencies in the U.S. as well as in other countries. Failure to comply with those requirements could result in fines, penalties, injunctions, criminal prosecution, and an inability to participate in contracts with the government or their contractors, any of which could materially affect our financial condition and results of operations.

          The end-markets for most of our customers in the wireline/networking and wireless infrastructure sectors are subject to regulation by the Federal Communications Commission, as well as by various state and foreign government agencies. The policies of these agencies can directly affect both the near-term and long-term demand and profitability of the sector and therefore directly impact the demand for products that we manufacture.

          At the corporate level, as a publicly-held company, we are subject to increasingly stringent laws, regulation and other requirements, including the Dodd-Frank Wall Street Reform and Consumer Protection Act, affecting among other areas our accounting, corporate governance practices, and securities disclosures. Our failure to comply with these requirements could materially affect our financial condition and results of operations.

          The growth and changing requirements of our business are imposing a heightened level of activity involving import and export compliance requirements on us. We were notified in April 2009 by U.S. Customs and Border Protection (“CBP”) of its intention to conduct a customary Focused Assessment of our import activities during fiscal 2008 and of our processes and procedures to comply with U.S. Customs laws and regulations. During September 2010 the Company reported errors relating to import trade activity from July 2004 to the date of Plexus’ report. The Company is currently awaiting final determination of CBP duties and fees. Plexus has agreed that it will implement improved processes and procedures and review these corrective measures with CBP. At this time, we do not believe that any deficiencies in processes or controls or unanticipated costs, unpaid duties or penalties associated with this matter will have a material adverse effect on Plexus or the Company’s consolidated financial position, results of operations or cash flows.

          Our operations are subject to federal, state, and local environmental regulations pertaining to air, water, and hazardous waste and the health and safety of our workplace. If we fail to comply with present and future regulations, we could be subject to liabilities or the suspension of business. These regulations could restrict our ability to expand our facilities or require us to acquire costly equipment or incur significant expense associated with the ongoing operation of our business or remediation efforts.

          Our customers are also required to comply with various government regulations, legal requirements, and certification requirements, including many of the industry-specific regulations discussed above. Our customers’ failure to comply could affect their businesses, which in turn would affect our sales to them. In addition, if our customers are required by regulation or other requirements to make changes in their product lines, these changes could significantly disrupt particular projects for these customers and create inefficiencies in our business.

If we are unable to maintain our engineering, technological and manufacturing process expertise, our results may be adversely affected.

          The markets for our manufacturing, engineering and other services are characterized by rapidly changing technology and evolving process developments. Our internal processes are also subject to these factors. The continued success of our business will depend upon our continued ability to:

	•		retain our qualified engineering and technical personnel
	•		maintain and enhance our technological capabilities
	•		choose and maintain appropriate technological and service capabilities
	•		successfully manage the implementation and execution of information systems
	•		develop and market manufacturing services which meet changing customer needs and
	•		successfully anticipate, or respond to, technological changes on a cost-effective and timely basis.

          Although we believe that our operations utilize the assembly and testing technologies, equipment and processes that are currently required by our customers, we cannot be certain that we will develop the capabilities required by our customers in the future. The emergence of new technology, industry standards or customer requirements may render our equipment, inventory or processes obsolete or noncompetitive. In addition, we may have to acquire new design, assembly and testing technologies and equipment to remain competitive. The acquisition and implementation of new technologies and equipment may require significant expense or capital investment that could reduce our liquidity and negatively affect our operating results. Our failure to anticipate and adapt to our customers’ changing technological needs and requirements could have an adverse effect on our business.

An inability to successfully manage the procurement, development, implementation, or execution of information systems may adversely affect our business.

          As a global company with a complex business model, we heavily depend on our information systems to support our customers’ requirements and to successfully manage our business. Any inability to successfully manage the procurement, development, implementation, or execution of our information systems, including matters related to system security, reliability, performance and access, as well as any inability of these systems to fulfill their intended purpose within our business, could have an adverse effect on our business.

Start-up costs and inefficiencies related to new or transferred programs can adversely affect our operating results.

          The management of labor and production capacity in connection with the establishment of new programs and new customer relationships, such as our arrangements with The Coca-Cola Company, and the need to estimate required resources in advance of production can adversely affect our gross and operating margins. These factors are particularly evident in the early stages of the life-cycle of new products and new programs, which lack a track record of order volume and timing, as well as in program transfers between facilities. We are managing a number of new programs at any given time. Consequently, we are exposed to these factors. In addition, if any of these new programs or new customer relationships were terminated, our operating results could worsen, particularly in the short term.

          The effects of these start-up costs and inefficiencies can also occur when we transfer programs between locations. We conduct these transfers on a regular basis to address factors such as meeting customer needs, seeking long-term efficiencies or responding to market conditions, as well as due to facility closures. Although we try to minimize the potential losses arising from transitioning customer programs between Plexus facilities, there are inherent risks that such transitions can result in operational inefficiencies and the disruption of programs and customer relationships.

There may be problems with the products we design or manufacture that could result in liability claims against us and reduced demand for our services.

          The products that we design and/or manufacture may be subject to liability or claims in the event that defects are discovered or alleged. We design and manufacture products to our customers’ specifications, many of which are highly complex. Despite our quality control and quality assurance efforts, problems may occur, or may be alleged, in the design and/or manufacturing of these products. Problems in the products we manufacture, whether real or alleged, whether caused by faulty customer specifications or in the design or manufacturing processes or by a component defect, and whether or not we are responsible, may result in delayed shipments to customers and/or reduced or cancelled customer orders. If these problems were to occur in large quantities or too frequently, our business reputation may also be tarnished. In addition, problems may result in liability claims against us, whether or not we are responsible. These potential claims may include damages for the recall of a product and/or injury to person or property.

          Even if customers or third parties, such as component suppliers, are responsible for defects, they may not, or may not be able to, assume responsibility for any such costs or required payments to us. While we seek to insure against many of these risks, insurance coverage may be either inadequate or unavailable, either in general or for particular types of products. We occasionally incur costs defending claims, and any such disputes could affect our business relationships.

Intellectual property infringement claims against our customers or us could harm our business.

          Our design and manufacturing services and the products offered by our customers involve the creation and use of intellectual property rights, which subject us and our customers to the risk of claims of intellectual property infringement from third parties. In addition, our customers may require that we indemnify them against the risk of intellectual property infringement. If any claims are brought against us or our customers for infringement, whether or not these have merit, we could be required to expend significant resources in defense of those claims. In the event of an infringement claim, we may be required to spend a significant amount of money to develop non-infringing alternatives or obtain licenses. We may not be successful in developing alternatives or obtaining licenses on reasonable terms or at all. Infringement by our customers could cause them to discontinue production of some of their products, potentially with little or no notice, which may reduce our net sales to them and disrupt our production.

          Additionally, if third parties on whom we rely for products or services, such as component suppliers, are responsible for an infringement (including through the supply of counterfeit parts), we may or may not be able to hold them responsible and we may incur costs in defending claims or providing remedies. Such infringements may also cause our customers to abruptly discontinue selling the impacted products, which would adversely affect our net sales of those products, and could affect our customer relationships more broadly. Similarly, claims affecting our suppliers could cause those suppliers to discontinue selling materials and components upon which we rely.

Our products are for end markets that require technologically advanced products with relatively short life-cycles.

          Factors affecting the technology-dependent end markets that we serve, in particular short product life-cycles, could seriously affect our customers and, as a result, Plexus. These factors include:

	•		the inability of our customers to adapt to rapidly changing technology and evolving industry standards that result in short product life-cycles
	•		the inability of our customers to develop and market their products, some of which are new and untested and
	•		the potential that our customers’ products may become obsolete or the failure of our customers’ products to gain widespread commercial acceptance.

          Even if our customers successfully respond to these market challenges, their responses, including any consequential changes we must make in our business relationships with them and our production for them, can affect our production cycles, inventory management and results of operations.

Increased competition may result in reduced demand or reduced prices for our services.

          The EMS industry is highly competitive and has become more so as a result of excess capacity in the industry. We compete against numerous U.S. and foreign EMS providers with global operations, as well as those which operate on only a local or regional basis. In addition, current and prospective customers continually evaluate the merits of manufacturing products internally and may choose to manufacture products themselves rather than outsource that process. Consolidations and other changes in the EMS industry result in a changing competitive landscape.

          Some of our competitors have substantially greater managerial, manufacturing, engineering, technical, financial, systems, sales and marketing resources than ourselves. These competitors may:

	•		respond more quickly to new or emerging technologies
	•		have greater name recognition, critical mass and geographic and market presence
	•		be better able to take advantage of acquisition opportunities
	•		adapt more quickly to changes in customer requirements
	•		devote greater resources to the development, promotion and sale of their services and
	•		be better positioned to compete on price for their services.

          We may operate at a cost disadvantage compared to other EMS providers that have lower internal cost structures or greater direct buying power with component suppliers, distributors and raw material suppliers. Our manufacturing processes are generally not subject to significant proprietary protection, and companies with greater resources or a greater market presence may enter our market or become increasingly competitive. Increased competition could result in significant price reductions, reduced sales and margins, or loss of market share.

We depend on certain key personnel, and the loss of key personnel may harm our business.

          Our success depends in large part on the continued services of our key technical and management personnel, and on our ability to attract, develop and retain qualified employees, particularly highly skilled design, process and test engineers involved in the development of new products and processes and the manufacture of products. The competition for these individuals is significant, and the loss of key employees could harm our business.

          From time to time, there are changes and developments, such as retirements, disability, death and other terminations of service that affect our executive officers and other key employees. Transitions of responsibilities among officers and key employees, particularly those that are unplanned, inherently can cause disruptions to our business and operations, which could have an effect on our results.

Energy price increases may reduce our profits.

          We use some components made with petroleum-based materials. In addition, we use various energy sources transporting, producing and distributing products. Energy prices have recently been subject to volatility caused by market fluctuations, supply and demand, currency fluctuation, production and transportation disruption, world events, and changes in governmental programs.

          Energy price increases raise both our material and operating costs. We may not be able to increase our prices enough to offset these increased costs. Increasing our prices also may reduce our level of future customer orders and profitability.

Natural disasters, epidemics and other events outside our control, and the ineffective management of such events, may harm our business.

          Some of our facilities are located in areas that may be impacted by natural disasters, including hurricanes, earthquakes, water shortages, tsunamis and floods. All facilities are subject to other natural or man-made disasters such as those related to global climate change, fires, acts of terrorism, failures of utilities and epidemics. If such an event was to occur, our business could be harmed due to the event itself or due to our inability to effectively manage the effects of the particular event; potential harms include the loss of business continuity, the loss of business data and damage to infrastructure.

          In addition, some of our facilities possess certifications necessary to work on specialized products that our other locations lack. If work is disrupted at one of these facilities, it may be impractical or we may be unable to transfer such specialized work to another facility without significant costs and delays. Thus, any disruption in operations at a facility possessing specialized certifications could adversely affect our ability to provide products and services to our customers, and thus negatively affect our relationships and financial results.

We may fail to secure or maintain necessary financing.

          Under our credit facility, we have borrowed $150 million in term loans and can borrow up to $200 million in revolving loans of which $100 million is currently available, depending upon compliance with its defined covenants and conditions. However, we cannot be certain that the credit facility will provide all of the financing capacity that we will need in the future or that we will be able to change the credit facility or revise covenants, if necessary or appropriate in the future, to accommodate changes or developments in our business and operations. In addition, as a consequence of the turmoil in the global financial markets and banking systems, it is possible that counterparties to our

financial agreements, including our credit agreement and our interest rate swap agreements, may not be willing or able to meet their obligations.

          Our future success may depend on our ability to obtain additional financing and capital to support possible future growth and future initiatives. We may seek to raise capital by issuing additional common stock, other equity securities or debt securities, modifying our existing credit facilities or obtaining new credit facilities or a combination of these methods.

          We may not be able to obtain capital when we want or need it, and capital may not be available on satisfactory terms. If we issue additional equity securities or convertible securities to raise capital, it may be dilutive to shareholders’ ownership interests. Furthermore, any additional financing may have terms and conditions that adversely affect our business, such as restrictive financial or operating covenants, and our ability to meet any financing covenants will largely depend on our financial performance, which in turn will be subject to general economic conditions and financial, business and other factors.

If we are unable to maintain effective internal control over our financial reporting, investors could lose confidence in the reliability of our financial statements, which could result in a reduction in the value of our common stock.

          As required by Section 404 of the Sarbanes-Oxley Act, the SEC adopted rules requiring public companies to include a report of management on the company’s internal control over financial reporting in their annual reports on Form 10-K; that report must contain an assessment by management of the effectiveness of our internal control over financial reporting. In addition, the independent registered public accounting firm auditing a company’s financial statements must attest to and report on the effectiveness of the company’s internal control over financial reporting.

          We are continuing our comprehensive efforts to comply with Section 404 of the Sarbanes-Oxley Act. If we are unable to maintain effective internal control over financial reporting, this could lead to a failure to meet our reporting obligations to the SEC, which in turn could result in an adverse reaction in the financial markets due to a loss of confidence in the reliability of our financial statements.

The price of our common stock has been and may continue to be volatile.

          Our stock price has fluctuated significantly in recent periods. The price of our common stock may fluctuate in response to a number of events and factors relating to us, our competitors and the market for our services, many of which are beyond our control.

          In addition, the stock market in general, and share prices for technology companies in particular, have from time to time experienced extreme volatility, including weakness, that sometimes has been unrelated to the operating performance of these companies. These broad market and industry fluctuations, and concerns affecting the economy generally, may adversely affect the market price of our common stock, regardless of our operating results.

          Among other things, volatility and weakness in our stock price could mean that investors may not be able to sell their shares at or above the prices that they paid. Volatility and weakness could also impair our ability in the future to offer common stock or convertible securities as a source of additional capital and/or as consideration in the acquisition of other businesses.

ITEM 1B.		UNRESOLVED SEC STAFF COMMENTS

          None.

ITEM 2.		PROPERTIES

          Our facilities comprise an integrated network of engineering and manufacturing centers with our corporate headquarters located in Neenah, Wisconsin. We own or lease facilities with approximately 2.8 million square feet of capacity. This includes approximately 1.6 million square feet in the United States, approximately 0.2 million square feet in Mexico, approximately 0.9 million square feet in Asia and approximately 0.1 million square feet in Europe. Approximately 0.2 million square feet of this capacity is subleased. Our facilities are described in the following table:

		Location		Type		Size (sq. ft.)				Owned/Leased
		Penang, Malaysia (1)		Manufacturing/Engineering			671,000			Owned
		Neenah, Wisconsin (1)		Manufacturing			277,000			Leased
		Appleton, Wisconsin (1)		Manufacturing			272,000			Owned
		Nampa, Idaho		Manufacturing			216,000			Owned
		Juarez, Mexico (2)		Manufacturing			210,000			Leased
		Buffalo Grove, Illinois (1)		Manufacturing/Warehouse			189,000			Leased
		Xiamen, China		Manufacturing			120,000			Leased
		Hangzhou, China		Manufacturing			106,000			Leased
		Kelso, Scotland		Manufacturing			57,000			Owned
		Galashiels, Scotland (1)		Manufacturing/Warehouse/Office			43,000			Leased
		Fremont, California		Manufacturing			46,000			Leased
		Oradea, Romania (1)		Manufacturing/Office			20,000			Leased
		Neenah, Wisconsin		Engineering/Office			105,000			Owned
		Raleigh, North Carolina (1)		Engineering			28,000			Leased
		Louisville, Colorado (1) (3)		Engineering			24,000			Leased
		Darmstadt, Germany (4)		Engineering			16,000			Leased
		Livingston, Scotland		Engineering			4,000			Leased
		Neenah, Wisconsin (5)		Global Headquarters			104,000			Owned
		Neenah, Wisconsin (1)		Office/Warehouse			84,000			Owned
		Neenah, Wisconsin		Warehouse			39,000			Leased
		San Diego, California (6)		Inactive/Other			198,000			Leased

          During October 2010, we announced our plans to construct a manufacturing facility in Oradea, Romania that will replace the facility we currently lease. The Company anticipates beginning construction during fiscal 2011.

          In October 2010, we entered into an agreement to purchase land in Xiamen, China and anticipate beginning construction of an additional manufacturing facility during fiscal 2011.

          In July 2010, we entered into an agreement to purchase state leasehold land in Penang, Malaysia, subject to various purchase contingencies. The Company began construction of an additional manufacturing facility on the land during early fiscal 2011.

          Plexus completed the construction of a new corporate headquarters office facility in Neenah, Wisconsin, which was occupied during the third quarter of fiscal 2010. The building is owned by Plexus and located on a parcel of real estate on which Plexus has a ground lease with an option to purchase. The former Plexus headquarters facility in Neenah, Wisconsin, continues to be utilized primarily for engineering services.

ITEM 3.		LEGAL PROCEEDINGS

          In fiscal 2010, the Company determined that we would incur expenses up to approximately $1.1 million relating to non-conforming inventory received from a supplier, for which we expect partial recovery during fiscal 2011.

          We were notified in April 2009 by U.S. Customs and Border Protection (“CBP”) of its intention to conduct a customary Focused Assessment of our import activities during fiscal 2008 and of our processes and procedures to comply with U.S. Customs laws and regulations. During September 2010 the Company reported errors relating to import trade activity from July 2004 to the date of Plexus’ report. The Company is currently awaiting final determination of CBP duties and fees. Plexus has agreed that it will implement improved processes and procedures and review these corrective measures with CBP. At this time, we do not believe that any deficiencies in processes or controls or unanticipated costs, unpaid duties or penalties associated with this matter will have a material adverse effect on Plexus or the Company’s consolidated financial position, results of operations or cash flows.

          In December 2009, the Company received settlement funds of approximately $3.2 million related to a court case in which the Company was a plaintiff. The settlement related to prior purchases of inventory and therefore was recorded as a reduction of cost of sales.

          The Company is party to certain other lawsuits in the ordinary course of business. Management does not believe that these proceedings, individually or in the aggregate, will have a material adverse effect on the Company’s consolidated financial position, results of operations or cash flows.

EXECUTIVE OFFICERS OF THE REGISTRANT

          The following table sets forth our executive officers, their ages and the positions currently held by each person:

		Name		Age				Position
		Dean A. Foate			52			President, Chief Executive Officer and Director
		Ginger M. Jones			46			Vice President and Chief Financial Officer
		Michael D. Buseman			49			Senior Vice President - Global Manufacturing Operations
		Steven J. Frisch			44			Regional President - Plexus EMEA and Senior Vice President – Global Engineering Services
		Todd P. Kelsey			45			Senior Vice President - Global Customer Services
		Yong Jin Lim			50			Regional President - Plexus Asia Pacific
		Joseph E. Mauthe			48			Vice President - Global Human Resources
		Angelo M. Ninivaggi			43			Vice President, General Counsel, Corporate Compliance Officer and Secretary
		Michael T. Verstegen			52			Senior Vice President - Global Market Development

Dean A. Foate joined Plexus in 1984 and has served as President and Chief Executive Officer since 2002, and as a director since 2000.

Ginger M. Jones joined Plexus in 2007 as Vice President - Finance and since August 2007 has served as Vice President and Chief Financial Officer. Prior to joining Plexus, Ms. Jones served as the Vice President and Corporate Controller for Banta Corporation from 2002 to 2007.

Michael D. Buseman joined Plexus in 2006 and began serving as Senior Vice President - Global Manufacturing Operations in 2007. Previously, he held various management roles in the Company including Vice President for Plexus Electronic Assembly - North American Operations and Vice President Manufacturing Technology and Quality. Prior

to joining Plexus, Mr. Buseman served as Vice President and General Manager of Operations in Arden Hills, Minnesota for Celestica, Inc. from 2003 to 2006.

Steven J. Frisch joined Plexus in 1990 and began serving as Regional President – Plexus EMEA in October 2010, while retaining his responsibilities as Senior Vice President – Global Engineering Services, which began in 2007. Previously, Mr. Frisch served as Vice President of Plexus Technology Group’s Raleigh and Livingston Design Centers from 2002 to 2007.

Todd P. Kelsey joined Plexus in 1994 and began serving as Senior Vice President – Global Customer Services in August 2007. Previously, Mr. Kelsey served as Vice President and then Senior Vice President of Plexus Technology Group from 2001 to 2007.

Yong Jin Lim joined Plexus in 2002 and began serving as Regional President – Plexus Asia Pacific in 2007. From 2003 to 2007 he served as Vice President of Operations – Asia.

Joseph E. Mauthe joined Plexus in 2007 and began serving as Vice President – Global Human Resources in February 2008. Prior to joining Plexus, Mr. Mauthe served as Senior Director, Human Resources and various other positions for Kimberly-Clark Corporation from 1985 to 2007.

Angelo M. Ninivaggi joined Plexus in 2002 as Director of Legal Services. Since 2006, Mr. Ninivaggi has served as Vice President, General Counsel and Secretary and, since 2007, Mr. Ninivaggi has also served as Corporate Compliance Officer.

Michael T. Verstegen joined Plexus in 1983, serving in various engineering positions, and has served as Senior Vice President, Global Market Development since 2006. Prior thereto, he served as Vice President from 2002 to 2006.

PART II

ITEM 5.		MARKET FOR REGISTRANT’S COMMON EQUITY, RELATED STOCKHOLDER MATTERS AND ISSUER PURCHASES OF EQUITY SECURITIES

Market Price per Share

          For the fiscal years ended October 2, 2010 and October 3, 2009, the Company’s common stock has traded on the Nasdaq Stock Market, in the Nasdaq Global Select Market tier. The price information below represents high and low sale prices of our common stock for each quarterly period.

Fiscal Year Ended October 2, 2010												Fiscal Year Ended October 3, 2009
		High				Low								High				Low
First Quarter Second Quarter		$ $	29.67 38.00			$ $	23.96 27.42					First Quarter Second Quarter		$ $	21.32 18.22			$ $	11.62 10.48
Third Quarter		$	39.66			$	25.58					Third Quarter		$	23.68			$	14.44
Fourth Quarter		$	31.69			$	21.08					Fourth Quarter		$	27.36			$	18.87

Performance Graph

          The following graph compares the cumulative total return on Plexus common stock with the Nasdaq Stock Market Index for U.S. Companies and the Nasdaq Stock Market Index for Electronics Components Companies, both of which include Plexus. The values on the graph show the relative performance of an investment of $100 made on September 30, 2005, in Plexus common stock and in each of the indices. While the information presented below for 2005-2009 is provided as of the last business day of the respective fiscal year, information was not yet available for either of the indices at the time of preparation of this Report. Therefore, the fiscal 2010 information is presented as of September 30, 2010, the most recent date such information was available. Plexus stock closed at $29.35 on September 30, 2010, and at $30.73 on October 1, 2010, the last business day of fiscal 2010. By means of comparison to another market index that was available at the time of preparation of this Report, the Nasdaq Composite closed at 2,368.62 on September 30, 2010, and at 2,370.75 on October 1, 2010.

Comparison of Cumulative Total Return

				2005				2006				2007				2008				2009				2010
		Plexus			100				112				160				127				149				172
		Nasdaq-US			100				105				125				103				76				89
		Nasdaq-Electronics			100				102				133				96				94				101

Shareholders of Record; Dividends

          As of November 12, 2010, there were approximately 660 shareholders of record. We have not paid any cash dividends. We currently anticipate that the majority of earnings in the foreseeable future will be retained to finance the development of our business. However, the Company evaluates from time to time potential uses of excess cash, which in the future may include share repurchases, a special dividend or recurring dividends. See also Part II, Item 7, “Management’s Discussion and Analysis of Financial Condition and Results of Operations – Liquidity and Capital Resources”, for a discussion of the Company’s intentions regarding dividends, and loan covenants which could restrict dividend payments.

ITEM 6.		SELECTED FINANCIAL DATA

Financial Highlights (dollars in thousands, except per share amounts)

		Fiscal Years Ended
Operating Statement Data		October 2,				October 3,				September 27,				September 29,				September 30,
		2010				2009				2008				2007				2006
Net sales		$	2,013,393			$	1,616,622			$	1,841,622			$	1,546,264			$	1,460,557
Gross profit			206,922				154,776				205,761				163,539				158,700
Gross margin percentage			10.3	%			9.6	%			11.2	%			10.6	%			10.9	%
Operating income			99,652				53,067	(1)			102,827	(2)			79,438	(3)			80,262
Operating margin percentage			4.9	%			3.3	%			5.6	%			5.1	%			5.5	%
Net income			89,533				46,327	(1)			84,144	(2)			65,718	(3)			100,025	(4)
Earnings per share (diluted)		$	2.19			$	1.17	(1)		$	1.92	(2)		$	1.41	(3)		$	2.15	(4)
Cash Flow Statement Data
Cash flows provided by operations		$	1,962			$	170,296			$	64,181			$	38,513			$	83,084
Capital equipment additions			74,674				57,427				54,329				47,837				34,865
Balance Sheet Data
Working capital		$	523,472			$	459,113			$	439,077			$	427,116			$	359,068
Total assets			1,290,379				1,022,672				992,230				916,516				801,462
Long-term debt and capital lease obligations			112,466				133,163				154,532				25,082				25,653
Shareholders’ equity			651,855				527,446				473,945				573,265				481,567
Return on average assets			7.7	%			4.6	%			8.8	%			7.7	%			14.3	%
Return on average equity			15.2	%			9.3	%			16.1	%			12.5	%			24.3	%
Inventory turnover ratio			4.1	x			4.4	x			5.3	x			5.5	x			6.4	x

          We have not paid cash dividends in the past.

ITEM 7.		MANAGEMENT’S DISCUSSION AND ANALYSIS OF FINANCIAL CONDITION AND RESULTS OF OPERATIONS

OVERVIEW

          Plexus Corp. and its subsidiaries (together “Plexus,” the “Company,” or “we”) participate in the Electronic Manufacturing Services (“EMS”) industry. We deliver optimized Product Realization solutions through a unique Product Realization Value Stream service model. This customer focused service model seamlessly integrates innovative product design, customized supply chain solutions, uniquely configured “focused factory” manufacturing, global end-market fulfillment and after-market services to deliver comprehensive end-to-end solutions for customers. We provide these services to original equipment manufacturers (“OEMs”) and other technology companies in the wireline/networking, wireless infrastructure, medical, industrial/commercial and defense/security/aerospace market sectors. We provide advanced product design, manufacturing and testing services to our customers with a focus on the mid-to-lower-volume, higher complexity segment of the EMS market. Our customers’ products typically require exceptional production and supply-chain flexibility, necessitating an optimized demand-pull-based manufacturing and supply chain solution across an integrated global platform. Many of our customers’ products require complex configuration management and direct order fulfillment to their customers across the globe. In such cases we provide global logistics management and after-market service and repair. Our customers’ products may have stringent requirements for quality, reliability and regulatory compliance. We offer our customers the ability to outsource all phases of product realization, including product specifications; development, design and design verification; regulatory compliance support; prototyping and new product introduction; manufacturing test equipment development; materials sourcing, procurement and supply-chain management; product assembly/manufacturing, configuration and test; order fulfillment, logistics and service/repair.

          Plexus is passionate about its goal to be the best EMS company in the world at providing services for customers that have mid-to-lower-volume requirements and a higher complexity of products. We have tailored our engineering services, manufacturing operations, supply-chain management, workforce, business intelligence systems, financial goals and metrics specifically to support these types of programs. Our flexible manufacturing facilities and processes are designed to accommodate customers with multiple product-lines and configurations as well as unique quality and regulatory requirements. Each of these customers is supported by a multi-disciplinary customer team and one or more uniquely configured “focus factories” supported by a supply-chain and logistics solution specifically designed to meet the flexibility and responsiveness required to support that customer’s fulfillment requirements.

          Our go-to-market strategy is also tailored to our target market sectors and business strategy. We have business development and customer management teams that are dedicated to each of the five sectors we serve. These teams are accountable for understanding the sector participants, technology, unique quality and regulatory requirements and longer-term trends in these sectors. Further, these teams help set our strategy for growth in these sectors with a particular focus on expanding the services and value-add that we provide to our current customers while strategically targeting select new customers to add to our portfolio.

          Our financial model is aligned with our business strategy, with our primary focus to earn a return on invested capital (“ROIC”) in excess of our weighted average cost of capital (“WACC”). The smaller volumes, flexibility requirements and fulfillment needs of our customers typically result in greater investments in inventory than many of our competitors, particularly those that provide EMS services for high-volume, less complex products with less stringent requirements (such as consumer electronics). In addition, our cost structure relative to these peers includes higher investments in selling and administrative costs as a percentage of sales to support our sector-based go-to-market strategy, smaller program sizes, flexibility, and complex quality and regulatory compliance requirements. By exercising discipline to generate a ROIC in excess of our WACC, our goal is to ensure that Plexus creates a value proposition for our shareholders as well as our customers.

          Our customers include both industry-leading OEMs and other technology companies that have never manufactured products internally. As a result of our focus on serving market sectors that rely on advanced electronics technology, our business is influenced by technological trends such as the level and rate of development of telecommunications infrastructure, the expansion of networks and use of the Internet. In addition, the federal Food and Drug Administration’s approval of new medical devices, defense procurement practices and other governmental approval and regulatory processes can affect our business. Our business has also benefited from the trend to increased outsourcing by OEMs.

          We provide most of our contract manufacturing services on a turnkey basis, which means that we procure some or all of the materials required for product assembly. We provide some services on a consignment basis, which

means that the customer supplies the necessary materials, and we provide the labor and other services required for product assembly. Turnkey services require material procurement and warehousing, in addition to manufacturing, and involve greater resource investments than consignment services. Other than certain test equipment and software used for internal operations, we do not design or manufacture our own proprietary products.

          The following information should be read in conjunction with our consolidated financial statements included herein and “Risk Factors” included in Part I, Item 1A herein.

EXECUTIVE SUMMARY

          As a consequence of the Company’s use of a “4-4-5” weekly accounting system, periodically an additional week must be added to the fiscal year to re-align with a fiscal year end at the Saturday closest to September 30. In fiscal 2009, this required an additional week, which was added to the first fiscal quarter. Therefore, the comparisons between fiscal 2010 and fiscal 2009 reflect that fiscal 2010 included 364 days while fiscal 2009 included 371 days.

          Fiscal 2010. Net sales for fiscal 2010 increased by $396.8 million, or 24.5 percent, from fiscal year 2009 to $2,013.4 million. Net sales increased in all of our market sectors during fiscal 2010, except for a slight decrease in the defense/security/aerospace sector. The overall higher net sales were driven primarily by stronger end-market conditions, as well as the ramp of production for new customer programs in the wireless infrastructure, wireline/networking, industrial/commercial, and medical sectors. These increases were partially offset by decreased net sales from two defense/security/aerospace sector customers, as well as decreased net sales to Juniper Networks, Inc. (“Juniper”). Net sales to Juniper, our largest customer, declined slightly as a result of decreased end-market demand for the mix of Juniper products produced by us.

          Gross margin was 10.3 percent for fiscal 2010, which compared favorably to 9.6 percent for fiscal 2009. Gross margins in fiscal 2010 were higher due to the increased net sales, changes in customer mix and proceeds from a litigation settlement (see Note 12), partially offset by increases in variable incentive compensation expense due to strong financial performance as well as fixed expenses as a result of higher headcount.

          Selling and administrative expenses were $107.3 million for fiscal 2010, an increase of $14.2 million, or 15.3 percent, from the $93.1 million for fiscal 2009. Sixty percent of the increase was due to higher variable incentive compensation in fiscal 2010 as compared to fiscal 2009. The remainder of the increase was driven primarily by increased employee compensation expense as a result of higher headcount to support revenue growth.

          For fiscal 2010, the Company did not incur any restructuring or impairment charges as compared to restructuring and asset impairment charges of $8.6 million in fiscal 2009, as explained below.

          Net income for fiscal 2010 was $89.5 million and diluted earnings per share were $2.19, which compared favorably to net income of $46.3 million, or $1.17 per diluted share, for fiscal 2009. Net income increased from the prior year period due to overall increased sales and higher gross margins, offset by increased fixed expenses and selling and administrative expenses. The effective tax rate in the current year period was 1 percent, which compares unfavorably to the 2 percent tax benefit in the prior year period. The increase in effective tax rate from the prior year period was primarily due to the mix of the Company’s fiscal 2010 pre-tax income and the absence in 2010 of a net $1.4 million tax benefit resulting from a discrete event that occurred in fiscal 2009.

          Fiscal 2009. Net sales for fiscal 2009 decreased by $225.0 million, or 12 percent, from fiscal year 2008 to $1,616.6 million. The challenging global economic environment contributed to lower revenues and decreased demand in all five of our end-market sectors. The overall reduction in net sales was driven primarily by decreased demand, resulting from economic conditions and lower end-market demand for our customers’ products, in particular from customers in the industrial/commercial, defense/security/aerospace and wireline/networking sectors. In addition, the inability of our customer to secure additional orders for the product we formerly manufactured for our unnamed defense customer led to decreased demand of $57.4 million. Net sales in our wireline/networking sector declined mainly due to decreased demand from several customers, including Juniper, our largest customer.

          The impact of overall economic conditions significantly contributed to reduced revenue, gross margin and ROIC below our normal expectations for the business. As a result, we took action in the second fiscal quarter of 2009 to control costs, including reducing discretionary spending and workforce reductions, as described in Note 10 to our Consolidated Financial Statements. In addition, we believe we took prudent steps to reduce our planned capital expenditures and working capital investments to balance potential future growth with then-current results.

          Gross margin was 9.6 percent for fiscal 2009, which compared unfavorably to 11.2 percent for fiscal 2008. Gross margin in fiscal 2009 was negatively impacted by the decline in net sales and unfavorable changes in customer mix, particularly related to our unnamed defense customer as well as reduced demand from Juniper.

          Selling and administrative expenses were $93.1 million for fiscal 2009, a decrease of $7.7 million, or 7.6 percent, from the $100.8 million for fiscal 2008. Decreased variable incentive compensation of $5.4 million as compared to fiscal 2008, as well as reductions relating to cost-cutting measures, contributed to the decline.

          Restructuring and asset impairment charges were $8.6 million in fiscal 2009, related to goodwill impairment in our Europe reportable segment, the closure of our Ayer facility and the reduction of our workforce across our United States facilities and in Juarez. For fiscal 2008, we recorded restructuring and asset impairment charges of $2.1 million, related to the announcement of the closure of our Ayer facility and the reduction of our workforce in Juarez.

          Net income for fiscal 2009 was $46.3 million and diluted earnings per share were $1.17, which compared unfavorably to net income of $84.1 million, or $1.92 per diluted share, for fiscal 2008. Fiscal 2009 was favorably impacted by a 2 percent effective tax rate benefit, a decrease from the 18 percent effective tax rate in fiscal 2008, due to a higher proportion of income in Malaysia and Xiamen, China, where we currently have reduced tax rates due to tax holidays which extend through 2019 and 2013, respectively.

          Other. The effective income tax rates (benefits) for fiscal 2010, 2009 and 2008 were 1 percent, (2) percent and 18 percent, respectively. The changes in our effective tax rate from fiscal 2008 to fiscal 2010 is primarily due to a higher proportion of income in Malaysia and Xiamen, China, where we currently have reduced tax rates due to tax holidays. We received approval from the Malaysian Investment Development Authority to extend the tax holiday in Malaysia for a period of five years through December 31, 2024, subject to certain conditions.

          ROIC. One of our metrics for measuring financial performance is after-tax ROIC. We define after-tax ROIC as tax-effected operating income, excluding unusual charges, divided by average capital employed over a rolling five quarter period. Capital employed is defined as equity plus debt, less cash and cash equivalents and short-term investments. ROIC was 19.5 percent, 13.2 percent and 20.1 percent for fiscal 2010, 2009 and 2008, respectively. See the table below for our calculation of ROIC (dollars in millions):

		Fiscal years ended
		October 2,				October 3,				September 27,
		2010				2009				2008
Operating income (tax effected), excluding unusual charges		$	98.7			$	59.9			$	86.1
Average invested capital			506.8				453.6				428.7
After-tax ROIC			19.5	%			13.2	%			20.1	%

          ROIC is a non-GAAP financial measure which should be considered in addition to, not as a substitute for, measures of the Company’s financial performance prepared in accordance with United States generally accepted accounting principles (“GAAP”). Non-GAAP financial measures, including ROIC, are used for internal management assessments because such measures provide additional insight into ongoing financial performance. In particular, we provide ROIC because we believe it offers insight into the metrics that are driving management decisions as well as management’s performance under the tests which it sets for itself.

          For a reconciliation of ROIC to our financial statements that were prepared using GAAP, see Exhibit 99.1 to this annual report on Form 10-K, which exhibit is incorporated herein by reference.

          Fiscal 2011 outlook. Our current expectations for fiscal 2011 are to continue to capitalize on the ramp of new business wins and a strengthening economy, which should result in improved customer demand. This should help us achieve our long-term goals of compounded annual revenue growth of 15% or more and ROIC of 500 basis points above our estimated WACC. We review our internal calculation of WACC annually, and in fiscal 2010 reduced our estimate of WACC from 15.0% to 13.5%. This reduction is the result of lower beta for our shares and higher levels of debt in our capital structure, and will become effective for internal use in fiscal 2011.

          Based on customer forecasts and current economic conditions, we currently expect net sales in the first quarter of fiscal 2011 to be in the range of $550 million to $580 million; however, our results will ultimately depend upon the actual level of customer orders and production. We are experiencing the termination of business relationships with two of our customers, both of which were acquired in fiscal 2010, which we anticipate will adversely affect sales beginning in the first quarter of fiscal 2011. We will also be subject to changes in factors affecting the economy as a whole, some of which may differ from our expectations. Assuming that net sales are in the range noted above, we would currently

expect to earn, before any restructuring and impairment costs, between $0.56 to $0.62 per diluted share in the first quarter of fiscal 2011.

          We currently expect the annual effective tax rate for fiscal 2011 to be approximately three to five percent due to the mix of pre-tax income expected to occur in each tax jurisdiction. Due to significant tax rate differences in the jurisdictions in which we operate, our effective tax rate can change significantly as the relative amount of income earned in these jurisdictions changes. China and Mexico passed new tax laws that were effective on January 1, 2008. Also, on November 1, 2009, Mexico adopted tax reform legislation that took effect on January 1, 2010 and provides for a temporary increase in its income tax and value added tax rates from 28% to 30% and 15% to 16%, respectively, along with certain other changes. These new laws have not yet materially impacted our tax rates, but may result in a higher effective tax rate on our operations in future periods.

          See “Risk Factors,” in Part I, Item 1A hereof, which sets forth some of the other factors which could affect our net sales, operations and earnings going forward.

RESULTS OF OPERATIONS

          Net sales. Net sales for the indicated periods were as follows (dollars in millions):

		Fiscal years ended								Variance				Fiscal years ended								Variance
		October 2,				October 3,				Increase/				October 3,				September 27,				Increase/
		2010				2009				(Decrease)				2009				2008				(Decrease)
Net sales		$	2,013.4			$	1,616.6				$396.8     24.5%			$	1,616.6			$	1,841.6			$	(225.0)     (12.2)%

          Net sales for fiscal 2010 increased $396.8 million, or 24.5 percent, as compared to fiscal 2009. The net sales increase resulted from higher net sales in all of our market sectors, except for a slight decrease in the defense/security/aerospace sector. The overall higher net sales were driven primarily by strong end-market conditions, as well as the addition of new customers in the wireless infrastructure, wireline/networking, industrial/commercial and medical sectors. These net sales increases were offset in part by decreased net sales to two defense/security/aerospace customers, as well as lower net sales to Juniper as a result of a decline in end-market demand for the mix of Juniper products produced by us.

          Net sales for fiscal 2009 decreased 12.2 percent from fiscal 2008. The net sales decline was due to decreased demand from customers in each of our five end-market sectors, primarily due to decreased end-market demand. Significant decreases were noted in our industrial/commercial, defense/security/aerospace and wireline/networking sectors. In addition, the inability of our customer to secure additional orders for the product we formerly manufactured for our unnamed defense customer led to decreased demand of $57.4 million. Net sales in our wireline/networking sector decreased mainly due to decreased demand from several customers, including Juniper, our largest customer.

          Our net sales percentages by market sector for the indicated periods were as follows:

		Fiscal years ended
		October 2,				October 3,				September 27,
		2010				2009				2008
Wireline/Networking			43%				44%				44%
Wireless Infrastructure			12%				11%				9%
Medical			20%				22%				21%
Industrial/Commercial			18%				13%				16%
Defense/Security/Aerospace			7%				10%				10%
			100%				100%				100%

          The percentages of net sales to customers representing 10 percent or more of net sales and net sales to our ten largest customers for the indicated periods were as follows:

		Fiscal years ended
		October 2,				October 3,				September 27,
		2010				2009				2008
Juniper			16	%			20	%			20	%
Top 10 customers			57	%			57	%			60	%

          Net sales to our largest customers may vary from time to time depending on the size and timing of customer program commencements, terminations, delays, modifications and transitions. We remain dependent on continued net sales to our significant customers, and our customer concentration with our top 10 customers has remained at or above 55 percent during the year. We generally do not obtain firm, long-term purchase commitments from our customers. Customers’ forecasts can and do change as a result of changes in their end-market demand and other factors, including global economic conditions. Any material change in forecasts or orders from these major accounts, or other customers, could materially affect our results of operations. In addition, as our percentage of net sales to customers in a specific sector becomes larger relative to other sectors, we will become increasingly dependent upon the economic and business conditions affecting that sector.

          In the current economic environment, we are seeing increased merger and acquisition activity that has impacted our customers. Specifically, two of our customers were acquired in the first quarter of fiscal 2010. Our production for these two customers is ramping down during the first half of fiscal 2011 and full disengagement is expected. One of the customers, which generated approximately $89.0 million of revenue in fiscal 2010, has communicated that they plan to disengage from Plexus by the end of the first quarter of fiscal 2011; actual revenue in fiscal 2011 with this customer may vary based on the success and speed of their planned transition. The other customer, which generated approximately $72.0 million of revenue in fiscal 2010, has communicated plans to disengage over a period of multiple quarters and we are currently forecasting some level of revenue with this customer through fiscal 2012.

          Gross profit. Gross profit and gross margin for the indicated periods were as follows (dollars in millions):

		Fiscal years ended								Variance				Fiscal years ended								Variance
		October 2,				October 3,				Increase/				October 3,				September 27,				Increase/
		2010				2009				(Decrease)				2009				2008				(Decrease)
Gross Profit		$	206.9			$	154.8			$	52.1     33.7%			$	154.8			$	205.8			$	(51.0)     (24.8	)%
Gross Margin			10.3	%			9.6	%							9.6	%			11.2	%

     For fiscal 2010, gross profit and gross margin were impacted by the following factors:

	•		increased net sales in all of our reportable segments, driven by strong end-market conditions, as well as the addition of new customers in the wireless infrastructure, wireline/networking, industrial/commercial and medical sectors, as well as favorable changes in customer mix, which together accounted for approximately 75 percent of the increase in gross profit
	•		increased capacity utilization from the higher revenue levels
	•		proceeds of $3.2 million received from a litigation settlement, which was recorded as a reduction to cost of sales, and
	•		partially offset by increased variable compensation expense of approximately $6.6 million as a result of improved financial performance and fixed expenses, primarily in the United States and Asia reportable segments, due to higher headcount to support the revenue growth.

     For fiscal 2009, gross profit and gross margin were impacted by the following factors:

	•		decreased net sales in three of our four reportable segments (U.S., Mexico and Europe), particularly related to our largest customer, an unnamed defense customer and another significant customer as well as unfavorable changes in customer mix, which together accounted for approximately 88 percent of the decrease in gross profit
	•		increased costs related to sites not operating at full capacity, including sites in China, Romania, Mexico, and Wisconsin; this accounted for approximately 8 percent of the decrease, and
	•		a decrease in our variable incentive compensation expense, which offset the overall decrease in gross profit by approximately 12 percent.

          Gross margins reflect a number of factors that can vary from period to period, including product and service mix, the level of new facility start-up costs, inefficiencies resulting from the transition of new programs, product life cycles, sales volumes, price reductions, overall capacity utilization, labor costs and efficiencies, the management of inventories, component pricing and shortages, fluctuations and timing of customer orders, changing demand for our customers’ products and competition within the electronics industry. We are currently in a constrained supply environment, which has caused, and may continue to cause, periods of parts shortages and delays for some components, based on lack of capacity at some of our suppliers to meet increased demand from the gradually improving economic outlook. These shortages and delays could negatively impact net sales, inventory levels, component costs and margin. Additionally, turnkey manufacturing involves the risk of inventory management, and a change in component costs can directly impact average selling prices, gross margins and net sales. Although we focus on maintaining gross margins, there can be no assurance that gross margins will not decrease in future periods.

          Design work performed by the Company is not the proprietary property of Plexus and substantially all costs incurred with this work are considered reimbursable by our customers. We do not track research and development costs that are not reimbursed by our customers and we consider these amounts immaterial.

          Operating expenses. Selling and administrative (“S&A”) expenses for the indicated periods were as follows (dollars in millions):

		Fiscal years ended								Variance				Fiscal years ended								Variance
		October 2,				October 3,				Increase/				October 3,				September 27,				Increase/
		2010				2009				(Decrease)				2009				2008				(Decrease)
S&A		$	107.3			$	93.1			$	14.2     15.3	%		$	93.1			$	100.8			$	(7.7)     (7.6	)%
Percent of net sales			5.3	%			5.8	%							5.8	%			5.5	%

          For fiscal 2010, sixty percent of the increase in S&A was due to higher variable incentive compensation expense as a result of strong financial performance. The remainder of the increase was driven primarily by an increase in headcount to support our revenue growth. S&A as a percentage of net sales decreased during fiscal 2010 as a result of net revenue expanding more quickly than these cost increases.

          Seventy percent of the decrease in S&A for fiscal 2009 was due to lower variable incentive compensation expense. In addition, savings from various other cost cutting measures were partially offset by additional expenses related to expansions in China and Romania. S&A as a percentage of net sales increased because these costs did not decline as quickly as net sales did in fiscal 2009.

          Restructuring and asset impairment charges. Our restructuring and asset impairment costs for fiscal 2010, 2009 and 2008 were as follows (dollars in millions):

		Fiscal years ended
		October 2,				October 3,				September 27,
		2010				2009				2008
Goodwill impairment			$          -				$      5.7				$          -
Severance costs			-				2.0				2.1
Adjustments to lease exit costs/other			-				0.9				-
Total restructuring and asset impairment charges			$          -				$      8.6				$      2.1

          The restructuring and asset impairment charges were associated with various reportable segments. Management excludes such charges when analyzing the performance of the reportable segments. See Note 13 in Notes to Consolidated Financial Statements for certain financial information regarding our reportable segments, including a summary of restructuring and asset impairment charges by reportable segment.

          Fiscal 2010 restructuring and asset impairment charges: For fiscal 2010, we did not incur any restructuring or asset impairment charges.

          Fiscal 2009 restructuring and asset impairment charges: For fiscal 2009, we recorded pre-tax restructuring and asset impairment charges of $8.6 million, related to goodwill impairment in our Europe reportable segment, the closure of our Ayer facility and the reduction of our workforce across our facilities in the United States and Juarez. The details of these fiscal 2009 restructuring actions are listed below.

          Goodwill Impairment: During the second quarter of fiscal 2009, the Company recorded a goodwill impairment charge of $5.7 million, writing off the entire carrying value of our goodwill related to our Kelso facility. The impairment charge was driven by macroeconomic conditions that contributed to an overall reduction in demand for the Company’s offerings from the Kelso facility. These conditions led to an “interim triggering event”, leading management to perform an interim goodwill impairment test. This test resulted in the determination that the carrying value of the goodwill relating to Kelso was fully impaired and therefore an impairment charge of $5.7 million was recorded.

          Ayer Facility Closure: During the third quarter of fiscal 2009, we closed our Ayer facility. In fiscal 2009, we recorded pre-tax restructuring charges of $0.4 million, related to the disposal of certain assets and costs to exit this leased facility.

          Other Restructuring Costs. In fiscal 2009, we recorded pre-tax restructuring costs of $2.0 million related to severance at facilities in the United States and Juarez. These workforce reductions affected approximately 450 employees. We also recorded approximately $0.5 million of asset impairment charges at Corporate.

          Other income (expense). Other income (expense) for the indicated periods were as follows (dollars in millions):

		Fiscal years ended								Variance				Fiscal years ended								Variance
		October 2,				October 3,				Increase/				October 3,				September 27,				Increase/
		2010				2009				(Decrease)				2009				2008				(Decrease)
Other income (expense)		$	(9.2	)		$	(7.7	)		$	1.5     19.5	%		$	(7.7	)		$	(0.2	)		$	7.5    3,750.0	%
Percent of net sales			(0.5	)%			(0.5	)%							(0.5	)%			0.0	%

          Other income (expense) for fiscal 2010 increased $1.5 million, to $9.2 million of expense from $7.7 million of expense in fiscal 2009. This change was driven by the unfavorable fluctuation in foreign currency translation and transaction adjustments of $2.1 million and reduced interest income of $0.9 million due to lower effective interest rates, partially offset by decreased interest expense of $1.3 million, primarily related to servicing the $150 million term loan drawn in April 2008.

          Other income (expense) for fiscal 2009 increased $7.5 million, to $7.7 million of expense from $0.2 million of expense in fiscal 2008. This change was driven by reduced interest income of $5.4 million due to lower effective interest rates and increased interest expense of $4.3 million, primarily related to servicing the $150 million term loan drawn in April 2008. Miscellaneous income (expense) fluctuated favorably due primarily to foreign currency translation and transaction adjustments.

          Income taxes. Income taxes for the indicated periods were as follows (dollars in millions):

		Fiscal years ended
		October 2,				October 3,				September 27,
		2010				2009				2008
Income tax expense (benefit)		$	0.9			$	(0.9	)		$	18.5
Effective annual tax rate (benefit)			1.0	%			(2.0	)%			18.0	%

          The change in our effective tax rate from fiscal 2008 to fiscal 2010 is primarily due to a higher proportion of income in Malaysia and Xiamen, China, where we currently have reduced tax rates due to tax holidays that extend through 2019 and 2013, respectively. We received approval from the Malaysian Investment Development Authority to extend the tax holiday in Malaysia for a period of five years through December 31, 2024, subject to certain conditions.

          As a result of using the with-and-without method under the requirements for accounting for stock based compensation, the Company recorded a valuation allowance for state taxes against the amount of net operating loss and credit carryforwards related to tax deductions in excess of compensation expense for stock options until such time as the related deductions actually reduce income taxes payable. During fiscal 2008 and 2009, the Company realized a reduction of its state income taxes payable from state net operating loss carryforwards. Consequently, we reversed approximately $0.1 million and $0.6 million of this valuation allowance with corresponding credits to additional paid in capital in fiscal years 2009 and 2008, respectively. As a result, we had a remaining valuation allowance of approximately $1.0 million related to tax deductions associated with stock-based compensation as of October 2, 2010.

          In addition, there was a remaining valuation allowance of $1.5 million as of September 27, 2008, related to various state deferred income tax assets for which utilization was uncertain due to a lack of sustained profitability and limited carryforward periods in those states. During fiscal 2009, we added $0.1 million of valuation allowance primarily related to changes in state laws. There was no change in the valuation allowance during fiscal 2010; therefore, we had a remaining valuation allowance of approximately $1.6 million as of October 2, 2010, related to state deferred income tax assets. If the US operations continue to generate losses, there may be a need to provide a valuation allowance on our net US deferred tax assets.

          We currently expect the annual effective tax rate for fiscal 2011 to be approximately three to five percent. China and Mexico passed new tax laws that were effective on January 1, 2008. Also, on November 1, 2009, Mexico adopted tax reform legislation that took effect on January 1, 2010 and provides for a temporary increase in its income tax and value added tax rates from 28% to 30% and 15% to 16%, respectively, along with certain other changes. These new laws did not materially impact our overall effective income tax rate in fiscal 2010 or 2009, but may result in a higher effective tax rate on our operations in future periods. On November 5, 2009, the United States adopted the “Worker, Homeownership, and Business Assistance Act of 2009”, which provides for an increase in the net operating loss carryback period from two years to five years for tax periods beginning or ending in calendar years 2008 and 2009, along with certain other tax law changes. This law did not have a material impact on our effective tax rate in fiscal 2010 and we do not currently believe that it will create a material impact on our effective income tax rate in future periods.

          Net Income. As a result of the above factors, our net income increased by $43.2 million, or 93.3 percent, in fiscal 2010 as compared to fiscal 2009. Diluted earnings per share increased by 87.2 percent. Net income decreased by $37.8 million, or 44.9 percent, in fiscal 2009 compared to fiscal 2008; diluted earnings per share decreased 39.1 percent.

LIQUIDITY AND CAPITAL RESOURCES

          Cash flows provided by operating activities were $2.0 million for fiscal 2010, compared to cash flows provided by operating activities of $170.3 million and $64.2 million for fiscal 2009 and 2008, respectively. During fiscal 2010, cash flows provided by operating activities were primarily a result of increased accounts payable as well as earnings after adjusting for the non-cash effects of depreciation and amortization expense, stock-based compensation expense and deferred income taxes, offset in part by increased inventory and accounts receivable.

          Inventory dollars increased by $170.0 million during fiscal 2010 as compared to fiscal 2009. Inventory turns decreased to 4.1 turns in fiscal 2010 from 4.4 turns in fiscal 2009. Days in inventory changed unfavorably as of October 2, 2010 to 90 days as compared to 83 days at October 3, 2009. The increase in inventory, both in dollars and

days of cash cycle, was the result of additional inventory to support year over year growth and customer demand volatility during the economic recovery. The industry also experienced parts shortages, extended lead times and allocations (as described more fully in “Risk Factors” in Part I, Item IA herein), which increased the amount of inventory that we agreed to hold at the request of our customers to enhance their ability to respond to their end markets and meet customer demand. As part of our continued efforts to mitigate inventory risk, we have collected approximately $25.8 million in cash deposits from our customers, which are classified as customer deposits on the Consolidated Balance Sheets, and have also continued to work with customers that have excess inventory issues in accordance with contractual obligations.

          The overall increase in accounts receivable of $118.0 million during fiscal 2010 as compared to fiscal 2009 was mainly due to increased net sales. Other factors contributing to the increase in accounts receivable were unfavorable changes in customer terms for a customer in each of the wireline/networking and medical sectors as well as an wireline/networking customer that prepaid for its accounts in fiscal 2009 but elected not to do so in fiscal 2010. Our annualized days sales outstanding in accounts receivable for fiscal 2010 increased unfavorably from 45 days in fiscal 2009 to 51 days in fiscal 2010.

          Cash flows used in investing activities totaled $74.4 million for fiscal 2010. The primary investments included $74.7 million for purchases of property, plant and equipment, mainly in the United States and Asia to support customer demand in those regions and for the construction of a new headquarters facility in Neenah, Wisconsin. See Note 13 in Notes to Consolidated Financial Statements for further information regarding our capital expenditures by reportable segment. Fiscal 2010 purchases of property, plant and equipment included $37.9 million, $30.9 million, $4.0 million and $1.9 million related to our Asia, U.S., Mexico and Europe reportable segments, respectively.

          On July 1, 2010, the Company entered into an agreement to purchase state leasehold land in Penang, Malaysia for approximately $9.0 million, subject to various purchase contingencies. The Company began construction of an additional manufacturing facility on the land during early fiscal 2011.

          We utilized available cash and operating cash flows as the principal sources for funding our operating requirements during fiscal 2010. We currently estimate capital expenditures for fiscal 2011 to be approximately $100 million. A significant portion of the fiscal 2011 capital expenditures is anticipated to be used for the construction of a new manufacturing facility in Penang, Malaysia. We also anticipate beginning construction of facilities in Romania and China in fiscal 2011.

          Cash flows provided by financing activities totaled $2.3 million for fiscal 2010, primarily due to proceeds from the exercise of stock options, offset by the payments on our term note and capital leases.

          In February 2010, the Company negotiated the settlement of a capital lease in Kelso, Scotland. The termination of this capital lease obligation and acquisition of the property was effected through a cash payment by Plexus of $3.9 million.

          The Company did not repurchase any shares in either fiscal 2010 or fiscal 2009.

          On April 4, 2008, we entered into our credit agreement (the “Credit Facility”) with a group of banks which allows us to borrow $150 million in term loans and $100 million in revolving loans. The $150 million in term loans was immediately funded and the $100 million revolving credit facility is currently available. The Credit Facility is unsecured and may be increased by an additional $100 million (the “accordion feature”) if we have not previously terminated all or any portion of the Credit Facility, there is no event of default existing under the credit agreement and both we and the administrative agent consent to the increase. The Credit Facility expires on April 4, 2013. Borrowings under the Credit Facility may be either through term loans or revolving or swing loans or letter of credit obligations. As of October 2, 2010, we had term loan borrowings of $112.5 million outstanding and no revolving borrowings under the Credit Facility.

          The Credit Facility contains certain financial covenants, which include a maximum total leverage ratio, maximum value of fixed rentals and operating lease obligations, a minimum interest coverage ratio and a minimum net worth test, all as defined in the agreement. As of October 2, 2010, we were in compliance with all debt covenants. If we incur an event of default, as defined in the Credit Facility (including any failure to comply with a financial covenant), the group of banks has the right to terminate the Credit Facility and all other obligations, and demand immediate repayment of all outstanding sums (principal and accrued interest). The interest rate on the borrowing varies depending upon our then-current total leverage ratio; as of October 2, 2010, the Company could elect to pay interest at a defined base rate or the LIBOR rate plus 1.00%. Rates would increase upon negative changes in specified Company financial metrics and would decrease upon reduction in the current total leverage ratio to no less than LIBOR plus

1.00%. We are also required to pay an annual commitment fee on the unused credit commitment based on our leverage ratio; the current fee is 0.25%. Unless the accordion feature is exercised, this fee applies only to the initial $100 million of availability (excluding the $150 million of term borrowings). Origination fees and expenses associated with the Credit Facility totaled approximately $1.3 million and have been deferred. These origination fees and expenses will be amortized over the five-year term of the Credit Facility. Quarterly principal repayments on the term loan of $3.75 million each began June 30, 2008, and end on April 4, 2013, with a final balloon repayment of $75.0 million.

          The Credit Facility allows for the future payment of cash dividends or the future repurchases of shares provided that no event of default (including any failure to comply with a financial covenant) exists at the time of, or would be caused by, the dividend payment or the share repurchases.

          In June 2008, the Company entered into three interest rate swap contracts related to the $150 million in term loans under the Credit Facility that had an initial notional value of $150 million and mature on April 4, 2013. The total fair value of these interest rate swap contracts was $9.0 million as of October 2, 2010. As of October 2, 2010, the total combined notional amount of the Company’s three interest rate swaps was $112.5 million.

          Our Malaysian operations have entered into forward exchange contracts on a rolling basis with a total notional value of $42.0 million as of October 2, 2010. These forward contracts will fix the exchange rates on foreign currency cash used to pay a portion of our local currency expenses. The changes in the fair value of the forward contracts are recorded in “Accumulated other comprehensive income” on the accompanying Condensed Balance Sheets until earnings are affected by the variability of cash flows. The total fair value of the forward contracts was $2.6 million at October 2, 2010.

          As of October 2, 2010, we held $2.0 million of auction rate securities maturing on March 17, 2042, which were classified as “other” long-term assets and whose underlying assets are in guaranteed student loans that are backed by a U. S. government agency. If the credit quality deteriorates for these adjustable rate securities, we may in the future be required to record an impairment charge on these investments. We believe that these securities are marketable and could be sold if we elected to do so.

          Based on current expectations, we believe that our projected cash flows from operations, available cash and short-term investments, the Credit Facility, and our leasing capabilities should be sufficient to meet our working capital and fixed capital requirements for the next twelve months. $100 million of committed credit is currently available under the Credit Facility, with another $100 million available in an “accordion” facility, which is contingent upon compliance with the Credit Agreement and lender approval. If our future financing needs increase, we may need to arrange additional debt or equity financing. Accordingly, we evaluate and consider from time to time various financing alternatives to supplement our financial resources. However, particularly due to the current instability of the credit and financial markets, we cannot be certain that we will be able to make any such arrangements on acceptable terms.

          We have not paid cash dividends in the past and do not currently anticipate paying them in the future. However, the Company evaluates from time to time potential uses of excess cash, which in the future may include share repurchases, a special dividend or recurring dividends.

FACILITY CLOSURES/EXPANSIONS

          In October 2010, we announced our plans to construct a manufacturing facility in Oradea, Romania which will provide approximately 160,000 to 215,000 square feet of manufacturing space and replace the 20,000 square foot facility that we currently lease. The Company anticipates beginning construction during fiscal 2011. We began manufacturing in our current facility in the fourth quarter of fiscal 2009.

          In October 2010, we entered into an agreement to purchase land in Xiamen, China, and anticipate beginning construction of a new manufacturing facility during fiscal 2011.

          In July 2010, we entered into an agreement to purchase state leasehold land in Penang, Malaysia, for $9.0 million, subject to various purchase contingencies. The Company began construction of an additional manufacturing facility on this land during early fiscal 2011.

          In fiscal 2010, we completed the construction of a new corporate headquarters office facility in Neenah, Wisconsin, which has approximately 104,000 square feet. This building consolidated corporate employees from four buildings into one location and included the exit of two leased facilities. We began occupancy of this facility in the

third quarter of fiscal 2010. The building is owned by Plexus and located on a parcel of real estate on which Plexus has a ground lease with an option to purchase. The previous headquarters facility in Neenah, Wisconsin continues to be utilized primarily for engineering operations.

          In February 2010, the Company negotiated the settlement of a capital lease in Kelso, Scotland. The termination of this capital lease obligation and acquisition of the property was executed through a cash payment of $3.9 million.

          In early fiscal 2009, we purchased a second manufacturing facility in Appleton, Wisconsin. The new facility provided an additional 205,000 square feet of manufacturing space. We began manufacturing in this facility in the second half of fiscal 2009.

          In April 2009, we closed our Ayer, Massachusetts manufacturing facility and transitioned the customer programs to other facilities in our organization. This decision was the result of our proactive strategic planning process which determined that the Ayer facility was not strategically aligned with our future growth prospects and we could provide greater value to its customers by providing services at other Plexus locations.

REPORTABLE SEGMENTS

          A further discussion of our fiscal 2010 and 2009 financial performance by reportable segment is presented below (dollars in millions):

		Fiscal years ended
		October 2,				October 3,				September 27,
		2010				2009				2008
Net sales:
United States		$	1,150.2			$	1,007.1			$	1,267.9
Asia			925.4				588.1				574.1
Mexico			94.5				77.2				78.3
Europe			72.5				55.6				68.8
Elimination of inter-segment sales			(229.2	)			(111.4	)			(147.5	)
		$	2,013.4			$	1,616.6			$	1,841.6
Operating income (loss):
United States		$	74.2			$	64.7			$	116.1
Asia			114.8				63.7				59.5
Mexico			0.2				(3.5	)			(2.7	)
Europe			(1.8	)			1.4				7.3
Corporate and other costs			(87.7	)			(73.2	)			(77.4	)
		$	99.7			$	53.1			$	102.8

United States:

Net sales for fiscal 2010 increased $143.1 million, or 14.2 percent, from fiscal 2009. This increase reflected higher end-market demand from numerous existing customers in each of our market sectors and demand from new customers in the wireline/networking, wireless infrastructure, and medical sectors. These increases were offset by reduced net sales to our largest customer, Juniper, due to the transfer of manufacturing of some products to our Asia reportable segment as well as decreased end-market demand for the mix of Juniper products produced by us. Operating income for fiscal 2010 increased $9.5 million from fiscal 2009 primarily as a result of higher revenues from the customers noted above, improved operating efficiencies resulting from higher production levels and proceeds received from a litigation settlement.

Net sales for fiscal 2009 decreased $260.8 million, or 20.6 percent, from fiscal 2008. This decline reflected lower demand, mainly from our unnamed defense/security/aerospace customer, and the transfer of production for Juniper product to our Asia reportable segment as well as the decrease in the demand from this customer due to lower end-market demand. Operating income for fiscal 2009 decreased $51.4 million from fiscal 2008 primarily as a result of decreased sales and unfavorable changes in customer mix, particularly related to our unnamed defense customer.

Asia:

Net sales for fiscal 2010 increased $337.3 million, or 57.4 percent, over fiscal 2009. This growth reflected higher net sales to multiple customers across our market sectors, increased demand from a new customer in the industrial/commercial sector and the transfer of the manufacturing of some Juniper products to the Asia reportable segment from the United States reportable segment, partially offset by the decrease in demand from Juniper described above. Operating income improved $51.1 million in fiscal 2010 as compared to fiscal 2009, primarily as a result of the net sales growth and operating efficiencies resulting from higher production levels.

Net sales for fiscal 2009 increased $14.0 million, or 2.4 percent, over fiscal 2008. This growth reflected increased net sales to multiple customers, with the most significant customer growth coming from the transfer of production of Juniper product from the United States reportable segment to the Asia reportable segment as well as increased demand from another customer in the wireline/networking sector and a customer in the medical sector. Operating income improved $4.2 million in fiscal 2009 as compared to fiscal 2008, primarily as a result of higher net sales and operating efficiencies resulting from higher production levels.

Mexico:

Net sales for fiscal 2010 increased $17.3 million, or 22.4 percent, from fiscal 2009. The net sales increase was primarily driven by higher end-market demand for existing customer programs in the industrial/commercial and wireline/networking sectors and the ramp of production for one existing customer in the industrial/commercial sector, offset by the disengagement of a wireline/networking customer. Operating results for the current year improved due to higher net sales volume.

Net sales for fiscal 2009 decreased $1.1 million, or 1.4 percent, from fiscal 2008. The net sales decrease was primarily driven by decreased demand from multiple customers across sectors due to lower end-market demand, offset by increased demand from a new program in the industrial/commercial sector. Operating loss increased from $2.7 million in fiscal 2008 to $3.5 million in fiscal 2009 as a result of decreased sales and an unfavorable change in customer mix.

Europe:

Net sales for fiscal 2010 increased $16.9 million, or 30.4 percent, from fiscal 2009. The change in net sales can be attributed to higher demand from the ramp of production for two existing customer programs in the industrial/commercial sector. Operating results were lower in the current year as compared to the prior year due to operating costs from our new Romania facility.

Net sales for fiscal 2009 decreased $13.2 million, or 19.2 percent, from fiscal 2008. The change in net sales can be attributed to a decrease in exchange rates as well as decreased demand due to lower end-market demand from one customer in the industrial/commercial sector. Operating income decreased $5.9 million to $1.4 million for fiscal 2009 as compared to fiscal 2008, primarily as a result of decreased net sales, start-up costs associated with our Oradea, Romania facility and unfavorable changes in customer mix.

          For our significant customers, we generally manufacture products in more than one location. Net sales to Juniper, our largest customer, occur in the United States and Asia. See Note 13 in Notes to Consolidated Financial Statements for certain financial information regarding our reportable segments, including a detail of net sales by reportable segment.

CONTRACTUAL OBLIGATIONS, COMMITMENTS AND OFF-BALANCE SHEET OBLIGATIONS

          Our disclosures regarding contractual obligations and commercial commitments are located in various parts of our regulatory filings. Information in the following table provides a summary of our contractual obligations and commercial commitments as of October 2, 2010 (dollars in millions):

	Payments Due by Fiscal Year
																		2016 and
Contractual Obligations	Total					2011				2012-2013				2014-2015				thereafter
Long-Term Debt Obligations (1)		$	126.1			$	21.0			$	105.1			$	-			$	-
Capital Lease Obligations			23.3				4.1				7.7				7.9				3.6
Operating Lease Obligations			40.4				8.6				15.1				10.7				6.0
Purchase Obligations (2)			470.1				466.2				3.3				-				0.6
Other Long-Term Liabilities on the Balance Sheet (3)			8.8				0.9				1.4				1.4				5.1
Other Long-Term Liabilities not on the Balance Sheet (4)			5.1				3.3				1.8				-				-
Total Contractual Cash Obligations		$	673.8			$	504.1			$	134.4			$	20.0			$	15.3

1)		As of April 4, 2008, we entered into the Credit Facility and immediately funded a term loan for $150 million. As of October 2, 2010, the outstanding balance was $112.5 million. See Note 4 in Notes to Consolidated Financial Statements for further information.
2)		As of October 2, 2010, purchase obligations consist of purchases of inventory and equipment in the ordinary course of business.
3)		As of October 2, 2010, other long-term obligations on the balance sheet included deferred compensation obligations to certain of our former and current executive officers, as well as other key employees, and an asset retirement obligation. We have excluded from the above table the impact of approximately $5.9 million, as of October 2, 2010, related to unrecognized income tax benefits. The Company cannot make reliable estimates of the future cash flows by period related to this obligation.
4)		As of October 2, 2010, other long-term obligations not on the balance sheet consisted of a commitment for salary continuation in the event employment of one executive officer of the Company is terminated without cause as well as a subsequent commitment for approximately $2.4 million to acquire land in Xiamen, China. We did not have, and were not subject to, any lines of credit, standby letters of credit, guarantees, standby repurchase obligations, other off-balance sheet arrangements or other commercial commitments that are material.

DISCLOSURE ABOUT CRITICAL ACCOUNTING POLICIES

          Our accounting policies are disclosed in Note 1 of Notes to the Consolidated Financial Statements. During fiscal 2010, there were no material changes to these policies. Our more critical accounting policies are noted below:

          Stock-Based Compensation – The Financial Accounting Standard Board (“FASB”) requires all share-based payments to employees, including grants of employee stock options, to be measured at fair value and expensed in the consolidated statements of operations over the service period (generally the vesting period) of the grant. We used the modified prospective application, under which compensation expense is only recognized in the consolidated statements of operations beginning with the first period that we adopted the FASB regulation and continuing to be expensed thereafter. We continue to use the Black-Scholes valuation model to value stock options. See Note 1 in Notes to Consolidated Financial Statements for further information.

          Impairment of Long-Lived Assets – We review property, plant and equipment for impairment whenever events or changes in circumstances indicate that the carrying amount of an asset may not be recoverable. Recoverability of property, plant and equipment is measured by comparing its carrying value to the projected cash flows the property, plant and equipment are expected to generate. If such assets are considered to be impaired, the impairment to be recognized is measured as the amount by which the carrying value of the property exceeds its fair market value. The impairment analysis is based on management’s assumptions, including future revenue and cash flow projections.

Circumstances that may lead to impairment of property, plant and equipment include reduced expectations for future performance or industry demand and possible further restructurings.

          Intangible Assets – During the second quarter of fiscal 2009, we recorded a goodwill impairment charge of $5.7 million, related to the Company’s sole goodwill asset. The impairment wrote off the entire carrying value of our goodwill related to our Kelso facility, which was the sole reporting unit in the Europe reportable segment. The impairment charge was driven by adverse macroeconomic conditions that contributed to an overall reduction in demand for the Company’s offerings from the Kelso facility. These conditions led to an “interim triggering event”, leading management to perform an interim goodwill impairment test. This test resulted in the determination that the carrying value of the goodwill relating to Kelso was fully impaired and therefore an impairment charge of $5.7 million was taken.

          Should we have goodwill and intangible assets with indefinite useful lives in the future, we would test those assets for impairment, at least annually, and recognize any related losses when incurred.

          Revenue – Net sales from manufacturing services are recognized when the product has been shipped, the risk of ownership has transferred to the customer, the price to the buyer is fixed or determinable, and recoverability is reasonably assured. This point depends on contractual terms and generally occurs upon shipment of the goods from Plexus. Generally, there are no formal customer acceptance requirements or further obligations related to manufacturing services; if such requirements or obligations exist, then a sale is recognized at the time when such requirements are completed and such obligations fulfilled.

          Net sales from engineering design and development services, which are generally performed under contracts with durations of twelve months or less, are typically recognized as costs are incurred utilizing the proportional performance model. The completed performance model is used if certain customer acceptance criteria exist. Any losses are recognized when anticipated.

          Sales are recorded net of estimated returns of manufactured product based on management’s analysis of historical rates of returns, current economic trends and changes in customer demand. Net sales also include amounts billed to customers for shipping and handling, if applicable. The corresponding shipping and handling costs are included in cost of sales.

          Derivatives and Hedging Activities – All derivatives are recognized on the balance sheet at their estimated fair value. On the date a derivative contract is entered into, the Company designates the derivative as a hedge of a recognized asset or liability (a “fair value” hedge), a hedge of a forecasted transaction or of the variability of cash flows to be received or paid related to a recognized asset or liability (a “cash flow” hedge), or a hedge of the net investment in a foreign operation. The Company does not enter into derivatives for speculative purposes. Changes in the fair value of a derivative that qualify as a fair value hedge are recorded in earnings along with the gain or loss on the hedged asset or liability. Changes in the fair value of a derivative that qualifies as a cash flow hedge are recorded in “Accumulated other comprehensive income”, until earnings are affected by the variability of cash flows. Changes in the fair value of a derivative used to hedge the net investment in a foreign operation are recorded in the “Accumulated other comprehensive income” accounts within shareholders’ equity.

          In June 2008, the Company entered into three interest rate swap contracts related to the $150 million in term loans under the Credit Facility that had an initial total notional value of $150 million and mature on April 4, 2013. These interest rate swap contracts will pay the Company variable interest at the three month LIBOR rate, and the Company will pay the counterparties a fixed interest rate. The fixed interest rates for each of these contracts are 4.415%, 4.490% and 4.435%, respectively. These interest rate swap contracts were entered into to convert $150 million of the variable rate term loan under the Credit Facility into fixed rate debt. Based on the terms of the interest rate swap contracts and the underlying debt, these interest rate contracts were determined to be effective, and thus qualify as a cash flow hedge. As such, any changes in the fair value of these interest rate swaps are recorded in “Accumulated other comprehensive income” on the accompanying Consolidated Balance Sheets until earnings are affected by the variability of cash flows. Any gain or loss on the derivatives will be recorded in the income statement in “Interest expense”. The total fair value of these interest rate swap contracts was $9.0 million and $9.3 million at October 2, 2010 and October 3, 2009, respectively.

          The Company’s Malaysian operations have entered into forward exchange contracts on a rolling basis with a total notional value of $42.0 million as of October 2, 2010. These forward contracts fix the foreign exchange rates on foreign currency cash used to pay a portion of local currency expenses. The changes in the fair value of the forward contracts are recorded in “Accumulated other comprehensive income” on the accompanying Consolidated Balance

Sheets until earnings are affected by the variability of cash flows. The total fair value of the forward contracts was $2.6 million at October 2, 2010.

          Income Taxes – Deferred income taxes are provided for differences between the bases of assets and liabilities for financial and income tax reporting purposes. We record a valuation allowance against deferred income tax assets when management believes it is more likely than not that some portion or all of the deferred income tax assets will not be realized. Realization of deferred income tax assets is dependent on our ability to generate sufficient future taxable income. Although our net deferred income tax assets as of October 2, 2010, still reflect a $1.6 million valuation allowance against certain deferred income tax assets, we may be able to utilize these deferred income tax assets to offset future taxable income in certain states. We also had a remaining valuation allowance of $1.0 million related to tax deductions associated with stock-based compensation as of October 2, 2010. If the U.S. operations continue to generate losses, there may be a need to provide a valuation allowance on our net U.S. deferred tax assets.

NEW ACCOUNTING PRONOUNCEMENTS

See Note 1 in Notes to Consolidated Financial Statements regarding recent accounting pronouncements.

ITEM 7A.		QUANTITATIVE AND QUALITATIVE DISCLOSURES ABOUT MARKET RISK

          We are exposed to market risk from changes in foreign exchange and interest rates. We selectively use financial instruments to reduce such risks.

Foreign Currency Risk

          We do not use derivative financial instruments for speculative purposes. Our policy is to selectively hedge our foreign currency denominated transactions in a manner that partially offsets the effects of changes in foreign currency exchange rates. We typically use foreign currency contracts to hedge only those currency exposures associated with certain assets and liabilities denominated in non-functional currencies. Corresponding gains and losses on the underlying transaction generally offset the gains and losses on these foreign currency hedges. Our international operations create potential foreign exchange risk. Beginning in July 2009, we entered into forward contracts to hedge a portion of our foreign currency denominated transactions in our Asia reportable segment, as described in Note 5 to Notes to Consolidated Financial Statements.

          Our percentages of transactions denominated in currencies other than the U.S. dollar for the indicated periods were as follows:

		Fiscal year
		2010				2009				2008
Net Sales			5	%			4	%			4	%
Total Costs			13	%			11	%			11	%

          The Company has evaluated the potential foreign currency exchange rate risk on transactions denominated in currencies other than the U.S. Dollar for the periods presented above. Based on the Company’s overall currency exposure, as of October 2, 2010, a 10 percent change in the value of the U.S. Dollar relative to our other transactional currencies would not have a material effect on the Company’s financial position, results of operations, or cash flows.

Interest Rate Risk

          We have financial instruments, including cash equivalents and short-term investments, which are sensitive to changes in interest rates. We consider the use of interest-rate swaps based on existing market conditions and have entered into interest rate swaps for $112.5 million in term loans as described in Note 5 in Notes to Consolidated Financial Statements. As with any agreement of this type, our interest rate swap agreements are subject to the further risk that the counterparties to these agreements may fail to comply with their obligations thereunder.

          The primary objective of our investment activities is to preserve principal, while maximizing yields without significantly increasing market risk. To achieve this, we maintain our portfolio of cash equivalents and short-term investments in a variety of highly rated securities, money market funds and certificates of deposit and limit the amount of principal exposure to any one issuer.

          Our only material interest rate risk is associated with our Credit Facility under which we borrowed $150 million on April 4, 2008. Through the use of interest rate swaps, as described above, we have fixed the basis on which we pay interest, thus eliminating much of our interest rate risk. A 10 percent change in the weighted average interest rate on our average long-term borrowings would have had only a nominal impact on net interest expense.

Auction Rate Securities

          As of October 2, 2010, we held $2.0 million of auction rate securities maturing on March 17, 2042, which were classified as long-term other assets and whose underlying assets are in guaranteed student loans backed by a U.S. government agency. If the credit quality deteriorates for these adjustable rate securities, we may in the future be required to record an impairment charge on these investments. The fair value of the auction rate securities approximates the carrying value of $2.0 million as of October 2, 2010. We believe that these securities are marketable and could be sold if we elected to do so.

ITEM 8.		FINANCIAL STATEMENTS AND SUPPLEMENTARY DATA

          See Part IV, Item 15 on page 38.

ITEM 9.		CHANGES IN AND DISAGREEMENTS WITH ACCOUNTANTS ON ACCOUNTING AND FINANCIAL DISCLOSURE

          None.

ITEM 9A.		CONTROLS AND PROCEDURES

          Disclosure Controls and Procedures: The Company maintains disclosure controls and procedures designed to ensure that the information the Company must disclose in its filings with the Securities and Exchange Commission (“SEC”) is recorded, processed, summarized and reported on a timely basis. The Company’s principal executive officer and principal financial officer have reviewed and evaluated, with the participation of the Company’s management, the Company’s disclosure controls and procedures as defined in Rules 13a-15(e) and 15d-15(e) under the Securities Exchange Act of 1934, as amended (the “Exchange Act”) as of the end of the period covered by this report (the “Evaluation Date”). Based on such evaluation, the chief executive officer and chief financial officer have concluded that, as of the Evaluation Date, the Company’s disclosure controls and procedures are effective (a) in recording, processing, summarizing and reporting, on a timely basis, information required to be disclosed by the Company in the reports the Company files or submits under the Exchange Act, and (b) in assuring that information is accumulated and communicated to the Company’s management, including the chief executive officer and chief financial officer, as appropriate to allow timely decisions regarding required disclosure.

          Management’s Annual Report on Internal Control Over Financial Reporting: Management of the Company is responsible for establishing and maintaining adequate internal control over financial reporting, as such term is defined in Exchange Act Rules 13a-15(f) and 15d-15(f). Management of the Company, including its chief executive officer and chief financial officer, has assessed the effectiveness of its internal control over financial reporting as of October 2, 2010, based on the criteria established in “Internal Control – Integrated Framework” issued by the Committee of Sponsoring Organizations of the Treadway Commission (“COSO”). Based on its assessment and those criteria, management of the Company has concluded that, as of October 2, 2010, the Company’s internal control over financial reporting was effective.

          The independent registered public accounting firm of PricewaterhouseCoopers LLP has audited the Company’s internal control over financial reporting as of October 2, 2010, as stated in their report included herein on page 40.

          Changes in Internal Control Over Financial Reporting: There have been no changes in the Company’s internal control over financial reporting (as defined in Rules 13a-15(f) and 15d-15(f) under the Exchange Act) that occurred during the Company’s most recent fiscal quarter that have materially affected, or are reasonably likely to materially affect, the Company’s internal control over financial reporting.

          Limitations on the Effectiveness of Controls: Our management, including our chief executive officer and chief financial officer, does not expect that our disclosure controls and internal controls will prevent all errors and all fraud. A control system, no matter how well conceived and operated, can provide only reasonable, not absolute, assurance that the objectives of the control system are met. Further, the design of a control system must reflect the fact that there are

resource constraints, and the benefits of controls must be considered relative to their costs. Because of the inherent limitations in all control systems, no evaluation of controls can provide absolute assurance that all control issues and instances of fraud, if any, within the Company have been detected. These inherent limitations include the realities that judgments in decision-making can be faulty, and that breakdowns can occur because of simple errors or mistakes. Additionally, controls can be circumvented by the individual acts of some persons, by collusion of two or more people, or by management override of the control. The design of any system of controls also is based in part upon certain assumptions about the likelihood of future events, and there can be no assurance that any design will succeed in achieving its stated goals under all potential future conditions; over time, a control may become inadequate because of changes in conditions, or the degree of compliance with the policies or procedures may deteriorate. Because of the inherent limitations in a cost-effective control system, misstatements due to error or fraud may occur and not be detected.

          Notwithstanding the foregoing limitations on the effectiveness of controls, we have nonetheless reached the conclusion that our disclosure controls and procedures and our internal control over financial reporting are effective at the reasonable assurance level.

ITEM 9B.		OTHER INFORMATION.

          None.

PART III

ITEM 10.		DIRECTORS, EXECUTIVE OFFICERS AND CORPORATE GOVERNANCE

          Information in response to this item is incorporated herein by reference to “Election of Directors” and “Corporate Governance” in the Company’s Proxy Statement for its 2011 Annual Meeting of Shareholders (“2011 Proxy Statement”) and “Executive Officers of the Registrant” in Part I hereof.

          Our Code of Conduct and Business Ethics is posted on our website at www.plexus.com. You may access the Code of Conduct and Business Ethics by following the links under “Investor Relations, Corporate Governance” at our website. Plexus’ Code of Conduct and Business Ethics applies to all members of the board of directors, officers and employees.

ITEM 11.		EXECUTIVE COMPENSATION

          Incorporated herein by reference to “Corporate Governance – Board Committees – Compensation and Leadership Development Committee,” “Corporate Governance – Directors’ Compensation,” “Compensation Discussion and Analysis,” “Executive Compensation” and “Compensation Committee Report” in the 2011 Proxy Statement.

ITEM 12.		SECURITY OWNERSHIP OF CERTAIN BENEFICIAL OWNERS AND MANAGEMENT AND RELATED STOCKHOLDER MATTERS

          Incorporated herein by reference to “Security Ownership of Certain Beneficial Owners and Management” and “Approval of the Amendment to, and Restatement of, the 2008 Long-Term Incentive Plan – Equity Compensation Plan Information” in the 2011 Proxy Statement.

ITEM 13.		CERTAIN RELATIONSHIPS AND RELATED TRANSACTIONS, AND DIRECTOR INDEPENDENCE

          Incorporated herein by reference to “Corporate Governance – Director Independence” and “Certain Transactions” in the 2011 Proxy Statement.

ITEM 14.		PRINCIPAL ACCOUNTING FEES AND SERVICES

          Incorporated herein by reference to the subheading “Auditors - Fees and Services” in the 2011 Proxy Statement.

PART IV

ITEM 15.		EXHIBITS, FINANCIAL STATEMENT SCHEDULES

	(a)		Documents filed
			Financial Statements and Financial Statement Schedule. See the following list of Financial Statements and Financial Statement Schedule on page 39.
	(b)		Exhibits. See Exhibit Index included as the last page of this report, which index is incorporated herein by reference.

PLEXUS CORP.
List of Financial Statements and Financial Statement Schedule
October 2, 2010

Contents		Pages
Report of Independent Registered Public Accounting Firm			40
Consolidated Financial Statements:
Consolidated Statements of Operations for the years ended October 2, 2010, October 3, 2009, and September 27, 2008			41
Consolidated Balance Sheets as of October 2, 2010 and October 3, 2009			42
Consolidated Statements of Shareholders’ Equity and Comprehensive Income for the years ended October 2, 2010, October 3, 2009, and September 27, 2008			43
Consolidated Statements of Cash Flows for the years ended October 2, 2010, October 3, 2009, and September 27, 2008			44
Notes to Consolidated Financial Statements			45
Financial Statement Schedule:
Schedule II - Valuation and Qualifying Accounts for the years ended October 2, 2010, October 3, 2009, and September 27, 2008			72

NOTE: All other financial statement schedules are omitted because they are not applicable or the required information is included in the Consolidated Financial Statements or notes thereto.

Report of Independent Registered Public Accounting Firm

To the Shareholders
and Board of Directors
of Plexus Corp.:

In our opinion, the consolidated financial statements listed in the accompanying index present fairly, in all material respects, the financial position of Plexus Corp. and its subsidiaries at October 2, 2010 and October 3, 2009, and the results of their operations and their cash flows for each of the three years in the period ended October 2, 2010 in conformity with accounting principles generally accepted in the United States of America. In addition, in our opinion, the financial statement schedule listed in the accompanying index presents fairly, in all material respects, the information set forth therein when read in conjunction with the related consolidated financial statements. Also in our opinion, the Company maintained, in all material respects, effective internal control over financial reporting as of October 2, 2010, based on criteria established in Internal Control - Integrated Framework issued by the Committee of Sponsoring Organizations of the Treadway Commission (COSO). The Company’s management is responsible for these financial statements and financial statement schedule, for maintaining effective internal control over financial reporting and for its assessment of the effectiveness of internal control over financial reporting, included in Management’s Annual Report on Internal Control Over Financial Reporting appearing under Item 9A. Our responsibility is to express opinions on these financial statements, on the financial statement schedule, and on the Company’s internal control over financial reporting based on our integrated audits. We conducted our audits in accordance with the standards of the Public Company Accounting Oversight Board (United States). Those standards require that we plan and perform the audits to obtain reasonable assurance about whether the financial statements are free of material misstatement and whether effective internal control over financial reporting was maintained in all material respects. Our audits of the financial statements included examining, on a test basis, evidence supporting the amounts and disclosures in the financial statements, assessing the accounting principles used and significant estimates made by management, and evaluating the overall financial statement presentation. Our audit of internal control over financial reporting included obtaining an understanding of internal control over financial reporting, assessing the risk that a material weakness exists, and testing and evaluating the design and operating effectiveness of internal control based on the assessed risk. Our audits also included performing such other procedures as we considered necessary in the circumstances. We believe that our audits provide a reasonable basis for our opinions.

A company’s internal control over financial reporting is a process designed to provide reasonable assurance regarding the reliability of financial reporting and the preparation of financial statements for external purposes in accordance with generally accepted accounting principles. A company’s internal control over financial reporting includes those policies and procedures that (i) pertain to the maintenance of records that, in reasonable detail, accurately and fairly reflect the transactions and dispositions of the assets of the company; (ii) provide reasonable assurance that transactions are recorded as necessary to permit preparation of financial statements in accordance with generally accepted accounting principles, and that receipts and expenditures of the company are being made only in accordance with authorizations of management and directors of the company; and (iii) provide reasonable assurance regarding prevention or timely detection of unauthorized acquisition, use, or disposition of the company’s assets that could have a material effect on the financial statements.

Because of its inherent limitations, internal control over financial reporting may not prevent or detect misstatements. Also, projections of any evaluation of effectiveness to future periods are subject to the risk that controls may become inadequate because of changes in conditions, or that the degree of compliance with the policies or procedures may deteriorate.

/s/ PricewaterhouseCoopers LLP
Milwaukee, Wisconsin
November 18, 2010

PLEXUS CORP. AND SUBSIDIARIES
CONSOLIDATED STATEMENTS OF OPERATIONS
for the fiscal years ended October 2, 2010, October 3, 2009, and September 27, 2008
(in thousands, except per share data)

		2010				2009				2008
Net sales		$	2,013,393			$	1,616,622			$	1,841,622
Cost of sales (Note 12)			1,806,471				1,461,846				1,635,861
Gross profit			206,922				154,776				205,761
Operating expenses:
Selling and administrative expenses			107,270				93,138				100,815
Goodwill impairment charges			-				5,748				-
Restructuring charges			-				2,823				2,119
			107,270				101,709				102,934
Operating income			99,652				53,067				102,827
Other income (expense):
Interest expense			(9,589	)			(10,875	)			(6,543	)
Interest income			1,436				2,323				7,661
Miscellaneous (expense) income			(1,062	)			904				(1,330	)
Income before income taxes			90,437				45,419				102,615
Income tax expense (benefit)			904				(908	)			18,471
Net income		$	89,533			$	46,327			$	84,144
Earnings per share:
Basic		$	2.24			$	1.18			$	1.94
Diluted		$	2.19			$	1.17			$	1.92
Weighted average shares outstanding:
Basic			40,051				39,411				43,340
Diluted			40,831				39,654				43,850

The accompanying notes are an integral part of these consolidated financial statements.

PLEXUS CORP. AND SUBSIDIARIES
CONSOLIDATED BALANCE SHEETS
as of October 2, 2010 and October 3, 2009
(in thousands, except per share data)

		2010				2009
ASSETS
Current assets:
Cash and cash equivalents		$	188,244			$	258,382
Accounts receivable, net of allowances of $1,400 and $1,000, respectively			311,205				193,222
Inventories			492,430				322,352
Deferred income taxes			18,959				15,057
Prepaid expenses and other			15,153				9,421
Total current assets			1,025,991				798,434
Property, plant and equipment, net			235,714				197,469
Deferred income taxes			11,787				10,305
Other			16,887				16,464
Total assets		$	1,290,379			$	1,022,672
LIABILITIES AND SHAREHOLDERS’ EQUITY
Current liabilities:
Current portion of long-term debt and capital lease obligations		$	17,409			$	16,907
Accounts payable			360,686				233,061
Customer deposits			27,301				28,180
Accrued liabilities:
Salaries and wages			46,639				28,169
Other			50,484				33,004
Total current liabilities			502,519				339,321
Long-term debt and capital lease obligations, net of current portion			112,466				133,163
Other liabilities			23,539				22,742
Total non-current liabilities			136,005				155,905
Commitments and contingencies			-				-
Shareholders’ equity:
Preferred stock, $.01 par value, 5,000 shares authorized, none issued or outstanding			-				-
Common stock, $.01 par value, 200,000 shares authorized, 47,849 and 46,994 shares issued, respectively, and 40,403 and 39,548 shares outstanding, respectively			478				470
Additional paid-in capital			399,054				366,371
Common stock held in treasury, at cost, 7,446 shares for both periods			(200,110	)			(200,110	)
Retained earnings			445,568				356,035
Accumulated other comprehensive income			6,865				4,680
			651,855				527,446
Total liabilities and shareholders’ equity		$	1,290,379			$	1,022,672

The accompanying notes are an integral part of these consolidated financial statements.

PLEXUS CORP. AND SUBSIDIARIES
CONSOLIDATED STATEMENTS OF SHAREHOLDERS’ EQUITY AND COMPREHENSIVE INCOME
for the fiscal years ended October 2, 2010, October 3, 2009, and September 27, 2008 (in thousands)

																						Accumulated
		Common Stock																				Other
										Additional				Treasury				Retained				Comprehensive
		Shares				Amount				Paid-In Capital				Stock				Earnings				Income (Loss)				Total
Balances, September 29, 2007			46,402			$	464			$	336,603			$	-			$	224,586			$	11,612			$	573,265
Comprehensive income:
Net income			-				-				-				-				84,144				-				84,144
Foreign currency translation adjustments			-				-				-				-				-				882				882
Change in fair market value of derivative instruments, net of tax			-				-				-				-				-				(1,720	)			(1,720	)
Total comprehensive income																											83,306
Adoption of Accounting for Uncertain Tax Positions			-				-				-				-				978				-				978
Treasury shares purchased			(7,446	)			-				-				(200,110	)			-				-				(200,110	)
Issuance of common stock under Employee Stock Purchase Plan			7				-				177				-				-				-				177
Stock based compensation expense			-				-				8,737				-				-				-				8,737
Exercise of stock options, including tax benefits			363				4				7,588				-				-				-				7,592
Balances, September 27, 2008			39,326				468				353,105				(200,110	)			309,708				10,774				473,945
Comprehensive income:
Net income			-				-				-				-				46,327				-				46,327
Foreign currency translation adjustments			-				-				-				-				-				(2,917	)			(2,917	)
Change in fair market value of derivative instruments, net of tax			-				-				-				-				-				(3,177	)			(3,177	)
Total comprehensive income																											40,233
Stock based compensation expense			-				-				9,421				-				-				-				9,421
Exercise of stock options, including tax benefits			222				2				3,845				-				-				-				3,847
Balances, October 3, 2009			39,548				470				366,371				(200,110	)			356,035				4,680				527,446
Comprehensive income:
Net income			-				-				-				-				89,533				-				89,533
Foreign currency translation adjustments			-				-				-				-				-				212				212
Change in fair market value of derivative instruments, net of tax			-				-				-				-				-				1,973				1,973
Total comprehensive income																											91,718
Stock based compensation expense			-				-				9,536				-				-				-				9,536
Exercise of stock options, including tax benefits			855				8				23,147				-				-				-				23,155
Balances, October 2, 2010			40,403			$	478			$	399,054			$	(200,110	)		$	445,568			$	6,865			$	651,855