UNITED STATES
SECURITIES AND EXCHANGE COMMISSION

Washington, D.C. 20549

FORM 10-Q

(Mark One)

þ		QUARTERLY REPORT PURSUANT TO SECTION 13 OR 15(d) OF THE SECURITIES EXCHANGE ACT OF 1934.

For the quarterly period ended March 31, 2006.

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

For the transition period from                      to                     .

Commission file number: 000-26966

ADVANCED ENERGY INDUSTRIES, INC.

(Exact name of registrant as specified in its charter)

Delaware		84-0846841
(State or other jurisdiction of incorporation or organization)		(I.R.S. Employer Identification No.)

1625 Sharp Point Drive, Fort Collins, CO		80525
(Address of principal executive offices)		(Zip Code)

Registrant’s telephone number, including area code: (970) 221-4670

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 þ No o.

Indicate by check mark whether the registrant is a large accelerated filer, an accelerated filer, or a non-accelerated filer. See definition of “accelerated filer and large accelerated filer” in Rule 12b-2 of the Exchange Act. (Check one):

                         Large accelerated filer o            Accelerated filer þ            Non-accelerated filer o

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

As of May 1, 2006, there were 44,663,620 shares of the registrant’s Common Stock, par value $0.001 per share, outstanding.

 

 

ADVANCED ENERGY INDUSTRIES, INC.
FORM 10-Q
TABLE OF CONTENTS

PART I FINANCIAL INFORMATION
ITEM 1.	UNAUDITED CONDENSED CONSOLIDATED FINANCIAL STATEMENTS
	Condensed Consolidated Balance Sheets — March 31, 2006 and December 31, 2005			3
	Condensed Consolidated Statements of Operations — Three months ended March 31, 2006 and 2005			4
	Condensed Consolidated Statements of Cash Flows — Three months ended March 31, 2006 and 2005			5
	Notes to Condensed Consolidated Financial Statements			6
ITEM 2.	MANAGEMENT’S DISCUSSION AND ANALYSIS OF FINANCIAL CONDITION AND RESULTS OF OPERATIONS			22
ITEM 3.	QUANTITATIVE AND QUALITATIVE DISCLOSURES ABOUT MARKET RISK			28
ITEM 4.	CONTROLS AND PROCEDURES			28
PART II OTHER INFORMATION
ITEM 1.	LEGAL PROCEEDINGS			29
ITEM 1A.	RISK FACTORS			29
ITEM 2.	UNREGISTERED SALES OF EQUITY SECURITIES AND USE OF PROCEEDS			37
ITEM 3.	DEFAULTS UPON SENIOR SECURITIES			37
ITEM 4.	SUBMISSION OF MATTERS TO A VOTE OF SECURITY HOLDERS			37
ITEM 5.	OTHER INFORMATION			37
ITEM 6.	EXHIBITS			37
SIGNATURE				38
Certification of CEO Pursuant to Section 302
Certification of CFO Pursuant to Section 302
Certification of CEO Pursuant to Section 906
Certification of CFO Pursuant to Section 906

PART I            FINANCIAL INFORMATION

ITEM 1. UNAUDITED CONDENSED CONSOLIDATED FINANCIAL STATEMENTS

ADVANCED ENERGY INDUSTRIES, INC. AND SUBSIDIARIES

Condensed Consolidated Balance Sheets (Unaudited)

		March 31,				December 31,
		2006				2005
ASSETS
CURRENT ASSETS:
Cash and cash equivalents		$	67,965			$	52,874
Marketable securities			8,815				6,811
Accounts receivable, net			72,240				68,992
Inventories			55,940				56,199
Other current assets			4,700				6,773
Total current assets			209,660				191,649
PROPERTY AND EQUIPMENT, net			37,502				39,294
OTHER ASSETS:
Deposits and other			1,877				3,808
Goodwill			61,621				61,316
Other intangible assets, net			8,095				8,527
Customer service equipment, net			1,848				2,407
Deferred income tax assets, net			5,059				3,116
Total assets		$	325,662			$	310,117
LIABILITIES AND STOCKHOLDERS’ EQUITY
CURRENT LIABILITIES:
Trade accounts payable		$	21,567			$	22,028
Accrued payroll and employee benefits			9,221				8,313
Taxes payable			6,175				5,538
Other accrued expenses			8,185				9,155
Customer deposits and deferred revenue			347				971
Senior borrowings and capital leases, current portion			1,601				2,011
Total current liabilities			47,096				48,016
LONG-TERM LIABILITIES:
Senior borrowings and capital leases, net of current portion			2,028				2,179
Other long-term liabilities			2,556				2,492
Total liabilities			51,680				52,687
Commitments and contingencies
STOCKHOLDERS’ EQUITY			273,982				257,430
Total liabilities and stockholders’ equity		$	325,662			$	310,117

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

ADVANCED ENERGY INDUSTRIES, INC. AND SUBSIDIARIES

Condensed Consolidated Statements of Operations (Unaudited)
(In thousands, except per share amounts)

		Three Months Ended March 31,
		2006				2005
SALES		$	93,950			$	82,176
COST OF SALES			55,400				54,854
Gross profit			38,550				27,322
OPERATING EXPENSES:
Research and development			10,459				10,255
Selling, general and administrative			14,882				13,272
Restructuring charges			29				1,262
Total operating expenses			25,370				24,789
INCOME FROM OPERATIONS			13,180				2,533
OTHER INCOME (EXPENSE):
Interest income			346				641
Interest expense			(99	)			(2,790	)
Foreign currency gain			152				83
Other income (expense), net			1,434				(21	)
Total other income (expense), net			1,833				(2,087	)
Income from continuing operations before income taxes			15,013				446
PROVISION FOR INCOME TAXES			(2,252	)			(529	)
INCOME (LOSS) FROM CONTINUING OPERATIONS			12,761				(83	)
Results of discontinued operations			—				817
Provision for income taxes			—				—
INCOME FROM DISCONTINUED OPERATIONS			—				817
NET INCOME		$	12,761			$	734
NET INCOME PER BASIC SHARE:
Income (loss) from continuing operations		$	0.29			$	0.00
Income from discontinued operations		$	0.00			$	0.02
BASIC EARNINGS PER SHARE		$	0.29			$	0.02
NET INCOME PER DILUTED SHARE
Income (loss) from continuing operations		$	0.28			$	0.00
Income from discontinued operations		$	0.00			$	0.02
DILUTED EARNINGS PER SHARE		$	0.28			$	0.02
BASIC WEIGHTED-AVERAGE COMMON SHARES OUTSTANDING			44,571				32,755
DILUTED WEIGHTED-AVERAGE COMMON SHARES OUTSTANDING			45,004				32,878

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

ADVANCED ENERGY INDUSTRIES, INC. AND SUBSIDIARIES

Condensed Consolidated Statements of Cash Flows (Unaudited)

		Three Months Ended March 31,
		2006				2005
CASH FLOWS FROM OPERATING ACTIVITIES:
Net income		$	12,761			$	734
Adjustments to reconcile net income to net cash provided by operating activities — Depreciation and amortization			4,123				4,577
Amortization of deferred debt issuance costs			—				275
Stock-based compensation			779				56
Provision for deferred income taxes			4				726
Gain on sale of marketable security investments			(1,670	)			—
Changes in operating assets and liabilities —
Accounts receivable, net			(3,099	)			934
Inventories			490				6,233
Other current assets			1,950				2,184
Trade accounts payable			(529	)			7,057
Other current liabilities and accrued expenses			(780	)			(2,678	)
Income taxes payable/receivable, net			583				(896	)
Non-current assets			91				(905	)
Non-current liabilities			64				(157	)
Net cash provided by operating activities			14,767				18,140
CASH FLOWS FROM INVESTING ACTIVITIES:
Purchase of marketable securities			(1,990	)			(438	)
Proceeds from sale of equity securities			1,992				—
Purchase of property and equipment			(730	)			(2,917	)
Net cash used in investing activities			(728	)			(3,355	)
CASH FLOWS FROM FINANCING ACTIVITIES:
Payments on senior borrowings and capital lease obligations			(630	)			(1,182	)
Proceeds from common stock transactions			1,509				131
Net cash provided by (used in) financing activities			879				(1,051	)
EFFECT OF CURRENCY TRANSLATION ON CASH			173				(772	)
INCREASE IN CASH AND CASH EQUIVALENTS			15,091				12,962
CASH AND CASH EQUIVALENTS, beginning of period			52,874				38,404
CASH AND CASH EQUIVALENTS, end of period		$	67,965			$	51,366
SUPPLEMENTAL DISCLOSURE OF CASH FLOW INFORMATION:
Cash paid for interest		$	99			$	3,165
Cash paid for income taxes, net		$	1,610			$	853

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

ADVANCED ENERGY INDUSTRIES, INC. AND SUBSIDIARIES

Notes to Condensed Consolidated Financial Statements (Unaudited)

(1) BASIS OF PRESENTATION AND SUMMARY OF SIGNIFICANT ACCOUNTING POLICIES

     In the opinion of management, the accompanying unaudited condensed consolidated balance sheets, statements of operations and cash flows contain all adjustments, consisting of normal, recurring adjustments necessary to present fairly the financial position of Advanced Energy Industries, Inc., a Delaware corporation, and its wholly owned subsidiaries (the “Company”) at March 31, 2006 and December 31, 2005, and the results of their operations for the three-month periods ended March 31, 2006 and 2005, and cash flows for the three-month periods ended March 31, 2006 and 2005.

          The unaudited condensed consolidated financial statements presented herein have been prepared in accordance with the instructions to Form 10-Q and do not include all the information and note disclosures required by accounting principles generally accepted in the United States. The condensed consolidated financial statements should be read in conjunction with the audited consolidated financial statements and notes thereto contained in the Company’s Annual Report on Form 10-K for the year ended December 31, 2005, filed with the Securities and Exchange Commission on March 28, 2006.

     ESTIMATES AND ASSUMPTIONS — The preparation of the Company’s condensed consolidated financial statements in conformity with accounting principles generally accepted in the United States requires the Company’s management to make estimates and assumptions that effect the reported amounts of assets and liabilities, and disclosure of contingent assets and liabilities at the date of the financial statements and the reported amounts of revenue and expenses during the reporting period. Significant estimates are used when establishing allowances for doubtful accounts, determining useful lives for depreciation and amortization, assessing the need for impairment charges, establishing warranty reserves, establishing the fair value of stock-based compensation, accounting for income taxes, and assessing excess and obsolete inventory and various others items. The Company evaluates these estimates and judgments on an ongoing basis and bases its estimates on historical experience, current conditions and various other assumptions that are believed to be reasonable under the circumstances. The results of these estimates form the basis for making judgments about the carrying values of assets and liabilities as well as identifying and assessing the accounting treatment with respect to commitments and contingencies. Actual results may differ from these estimates under different assumptions or conditions.

     NEW ACCOUNTING PRONOUNCEMENTS — In December 2004, the Financial Accounting Standards Board (the “FASB”) reissued Statement of Financial Accounting Standard (“SFAS”) No. 123, “Accounting for Stock-Based Compensation” as SFAS No. 123(R), “Share Based Compensation.” This statement replaces SFAS No. 123, amends SFAS No. 95, “Statement of Cash Flows”, and supersedes Accounting Principles Board (“APB”) Opinion No. 25, “Accounting for Stock Issued to Employees.” SFAS No. 123(R) requires companies to apply a fair-value based measurement method in accounting for share-based payment transactions with employees and to record compensation expense for all share-based awards granted, and to awards modified, repurchased or cancelled after the required effective date. Compensation expense for outstanding awards for which the requisite service had not been rendered as of the effective date

will be recognized over the remaining service period using the compensation cost calculated for pro forma disclosure purposes under SFAS No. 123, adjusted for expected forfeitures. Additionally, SFAS No. 123(R) requires entities to record compensation expense for employee stock purchase plans that may not have previously been considered compensatory under the existing rules. It also requires the benefits associated with tax deductions in excess of recognized compensation cost to be reported as a financing cash flow rather than as an operating cash flow as previously required. The Company has adopted SFAS No. 123(R) as of January 1, 2006. See Note 2, Stock-Based Compensation, for discussion of the impact of adoption and required disclosures.

     In November 2004, the FASB issued SFAS No. 151, “Inventory Costs”, an amendment of Accounting Research Bulletin No. 43, Chapter 4, “Inventory Pricing.” SFAS No. 151 clarifies that abnormal amounts of idle facility expense, freight, handling costs, and wasted materials (spoilage) should be recognized as current-period charges. In addition, it requires that allocation of fixed production overheads to the costs of conversion be based on the normal capacity of the production facilities. SFAS No. 151 is effective for inventory costs incurred during fiscal years beginning after June 15, 2005 and is applied on a prospective basis by the Company for the fiscal year beginning January 1, 2006. The adoption of SFAS No. 151 did not have a material affect on the Company’s financial position and results of operations.

     On June 9, 2005, the FASB issued SFAS No. 154, “Accounting Changes and Error Corrections.” SFAS No. 154 replaces APB Opinion No. 20, “Accounting Changes”, and SFAS No. 3, “Reporting Accounting Changes in Interim Financial Statements”, and changes the requirements for the accounting for and reporting of a change in accounting principle. SFAS No. 154 applies to all voluntary changes in accounting principle. It also applies to changes required by an accounting pronouncement in the unusual instance that the pronouncement does not include specific transition provisions. SFAS No. 154 must be adopted for accounting changes and corrections of errors made in fiscal years beginning after December 15, 2005. The adoption of SFAS No. 154 has not had a material affect on the Company’s financial position and results of operations.

          REVENUE RECOGNITION — The Company’s standard shipping term is freight on board (“FOB”) shipping point, for which revenue is recognized upon shipment of its products, at which time title passes to the customer, the price is fixed and collectibility is reasonably assured. For certain customers, the Company has FOB destination terms, for which revenue is recognized upon receipt of the products by the customer, at which time title passes to the customer, the price is fixed and collectibility is reasonably assured. Revenues from contracts that contain customer acceptance provisions are deferred until customer acceptance occurs. Revenue deferrals are reported as customer deposits and deferred revenue in the condensed consolidated balance sheets. Generally, the Company does not have obligations to its customers after its products are shipped under FOB shipping point terms, after its products are received by customers under FOB destination terms, and after the products are accepted by customers under contractual acceptance provisions, other than pursuant to warranty obligations. In limited instances, the Company provides installation of its products. In accordance with Emerging Issues Task Force Issue 00-21 “Accounting for Revenue Arrangements With Multiple Deliverables”, the Company allocates revenue based on the fair value of the delivered item, generally the product, and the undelivered item, installation, based on their respective fair values. Revenue related to the undelivered item is deferred until the services have been completed.

     In certain instances, the Company requires its customers to pay for a portion or all of their purchases prior to the Company building or shipping these products. Cash payments received prior to shipment are recorded as customer deposits and deferred revenue in the condensed consolidated balance sheets, and then recognized as revenue as appropriate based upon the shipping terms of the products. The Company does not offer price protections to its customers or allow returns, unless covered by its normal policy for repair of defective products.

     STOCK-BASED COMPENSATION – As of January 1, 2006, the Company adopted the provisions of SFAS No. 123(R) to account for its stock plans and employee stock purchase plan, which requires the recognition of the fair value of stock-based compensation in the statement of operations. The fair value of stock options and purchase rights pursuant the employee stock purchase plan is estimated using the Black-Scholes valuation model. This model requires the input of highly subjective assumptions, including expected life of the award and expected stock price volatility. The fair value of restricted stock units is determined based upon the Company’s closing stock price on the grant date. The fair value of stock-based awards is amortized over the requisite service period, typically the vesting period, of the award on a straight-line basis. See Note 2, Stock-Based Compensation, for discussion of the impact of adoption and required disclosures.

     WARRANTY RESERVE POLICY — The Company offers warranty coverage for its products for periods typically ranging from 12 to 24 months after shipment. The Company estimates the anticipated costs of repairing products under warranty based on the historical cost of the repairs and expected failure rates. The assumptions used to estimate warranty accruals are reevaluated periodically in light of actual experience and, when appropriate, the accruals are adjusted. The Company’s determination of the appropriate level of warranty accrual is subjective and based on estimates. Estimated warranty costs are recorded at the time of sale of the related product, and are recorded within cost of sales in the condensed consolidated statements of operations.

     The Company recorded warranty charges of $2.6 million in the three months ended March 31, 2006 and $3.0 million in three months ended March 31, 2005.

     Included within the warranty charges is amortization of customer service equipment, which is manufactured product that is utilized as replacement and loaner equipment to existing customers, of $378,000 in the 2006 period and $496,000 in the 2005 period.

     The following summarizes the activity in the Company’s warranty reserves during the 2006 and 2005 periods:

		Three Months Ended March 31,
		2006				2005
		(In thousands)
Balance at beginning of period		$	6,313			$	6,791
Additions charged to expense			2,255				2,514
Deductions			(2,568	)			(2,624	)
Balance at end of period		$	6,000			$	6,681

     EXCESS AND OBSOLETE INVENTORY— Inventory is written down or written off when it becomes obsolete, generally due to engineering changes to a product or discontinuance of a product line, or when it is deemed excess. Judgment by management is necessary in estimating the net realizable value of inventory based primarily upon forecasts of product demand. Charges

for excess and obsolete inventory are recorded, as necessary, within cost of sales in the condensed consolidated statement of operations.

     INCOME TAXES — The Company accounts for income taxes in accordance with SFAS No. 109, “Accounting for Income Taxes.” SFAS No. 109 requires deferred tax assets and liabilities to be recognized for temporary differences between the tax basis and financial reporting basis of assets and liabilities, computed at the expected tax rates for the periods in which the assets or liabilities will be realized, as well as for the expected tax benefit of net operating loss and tax credit carryforwards. Since 2003, the Company has recorded valuation allowances against certain of its United States and foreign net deferred tax assets in jurisdictions where it has incurred significant losses. Given such loss experience, management could not conclude that it was more likely than not that these net deferred tax assets will be realized. While the Company’s operating results have improved in recent periods and may continue to improve in future periods, the Company’s management, in accordance with SFAS No. 109, in evaluating the recoverability of these net deferred tax assets, is required to place greater weight on historical results as compared to projections regarding future taxable income. If the Company generates future taxable income, or should it be able to conclude that sufficient taxable income is reasonably assured based on profitable operations in the tax jurisdictions against which these tax attributes may be applied, some portion or all of the valuation allowance will be reversed and a corresponding reduction in income tax expense will be reported in such period.

     The Company assesses the recoverability of its net deferred tax assets on a quarterly basis. If it is determined that it is more likely than not that the Company will realize a portion or all of its net deferred tax assets, some portion or all of the valuation allowance will be reversed with a corresponding reduction in income tax expense in such period. From 2003 through the present, the Company has only reversed portions of such valuation allowances for which it has realized the underlying asset.

     When recording acquisitions, the Company has recorded valuation allowances due to the uncertainty related to the realization of certain deferred tax assets existing at the acquisition dates. The amount of deferred tax assets considered realizable is subject to adjustment in future periods if estimates of future taxable income are changed. Reversals of valuation allowances recorded in purchase accounting will be reflected as a reduction of goodwill in the period of reversal.

     A portion of the valuation allowance relates to the benefit from stock-based compensation. Any reversal of valuation allowance from this item will be reflected as a component of stockholders’ equity.

          COMMITMENTS AND CONTINGENCIES — The Company is involved in disputes and legal actions arising in the normal course of our business. The Company accrues loss contingencies in connection with its commitments and contingencies, including litigation, when it is probable that a loss has occurred and the amount of the loss can be reasonably estimated.

          GOODWILL AND OTHER INTANGIBLE ASSETS — Goodwill represents the excess of the cost over the fair market value of net tangible and identifiable intangible assets of acquired businesses.

     Goodwill and certain other intangible assets with indefinite lives are not amortized. Instead, goodwill and other indefinite-lived intangible assets are subject to periodic (at least annual) tests for impairment. For the periods presented, the Company did not have any indefinite-lived intangible assets, other than goodwill. Impairment testing is performed in two steps: (i) goodwill

is assessed for potential impairment by comparing the fair value of the Company’s reporting unit with the carrying value, and (ii) if potential impairment is indicated because the reporting unit’s fair value is less than its carrying amount, the amount of impairment loss is measured by comparing the implied fair value of goodwill with the carrying amount of that goodwill.

     Finite-lived intangible assets continue to be amortized using the straight-line method over their estimated useful lives and are reviewed for impairment whenever events or circumstances indicate that their carrying amount may not be recoverable.

          RECLASSIFICATIONS — Certain prior period amounts have been reclassified to conform to the current period presentation.

(2) STOCK-BASED COMPENSATION

Implementation of SFAS No. 123(R)

     Prior to January 1, 2006, the Company accounted for its stock plans under the provisions of Accounting Principles Board Opinion No. 25, “Accounting for Stock Issued to Employees” and related interpretations (“APB Opinion No. 25”). APB Opinion No. 25 required the use of the intrinsic value method, which measured compensation cost as the excess, if any, of the quoted market price of the stock at the measurement date over the amount an employee must pay to acquire the stock. As the stock options granted under these plans typically had an exercise price equal to the market value of the underlying common stock on the date of grant, no compensation cost related to stock options was reflected in the Company’s results of operations. The Company began to grant restricted stock units (“RSUs”) in the first quarter of 2005, for which the related compensation expense is recorded over the requisite service period.

     The Company adopted Statement of Financial Accounting Standards No. 123 (revised 2004), “Share-Based Payment” (“SFAS No. 123(R)”) effective January 1, 2006 (the “adoption date”) using the modified prospective transition method. Under the modified prospective transition method, stock-based compensation expense recognized in the Company’s statement of operations in the three months ended March 31, 2006 includes: (a) stock options and RSUs granted prior to, but not fully vested as of the adoption date, based on the grant-date fair value estimated in accordance with the original provisions of SFAS No. 123, (b) stock options and RSUs granted subsequent to the adoption date, based on the grant-date fair value estimated in accordance with the provisions of SFAS No. 123(R), and (c) purchase rights granted under the employee stock purchase plan (the “ESPP”) with the offering period beginning prior to, but not yet vested as of the adoption date, based on the fair value estimated in accordance with the original provisions of SFAS 123. The estimated fair value of the Company’s stock-based awards, less expected forfeitures, is amortized on a straight-line basis over the awards’ requisite service period, typically the vesting period. Under the modified prospective transition method, results for prior periods are not restated.

     The Company recognized stock-based compensation expense of $779,000 in the first quarter of 2006 compared to $56,000 in the first quarter of 2005. Included in these amounts are expenses related to RSUs of $138,000 in the first quarter of 2006 and $56,000 in the first quarter of 2005, which would have been included in the Company’s condensed consolidated statements of operations under the provisions of APB Opinion No. 25. The expense related to RSUs is therefore excluded from the impact of the adoption of SFAS No. 123(R). As a result of adopting SFAS No. 123(R), the Company’s income before income taxes and net income for the three months ended March 31, 2006 were reduced by $641,000. No income tax benefit has been recognized in the condensed consolidated statement of operations related to stock-based

compensation expense, due to the Company fully reserving against the related deferred tax assets. The implementation of SFAS No. 123(R) reduced basic and diluted earnings per share by $0.01 for the three months ended March 31, 2006. The implementation of SFAS No. 123(R) did not have a significant impact on cash flows from operations during the three months ended March 31, 2006.

     The modified prospective transition method of SFAS No. 123(R) requires the presentation of pro forma information, for periods presented prior to the adoption of SFAS No. 123(R), regarding net income and earnings per share as if the Company had accounted for its stock plans under the fair value method. Had compensation expense for the Company’s stock plans been determined consistent with the fair value-based method prescribed by the original provisions of SFAS No. 123, the Company’s net income would have decreased to the following adjusted amounts:

(in thousands, except per share data)		Three Months Ended
		March 31, 2005
Net income:
As reported		$	734
Adjustment for stock-based compensation determined under fair value-based method for all awards (a), (b)			(1,934	)
Less: Compensation expense recognized in net income (a)			56
As adjusted		$	(1,144	)
Basic earnings (loss) per share:
As reported		$	0.02
As adjusted		$	(0.03	)
Diluted earnings (loss) per share:
As reported		$	0.02
As adjusted		$	(0.03	)

(a) Compensation expense in 2005 is presented prior to income tax effects due to the Company fully reserving against the related deferred tax assets.

(b) Cumulative compensation cost recognized with respect to options that are forfeited prior to vesting is reflected as a reduction of compensation expense in the period of forfeiture. Compensation expense related to awards granted under the Company’s employee stock purchase plan is estimated until the period in which settlement occurs, as the number of shares of common stock awarded and the purchase price are not known until settlement.

     For pro forma purposes, the fair value of each option grant and purchase right granted under the ESPP were estimated on the date of grant using the Black-Scholes option pricing model with the following weighted-average assumptions:

		2005
OPTIONS:
Risk-free interest rates			3.4	%
Expected dividend yield rates			0.0	%
Expected lives		2.9 years
Expected volatility			71.6	%
ESPP:
Risk-free interest rates			2.4	%
Expected dividend yield rates			0.0	%
Expected lives		0.5 years
Expected volatility			62.5	%

Stock Plans and ESPP

     As of March 31, 2006, the Company had three active stock plans; the 2003 Stock Option Plan, the 2003 Non-Employee Directors’ Stock Option Plan and the ESPP, which are described below.

Stock Options and RSUs

     The 2003 Stock Option Plan (the “2003 Plan”), a shareholder-approved plan, is a broad-based plan for employees and consultants of the Company. The 2003 Plan provides for the issuance of up to 3,250,000 shares of common stock. The exercise price of incentive stock options and non-qualified stock options may not be less than the market value of the Company’s common stock on the date of grant. The administrator of the plan has the discretion to determine the vesting period of options granted under the 2003 Plan; however option and RSU grants will generally vest over four years, contingent upon the recipient continuing to be an employee, director or consultant of the Company. Options granted under the 2003 plan generally are exercisable for ten years from the date of grant. As of March 31, 2006, approximately 1.2 million shares of common stock were available for grant under the 2003 Plan.

     The 2003 Non-Employee Directors’ Stock Option Plan (the “2003 Directors’ Plan”), a shareholder-approved plan, provides for the issuance of up to 250,000 shares of common stock. The exercise price of options granted under the 2003 Directors’ Plan may not be less than the market value of the Company’s common stock on the date of grant. Currently, non-employee directors are automatically granted options to purchase 15,000 shares on the first date elected or appointed as a member of the Company’s board, and 5,000 shares on any date re-elected as a member of the board. Options granted on the date first elected or appointed as a member of the Company’s board immediately vest as to one-third of the shares subject to the grant, then another one-third on each of the first two anniversaries of the date granted, provided the recipient continues to be a director of the Company. Options granted upon re-election are immediately exercisable. The options are exercisable for ten years from the date of grant. The Company has proposed to its stockholders an amendment of the 2003 Directors’ Plan, which enables different forms of equity awards to be granted under the 2003 Directors’ Plan. The Company has revised its non-employee director compensation structure, subject to shareholder approval of the foregoing amendment to the 2003 Directors’ Plan, which revision would result in non-employee directors being granted 5,000 RSUs on the date first elected or appointed as a member of the Company’s board, and 2,000 RSUs on any date re-elected as a member of the board. Such RSU grants would vest over four years, contingent upon the recipient continuing to be a director of the Company. As of March 31, 2006, 120,000 shares of common stock were available for grant under the 2003 Directors’ Plan.

     A summary of stock option activity under these plans as of March 31, 2006 and changes during the three months then ended is presented below:

(In thousands, except exercise prices and contractual terms)										Weighted-
										average
						Weighted-				Remaining
						average				Contractual				Aggregate
		Shares				Exercise Price				Term (years)				Intrinsic Value
Stock options:
Employees —
Options outstanding at December 31, 2005			3,183			$	19.22
Options granted			298				16.06
Options exercised			(142	)			10.55
Options terminated			(207	)			23.58
Options outstanding at March 31, 2006			3,132				19.00				7.1			$	5,622
Options exercisable at March 31, 2006			2,297				21.72				6.4			$	2,867
Weighted-average fair value of options granted during the period		$	9.84
Non-employee directors —
Options outstanding at December 31, 2005			183			$	14.58
Options granted			—				—
Options exercised			(3	)			6.75
Options terminated			—				—
Options outstanding at March 31, 2006			180				14.77				7.0			$	432
Options exercisable at March 31, 2006			155				15.32				6.7			$	362
Weighted-average fair value of options granted during the period			—

          The total intrinsic value of options exercised during the three months ended March 31, 2006 was $699,000 and $16,000 for the three months ended March 31, 2005, determined as of the exercise date. As of March 31, 2006, there was $5.5 million of total unrecognized compensation cost related to stock options granted and outstanding, which cost is expected to be recognized through fiscal year 2010, with a weighted average remaining period of 2.1 years. Cash received from stock option exercises was $1.5 million during the three months ended March 31, 2006.

     For SFAS No. 123(R) purposes, the fair value of each option grant is estimated on the date of grant using the Black-Scholes option pricing model with the following weighted-average assumptions:

		Three Months Ended
		March 31, 2006
Risk-free interest rates			4.6%
Expected dividend yield rates			0.0%
Expected lives		5.5 years
Expected volatility			65.7%

     The computation of the expected volatility assumption for new grants is based on a combination of historical and implied volatilities. When establishing the expected life assumption, the Company reviews historical exercise behavior of option grants with similar vesting periods and post-vesting termination behavior.

     A summary of the status of the Company’s non-vested RSUs as of March 31, 2006, and changes during the three months then ended is presented below:

(In thousands, except fair values)						Weighted-
						average
						Grant-date
		Shares				Fair Value
Non-vested RSUs outstanding at December 31, 2005			235			$	7.72
RSUs granted			110				15.61
RSUs vested			(18	)			7.15
RSUs forfeited			(6	)			7.15
Non-vested RSUs outstanding at March 31, 2006			321				10.48

     The fair value of the Company’s RSUs is determined based upon the closing fair market value of the Company’s common stock on the grant date. As of March 31, 2006, there was $2.5 million of total unrecognized compensation cost related to non-vested RSUs granted, which cost is expected to be recognized over a weighted average period of 3.2 years. During the first quarter of 2006, the total fair value of RSUs which vested was $288,000, based upon the closing fair market value of the Company’s common stock on the date the underlying common stock was released to the recipient.

Employee Stock Purchase Plan (the “ESPP”)

          The ESPP, a shareholder-approved plan, provides for the issuance of up to 500,000 shares of common stock. Employees are eligible to participate in the ESPP if employed by the Company for at least 20 hours per week during at least five months per calendar year. Participating employees may have the lesser of 5% their earnings or $1,250 per six-month period withheld. The purchase price of common stock purchased under the ESPP is equal to 85% of the lower of the fair market value on the commencement date of each offering period or the relevant purchase date. Each plan period is six months. At March 31, 2006, approximately 145,000 shares remained available for future issuance under the ESPP.

     Purchase rights granted under the ESPP are valued using the Black-Scholes model. Prior to the adoption of SFAS No. 123(R), the Company used historical volatility in deriving its expected volatility assumption; however, the Company has determined that implied volatility provides a more accurate reflection of market conditions and is a better indicator of expected volatility than historical volatility for the six month plan period. During the three months ended March 31, 2006, no purchase rights were granted under the ESPP. As of March 31, 2006, there was $38,000 of total unrecognized compensation cost related to the ESPP that is expected to be recognized over a remaining period of two months.

(3) RESTRUCTURING CHARGES

     Restructuring charges include the costs associated with actions taken by the Company primarily in response to downturns in the semiconductor capital equipment industry or to reduce costs and improve operating efficiencies. These charges consist of costs that are incurred to exit an activity or cancel an existing contractual obligation, including the closure of facilities and employee termination related charges.

     The following table summarizes the components of the restructuring charges, the payments and other settlements, and the remaining accrual as of March 31, 2006:

		Employee
		Severance and				Facility				Impairment				Total
		Termination				Closure				of Facility-				Restructuring
		Costs				Costs				related Assets				Charges
						(In thousands)
Accrual balance December 31, 2004		$	3,293			$	1,121			$	—			$	4,414
First quarter 2005 restructuring charge			1,262				—				—				1,262
Second quarter 2005 restructuring charge			475				4				589				1,068
Third quarter 2005 restructuring charge			202				31				157				390
Third quarter 2005 restructuring reversal			(180	)			—				—				(180	)
Fourth quarter 2005 restructuring charge			135				31				—				166
Total net restructuring charges 2005			1,894				66				746				2,706
Payments and other settlements in 2005			(5,057	)			(701	)			(746	)			(6,504	)
Accrual balance December 31, 2005			130				486				—				616
First quarter 2006 restructuring charge			—				29				—				29
Payments and other settlements in 2006			(130	)			(191	)			—				(321	)
Accrual balance March 31, 2006		$	—			$	324			$	—			$	324

     Related to the transition of certain product lines from certain of the Company’s locations in the United States, Europe and Japan to Shenzhen, China, the Company recorded restructuring charges for employee severance and termination costs of $1.3 million in the first quarter of 2005, $475,000 in the second quarter, $202,000 in the third quarter and $135,000 in the fourth quarter. These charges are associated with 216 employees in the United States, 11 employees in Europe and three employees in Japan. Through the transition of the Company’s manufacturing operations from the Fort Collins facility to Shenzhen, China, the Company recognized the need to retain 11 employees considered in the original reserve, and therefore in the third quarter of 2005 restructuring reserves of $180,000 had been reversed. There are no employee severance and termination costs remaining to be paid as of March 31, 2006.

     Impairments of facility-related assets were recorded in the second quarter of 2005 for $589,000 in the United States and in the third quarter of 2005 for $157,000 in Japan, as a result of consolidation of certain of the Company’s facilities.

     The remaining facility closure cost liability is expected to be paid over the remaining lease term expiring at the end of 2006 and is reflected net of expected sublease income of $28,000.

(4) INCOME TAXES

     As of March 31, 2006, the Company had a gross federal net operating loss carryforward of approximately $81 million, of which approximately $12 million is subject to further limitations under the United States consolidated tax rules, an alternative minimum tax credit carryforward of approximately $2 million, and research and development credit carryforwards of approximately $4 million, each of which may be available to offset future federal income tax liabilities. The federal net operating loss and research and development credit carryforwards expire at various dates through December 31, 2024, and the alternative minimum tax credit carryforward has no expiration date. The Company is unable to provide a tax benefit from its net operating loss carryforward because it has not demonstrated sustained profitability in the United States. Approximately $3 million of the valuation allowance relates to the benefit from stock-based compensation expense; any reversal of such valuation allowances will be reflected as a component of stockholders’ equity. Approximately $4 million of the valuation allowance relates to deferred tax assets obtained through acquisitions; any reversal of such valuation allowance

allowances will be reflected as a reduction of goodwill. In addition, as of March 31, 2006, the Company had a gross foreign net operating loss carryforward of $3 million, which may be available to offset future foreign income tax liabilities and expires at various dates through December 31, 2011.

     The income tax provision on income from continuing operations before income taxes was $2.3 million for the first quarter of 2006 and represents an effective tax rate of 15%, and the income tax provision on income from continuing operations before income taxes was $529,000 for the first quarter of 2005 and represents an effective rate of 119%. The change in the effective tax rate from the 2005 period to the 2006 period is due to the change in the mix of taxable income earned by jurisdiction. In the 2005 period, losses were realized in the United States which receive no corresponding tax benefit due to valuation allowances, compared to income being generated in the United States in the 2006 period, which receive no corresponding tax provision due to the net operating loss carryforwards.

(5) DISPOSITIONS AND DISCONTINUED OPERATIONS

     On November 23, 2005, the Company entered into an agreement to sell the assets of its IKOR product line to an unrelated third party, as this product line was not considered to be critical to the Company’s core operations. Net cash proceeds of $8.9 million were received, with an additional $1.0 million held in escrow to satisfy any potential indemnity claims. The Company recognized a gain on the sale of $5.0 million, which was recorded in discontinued operations in the statement of operations. The results of operations directly attributed to the IKOR product line that have been reclassified from continuing operations are as follows:

		Three Months Ended
(in thousands)		March 31, 2005
Sales		$	3,964
Cost of sales			2,211
Operating expenses			936

(6) MARKETABLE SECURITIES

     Marketable securities consisted of the following:

		March 31,				December 31,
		2006				2005
		(In thousands)
Commercial paper		$	4,604			$	4,639
Municipal bonds and notes			1,903				1,901
Institutional money markets			2,308				271
Total marketable securities		$	8,815			$	6,811

     These marketable securities are classified as available-for-sale and are stated at period end market value. The commercial paper consists of high credit quality, short-term preferreds with maturities or reset dates of approximately 120 days.

(7) ACCOUNTS RECEIVABLE

     Accounts receivable consisted of the following:

		March 31,				December 31,
		2006				2005
		(In thousands)
Domestic		$	31,049			$	21,797
Foreign			39,062				43,748
Allowance for doubtful accounts			(651	)			(645	)
Trade accounts receivable, net			69,460				64,900
Other			2,780				4,092
Total accounts receivable, net		$	72,240			$	68,992

(8) INVENTORIES

     Inventories consisted of the following:

		March 31,				December 31,
		2006				2005
		(In thousands)
Parts and raw materials		$	41,711			$	42,090
Work in process			5,522				3,982
Finished goods			8,707				10,127
Total inventories		$	55,940			$	56,199

     Inventories include costs of materials, direct labor and manufacturing overhead. Inventories are valued at the lower of cost or market, computed on a first-in, first-out basis and are presented net of reserves for excess and obsolete inventory.

(9) GOODWILL AND OTHER INTANGIBLE ASSETS

     Goodwill and amortizable intangible assets consisted of the following as of March 31, 2006:

						Cumulative
						Effect of												Weighted-
		Gross				Changes in								Net				Average
		Carrying				Exchange				Accumulated				Carrying				Useful Life
		Amount				Rates				Amortization				Amount				(Years)
		(In thousands, except weighted-average useful life)
Amortizable intangible assets:
Technology-based		$	6,600			$	1,378			$	(6,236	)		$	1,742				6
Trademarks and other			8,500				1,630				(3,777	)			6,353				17
Total amortizable intangible assets			15,100				3,008				(10,013	)			8,095				12
Goodwill			53,589				8,032				—				61,621
Total goodwill and amortizable intangible assets		$	68,689			$	11,040			$	(10,013	)		$	69,716

Goodwill and amortizable intangible assets consisted of the following as of December 31, 2005:

						Cumulative
						Effect of												Weighted-
		Gross				Changes in								Net				Average
		Carrying				Exchange				Accumulated				Carrying				Useful Life
		Amount				Rates				Amortization				Amount				(Years)
		(In thousands, except weighted-average useful life)
Amortizable intangible assets:
Technology-based		$	7,000			$	1,354			$	(6,322	)		$	2,032				5
Trademarks and other			8,500				1,613				(3,618	)			6,495				17
Total amortizable intangible assets			15,500				2,967				(9,940	)			8,527				12
Goodwill			53,589				7,727				—				61,316
Total goodwill and amortizable intangible assets		$	69,089			$	10,694			$	(9,940	)		$	69,843

     Aggregate amortization expense related to amortizable intangible assets for the first quarter of 2006 was $477,000 and for the first quarter of 2005 was $547,000. Estimated amortization expense related to the Company’s acquired intangibles fluctuates with changes in foreign currency exchange rates between the United States dollar and the Japanese yen and the euro. Estimated amortization expense related to amortizable intangibles for each of the five years 2006 through 2010 is as follows:

		Estimated
		Amortization
		Expense
		(in thousands)
2006		$	1,665
2007			960
2008			750
2009			477
2010			386

(10) STOCKHOLDERS’ EQUITY

     Stockholders’ equity consisted of the following:

		March 31,				December 31,
(In thousands, except par value)		2006				2005
Common stock, $0.001 par value, 70,000 shares authorized, 44,661 and 44,500 shares issued and outstanding, respectively		$	45			$	45
Additional paid-in capital			254,665				253,675
Retained earnings			12,783				22
Deferred compensation			—				(1,290	)
Unrealized holding gains on available-for-sale securities, net of tax			423				1,328
Cumulative translation adjustments, net of tax			6,066				3,650
Total stockholders’ equity		$	273,982			$	257,430

     In accordance with the provisions of SFAS No. 123(R), adopted on January 1, 2006, the balance of $1.3 million in deferred compensation as of December 31, 2005 was written-off against additional paid-in capital.

(11) COMPREHENSIVE INCOME (LOSS)

     Comprehensive income (loss) for the Company consists of net income, foreign currency translation adjustments and net unrealized holding gains on available-for-sale marketable securities as presented below (in thousands):

		Three Months Ended
		March 31,
		2006				2005
Net income, as reported		$	12,761			$	734
Adjustment to arrive at comprehensive income (loss), net of taxes:
Unrealized holding gain on available-for-sale marketable securities			59				374
Reclassification adjustment for amounts included in net income related to sales of securities			(964	)			—
Cumulative translation adjustments			2,416				(2,938	)
Comprehensive income (loss) income		$	14,272			$	(1,830	)

(12) COMMITMENTS AND CONTINGENCIES

     The Company is involved in disputes and legal actions arising in the normal course of its business. Historically, the Company’s most significant legal actions have involved the application of patent law to complex technologies and intellectual property. The determination of whether such technologies infringe upon the Company’s or others’ patents is highly subjective. This high level of subjectivity introduces substantial additional risk with regard to the outcome of the Company’s disputes and legal actions related to intellectual property. An unfavorable decision, particularly in patent litigation, could require material changes in production processes and products or result in the Company’s inability to ship products or components found to have violated third-party patent rights. The Company accrues loss contingencies in connection with its litigation when it is probable that a loss will occur and the amount of the loss can be reasonably estimated.

     On June 8, 2005, the Korean Customs Service (“KCS”) issued a Pre-Taxation Notification concerning back duties and value added taxes allegedly owed on goods imported by the Company’s Korean subsidiary, Advanced Energy Industries Korea, Inc., during the five year period ended June 8, 2005. On June 27, 2005, the Company protested the notifications on the grounds that the assessment was unwarranted and based on a misapplication of international tariff rules. On September 9, 2005, the KCS rejected the protest brought by the Company. Beginning on September 19, 2005, the KCS issued a series of taxation notices for duties and penalties owed of approximately $2.2 million. In order to appeal the assessment to the Korean National Tax Tribunal, an independent review board of the Korean Ministry of Finance and Economy, the Company paid the taxation notices. The Company filed its appeals of the assessments in December 2005, and the KCS filed a response in opposition to its appeal. The Company anticipates that the Korean National Tax Tribunal will schedule a hearing for adjudication of the matter in the third quarter of 2006. Although the Company has paid the taxation notices in order to appeal the assessment, the Company does not believe such amounts represent a probable expense and therefore has not accrued such in the condensed consolidated statement of operations, rather the amount paid has been recorded within other current assets in the condensed consolidated balance sheet.

(13) EARNINGS PER SHARE

     Basic earnings per share (“EPS”) is computed by dividing income available to common stockholders by the weighted-average number of common shares outstanding during the period. The computation of diluted EPS is similar to the computation of basic EPS except that the numerator is increased to exclude certain charges which would not have been incurred, and the denominator is increased to include the number of additional common shares that would have been outstanding (using the if-converted and treasury stock methods), if securities containing potentially dilutive common shares (convertible notes payable, stock options and restricted stock units) had been converted to such common shares, and if such assumed conversion is dilutive. As of March 31, 2006, stock options and restricted stock units totaling approximately 3.6 million were outstanding, and as of March 31, 2005, 4.5 million were outstanding. Of these amounts, 3.2 million stock options and restricted stock units for the three months ended March 31, 2006 and 3.4 million for the three months ended March 31, 2005 are not included in the computation of diluted earnings per share because the effect of including such options in the computation would be antidilutive. Potential shares of common stock issuable upon conversion of the Company’s convertible subordinated notes payable were 5.4 million at March 31, 2005; however, the effect of potential conversion of the Company’s convertible subordinated notes payable was not included in this computation because to do so would be anti-dilutive.

     The following is a reconciliation of the numerators and denominators used in the calculation of basic and diluted EPS for the three months ended March 31, 2006 and 2005:

(In thousands, except per share data)		Three Months Ended March 31,
		2006				2005
Earnings per common share
Net income		$	12,761			$	734
Weighted average common shares outstanding			44,571				32,755
Earnings per common share		$	0.29			$	0.02
Earnings per common share—assuming dilution
Net income		$	12,761			$	734
Weighted average common shares outstanding			44,571				32,755
Effect of dilutive securities:
Stock options and restricted stock units			433				123
Convertible subordinated debt			—				—
Potentially dilutive common shares			433				123
Adjusted weighted average common shares outstanding			45,004				32,878
Earnings per common share—assuming dilution		$	0.28			$	0.02

(14) FOREIGN OPERATIONS AND MAJOR CUSTOMERS

     The Company has operations in the United States, Europe and Asia Pacific. The following is a summary of the Company’s operations by region:

(In thousands)		Three Months Ended March 31,
		2006				2005
Sales (1):
Originated and sold in the United States		$	55,377			$	42,207
Originated in United States and sold outside the United States			4,344				4,363
Originated in Europe and sold outside the United States			6,249				7,186
Originated in Asia Pacific and sold in the United States			22				—
Originated in Asia Pacific and sold outside the United States			27,958				28,420
		$	93,950			$	82,176
Income (loss) from operations:
United States		$	11,779			$	(2,932	)
Europe			752				203
Asia Pacific			1,476				5,192
Intercompany eliminations			(827	)			70
		$	13,180			$	2,533

		March 31,				December 31,
		2006				2005
Identifiable assets:
United States		$	18,333			$	19,813
Europe			1,496				1,667
Asia Pacific			20,340				21,144
		$	40,169			$	42,624

     Intercompany sales among the Company’s geographic areas are recorded on the basis of intercompany prices established by the Company.

     Applied Materials, Inc. is the Company’s largest customer and accounted for 30% of the Company’s sales for the three months ended March 31, 2006 and 25% of the Company’s sales for the three months ended March 31, 2005. Novellus Systems, Inc. accounted for 10% of the Company’s sales for the three months ended March 31, 2006. Ulvac, Inc. accounted for 12% of the Company’s sales for the three months ended March 31, 2005. No other customer accounted for 10% or more of the Company’s sales during these periods.

ITEM 2. MANAGEMENT’S DISCUSSION AND ANALYSIS OF FINANCIAL CONDITION AND RESULTS OF OPERATIONS

transition to lower-cost Asian suppliers. The elimination of the duplicative costs incurred throughout the transition, the benefit of reduced manufacturing costs in China, and the reduced costs experienced through increased purchasing from Asian suppliers have positively contributed to our results of operations in the first quarter of 2006 compared to the first quarter of 2005.

Results of Operations

		Three Months Ended March 31,
		2006				2005
Semiconductor capital equipment			70	%			64	%
Data storage			5				5
Flat panel display			9				14
Advanced product applications			15				17
			100	%			100	%

          The following tables summarize our unaudited net sales and percentages of net sales by geographic region for the three-month periods ended March 31, 2006 and 2005:

		Three Months Ended March 31,
		2006				2005
		(In thousands)
United States		$	55,399			$	42,208
Europe			7,639				9,072
Asia Pacific			30,824				30,426
Rest of world			88				470
		$	93,950			$	82,176

		Three Months Ended March 31,
		2006				2005
United States			59	%			51	%
Europe			8				11
Asia Pacific			33				37
Rest of world			—				1
			100	%			100	%

     Sales were $94.0 million in the first quarter of 2006, an increase of 14% over sales of $82.2 million in the first quarter of 2005. This increase is primarily attributed to the increased demand experienced from the customers in the semiconductor capital equipment industry, offset in part by decreased sales to the flat panel display industry.

     The semiconductor capital equipment industry is highly cyclical and is impacted by changes in the macroeconomic environment, changes in semiconductor supply and demand and rapid technological advances in both semiconductor devices and wafer fabrication processes. Our sales

to the semiconductor capital equipment industry increased by approximately 25% compared to the first quarter of 2005, primarily driven by the increased demand that our semiconductor and semiconductor capital equipment customers have experienced since the second half of the fourth quarter of 2005. Sales to our largest semiconductor capital equipment customers represented the majority of the increased sales volume achieved during the first quarter of 2006 compared to the first quarter of 2005.

     Applied Materials, Inc., our largest customer, accounted for 30% of our sales for the three months ended March 31, 2006 and 25% of our sales for the three months ended March 31, 2005. Novellus Systems, Inc. accounted for 10% of our sales for the three months ended March 31, 2006. Ulvac, Inc., our largest customer in the flat panel display industry, accounted for 12% of our sales for the three months ended March 31, 2005. No other customer accounted for 10% or more of our sales during these periods.

     Our sales increased in dollar terms from the first quarter of 2005 to the first quarter of 2006 in the data storage and advanced product application markets. Sales to the data storage markets increased 19% and sales to the advanced product applications markets increased by 1%. This growth is primarily attributed to order trends and is correlated with the increase in demand in the semiconductor capital equipment market.

     The flat panel display industry is also highly cyclical. After two consecutive quarters of relatively high sales to the flat panel display industry, our sales to this market decreased 23% from the first quarter of 2005 to the first quarter of 2006, attributed primarily to unfavorable product mix. Sales to our largest flat panel display customers represented the majority of the decreased sales dollars.

     Looking forward to the remainder of 2006, there is no assurance that our revenue will remain consistent with, or increase from, the levels experienced during the three-month period ended March 31, 2006. Changes in the macroeconomic environment, semiconductor and flat panel display supply and demand, and other changes that are beyond our control introduce significant uncertainty into our forecasts. Our average selling prices may also decline across all of our markets due to cost reduction initiatives by our major customers.

  GROSS MARGIN

     Our gross margin was 41.0% in the first quarter of 2006 compared to 33.2% in the first quarter of 2005. The improvement in our gross margin is attributed to the completion of our high-volume manufacturing transition to China, lowering of our worldwide logistics costs, product portfolio management, supplier transitions, design-led cost reductions and the impact of the higher sales base.

     Our gross margin in the first quarter of 2005 was adversely affected principally by the lower sales base resulting in lower absorption of our fixed costs, and our duplicate management, procurement, engineering team and facilities costs incurred during our transition of high-volume manufacturing to Shenzhen.

     We recorded warranty charges of $2.6 million in the three months ended March 31, 2006 and $3.0 million in three months ended March 31, 2005.

  RESEARCH AND DEVELOPMENT EXPENSES

     The market for our subsystems for vacuum process systems and related accessories is characterized by ongoing technological changes. We believe that continued and timely development of new highly differentiated products and enhancements to existing products to support OEM requirements is necessary for us to maintain a competitive position in the markets we serve. Accordingly, we devote a significant portion of our personnel and financial resources to research and development projects and seek to maintain close relationships with our customers and other industry leaders in order to remain responsive to their product requirements. We believe that the continued investment in research and development and ongoing development of new products are essential to the expansion of our markets, and expect to continue to make significant investments in research and development activities. Since our inception, all of our research and development costs have been expensed as incurred.

     Our research and development expenses were $10.5 million, or 11.1% of sales, in the first quarter of 2006 and $10.3 million, or 12.5% of sales, in the first quarter of 2005. The increase from 2005 to 2006 in dollar terms was due primarily to increased variable compensation expense and stock-based compensation expenses, offset by the prioritization of our research and development projects and increased scrutiny of our costs.

  SELLING, GENERAL AND ADMINISTRATIVE EXPENSES

     Our selling expenses support domestic and international sales and marketing activities that include personnel, trade shows, advertising, and other selling and marketing activities. Our general and administrative expenses support our worldwide corporate, legal, patent, tax, financial, corporate governance, administrative, information systems and human resource functions in addition to our general management.

     Selling, general and administrative (“SG&A”) expenses were $14.9 million, or 15.8% of sales, for the first quarter of 2006 and $13.3 million, or 16.2% of sales, for the first quarter of 2005. This increase from 2005 to 2006 in dollar terms was due primarily to increased variable compensation expense, increased commissions and stock-based compensation expense, offset in part by improved spending control efforts.

  RESTRUCTURING CHARGES

     Our restructuring charges throughout 2005 were incurred primarily in conjunction with the transition of our high-volume manufacturing to Shenzhen, China, which was substantially complete as of September 30, 2005. We originally estimated that upon completion of the transfer of high-volume manufacturing to China, we would save approximately $10.0 million to $12.0 million annually in labor and related costs, compared to what the costs would have been prior to the transition at similar production volumes. The expected savings were anticipated to be approximately $7.0 million in cost of sales, approximately $2.0 million in SG&A and approximately $2.0 million in research and development. Estimated savings realized in the first quarter of 2006 are in line with our projected savings.

     Related to this manufacturing restructuring, we recorded restructuring charges in the first quarter of 2005 of $1.3 million, consisting primarily of employee severance and termination costs associated with 212 employees at our Fort Collins facility and seven employees in our European operations. No employee-related restructuring charges were recorded in the first quarter of 2006.

     The remaining facility closing liability is expected to be paid over the remaining lease term expiring at the end of 2006 and is reflected net of expected sublease income of $28,000. Additional charges and cash requirements may be required in the future if the expected sublease income is not realized.

  OTHER INCOME (EXPENSE)

     Other income (expense) consists primarily of interest income and expense, foreign exchange gains and losses and other miscellaneous gains, losses, income and expense items.

     Interest income was approximately $346,000 in the first quarter of 2006 and $641,000 in the first quarter of 2005. The decrease in interest income from the 2005 period to the 2006 period primarily reflects the 41% decrease in the average invested funds due to the use of cash to repay of our convertible subordinated notes in the third quarter of 2005.

     Interest expense consisted principally of interest on borrowings under capital lease facilities and senior debt in the first quarter of 2006, and interest on our convertible subordinated notes and amortization of our deferred debt issuance costs in the first quarter of 2005. Interest expense was $99,000 in the first quarter of 2006, down from $2.8 million for the first quarter of 2005, due primarily to the repayment of our convertible subordinated notes in the third quarter of 2005.

     Our foreign subsidiaries’ sales are primarily denominated in currencies other than the United States dollar. We recorded net foreign currency gains of $152,000 in the first quarter of 2006 and $83,000 in the first quarter of 2005.

     Net other income (expense) consists principally of miscellaneous gains and losses, including gains and losses on the sale of investments and impairments of investments. Net other income was $1.4 million for the first quarter of 2006, consisting primarily of the gain on sale of equity securities. In the first quarter of 2005, net other expense was $21,000.

   PROVISION FOR INCOME TAXES

     The income tax provision for the first quarter of 2006 was $2.3 million and represented an effective tax rate of 15%. The income tax provision on income from continuing operations for the first quarter of 2005 was $529,000 and represented an effective tax rate of 119%. The fluctuation in our effective tax rate from period to period is due to the fluctuations in our taxable income by jurisdiction. The income from our discontinued operations in 2005 was earned in the United States. No provision for income taxes is attributed to these discontinued operations, due to the valuation allowances against certain deferred tax assets in the United States, including those generated by net operating losses.

     Due primarily to valuation allowances against our deferred tax assets and our expectation of taxable income by jurisdiction, namely increased income in the United States, we expect our 2006 effective tax rate to be approximately 15%. This estimated rate is subject to variations in the relative income or loss in the tax jurisdictions in which we have operations.

  DISCONTINUED OPERATIONS

     Income from discontinued operations in the first quarter of 2005 was $817,000, which is related to the IKOR product line. The IKOR product line was sold in the fourth quarter of 2005, as it was not considered critical to our core operations. No provision for income taxes is attributed

to these operations due to the valuation allowances against certain deferred tax assets in the United States, as the income from our discontinued operations was earned in the United States.

Liquidity and Capital Resources

     At March 31, 2006, our principal sources of liquidity consisted of cash, cash equivalents and marketable securities of $76.8 million. We also have a credit facility consisting of a $40.0 million revolving line of credit, none of which was outstanding at March 31, 2006. Any advances under this revolving line of credit will be due and payable in July 2006. We do not anticipate difficulties in negotiating the terms of a new credit facility upon the expiration of our current facility in July 2006.

     We have historically financed our operations and capital requirements through a combination of cash provided by operations, the issuance of long-term debt and common stock, bank loans, capital lease obligations and operating leases. During the first quarter of 2006, our cash, cash equivalents and marketable securities increased $17.1 million from $59.7 million at December 31, 2005, primarily due to cash generated from our operations.

     Operating activities provided cash of $14.8 million in the first quarter 2006 and $18.1 million in the first quarter of 2005. The decrease in cash generated from operations is primarily attributed to timing differences in our collection of accounts receivable and disbursements of accounts payable, due to differences in the timing of sales and purchases throughout the respective quarters.

     Investing activities used cash of $728,000 in the first quarter of 2006 and $3.4 million in the first quarter of 2005. In the first quarter of 2006, we sold equity securities for proceeds of $2.0 million, which proceeds were reinvested in marketable securities. Capital expenditures in the first quarter of 2006 were $730,000, compared to capital expenditures of $2.9 million in the first quarter of 2005. With the significant capital expenditures experienced in recent years related to our investment in our manufacturing operations as well as our information technology infrastructure, we expect to reduce our capital expenditures in 2006 to approximately $6.0 million. Our planned level of capital expenditures is subject to frequent revisions as our business experiences sudden changes. In addition, changes in foreign currency exchange rates may significantly impact our capital expenditures in a particular period.

     Cash flows from investing activities fluctuate significantly from year to year as we buy and sell marketable securities, which we convert to cash to fund strategic investments and our current operations, and as we transfer cash into marketable securities when we attain levels of cash that are greater than needed for current operations.

     Financing activities generated cash of $879,000 in the first quarter of 2006, due to the proceeds from the exercise of stock options of $1.5 million, offset by $630,000 in payments on our senior borrowings and capital lease obligations. Financing activities used cash of $1.1 million in the first quarter of 2005, due to payments on our senior borrowings and capital lease obligations of $1.2 million, partially offset by proceeds from the exercise of employee stock options of $131,000.

     We expect our cash flows from financing activities to continue to fluctuate in the future. Our payments under capital lease obligations and senior borrowings may also increase in the future if we enter into additional capital lease obligations or change the level of our bank financing. We estimate that our payments under senior borrowings for the rest of 2006 will be approximately $1.2 million. A significant portion of these obligations are held in countries other than the United States; therefore, future foreign currency fluctuations, especially between the United States dollar and the Korean won, could cause significant fluctuations in our estimated payment obligations.

     We believe that our working capital, together with cash anticipated to be generated by operations will be sufficient to satisfy our anticipated liquidity requirements for the next twelve months.

Critical Accounting Policies

     The above discussion and analysis of our financial condition and results of operations is based upon our condensed consolidated financial statements, which have been prepared in accordance with accounting principles generally accepted in the United States of America. In preparing our financial statements, we must make estimates and judgments that affect the reported amounts of assets and liabilities, revenues and expenses, and related disclosure of contingent assets and liabilities at the date of our financial statements. Actual results may differ from these estimates under different assumptions or conditions.

     We believe that the following critical accounting policies, as discussed in this Form 10-Q and/or in our Form 10-K for the year ended December 31, 2005, filed with the Securities and Exchange Commission on March 28, 2006, affect our more significant judgments and estimates used in the preparation of our condensed consolidated financial statements:

	•		Revenue recognition
	•		Reserve for warranty
	•		Reserve for excess and obsolete inventory
	•		Stock-based compensation
	•		Commitments and contingencies
	•		Income taxes
	•		Valuation of intangible assets
	•		Long-lived assets including intangible assets subject to amortization

ITEM 3. QUANTITATIVE AND QUALITATIVE DISCLOSURES ABOUT MARKET RISK

     There were no material changes in the Company’s exposure to market risk from December 31, 2005.

ITEM 4. CONTROLS AND PROCEDURES

Evaluation of Disclosure Controls and Procedures

          We maintain disclosure controls and procedures that are designed to ensure that information required to be disclosed in our reports that we file or submit under the Securities Exchange Act of 1934 is recorded, processed, summarized and reported within the time periods specified in the Securities and Exchange Commission’s rules and forms, and that such information is accumulated and communicated to our management, including our Chief Executive Officer and Principal Financial Officer, as appropriate to allow timely decisions regarding required disclosure.

          As of the end of the period covered by this report, we carried out an evaluation, with the participation of management, including our Chief Executive Officer and Principal Financial Officer, of the effectiveness of the disclosure controls and procedures pursuant to the Exchange

Act Rule 13a-15(b). Based upon this evaluation, the Chief Executive Officer and Principal Financial Officer concluded that our disclosure controls and procedures were effective as of March 31, 2006.

Changes in Internal Control over Financial Reporting

     There was no change in our internal control over financial reporting that occurred during our most recent quarter that has materially affected, or is reasonably likely to materially affect, the internal control over financial reporting.

PART II OTHER INFORMATION

ITEM 1. LEGAL PROCEEDINGS

     As disclosed in greater detail in our Annual Report on Form10-K for the year ended December 31, 2005, on June 8, 2005, the Korean Customs Service issued a Pre-Taxation Notification concerning back duties and value added taxes allegedly owed on goods imported by the Company’s Korean subsidiary, Advanced Energy Industries Korea, Inc., during the five year period ended June 8, 2005. During the first quarter of 2006, we were advised that the Korean National Tax Tribunal is expected to schedule a hearing for adjudication of the matter in the third quarter of 2006.

ITEM 1A. RISK FACTORS

     Our business and operating results depend in significant part upon capital expenditures by manufacturers of semiconductors and flat panel displays, which in turn depend upon current and anticipated demand for their products. Historically, these industries have been highly cyclical, with recurring periods of over-supply that have had a negative impact on the demand for capital equipment used to manufacture their products.

     During periods of declining demand, our customers typically reduce purchases of, and cancel orders for, our products and delay delivery of their own products. We may incur significant charges as we seek to align our cost structure with any such reduction in sales to these customers. In addition, we may not be able to respond adequately or quickly to the declining demand by reducing our costs. We may also be required to record significant reserves for excess and obsolete inventory as demand for our products changes. Our inability to reduce costs and the charges resulting from other actions taken in response to changes in demand for our products would adversely affect our business, financial condition and operating results.

Our quarterly and annual operating results fluctuate significantly and are difficult to predict.

     Our operating results may be adversely affected by a variety of factors, many of which are beyond our control and difficult to predict. These factors include:

	•		Fluctuations in demand in the semiconductor, semiconductor capital equipment and flat panel display industries and other industries in which our customers operate;
	•		Reduced sales levels that would decrease our absorption of fixed costs;
	•		The timing and nature of orders placed by our customers;
	•		Cost reduction programs initiated by semiconductor manufacturers and semiconductor capital equipment manufacturers that negatively impact our average selling price, including changes in our customers’ inventory management practices;
	•		Customer cancellation or postponement of previously placed orders;
	•		Pricing competition from our competitors;
	•		Customer requests for us to reduce prices, enhance features, improve reliability, shorten delivery times and extend payment terms;
	•		Unanticipated costs related to our recent transition to China manufacturing and continuing move to lower-cost Asian suppliers;
	•		Component shortages or allocations or other factors that result in delays in manufacturing and sales or result in changes to our inventory levels or cause us to substantially increase our spending on inventory;
	•		Warranty costs in excess of historical rates and our expectations;
	•		Freight costs in excess of historical rates and our expectations;
	•		Increased levels of excess and obsolete inventory, either due to market conditions, the introduction of new products by our competitors, or our decision to discontinue certain product lines;
	•		Increased stock-based compensation expense recorded pursuant to the provisions of SFAS 123(R);
	•		The introduction of new products by us or our competitors;
	•		Changes in macroeconomic conditions;
	•		Litigation, especially regarding intellectual property; and
	•		Currency exchange rate fluctuations. Currently, a 10% adverse change in exchange rates would have approximately a 3% to 4% adverse impact on reported revenues and expenses.

     We have invested significant human and financial resources to establish our manufacturing facility in Shenzhen, China. These investments were made with the goal of reducing our labor costs by increasing our workforce in China and correspondingly decreasing our workforce in the

United States. Because our operating history in Shenzhen is limited, we cannot predict with certainty the impact that this new facility will have on our operating results. We may incur unforeseen costs with respect to this facility and the related workforce.

     We are continuing our transition to purchasing a substantial portion of components for our products from Asian suppliers to lower our materials costs and shipping expenses. These components might require us to incur higher than anticipated testing or repairing costs, which would have an adverse effect on our operating results. Customers, including major customers who have strict and extensive requirements, might not accept our products if they contain these lower-priced components. A delay or refusal by our customers to accept such products might require us to continue to purchase higher-priced components from our existing suppliers or might cause us to lose sales to these customers, which would have an adverse effect on our operating results.

     Our business depends on our ability to manufacture products that meet the rapidly changing demands of our customers. Our ability to manufacture our products timely depends in part on the timely delivery of raw materials, parts, components and subassemblies from suppliers. We rely on sole and limited source suppliers for some of our raw materials, parts, components and subassemblies that are critical to the manufacturing of our products. This reliance involves several potential risks, including the following:

	•		Inability to obtain an adequate supply of required parts, components or subassemblies;
	•		Supply shortages if a sole source provider ceases operations;
	•		Having to fund the operating losses of a sole source provider;
	•		Reduced control over pricing and timing of delivery of raw materials, parts, components or subassemblies;
	•		Need to qualify alternative suppliers which could be time consuming and lead to delays in delivery of products to our customers, as well as increased costs; and
	•		Inability of our suppliers to develop technologically advanced products to support our growth and development of new products.

     If we are unable to successfully qualify additional suppliers and manage relationships with our existing and future suppliers or if our suppliers cannot meet our performance or quality specifications, or timing requirements, we may experience shortages of raw materials, parts, components or subassemblies, increased material costs and shipping delays for our products, which would adversely affect our business, financial condition and operating results and relationships with our current and prospective customers.

A significant portion of our sales is concentrated among a few customers.

     Our ten largest customers accounted for 63% of our total sales in the first quarter 2006 and 59% in the first quarter of 2005. Applied Materials, Inc., our largest customer, accounted for 30% of our sales for the three months ended March 31, 2006 and 25% of our sales for the three months ended March 31, 2005. Novellus Systems, Inc. accounted for 10% of our sales for the three months ended March 31, 2006. Ulvac, Inc., our largest customer in the flat panel display industry, accounted for 12% of our sales for the three months ended March 31, 2005. No other customer accounted for 10% or more of our sales during these periods. The loss of any of our significant customers or a material reduction in any of their purchase orders could significantly harm our business, financial condition and results of operations.

     Our customers continuously exert pressure on us to reduce our prices and extend payment terms. Given the nature of our customer base and the highly competitive markets in which we compete, we may be required to reduce our prices or extend payment terms to remain competitive. We may not be able to reduce our expenses in an amount sufficient to offset potential margin declines.

     As is typical in our industry, our sales are primarily made on a purchase order basis, and we generally have no written long-term purchase commitments from our customers. As a result, we are limited in our ability to predict the level of future sales or commitments from our current customers, which may diminish our ability to effectively allocate labor, materials and equipment in the manufacturing process. In addition, we may accumulate inventory in anticipation of sales that do not materialize resulting in excess and obsolete inventory write-offs.

     Our business strategy for many of our product lines has been focused on product performance and technology innovation to provide enhanced efficiencies and productivity. As a result of recent economic conditions and changes in various markets that we serve, our customers have experienced significant cost pressures and, as a result, we have observed increased price sensitivity on the part of our customers. If competition for any of our product lines should come to focus solely on price rather than on product performance and technology innovation, we will need to adjust our business strategy and product offerings accordingly and, if we are unable to do so, our business, financial condition and operating results could be materially and adversely affected.

The markets in which we operate are highly competitive.

     We face substantial competition, primarily from established companies, some of which have greater financial, marketing and technical resources than we do. We expect our competitors will continue to develop new products in direct competition with ours, improve the design and performance of their products and introduce new products with enhanced performance characteristics.

     To remain competitive, we must improve and expand our products and product offerings. In addition, we may need to maintain a high level of investment in research and development and expand our sales and marketing efforts, particularly outside of the United States. We might not be able to make the technological advances and investments necessary to remain competitive. Our inability to improve and expand our products and product offerings would have an adverse affect on our sales and results of operations.

     Our competitive success often depends upon factors outside of our control. For example, in some cases, particularly with respect to mass flow controller products, semiconductor device and flat panel display manufacturers may direct equipment manufacturers to use a specified supplier’s product in their equipment at a particular facility. Accordingly, for such products, our success will depend in part on our ability to have end users specify that our products be used at their facilities. In addition, we may encounter difficulties in changing established relationships of competitors that already have a large installed base of products within such facilities. If device manufacturers do not specify the use of our products, our sales may be reduced which would negatively affect our business, financial condition and operating results.

     The constantly changing nature of semiconductor fabrication and flat panel display technology causes equipment manufacturers to continually design new systems. We must work with these manufacturers early in their design cycles to modify our equipment or design new equipment to meet the requirements of their new systems. Manufacturers typically choose one or two vendors to provide the components for use with the early system shipments. Selection as one of these vendors is called a design win. It is critical that we achieve these design wins in order to retain existing customers and to obtain new customers.

     We believe that equipment manufacturers often select their suppliers based on factors such as long-term relationships. Accordingly, we may have difficulty achieving design wins from equipment manufacturers who are not currently our customers. In addition, we must compete for design wins for new systems and products of our existing customers, including those with whom we have had long-term relationships. If we are not successful in achieving design wins, our business, financial condition and operating results will be adversely impacted.

     Once a manufacturer chooses a component for use in a particular product, it is likely to retain that component for the life of that product. Our sales and growth could experience material and prolonged adverse effects if we fail to achieve design wins. However, design wins do not always result in substantial sales, as sales of our products are dependent upon our customers’ sales of their products.

     Our sales to customers outside the United States were approximately 41% in the first quarter of 2006 and 49% in the first quarter of 2005. Our success in competing in international markets is subject to our ability to manage various risks and difficulties, including, but not limited to:

	•		Our ability to effectively manage our employees at remote locations who are operating in different business environments from the United States;
	•		Our ability to develop relationships with suppliers and other local businesses;
	•		Compliance with product safety requirements and standards that are different from those of the United States;
	•		Variations in enforcement of intellectual property and contract rights in different jurisdictions;
	•		Trade restrictions, political instability, disruptions in financial markets and deterioration of economic conditions;
	•		The ability to provide sufficient levels of technical support in different locations;
	•		Collecting past due accounts receivable from foreign customers; and
	•		Changes in tariffs, taxes and foreign currency exchange rates.

     Our ability to implement our business strategies, maintain market share and compete successfully in international markets will be compromised if we are unable to manage these and other international risks successfully.

     Currency exchange rate fluctuations could have an adverse effect on our sales and results of operations and we could experience losses with respect to our forward exchange contracts. Unfavorable currency fluctuations could require us to increase prices to foreign customers which could result in lower net sales by us to such customers. Alternatively, if we do not adjust the prices for our products in response to unfavorable currency fluctuations, our operating results could be adversely affected. In addition, most sales made by our foreign subsidiaries are denominated in the currency of the country in which these products are sold and the currency they receive in payment for such sales could be less valuable at the time of receipt as a result of exchange rate fluctuations. We enter into forward exchange contracts and local currency purchased options to reduce currency exposure arising from intercompany sales of inventory. However, we cannot be certain that our efforts will be adequate to protect us against significant currency fluctuations or that such efforts will not expose us to additional exchange rate risks which could adversely affect our operating results.

     The Chinese government is continually pressured by its trading partners to allow its currency to float in a manner similar to other major currencies. The recent revaluation of the yuan has not had a material impact on our operations. Any further change may impact our ability to control the cost of our products in the world market. Specifically, the decision by the Chinese government to allow the yuan to begin to float against the United States dollar could significantly increase the

labor and other costs incurred in the operation of our Shenzhen facility and the cost of raw materials, parts, components and subassemblies that we source in China, thereby negatively affecting our financial condition and operating results.

We are highly dependent on our intellectual property.

     Our success depends significantly on our proprietary technology. We attempt to protect our intellectual property rights through patents and non-disclosure agreements; however, we might not be able to protect our technology, and competitors might be able to develop similar technology independently. In addition, the laws of some foreign countries might not afford our intellectual property the same protections as do the laws of the United States. Our intellectual property is not protected by patents in several countries in which we do business, and we have limited patent protection in other countries, including China. The cost of applying for patents in foreign countries and translating the applications into foreign languages requires us to select carefully the inventions for which we apply for patent protection and the countries in which we seek such protection. Generally, our efforts to obtain international patents have been concentrated in the European Union and certain industrialized countries in Asia, including, Korea, Japan and Taiwan. If we are unable to protect our intellectual property successfully, our business, financial condition and operating results could be adversely affected.

Intellectual property rights are difficult to enforce in China.

     Commercial law in China is relatively undeveloped compared to the commercial law in the United States. Limited protection of intellectual property is available under Chinese law. Consequently, manufacturing our products in China may subject us to an increased risk that unauthorized parties may attempt to copy our products or otherwise obtain or use our intellectual property. We cannot give assurance that we will be able to protect our intellectual property rights effectively or have adequate legal recourse in the event that we encounter infringements of our intellectual property in China.

     Litigation may be necessary to enforce patents issued to us, to protect our trade secrets or know-how, to defend ourselves against claimed infringement of the rights of others or to determine the scope and validity of our proprietary rights or the proprietary rights of others. This type of litigation often requires substantial management time and attention, as well as financial and other resources.

     Future patent litigation might:

	•		Cause us to incur substantial costs in the form of legal fees, fines and royalty payments;
	•		Result in restrictions on our ability to sell certain products;
	•		Result in an inability to prevent others from using technology we have developed; and
	•		Require us to redesign products or seek alternative technologies.

     Any of these events could have a significant adverse effect on our business, financial condition and results of operations.

We are subject to numerous governmental regulations.

     We are subject to federal, state, local and foreign regulations, including environmental regulations and regulations relating to the design and operation of our products and control systems. We might incur significant costs as we seek to ensure that our products meet safety and emissions standards, many of which vary across the states and countries in which our products are used. In the past, we have invested significant resources to redesign our products to comply with these directives. Compliance with future regulations, directives and standards could require us to modify or redesign some products, make capital expenditures or incur substantial costs. If we do not comply with current or future regulations, directives and standards:

	•		We could be subject to fines;
	•		Our production or shipments could be suspended; or
	•		We could be prohibited from offering particular products in specified markets.

     Any inability to comply with current or future regulations, directives and standards could adversely affect our business, financial condition or operating results.

     The stock market has from time to time experienced, and is likely to continue to experience, extreme price and volume fluctuations. Prices of securities of technology companies have been especially volatile and have often fluctuated for reasons that are unrelated to their operating performance. In the past, companies that have experienced volatility in the market price of their stock have been the objects of securities class action litigation. If we were the object of securities class action litigation, it could result in substantial costs and a diversion of our management’s attention and resources.

     Douglas S. Schatz, our Chairman of the Board, beneficially owns approximately 21% of our outstanding common stock as of May 1, 2006. The sale of a substantial amount of the shares owned by him could negatively affect the market price of our common stock. Mr. Schatz, historically, from time to time, has entered into written trading plans pursuant to Rule 10b5-1 under the Securities Exchange Act of 1934, which plans have provided for sales of common stock if price targets and other conditions specified in the plans were met.

     Douglas S. Schatz, our Chairman of the Board, beneficially owns approximately 21% of our outstanding common stock as of May 1, 2006. This stockholding gives Mr. Schatz significant voting power and influence. Depending on the number of shares that abstain or otherwise are not voted on a particular matter, Mr. Schatz may be able to elect all of the members of our board of directors and to control our business affairs for the foreseeable future in a manner with which our other stockholders may not agree.

ITEM 2. UNREGISTERED SALES OF EQUITY SECURITIES AND USE OF PROCEEDS

     Not applicable.

ITEM 3. DEFAULTS UPON SENIOR SECURITIES

     Not applicable.

ITEM 4. SUBMISSION OF MATTERS TO A VOTE OF SECURITY HOLDERS

     None.

ITEM 5. OTHER INFORMATION

     None.

ITEM 6. EXHIBITS

Exhibits:

	31.1		Certification of the Chief Executive Officer Pursuant to Rule 13a-14(a) under the Securities Exchange Act of 1934, as adopted pursuant to Section 302 of the Sarbanes-Oxley Act of 2002
	31.2		Certification of the Principal Financial Officer Pursuant to Rule 13a-14(a) under the Securities Exchange Act of 1934, as adopted pursuant to Section 302 of the Sarbanes-Oxley Act of 2002
	32.1		Certification of the Chief Executive Officer Pursuant to 18 U.S.C. Section 1350, as adopted pursuant to Section 906 of the Sarbanes-Oxley Act of 2002
	32.2		Certification of the Principal Financial Officer Pursuant to 18 U.S.C. Section 1350, as adopted pursuant to Section 906 of the Sarbanes-Oxley Act of 2002

SIGNATURE

     Pursuant to the requirements of the Securities Exchange Act of 1934, the registrant has duly caused this report to be signed on its behalf by the undersigned, thereunto duly authorized.

		ADVANCED ENERGY INDUSTRIES, INC.
Dated: May 3, 2006
		/s/ Mark D. Hartman   Mark D. Hartman
		Principal Financial and Accounting Officer

INDEX TO EXHIBITS

31.1		Certification of the Chief Executive Officer Pursuant to Rule 13a-14(a) under the Securities Exchange Act of 1934, as adopted pursuant to Section 302 of the Sarbanes-Oxley Act of 2002
31.2		Certification of the Chief Financial Officer Pursuant to Rule 13a-14(a) under the Securities Exchange Act of 1934, as adopted pursuant to Section 302 of the Sarbanes-Oxley Act of 2002
32.1		Certification of the Chief Executive Officer Pursuant to 18 U.S.C. Section 1350, as adopted pursuant to Section 906 of the Sarbanes-Oxley Act of 2002
32.2		Certification of the Chief Financial Officer Pursuant to 18 U.S.C. Section 1350, as adopted pursuant to Section 906 of the Sarbanes-Oxley Act of 2002