e10vq
Table of Contents

 
 
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 June 30, 2011
or
     
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: 0-10961
 
QUIDEL CORPORATION
(Exact name of Registrant as specified in its charter)
     
Delaware   94-2573850
(State or other jurisdiction   (I.R.S. Employer
of incorporation or organization)   Identification No.)
10165 McKellar Court, San Diego, California 92121
(Address of principal executive offices, including zip code)
(858) 552-1100
(Registrant’s telephone number, including area code)
Not Applicable
(Former name, former address and former fiscal year, if changed since last report)
 
     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 has submitted electronically and posted on its corporate Web site, if any, every Interactive Data File required to be submitted and posted pursuant to Rule 405 of Regulation S-T during the preceding 12 months (or for such shorter period that the registrant was required to submit and post such files). Yes þ No o
     Indicate by check mark whether the Registrant is a large accelerated filer, an accelerated filer, a non-accelerated filer, or a smaller reporting company. See the definitions of “large accelerated filer,” “accelerated filer” and “smaller reporting company” in Rule 12b-2 of the Exchange Act. (Check one):
             
Large accelerated filer o
  Accelerated filer þ   Non-accelerated filer o (Do not check if a smaller reporting company)   Smaller reporting company 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 July 29, 2011, 33,173,207 shares of common stock were outstanding.
 
 

 


 

INDEX
         
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    6  
    11  
    17  
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    18  
    18  
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    18  
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    18  
    20  
 EX-10.1
 EX-10.2
 EX-31.1
 EX-31.2
 EX-32.1
 EX-101 INSTANCE DOCUMENT
 EX-101 SCHEMA DOCUMENT
 EX-101 CALCULATION LINKBASE DOCUMENT
 EX-101 LABELS LINKBASE DOCUMENT
 EX-101 PRESENTATION LINKBASE DOCUMENT

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PART I FINANCIAL INFORMATION
ITEM 1.   Financial Statements
QUIDEL CORPORATION
CONSOLIDATED BALANCE SHEETS
(in thousands, except par value; unaudited)
                 
    June 30,     December 31,  
    2011     2010  
ASSETS
               
Current assets:
               
Cash and cash equivalents
  $ 65,296     $ 6,788  
Accounts receivable, net
    10,870       13,477  
Inventories
    15,236       17,707  
Deferred tax asset—current
    5,063       7,159  
Income tax receivable
    497       8,344  
Prepaid expenses and other current assets
    2,835       2,552  
 
           
Total current assets
    99,797       56,027  
Property and equipment, net
    31,941       31,755  
Goodwill
    71,013       71,013  
Intangible assets, net
    50,094       53,675  
Other non-current assets
    1,413       2,123  
 
           
Total assets
  $ 254,258     $ 214,593  
 
           
LIABILITIES AND STOCKHOLDERS’ EQUITY
               
Current liabilities:
               
Accounts payable
  $ 3,630     $ 4,715  
Accrued payroll and related expenses
    4,655       3,013  
Accrued royalties
    1,727       2,262  
Current portion of lease obligation
    303       280  
Other current liabilities
    5,234       5,507  
 
           
Total current liabilities
    15,549       15,777  
Long term debt
    43,391       73,498  
Lease obligation, net of current portion
    6,117       6,276  
Deferred tax liability—non-current
    3,750       2,313  
Income taxes payable
    2,829       2,937  
Other non-current liabilities
    1,100       1,271  
Commitments and contingencies
               
Stockholders’ equity:
               
Preferred stock, $.001 par value per share; 5,000 shares authorized; none issued or outstanding at June 30, 2011 and December 31, 2010
           
Common stock, $.001 par value per share; 50,000 shares authorized; 33,175 and 28,514 shares issued and outstanding at June 30, 2011 and December 31, 2010, respectively
    33       29  
Additional paid-in capital
    171,011       109,802  
Retained earnings
    10,478       2,690  
 
           
Total stockholders’ equity
    181,522       112,521  
 
           
Total liabilities and stockholders’ equity
  $ 254,258     $ 214,593  
 
           
See accompanying notes.

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QUIDEL CORPORATION
CONSOLIDATED STATEMENTS OF OPERATIONS
(in thousands, except per share data; unaudited)
                                 
    Three months ended     Six months ended  
    June 30,     June 30,  
    2011     2010     2011     2010  
Total revenues
  $ 27,509     $ 25,026     $ 87,104     $ 53,405  
Costs and expenses
                               
Cost of sales (excludes amortization of intangible assets of $1.7 million, $1.6 million, $3.3 million and $2.4 million, respectively)
    12,540       12,237       32,583       24,871  
Amortization of inventory fair value adjustment from acquisition
          399             1,118  
 
                       
Total cost of sales (excludes amortization of intangible assets of $1.7 million, $1.6 million, $3.3 million and $2.4 million, respectively)
    12,540       12,636       32,583       25,989  
Research and development
    6,450       6,349       14,264       12,624  
Sales and marketing
    6,254       6,272       12,509       12,271  
General and administrative
    5,593       4,792       11,352       9,033  
Amortization of intangible assets from acquired businesses
    1,631       1,467       3,263       2,119  
Amortization of intangible assets from licensed technology
    144       324       288       648  
Business acquisition and integration costs, and restructuring charges
          716             2,066  
 
                       
Total costs and expenses
    32,612       32,556       74,259       64,750  
 
                       
Operating (loss) income
    (5,103 )     (7,530 )     12,845       (11,345 )
Other (expense) income
                               
Interest income
    57       11       109       180  
Interest expense
    (499 )     (611 )     (1,154 )     (1,010 )
 
                       
Total other expense
    (442 )     (600 )     (1,045 )     (830 )
 
                       
(Loss) income before taxes
    (5,545 )     (8,130 )     11,800       (12,175 )
(Benefit) provision for income taxes
    (1,885 )     (5,663 )     4,012       (7,191 )
 
                       
Net (loss) income
  $ (3,660 )   $ (2,467 )   $ 7,788     $ (4,984 )
 
                       
Basic (loss) earnings per share
  $ (0.11 )   $ (0.09 )   $ 0.24     $ (0.18 )
Diluted (loss) earnings per share
  $ (0.11 )   $ (0.09 )   $ 0.24     $ (0.18 )
Shares used in basic per share calculation
    32,900       28,406       32,675       28,457  
Shares used in diluted per share calculation
    32,900       28,406       33,110       28,457  
See accompanying notes.

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QUIDEL CORPORATION
CONSOLIDATED STATEMENTS OF CASH FLOWS
(in thousands; unaudited)
                 
    Six months ended  
    June 30,  
    2011     2010  
OPERATING ACTIVITIES:
               
Net income (loss)
  $ 7,788     $ (4,984 )
Adjustments to reconcile net income (loss) to net cash provided by (used for) operating activities:
               
Depreciation, amortization and other
    6,765       5,455  
Gain on sale of assets
    2       2  
Stock-based compensation expense
    3,685       2,625  
Change in deferred tax assets and liabilities
    3,533       (7,159 )
Changes in assets and liabilities:
               
Accounts receivable
    2,607       6,321  
Inventories
    2,471       209  
Income tax receivable
    7,847       840  
Prepaid expenses and other current assets
    (283 )     110  
Accounts payable
    (1,241 )     (1,461 )
Accrued payroll and related expenses
    1,635       (1,369 )
Accrued royalties
    (535 )     (4,127 )
Accrued income taxes payable
    (108 )     (6,151 )
Other current and non-current liabilities
    (437 )     (4,368 )
 
           
Net cash provided by (used for) operating activities
    33,729       (14,057 )
 
           
 
               
INVESTING ACTIVITIES:
               
Acquisitions of property and equipment
    (2,956 )     (2,325 )
Purchase of business, net of cash acquired of $3.1 million
          (128,093 )
Proceeds from sale of marketable securities
          3,999  
Other assets
    (28 )     (225 )
 
           
Net cash used for investing activities
    (2,984 )     (126,644 )
 
           
 
               
FINANCING ACTIVITIES:
               
Payments on lease obligation
    (136 )     (100 )
Purchases of common stock
    (625 )     (9,181 )
Borrowing from line of credit
          75,000  
Payments on line of credit
    (30,000 )      
Issuance of common stock, net of cancellations
    58,815       878  
Other
    (291 )     (68 )
 
           
Net cash provided by financing activities
    27,763       66,529  
 
           
Net increase (decrease) in cash and cash equivalents
    58,508       (74,172 )
Cash and cash equivalents, beginning of period
    6,788       89,003  
 
           
Cash and cash equivalents, end of period
  $ 65,296     $ 14,831  
 
           
 
               
SUPPLEMENTAL DISCLOSURES OF CASH FLOW INFORMATION:
               
Cash paid during the period for interest
  $ 1,154     $ 1,011  
 
           
Cash paid during the period for income taxes
  $ 120     $ 6,500  
 
           
 
               
NON-CASH INVESTING ACTIVITIES:
               
Purchase of capital equipment by incurring current liabilities
  $ 156     $ 436  
 
           
See accompanying notes.

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Quidel Corporation
Notes to Consolidated Financial Statements
(Unaudited)
Note 1. Basis of Presentation
     The accompanying unaudited consolidated financial statements of Quidel Corporation and its subsidiaries (the “Company”) have been prepared in accordance with generally accepted accounting principles in the U.S. for interim financial information and with the instructions to Form 10-Q and Article 10 of Regulation S-X. Accordingly, they do not include all of the information and footnotes required by accounting principles generally accepted in the U.S. for complete financial statements. Certain reclassifications have been made to prior year amounts to conform to the current year presentation. In the opinion of management, all adjustments considered necessary for a fair presentation (consisting of normal recurring accruals) have been included. The information at June 30, 2011, and for the three and six months ended June 30, 2011 and 2010, is unaudited. Operating results for the three and six months ended June 30, 2011 are not necessarily indicative of the results that may be expected for the year ending December 31, 2011. For further information, refer to the Company’s consolidated financial statements and footnotes thereto for the year ended December 31, 2010 included in the Company’s 2010 Annual Report on Form 10-K. Subsequent events have been evaluated up to and including the date these financial statements were issued.
     For 2011 and 2010, the Company’s fiscal year will or has ended on January 1, 2012 and January 2, 2011, respectively. For 2011 and 2010, the Company’s second quarter ended on July 3, 2011 and July 4, 2010, respectively. For ease of reference, the calendar quarter end dates are used herein. The three and six month periods ended June 30, 2011 and 2010 both included 13 and 26 weeks, respectively.
Note 2. Comprehensive Income (Loss)
     Net income (loss) is equal to comprehensive income (loss) for the three and six months ended June 30, 2011 and 2010, respectively.
Note 3. Computation of (Loss) Earnings Per Share
     Basic (loss) earnings per share was computed by dividing net (loss) earnings by the weighted-average number of common shares outstanding, including vested restricted stock awards, during the period. Diluted earnings per share reflects the potential dilution that would occur if net earnings were divided by the weighted-average number of common shares and potentially dilutive common shares from outstanding stock options as well as unvested, time-based restricted stock awards. Potentially dilutive common shares were calculated using the treasury stock method and represent incremental shares issuable upon exercise of the Company’s outstanding stock options and unvested, time-based restricted stock awards. The Company has awarded restricted stock with both time-based as well as performance-based vesting provisions. Stock awards based on only performance conditions are not included in the calculation of basic or diluted earnings per share until the performance criteria are met. For periods in which the Company incurs losses, potentially dilutive shares are not considered in the calculation of net loss per share, as their impact would be anti-dilutive. For periods in which the Company has earnings, out-of-the-money stock options (i.e., the average stock price during the period is below the exercise price of the stock option) are not included in diluted earnings per share as their effect would be anti-dilutive. For the three months ended June 30, 2011 and 2010, and the six months ended June 30, 2011 and 2010, 1.9 million, 2.8 million, 2.0 million, and 2.7 million shares were excluded from the calculation of diluted (loss) earnings per share as their effect was anti-dilutive, respectively.
     The following table reconciles the weighted-average shares used in computing basic and diluted (loss) earnings per share in the respective periods (in thousands):
                                 
    Three months     Six months  
    ended     ended  
    June 30,     June 30,  
    2011     2010     2011     2010  
Shares used in basic (loss) earnings per share (weighted-average common shares outstanding)
    32,900       28,406       32,675       28,457  
Effect of dilutive stock options and restricted stock awards
                435        
 
                       
Shares used in diluted (loss) earnings per share calculation
    32,900       28,406       33,110       28,457  
 
                       

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Quidel Corporation
Notes to Consolidated Financial Statements (Continued)
(Unaudited)
Note 4. Inventories
     Inventories are recorded at the lower of cost (first-in, first-out) or market and consist of the following (in thousands):
                 
    June 30,     December 31,  
    2011     2010  
Raw materials
  $ 6,712     $ 7,262  
Work-in-process (materials, labor and overhead)
    4,619       5,375  
Finished goods (materials, labor and overhead)
    3,905       5,070  
 
           
 
  $ 15,236     $ 17,707  
 
           
Note 5. Other Current Liabilities
     Other current liabilities consist of the following (in thousands):
                 
    June 30,     December 31,  
    2011     2010  
Accrued liability for technology licenses
  $ 1,900     $ 2,300  
Customer incentives
    2,007       1,740  
Current portion of note payable to state agency
    212       211  
Other
    1,115       1,256  
 
           
 
  $ 5,234     $ 5,507  
 
           
Note 6. Income Taxes
     The Company’s effective tax rate for the six months ended June 30, 2011 and 2010 was 34.0% and 59.1%, respectively. The Company recognized tax expense of $4.0 million and a tax benefit of $7.2 million for the six months ended June 30, 2011 and 2010, respectively. The difference between the June 30, 2011 and June 30, 2010 effective tax rate is primarily due to the exclusion of the federal research and development tax credit and certain acquisition related non-deductible transaction costs during the first six months of 2010.
     The Company is subject to periodic audits by domestic and foreign tax authorities. The Company’s federal tax years for 1995 and forward are subject to examination by the U.S. authorities due to the carry forward of unutilized net operating losses and research and development credits. With few exceptions, the Company’s tax years for 1999 and forward are subject to examination by state and foreign tax authorities. The Company believes that it has appropriate support for the income tax positions taken on its tax returns and that its accruals for tax liabilities are adequate for all open years based on its assessment of many factors, including past experience and interpretations of tax law applied to the facts of each matter.
Note 7. Line of Credit
     The Company currently has a $120.0 million senior secured syndicated credit facility (the “Senior Credit Facility”), which matures on October 8, 2013. The Senior Credit Facility bears interest for base rate loans at a rate equal to (i) the higher of (a) the lender’s prime rate and (b) the Federal funds rate plus one-half of one percent, plus (ii) the applicable rate, or for Eurodollar rate loans the interest rate is equal to (i) the Eurodollar rate, plus (ii) the applicable rate. The applicable rate is generally determined in accordance with a performance pricing grid based on the Company’s leverage ratio and ranges from 0.50% to 1.75% for base rate loans and from 1.50% to 2.75% for Eurodollar rate loans. The agreement governing the Senior Credit Facility is

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Quidel Corporation
Notes to Consolidated Financial Statements (Continued)
(Unaudited)
Note 7. Line of Credit (Continued)
subject to certain customary limitations, including among others: limitation on liens; limitation on mergers, consolidations and sales of assets; limitation on debt; limitation on dividends, stock redemptions and the redemption and/or prepayment of other debt; limitation on investments (including loans and advances) and acquisitions; limitation on transactions with affiliates; and limitation on annual capital expenditures. The Company is also subject to financial covenants which include a funded debt to EBITDA ratio (as defined in the Senior Credit Facility, with adjusted EBITDA generally calculated as earnings before, among other adjustments, interest, taxes, depreciation and amortization) not to exceed 3 to 1 as of the end of each fiscal quarter, and an interest coverage ratio of not less than 3.5 to 1 as of the end of each fiscal quarter. The Senior Credit Facility is secured by substantially all present and future assets and properties of the Company. As of June 30, 2011, the Company had $37.0 million available under the Senior Credit Facility. The Company’s ability to borrow under the Senior Credit Facility fluctuates from time to time due to, among other factors, the Company’s borrowings under the facility and its funded debt to adjusted EBITDA ratio. At June 30, 2011, the Company had $42.0 million outstanding under the Senior Credit Facility which was borrowed in connection with the acquisition of Diagnostics Hybirds, Inc. (“DHI”). At June 30, 2011, the Company was in compliance with all covenants.
Note 8. Stockholders’ Equity
     In January 2011, the Company completed a public offering of 4.6 million shares of its common stock at $13.15 per share. The Company received proceeds, net of underwriting discounts and commissions, of $57.9 million ($12.43 per share) and incurred approximately $0.7 million in related offering expenses. The Company has and expects to continue to use the net proceeds of this offering for working capital and other general corporate purposes, which may potentially include the acquisition or development of new technology, the acquisition of diagnostic or related companies, products or businesses or the repayment of existing indebtedness.
     During the six months ended June 30, 2011, 204,113 shares of restricted stock were awarded, 11,051 shares of restricted stock were cancelled, 48,356 shares of common stock were issued due to the exercise of stock options and 26,928 shares of common stock were issued in connection with the Company’s employee stock purchase plan (the “ESPP”), resulting in net proceeds to the Company of approximately $0.6 million. Additionally, during the six months ended June 30, 2011, 42,423 shares of outstanding common stock were repurchased for approximately $0.6 million, which represent shares repurchased in connection with payment of minimum tax withholding obligations for certain employees relating to the lapse of restrictions on certain restricted stock awards during the six months ended June 30, 2011.

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Quidel Corporation
Notes to Consolidated Financial Statements (Continued)
(Unaudited)
Note 9. Stock-Based Compensation
     The compensation expense related to the Company’s stock-based compensation plans included in the accompanying Consolidated Statements of Operations for the three and six months ended June 30, 2011 and 2010 was as follows (in millions):
                                 
    Three months     Six months  
    ended     ended  
    June 30,     June 30,  
    2011     2010     2011     2010  
Cost of sales
  $ 0.2     $ 0.2     $ 0.3     $ 0.3  
Research and development
    0.2       0.1       0.4       0.3  
Sales and marketing
    0.1       0.1       0.1       0.2  
General and administrative
    1.4       1.0       2.9       1.8  
 
                       
 
  $ 1.9     $ 1.4     $ 3.7     $ 2.6  
 
                       
     Total compensation expense recognized for the three months ended June 30, 2011 and 2010 includes $1.2 million and $1.1 million related to stock options and $0.7 million and $0.3 million related to restricted stock, respectively. Total compensation expense recognized for the six months ended June 30, 2011 and 2010 includes $2.6 million and $2.0 million related to stock options and $1.1 million and $0.6 million related to restricted stock, respectively. As of June 30, 2011, total unrecognized compensation expense related to non-vested stock options was $5.5 million, which is expected to be recognized over a weighted-average period of approximately 2.4 years. As of June 30, 2011, total unrecognized compensation expense related to non-vested restricted stock was $2.7 million, which is expected to be recognized over a weighted-average period of approximately 2.3 years. Compensation expense capitalized to inventory and compensation expense related to the Company’s ESPP were not material for the three and six months ended June 30, 2011 and 2010.
     The estimated fair value of each stock option award was determined on the date of grant using the Black-Scholes option valuation model with the following weighted-average assumptions for the option grants.
                 
    Six months
    ended
    June 30,
    2011   2010
Expected option life (in years)
    5.22       4.89  
Volatility rate
    0.47       0.52  
Risk-free interest rate
    2.10 %     2.40 %
Forfeiture rate
    14.0 %     15.5 %
Dividend rate
    0 %     0 %
     The weighted-average grant date fair value of stock options granted during the six months ended June 30, 2011 and 2010 was $5.72 and $6.86, respectively. The grant date fair value of restricted stock is determined based on the closing market price of the Company’s common stock on the grant date.
Note 10. Industry and Geographic Information
     The Company operates in one reportable segment. Sales to customers outside the U.S. represented $9.2 million (11%) and $10.7 million (20%) of total revenue for the six months ended June 30, 2011 and 2010, respectively. As of June 30, 2011 and December 31, 2010, balances due from foreign customers were $2.0 million and $1.5 million, respectively.

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Quidel Corporation
Notes to Consolidated Financial Statements (Continued)
(Unaudited)
Note 10. Industry and Geographic Information (Continued)
     The Company had sales to individual customers in excess of 10% of total revenue, as follows:
                 
    Six months  
    ended  
    June 30,  
    2011     2010  
Customer:
               
A
    15 %     12 %
B
    12 %     2 %
 
           
 
    27 %     14 %
 
           
     As of June 30, 2011, accounts receivable from customers with balances due in excess of 10% of total accounts receivable totaled $2.4 million while, at December 31, 2010, accounts receivable from customers with balances due in excess of 10% of total accounts receivable totaled $3.2 million.
Note 11. Lease Obligation
     During 1999, the Company completed a sale and leaseback transaction of its approximately 78,000 square-foot executive, administrative, manufacturing and research and development facility in San Diego. The facility was sold for $15.0 million, of which $3.8 million was capital contributed by the Company. The sale was an all cash transaction, netting the Company approximately $7.0 million. The Company is a 25% limited partner in the partnership that acquired the facility. The transaction was deemed a financing transaction under the guidance in ASC Topic 840-40, Accounting for Sales of Real Estate. The assets sold remain on the books of the Company and will continue to be depreciated over the estimated useful life. The Company’s lease was initially for 15 years, with options to extend the lease for up to two additional five-year periods.
     In December 2009, the Company amended the terms of its lease agreement which had no significant impact on the Company’s financial statements. The amended terms include a new ten-year lease term through December 2019, with options to extend the lease for up to three additional five-year periods. The Company will amortize the lease obligation over this new term. The amount of the monthly rental payments remain the same under the amendment. In addition, the Company has the option to purchase the general partner’s interest in the partnership in January 2015 for a fixed price. The Company has determined that the partnership is a variable interest entity (VIE). The Company is not, however, the primary beneficiary of the VIE as it does not absorb the majority of the partnership’s expected losses or receive a majority of the partnership’s residual returns. The Company made lease payments to the partnership in connection with the San Diego facility of approximately $0.5 million for each of the six months ended June 30, 2011 and 2010.
Note 12. Fair Value Measurement
     The Company’s valuation techniques are based on observable and unobservable inputs. Observable inputs reflect readily obtainable data from independent sources, while unobservable inputs are generally developed internally, utilizing management’s estimates, assumptions and specific knowledge of the assets/liabilities and related market assumptions. The fair value of our cash equivalents are determined based on Level 1 inputs, which consist of quoted prices in active markets for identical assets.

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ITEM 2. Management’s Discussion and Analysis of Financial Condition and Results of Operations
     In this quarterly report, all references to “we,” “our” and “us” refer to Quidel Corporation and its subsidiaries.
Future Uncertainties and Forward-Looking Statements
     This Quarterly Report on Form 10-Q contains forward-looking statements within the meaning of the federal securities laws that involve material risks, assumptions and uncertainties. Many possible events or factors could affect our future financial results and performance, such that our actual results and performance may differ materially from those that may be described or implied in the forward-looking statements. As such no forward-looking statement can be guaranteed. Differences in actual results and performance may arise as a result of a number of factors including, without limitation, seasonality, the timing of onset, length and severity of cold and flu seasons, the level of success in executing on our strategic initiatives, our reliance on sales of our influenza diagnostic tests, uncertainty surrounding the detection of novel influenza viruses involving human specimens, our ability to develop new products and technology, adverse changes in the competitive and economic conditions in domestic and international markets, our reliance on and actions of our major distributors, technological changes and uncertainty with research and technology development, including any future molecular-based technology, the medical reimbursement system currently in place and future changes to that system, manufacturing and production delays or difficulties, adverse regulatory actions or delays in product reviews by the U.S. Food and Drug Administration (the “FDA”), compliance with FDA and environmental regulations, our ability to meet unexpected increases in demand for our products, our ability to execute our growth strategy, including the integration of new companies or technologies, disruptions in the global capital and credit markets, our ability to hire key personnel, intellectual property, product liability, environmental or other litigation, potential required patent license fee payments not currently reflected in our costs, potential inadequacy of booked reserves and possible impairment of goodwill, and lower than anticipated acceptance, sales or market penetration of our new products. Forward-looking statements typically are identified by the use of terms such as “may,” “will,” “should,” “might,” “expect,” “anticipate,” “estimate,” and similar words, although some forward-looking statements are expressed differently. Forward-looking statements in this Quarterly Report include, among others, statements concerning: our outlook for the upcoming fiscal year, including projections about our revenue, gross margins, expenses, and the effect the DHI acquisition will have on the seasonality of our business; projected capital expenditures for the upcoming fiscal year and our source of funds for such expenditures; the sufficiency of our liquidity and capital resources; the future impact of deferred tax assets or liabilities; the expected vesting periods of unrecognized compensation expense; and our intention to maintain our emphasis on research and development and continue to evaluate technology and Company acquisition opportunities and the source of funds for such investments. The risks described under “Risk Factors” in Item 1A of this Report on Form 10-Q and our Annual Report on Form 10-K for the year ended December 31, 2010, and elsewhere herein and in reports and registration statements that we file with the Securities and Exchange Commission (the “SEC”) from time to time, should be carefully considered. You are cautioned not to place undue reliance on these forward-looking statements, which reflect management’s analysis only as of the date of this Quarterly Report. The following should be read in conjunction with the audited Consolidated Financial Statements and Notes thereto beginning on page 3 of this Quarterly Report. We undertake no obligation to publicly release the results of any revision or update of these forward-looking statements, except as required by law.
Overview
     We have a leadership position in the development, manufacturing and marketing of rapid diagnostic testing solutions. These diagnostic testing solutions primarily include applications in infectious diseases, women’s health and gastrointestinal diseases. We sell our products directly to end users and distributors, in each case, for professional use in physician offices, hospitals, clinical laboratories, reference laboratories, leading universities, retail clinics and wellness screening centers. We market our products in the U.S. through a network of national and regional distributors, and a direct sales force. Internationally, we sell and market primarily in Japan and Europe through distributor arrangements.
     In January 2011, we completed a public offering of 4.6 million shares of our common stock at $13.15 per share. We received proceeds, net of underwriting discounts and commissions, of $57.9 million ($12.43 per share) and incurred approximately $0.7 million in related offering expenses. We have and expect to continue to use the net proceeds of this offering for working capital and other general corporate purposes, which may potentially include the acquisition or development of new technology, the acquisition of diagnostic or related companies, products or businesses or the repayment of existing indebtedness.

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Outlook
     We had a more normalized cold and flu season for the six months ended June 30, 2011, resulting in significant sales of our influenza, strep and respiratory products as compared to a lack of an influenza season in the first six months of 2010. We expect gross margins will trend higher year over year as a result of a more favorable product mix shift that includes higher influenza sales in fiscal year 2011 compared to fiscal year 2010, which was adversely impacted by the lack of an influenza season in the first quarter of 2010. The acquisition of DHI continues to build upon and diversify our revenue base and we expect the acquisition to lessen the effect of seasonality on our business quarter to quarter. We will continue our focus on prudently managing our business and delivering solid financial results, while at the same time continuing to introduce new products to the market and maintaining our emphasis on research and development investments for longer term growth. Finally, we will continue to evaluate opportunities to acquire new product lines and technologies, as well as company acquisitions.
Results of Operations
Three months ended June 30, 2011 compared to the three months ended June 30, 2010
Total Revenues
     The following table compares total revenues for the three months ended June 30, 2011 and 2010 (in thousands, except percentages):
                                 
    For the three months        
    ended June 30,     Increase (Decrease)  
    2011     2010     $     %  
Infectious disease net product sales
  $ 15,249     $ 13,899     $ 1,350       10 %
Women’s health net product sales
    8,426       8,358       68       1 %
Gastrointestinal disease net product sales
    1,817       1,561       256       16 %
Other net product sales
    1,427       564       863       153 %
Royalty, license fees and grant revenue
    590       644       (54 )     (8 )%
 
                         
Total revenues
  $ 27,509     $ 25,026     $ 2,483       10 %
 
                         
     The increase in total revenues was primarily due to increased unit sales of our Group A strep products. In addition, we had higher unit sales of our veterinary products, largely due to the timing of orders.
     The revenue from our royalty, license fees and grant revenue category for all periods primarily relates to royalty payments earned on our patented technologies utilized by third parties.
Cost of Sales
     Cost of sales was $12.5 million, or 46% of total revenues for the three months ended June 30, 2011, compared to $12.6 million, or 50% of total revenues for the three months ended June 30, 2010. The absolute dollar decrease reflects acquisition related synergies for decreased material costs and freight rates associated with leveraging our combined volume, and reduced overhead costs and scrap at DHI. The decrease in cost of sales as a percentage of total revenue was primarily due to indirect cost leverage related to increased unit volume, the improved cost structure noted above, as well as the amortization of an inventory fair value adjustment for the three months ended June 30, 2010 associated with the acquisition of DHI.

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Operating Expenses
     The following table compares operating expenses for the three months ended June 30, 2011 and 2010 (in thousands, except percentages):
                                                 
    For the three months    
    ended June 30,    
    2011   2010   Increase (Decrease)
            As a % of           As a % of    
    Operating   total   Operating   total  
    expenses   revenues   expenses   revenues   $   %
Research and development
  $ 6,450       23 %   $ 6,349       25 %   $ 101       2 %
Sales and marketing
    6,254       23 %     6,272       25 %     (18 )     0 %
General and administrative
    5,593       20 %     4,792       19 %     801       17 %
Amortization of intangible assets from acquired businesses
    1,631       6 %     1,467       6 %     164       11 %
Amortization of intangible assets from licensed technology
    144       1 %     324       1 %     (180 )     (56 )%
Business acquisition and integration costs, and restructuring charges
                716       3 %     (716 )     (100 )%
General and Administrative Expense
     The increase in general and administrative expenses is primarily due to accrued bonuses for the three months ended June 30, 2011 as compared to none for the prior year, and higher stock compensation expense related to two and three year cliff vesting occurring during the three months ended June 30, 2011.
Amortization of Intangible Assets from Acquired Businesses
     Amortization of intangible assets from acquired businesses consists of customer relationships, purchased technology and patents and trademarks acquired in connection with our acquisition of DHI.
Amortization of Intangible Assets from Licensed Technology
     Amortization of intangible assets from licensed technology consists primarily of expense associated with purchased technology.
Business Acquisition and Integration Costs, and Restructuring Charges
     We incurred $0.7 million in expenses in the second quarter of 2010 primarily related to professional fees for the DHI acquisition and integration activities.
Other Income (Expense)
     The increase in interest income is related to the increase in our average cash balance during the three months ended June 30, 2011 as compared to the three months ended June 30, 2010, partially offset by a decrease in the average interest rate. Interest expense primarily relates to interest paid on borrowings under the Senior Credit Facility and interest paid on our lease obligation associated with our San Diego facility.
Income Taxes
     For the three months ended June 30, 2011 and June 30, 2010, our expected annual effective tax rate was 34.0% and 69.7%, respectively. We recognized a tax (benefit) expense of $(1.9) million and $5.7 million for the three months ended June 30, 2011 and 2010, respectively. The difference in the effective tax rate between June 30, 2011 and June 30, 2010 is primarily due to the exclusion of the federal research and development tax credit and certain acquisition related non-deductible transaction costs during the first quarter of 2010.
Six months ended June 30, 2011 compared to the six months ended June 30, 2010
Total Revenues
     During the first quarter of 2010, in connection with the acquisition of DHI, we changed our disease state classifications within our one reportable segment to better reflect current business activities and taking into account the products sold by DHI. The information for all prior periods presented has been restated to conform to the current

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presentation. The following table compares total revenues for the six months ended June 30, 2011 and 2010 (in thousands, except percentages):
                                 
    For the six months        
    ended June 30,     Increase (Decrease)  
    2011     2010     $     %  
Infectious disease net product sales
  $ 62,898     $ 31,290     $ 31,608       101 %
Women’s health net product sales
    16,412       15,996       416       3 %
Gastrointestinal disease net product sales
    3,536       2,622       914       35 %
Other net product sales
    3,019       2,455       564       23 %
Royalty, license fees and grant revenue
    1,239       1,042       197       19 %
 
                         
Total revenues
  $ 87,104     $ 53,405     $ 33,699       63 %
 
                         
     The increase in total revenues was primarily due to a more normalized cold and flu season in 2011 and the related increase in unit sales of our influenza and Group A strep products, as compared to the lack of an influenza season in the first quarter of 2010. Also, the first quarter 2011 includes a full quarter of revenues from the DHI acquisition compared to the first quarter of 2010 that does not include $5.7 million of DHI pre-acquisition revenues.
     The revenue from our royalty, license fees and grant revenue category for all periods primarily relate to royalty payments earned on our patented technologies utilized by third parties.
Cost of Sales
     Cost of sales increased 25% to $32.6 million, or 37% of total revenues for the six months ended June 30, 2011, compared to $26.0 million, or 49% of total revenues for the six months ended June 30, 2010. The absolute dollar increase in cost of sales is primarily related to the variable nature of direct costs (material and labor) associated with the 63% increase in total revenues. Partially offsetting this increase are acquisition related synergies including certain decreased material costs and freight rates associated with leveraging our combined volume, and reduced overhead costs and scrap at DHI. The decrease in cost of sales as a percentage of total revenue was primarily related to a more favorable product mix, as well as the improved cost structure noted above as well as the amortization of an inventory fair value adjustment for the six months ended June 30, 2010 associated with our acquisition of DHI.
Operating Expenses
     The following table compares operating expenses for the six months ended June 30, 2011 and 2010 (in thousands, except percentages):
                                                 
    For the six months    
    ended June 30,    
    2011   2010   Increase (Decrease)
            As a % of           As a % of    
    Operating   total   Operating   total  
    expenses   revenues   expenses   revenues   $   %
Research and development
  $ 14,264       16 %   $ 12,624       24 %   $ 1,640       13 %
Sales and marketing
    12,509       14 %     12,271       23 %     238       2 %
General and administrative
    11,352       13 %     9,033       17 %     2,319       26 %
Amortization of intangible assets from acquired businesses
    3,263       4 %     2,119       4 %     1,144       54 %
Amortization of intangible assets from licensed technology
    288       0 %     648       1 %     (360 )     (56 )%
Business acquisition and integration costs, and restructuring charges
                2,066       4 %     (2,066 )     (100 )%
Research and Development Expense
     Research and development expense for the six months ended June 30, 2011 includes a full six months of expense from the DHI acquisition compared to the first quarter of 2010 that does not include $1.5 million of DHI pre-acquisition expenses.

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Sales and Marketing Expense
     Sales and marketing expense for the six months ended June 30, 2011 includes a full six months of expense from the DHI acquisition compared to the first quarter of 2010 that does not include $0.5 million of DHI pre-acquisition expenses. Additionally, there is a decrease in the first quarter of 2011 of product promotions and market research, partially offset by higher overall compensation costs related to the contract sales organization directly tied to Thyretain sales efforts and increased product shipment costs associated with higher sales volume in 2011. Other key components of this expense relate to continued investment in assessing future product extensions and enhancements and market research.
General and Administrative Expense
     General and administrative expense for six months ended June 30, 2011 includes a full six months of expense from the DHI acquisition compared to the first quarter of 2010 that does not include $0.7 million of DHI pre-acquisition expenses. There was also an increase in incentive and stock compensation in 2011.
Amortization of Intangible Assets from Acquired Businesses
     Amortization of intangible assets from acquired businesses consists of customer relationships, purchased technology and patents and trademarks acquired in connection with the acquisition of DHI.
Amortization of Intangible Assets from Licensed Technology
     Amortization of intangible assets from licensed technology consists primarily of expense associated with purchased technology.
Business Acquisition and Integration Costs, and Restructuring Charges
     We incurred $2.1 million in expenses for the six months ended June 30, 2010 primarily related to professional fees for the DHI acquisition and integration activities.
Other Income (Expense)
     The decrease in interest income is related to the decrease in the average interest rate and a decrease in our average cash balance during the six months ended June 30, 2011 as compared to the six months ended June 30, 2010. Interest expense primarily relates to interest paid on borrowings under the Senior Credit Facility and interest paid on our lease obligation associated with our San Diego facility.
Income Taxes
     The effective tax rate for the six months ended June 30, 2011 and 2010 was 34.0% and 59.1%, respectively. The Company recognized tax expense of $4.0 million and a tax benefit of $7.2 million for the six months ended June 30, 2011 and 2010, respectively. The difference between the June 30, 2011 and June 30, 2010 effective tax rate is primarily due to the exclusion of the federal research and development tax credit and certain acquisition related non-deductible transaction costs during the 2010 period.
Liquidity and Capital Resources
     As of June 30, 2011, our principal sources of liquidity consisted of $65.3 million in cash and cash equivalents, as well as $37.0 million available to us under our Senior Credit Facility. Our working capital as of June 30, 2011 was $84.2 million.
     Cash provided by operating activities was $33.7 million during the six months ended June 30, 2011. We had net earnings of $7.8 million, including non-cash charges of $10.5 million of depreciation and amortization of intangible assets and property and equipment, and stock-based compensation. Other changes in operating assets and liabilities included a decrease in accounts receivable, inventory and income tax receivable of $2.6 million, $2.5 million and $7.8 million, respectively. The decrease in accounts receivable and inventory are related to the seasonal nature of our business, while the decrease in income tax receivable is due to a tax refund during the quarter.

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     Our investing activities used $3.0 million during the six months ended June 30, 2011 related to the acquisition of production and scientific equipment, and building improvements.
     We are planning approximately $5.0 million in capital expenditures for the remainder of 2011. The primary purpose for our capital expenditures is to acquire manufacturing and scientific equipment, implement facility improvements, and for the purchase or development of information technology. We plan to fund these capital expenditures with cash flow from operations and other available sources of liquidity. We have $0.9 million in firm purchase commitments with respect to such planned capital expenditures as of the date of filing this report.
     Our financing activities generated $27.8 million of cash during the six months ended June 30, 2011. This was primarily related to proceeds from the sale of our common stock, partly offset by repayments made under the Senior Credit Facility, both occurring during the first quarter of 2011.
     Our $120.0 million Senior Credit Facility matures on October 8, 2013. The Senior Credit Facility bears interest for base rate loans at a rate equal to (i) the higher of (a) the lender’s prime rate and (b) the Federal funds rate plus one-half of one percent, plus (ii) the applicable rate, or for Eurodollar rate loans the interest rate is equal to (i) the Eurodollar rate, plus (ii) the applicable rate. The applicable rate is generally determined in accordance with a performance pricing grid based on our leverage ratio and ranges from 0.50% to 1.75% for base rate loans and from 1.50% to 2.75% for Eurodollar rate loans. The agreement governing the Senior Credit Facility is subject to certain customary limitations, including among others: limitation on liens; limitation on mergers, consolidations and sales of assets; limitation on debt; limitation on dividends, stock redemptions and the redemption and/or prepayment of other debt; limitation on investments (including loans and advances) and acquisitions; limitation on transactions with affiliates; and limitation on annual capital expenditures. The terms of the Senior Credit Facility require us to comply with certain financial covenants which include a funded debt to EBITDA ratio (as defined in the Senior Credit Facility, with adjusted EBITDA generally calculated as earnings before, among other adjustments, interest, taxes, depreciation and amortization) not to exceed 3 to 1 as of the end of each fiscal quarter, and an interest coverage ratio of not less than 3.5 to 1 as of the end of each fiscal quarter. The Senior Credit Facility is secured by substantially all present and future assets and properties of the Company. As of June 30, 2011, we had $37.0 million available under the Senior Credit Facility. Our ability to borrow under the Senior Credit Facility fluctuates from time to time due to, among other factors, our borrowings under the facility and our funded debt to adjusted EBITDA ratio. At June 30, 2011, we had $42.0 million outstanding under the Senior Credit Facility which was borrowed in connection with the acquisition of DHI. At June 30, 2011, we were in compliance with all covenants.
     Our cash requirements fluctuate as a result of numerous factors, such as the extent to which we generate cash from operations, progress in research and development projects, competition and technological developments and the time and expenditures required to obtain governmental approval of our products. In addition, we intend to continue to evaluate candidates for acquisitions or technology licensing. If we determine to proceed with any such transactions, we may need to incur additional debt, or issue additional equity, to successfully complete the transactions. Based on our current cash position and our current assessment of future operating results, we believe that our existing sources of liquidity will be adequate to meet our operating needs during the next 12 months.
Off-Balance Sheet Arrangements
     At June 30, 2011, we did not have any relationships or other arrangements with unconsolidated entities or financial partners, such as entities often referred to as structured finance or special purpose entities, which would have been established for the purpose of facilitating off-balance sheet arrangements or other contractually narrow or limited purposes. As such, we are not materially exposed to any financing, liquidity, market or credit risk that could arise if we had engaged in such relationships.
Critical Accounting Policies and Estimates
     Our discussion and analysis of our financial condition and results of operations are based on our consolidated financial statements, which have been prepared in accordance with accounting principles generally accepted in the U.S. The preparation of these financial statements requires us to make estimates and judgments that affect the reported amounts of assets, liabilities, revenues and expenses, and related disclosure of contingent assets and liabilities. On an on-going basis, we evaluate our estimates, including those related to customer programs and incentives, bad debts, inventories, intangible assets, income taxes, stock-based compensation, restructuring and contingencies and litigation. We base our estimates on historical experience and on various other assumptions that we believe are reasonable under the circumstances, the results of which

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form the basis for making judgments about the carrying values of assets and liabilities that are not readily apparent from other sources. Actual results may differ from these estimates.
     There have been no significant changes in critical accounting policies or management estimates since the year ended December 31, 2010. A comprehensive discussion of our critical accounting policies and management estimates is included in Management’s Discussion and Analysis of Financial Condition and Results of Operations in our Annual Report on Form 10-K for the year ended December 31, 2010.
ITEM 3. Quantitative and Qualitative Disclosures About Market Risk
     Interest Rate Risk
     The fair market value of our floating interest rate debt is subject to interest rate risk. Generally, the fair market value of floating interest rate debt will vary as interest rates increase or decrease. We had $42.0 million outstanding under our Senior Credit Facility at June 30, 2011. The weighted average interest rate on these borrowings is currently 2.5%. A hypothetical 100 basis point adverse move in interest rates along the entire interest rate yield curve would increase our annual interest expense by approximately $0.4 million. Based on our market risk sensitive instruments outstanding at June 30, 2011, we have determined that there was no material market risk exposure from such instruments to our consolidated financial position, results of operations or cash flows as of such date.
     Our current investment policy with respect to our cash and cash equivalents focuses on maintaining acceptable levels of interest rate risk and liquidity. Although we continually evaluate our placement of investments, as of June 30, 2011, our cash and cash equivalents were placed in money market or overnight funds that we believe are highly liquid and not subject to material market fluctuation risk.
     Foreign Currency Exchange Risk
     The majority of our international sales are negotiated for and paid in U.S. dollars. Nonetheless, these sales are subject to currency risks, since changes in the values of foreign currencies relative to the value of the U.S. dollar can render our products comparatively more expensive. These exchange rate fluctuations could negatively impact international sales of our products, as could changes in the general economic conditions in those markets. Continued change in the values of the Euro, the Japanese Yen and other foreign currencies could have a negative impact on our business, financial condition and results of operations. We do not currently hedge against exchange rate fluctuations, which means that we are fully exposed to exchange rate changes.
ITEM 4. Controls and Procedures
     Evaluation of disclosure controls and procedures: We have performed an evaluation under the supervision and with the participation of our management, including our Chief Executive Officer (“CEO”) and Chief Financial Officer (“CFO”), of the effectiveness of our disclosure controls and procedures, as defined in Rule 13a-15(e) under the Securities Exchange Act of 1934 (the “Exchange Act”). Based on that evaluation, our CEO and CFO concluded that our disclosure controls and procedures were effective as of June 30, 2011 to provide reasonable assurance that information required to be disclosed by us in the reports filed or submitted by us under the Exchange Act is recorded, processed, summarized and reported within the time periods specified in the SEC’s rules and forms.
     Changes in internal control over financial reporting: There was no change in our internal control over financial reporting during the quarter ended June 30, 2011 that materially affected, or is reasonably likely to materially affect, our internal control over financial reporting.

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PART II OTHER INFORMATION
ITEM 1. Legal Proceedings
     None.
ITEM 1A. Risk Factors
     There has been no material change in our risk factors as previously disclosed in our Annual Report on Form 10-K for the fiscal year ended December 31, 2010. For a detailed description of our risk factors, refer to Item 1A, “Risk Factors” of our Annual Report on Form 10-K for the year ended December 31, 2010.
ITEM 2. Unregistered Sales of Equity Securities and Use of Proceeds
     The table below sets forth information regarding repurchases of our common stock by us during the three months ended June 30, 2011:
                                 
                            Approximate dollar  
                    Total number     value of shares that  
                    of shares purchased     may yet be  
    Total number     Average     as part of publicly     purchased  
    of shares     price paid     announced plans     under the plans or  
Period   purchased (1)     per share     or programs     programs (2)  
April
        $           $ 10,300,000  
May
                      10,300,000  
June
    20,992       15.45             10,300,000  
 
                       
Total
    20,992     $ 15.45           $ 10,300,000  
 
                       
 
(1)   We repurchased 20,992 shares of common stock in connection with payment of minimum tax withholding obligations relating to the lapse of restrictions on certain restricted stock awards during the three months ended June 30, 2011.
 
(2)   In June 2005, we announced that our Board of Directors authorized us to repurchase up to $25.0 million in shares of our common stock under our stock repurchase program. In March 2007, we announced that our Board of Directors authorized us to repurchase up to an additional $25.0 million in shares of our common stock under our stock repurchase program. In December 2008, we announced that our Board of Directors authorized us to repurchase up to an additional $25.0 million in shares of our common stock under our stock repurchase program. In December 2009, we announced that our Board of Directors authorized us to repurchase up to an additional $25.0 million in shares of our common stock under our stock repurchase program. Any shares of common stock repurchased under this program will no longer be deemed outstanding upon repurchase and will be returned to the pool of authorized shares. This repurchase program will expire on December 2, 2011 unless extended by our Board of Directors.
ITEM 3. Defaults Upon Senior Securities
     None.
ITEM 5. Other Information
     None.
ITEM 6. Exhibits

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Exhibit    
Number    
3.1
  Restated Certificate of Incorporation of Quidel Corporation. (Incorporated by reference to Exhibit 3.1 to the Registrant’s Quarterly Report on Form 10-Q filed on October 29, 2010.)
 
   
3.2
  Amended and Restated Bylaws of Quidel Corporation. (Incorporated by reference to Exhibit 3.2 to the Registrant’s Current Report on Form 8-K filed on November 8, 2000.)
 
   
4.1
  Certificate of Designations of Series C Junior Participating Preferred Stock. (Incorporated by reference to Exhibit 4.1 to the Registrant’s Quarterly Report on Form 10-Q filed on October 29, 2010.)
 
   
4.2
  Amended and Restated Rights Agreement dated as of December 29, 2006 between Registrant and American Stock Transfer and Trust Company, as Rights Agent. (Incorporated by reference to Exhibit 4.1 to the Registrant’s Current Report on Form 8-K filed on January 5, 2007.)
 
   
10.1*(1)
  Employment Offer Letter, dated May 9, 2011, between Quidel Corporation and Mark W. Smits.
 
   
10.2*(1)
  Agreement Re: Change in Control, entered into on May 11, 2011, between Quidel Corporation and Mark W. Smits.
 
   
31.1*
  Certification by Principal Executive Officer of Registrant pursuant to Rules 13a-14 and 15d-14, as adopted pursuant to Section 302 of the Sarbanes-Oxley Act of 2002.
 
   
31.2*
  Certification by Principal Financial and Accounting Officer of Registrant pursuant to Rules 13a-14 and 15d-14, as adopted pursuant to Section 302 of the Sarbanes-Oxley Act of 2002.
 
   
32.1*
  Certifications by Principal Executive Officer and Principal Financial and Accounting Officer of Registrant pursuant to 18 U.S.C. Section 1350, as adopted pursuant to Section 906 of the Sarbanes-Oxley Act of 2002.
 
   
101**
  XBRL Instance Document
 
   
101**
  XBRL Taxonomy Extension Schema Document
 
   
101**
  XBRL Taxonomy Calculation Linkbase Document
 
   
101**
  XBRL Taxonomy Label Linkbase Document
 
   
101**
  XBRL Taxonomy Presentation Linkbase Document
 
*   Filed herewith.
 
**   Pursuant to applicable securities laws and regulations, we are deemed to have complied with the reporting obligation relating to the submission of interactive data files in such exhibits and are not subject to liability under any anti-fraud provisions of the federal securities laws as long as we have made a good faith attempt to comply with the submission requirements and promptly amend the interactive data files after becoming aware that the interactive data files fail to comply with the submission requirements. Users of this data are advised that, pursuant to Rule 406T, these interactive data files are deemed not filed and otherwise are not subject to liability.
 
(1)   Indicates a management plan or compensatory plan or arrangement.

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Table of Contents

SIGNATURES
     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.
         
Date: August 3, 2011   QUIDEL CORPORATION
 
 
  /s/ DOUGLAS C. BRYANT    
  Douglas C. Bryant   
  President and Chief Executive Officer
(Principal Executive Officer)
 
 
 
     
  /s/ JOHN M. RADAK    
  John M. Radak   
  Chief Financial Officer
(Principal Financial Officer and Accounting Officer)
 
 
 

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Table of Contents

Exhibit Index
     
Exhibit    
Number    
3.1
  Restated Certificate of Incorporation of Quidel Corporation. (Incorporated by reference to Exhibit 3.1 to the Registrant’s Quarterly Report on Form 10-Q filed on October 29, 2010.)
 
   
3.2
  Amended and Restated Bylaws of Quidel Corporation. (Incorporated by reference to Exhibit 3.2 to the Registrant’s Current Report on Form 8-K filed on November 8, 2000.)
 
   
4.1
  Certificate of Designations of Series C Junior Participating Preferred Stock. (Incorporated by reference to Exhibit 4.1 to the Registrant’s Quarterly Report on Form 10-Q filed on October 29, 2010.)
 
   
4.2
  Amended and Restated Rights Agreement dated as of December 29, 2006 between Registrant and American Stock Transfer and Trust Company, as Rights Agent. (Incorporated by reference to Exhibit 4.1 to the Registrant’s Current Report on Form 8-K filed on January 5, 2007.)
 
   
10.1*(1)
  Employment Offer Letter, dated May 9, 2011, between Quidel Corporation and Mark W. Smits.
 
   
10.2*(1)
  Agreement Re: Change in Control, entered into on May 11, 2011, between Quidel Corporation and Mark W. Smits.
 
   
31.1*
  Certification by Principal Executive Officer of Registrant pursuant to Rules 13a-14 and 15d-14, as adopted pursuant to Section 302 of the Sarbanes-Oxley Act of 2002.
 
   
31.2*
  Certification by Principal Financial and Accounting Officer of Registrant pursuant to Rules 13a-14 and 15d-14, as adopted pursuant to Section 302 of the Sarbanes-Oxley Act of 2002.
 
   
32.1*
  Certifications by Principal Executive Officer and Principal Financial and Accounting Officer of Registrant pursuant to 18 U.S.C. Section 1350, as adopted pursuant to Section 906 of the Sarbanes-Oxley Act of 2002.
 
   
101**
  XBRL Instance Document
 
   
101**
  XBRL Taxonomy Extension Schema Document
 
   
101**
  XBRL Taxonomy Calculation Linkbase Document
 
   
101**
  XBRL Taxonomy Label Linkbase Document
 
   
101**
  XBRL Taxonomy Presentation Linkbase Document
 
*   Filed herewith.
 
**   Pursuant to applicable securities laws and regulations, we are deemed to have complied with the reporting obligation relating to the submission of interactive data files in such exhibits and are not subject to liability under any anti-fraud provisions of the federal securities laws as long as we have made a good faith attempt to comply with the submission requirements and promptly amend the interactive data files after becoming aware that the interactive data files fail to comply with the submission requirements. Users of this data are advised that, pursuant to Rule 406T, these interactive data files are deemed not filed and otherwise are not subject to liability.
 
(1)   Indicates a management plan or compensatory plan or arrangement.

21