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UNITED STATES

SECURITIES AND EXCHANGE COMMISSION

Washington, D.C. 20549

Form 10-Q

For the quarterly period ended September 29, 2012

or

For the transition period from         to         

Commission File Number 0-7087

ASTRONICS CORPORATION

(Exact name of registrant as specified in its charter)

(716) 805-1599

(Registrant’s telephone number, including area code)

NOT APPLICABLE

(Former name, former address and former fiscal year, if changed since last report)

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

$.01 par value Common Stock, $.01 par value Class B Stock

(Title of Class)

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, and (2) has been subject to such filing requirements for the past 90 days.    Yes  x    No  ¨

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

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

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

As of September 29, 2012, 12,425,869 shares of common stock were outstanding consisting of 9,937,742 shares of common stock ($.01 par value) and 2,488,127 shares of Class B common stock ($.01 par value).

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Part 1 – Financial Information

Item 1. Financial Statements

ASTRONICS CORPORATION

Consolidated Condensed Balance Sheets

September 29, 2012 with Comparative Figures for December 31, 2011

(In thousands)

See notes to consolidated condensed financial statements

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ASTRONICS CORPORATION

Consolidated Condensed Statements of Operations

Three and Nine Months Ended September 29, 2012 With Comparative Figures for 2011

(Unaudited)

(In thousands, except per share data)

See notes to consolidated condensed financial statements.

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ASTRONICS CORPORATION

Consolidated Condensed Statements of Comprehensive Income

Three and Nine Months ended September 29, 2012 With Comparative Figures for 2011

(Unaudited)

(In thousands)

See notes to consolidated condensed financial statements.

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ASTRONICS CORPORATION

Consolidated Condensed Statements of Cash Flows

Nine Months ended September 29, 2012

With Comparative Figures for 2011

(Unaudited)

(In thousands)

See notes to consolidated condensed financial statements.

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ASTRONICS CORPORATION

Notes to Consolidated Condensed Financial Statements

September 29, 2012

(Unaudited)

1) Basis of Presentation

The accompanying unaudited statements have been prepared in accordance with U.S. generally accepted accounting principles for interim financial information. Accordingly, they do not include all of the information and footnotes required by U.S. generally accepted accounting principles for complete financial statements. In the opinion of management, all adjustments, consisting of normal recurring accruals, considered necessary for a fair presentation have been included.

Operating Results

The results of operations for any interim period are not necessarily indicative of results for the full year. Operating results for the three and nine month periods ended September 29, 2012 are not necessarily indicative of the results that may be expected for the year ending December 31, 2012.

The balance sheet at December 31, 2011 has been derived from the audited financial statements at that date, but does not include all of the information and footnotes required by U.S. generally accepted accounting principles for complete financial statements.

For further information, refer to the financial statements and footnotes thereto included in Astronics Corporation’s 2011 annual report on Form 10-K.

Description of the Business

Astronics is a leading supplier of advanced, high-performance lighting systems, electrical power generation and distribution systems, avionics databus solutions, enhanced vision systems and aircraft safety systems for the global aerospace industry as well as test, training and simulation systems primarily for the military. We sell our products to airframe manufacturers (OEMs) in the commercial transport, business jet and military markets as well as FAA/Airport, OEM suppliers and aircraft operators around the world. The Company provides its products through its wholly owned subsidiaries Luminescent Systems, Inc. (“LSI”), Luminescent Systems Canada, Inc. (“LSI Canada”), DME Corporation (“DME”), Ballard Technology, Inc. (“Ballard”), Max-Viz Inc. (“Max-Viz”) and Astronics Advanced Electronic Systems Corp. (“AES”). On November 30, 2011, Astronics acquired 100% of the stock of Ballard. Ballard designs and produces avionics databus solutions for defense and commercial aerospace applications. On July 30, 2012 Astronics acquired by merger, 100% of the stock of Max-Viz, Inc. Max-Viz is a manufacturer of industry-leading enhanced vision systems for defense and commercial aerospace applications for the purpose of improving situational awareness. Both Ballard and Max-Viz are part of our Aerospace segment.

The Company has two reportable segments, Aerospace and Test Systems. The Aerospace segment designs and manufactures products for the global aerospace industry. The Test Systems segment designs, manufactures and maintains communications and weapons test systems and training and simulation devices for military applications.

Principles of Consolidation

The consolidated financial statements include the accounts of the Company and its wholly owned subsidiaries. All intercompany transactions and balances have been eliminated. Acquisitions are accounted for under the purchase method and, accordingly, the operating results for the acquired companies are included in the consolidated statements of earnings from the respective dates of acquisition.

Revenue and Expense Recognition

In the Aerospace segment, revenue is recognized on the accrual basis at the time of shipment of goods and transfer of title. There are no significant contracts allowing for right of return.

In the Test Systems segment, revenue of approximately 32% and 58% for the three months ending September 29, 2012 and October 1, 2011 respectively and approximately 37% and 76% for the nine months ending September 29, 2012 and October 1, 2011 respectively, is recognized from long-term, fixed-price contracts using the percentage-of-completion method of accounting, measured by multiplying the estimated total contract value by the ratio of actual contract costs incurred to date to the estimated total contract costs. Substantially all long-term contracts are with U.S. government agencies and contractors thereto. The Company makes significant estimates involving its usage of percentage-of-completion accounting to recognize contract revenues. The Company periodically reviews contracts in process for estimates-to-completion, and revises estimated gross profit accordingly. While the

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Company believes its estimated gross profit on contracts in process is reasonable, unforeseen events and changes in circumstances can take place in a subsequent accounting period that may cause the Company to revise its estimated gross profit on one or more of its contracts in process. Accordingly, the ultimate gross profit realized upon completion of such contracts can vary significantly from estimated amounts between accounting periods. Revenue not recognized using the percentage-of-completion method is recognized at the time of shipment of goods and transfer of title.

Cost of Products Sold, Engineering and Development and Selling, General and Administrative Expenses

Cost of products sold includes the costs to manufacture products such as direct materials and labor and manufacturing overhead as well as all engineering and developmental costs. The Company is engaged in a variety of engineering and design activities as well as basic research and development activities directed to the substantial improvement or new application of the Company’s existing technologies. These costs are expensed when incurred and included in cost of sales. Research and development, design and related engineering amounted to $12.8 million and $9.5 million for the three months ended September 29, 2012 and October 1, 2011 respectively and $33.9 million and $26.6 million for the nine months ended September 29, 2012 and October 1, 2011, respectively. Selling, general and administrative expenses include costs primarily related to our sales and marketing departments and administrative departments. Interest expense is shown net of interest income. Interest income was insignificant for each of the three and nine months ended for both September 29, 2012 and October 1, 2011.

Financial Instruments

The Company’s financial instruments consist primarily of cash and cash equivalents, accounts receivable, accounts payable, notes payable, long-term debt and interest rate swaps. The Company performs periodic credit evaluations of its customers’ financial condition and generally does not require collateral and the Company does not hold or issue financial instruments for trading purposes. Due to their short-term nature the carrying value of cash and equivalents, accounts receivable, accounts payable, and notes payable, if any, approximate fair value. The carrying value of the Company’s variable rate long-term debt also approximates fair value due to the variable rate feature of these instruments. The Company’s interest rate swaps are recorded at fair value as described under Note 16 - Fair Value and Note 17 - Derivative Financial Instruments.

Derivatives

The accounting for changes in the fair value of derivatives depends on the intended use and resulting designation. The Company’s use of derivative instruments is limited to cash flow hedges for interest rate risk associated with long-term debt. Interest rate swaps are used to adjust the proportion of total debt that is subject to variable and fixed interest rates. The interest rate swaps are designated as hedges of the amount of future cash flows related to interest payments on variable-rate debt that, in combination with the interest payments on the debt, convert a portion of the variable-rate debt to fixed-rate debt. The Company records all derivatives on the balance sheet at fair value as described under Note 16 - Fair Value and Note 17 - Derivative Financial Instruments. The related gains or losses, to the extent the derivatives are effective as a hedge, are deferred in shareholders’ equity as a component of Accumulated Other Comprehensive Income (Loss) (AOCI). Any ineffectiveness is immediately recorded in the statement of operations.

Foreign Currency Translation

The Company accounts for its foreign currency translation in accordance with ASC Topic 830, Foreign Currency Translation. The aggregate transaction gain or loss included in operations was insignificant for the periods ending September 29, 2012 and October 1, 2011.

Loss contingencies

Loss contingencies may from time to time arise from situations such as warranty claims and other legal actions. Loss contingencies are recorded as liabilities when it is probable that a liability has been incurred and the amount of the loss is reasonably estimable. Disclosure is required when there is a reasonable possibility that the ultimate loss will exceed the recorded provision. Contingent liabilities are often resolved over long time periods. In recording liabilities for probable losses, management is required to make estimates and judgments regarding the amount or range of the probable loss. Management continually assesses the adequacy of estimated loss contingencies and, if necessary, adjusts the amounts recorded as better information becomes known.

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Accounting Pronouncements Adopted in 2012

On January 1, 2012, the Company adopted the new provisions of Accounting Standards Update (“ASU”) No. 2011-05, Comprehensive Income (Topic 220). The amendments in this Update require an entity to report all non-owner changes in stockholders’ equity either in a single continuous statement of comprehensive income or in two separate but consecutive statements. The ASU prohibits the presentation of the components of comprehensive income in the statement of stockholder’s equity. The amendments are effective for annual and interim periods beginning after December 15, 2011 and should be applied retrospectively. In December 2011, the Financial Accounting Standards Board issued ASU No. 2011-12, Comprehensive Income (Topic 220): Deferral of the Effective Date for Amendments to the Presentation of Reclassifications of Items Out of Accumulated Other Comprehensive Income in Accounting Standards Update No. 2011-05. The amendments in this Update defer the effective date pertaining only to reclassification adjustments out of accumulated other comprehensive income in Accounting Standards Update 2011-05, Comprehensive Income (Topic 220): Presentation of Comprehensive Income, until the Financial Accounting Standards Board is able to reconsider those presentation requirements. Other than requiring an additional statement and disclosures, the impact on the Company’s financial statements was not significant.

On January 1, 2012, the Company adopted the new provisions of ASU No. 2011-04, “Fair Value Measurement (Topic 820) – Amendments to Achieve Common Fair Value Measurement and Disclosure Requirements in U.S. GAAP and IFRS.” The amendments provide a consistent definition of fair value and ensure that the fair value measurement and disclosure requirements are similar between U.S. GAAP and International Financial Reporting Standards. The amendments also change certain fair value measurement principles and enhance the disclosure requirements, particularly for Level 3 fair value measurements. The amendments are effective during interim and annual periods beginning after December 15, 2011 and should be applied prospectively. Other than requiring additional disclosures, the adoption of this amendment did not have a material impact on the Company’s financial statements.

On January 1, 2012, the Company adopted the new provisions of ASU No. 2011-08, Intangibles - Goodwill and Other (Topic 350). The amendments in this Update will allow an entity to first assess qualitative factors to determine whether it is necessary to perform the two-step quantitative goodwill impairment test. Under these amendments, an entity would not be required to calculate the fair value of a reporting unit unless the entity determines, based on a qualitative assessment, that it is more likely than not that its fair value is less than its carrying amount. The amendments are effective for annual and interim goodwill impairment tests performed for fiscal years beginning after December 15, 2011. The adoption of this pronouncement had no impact on the Company’s financial statements.

2) Inventories

Inventories are stated at the lower of cost or market, cost being determined in accordance with the first-in, first-out method. Inventories are as follows:

The Company records valuation reserves to provide for excess, slow moving or obsolete inventory or to reduce inventory to the lower of cost or market value. In determining the appropriate reserve, the Company considers the age of inventory on hand, the overall inventory levels in relation to forecasted demands as well as reserving for specifically identified inventory that the Company believes is no longer salable.

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3) Property, Plant and Equipment

The following table summarizes Property, Plant and Equipment as follows:

4) Intangible Assets

The following table summarizes acquired intangible assets as follows:

All acquired intangible assets other than goodwill and one trade name are being amortized. Amortization expense for acquired intangibles is summarized as follows:

Amortization expense for intangible assets for 2012 and for each of the next five years is summarized as follows:

5) Goodwill

The following table summarizes the changes in the carrying amount of goodwill for 2012:

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6) Long-term Debt and Notes Payable

The Company extended and modified its existing credit facility by entering into a Second Amended and Restated Credit Agreement (the “Credit Agreement”), dated August 31, 2011. The Company’s Credit Agreement provides for a revolving credit line in the amount of $35 million, less outstanding letters of credit, through August 31, 2016 and a $14 million term loan maturing January 30, 2014, with interest on both loans at a rate of LIBOR plus between 1.50% and 2.50% based on the Company’s Leverage Ratio under the credit agreement. The credit facility allocates up to $20 million of the $35 million revolving credit line for the issuance of letters of credit, including certain existing letters of credit. The credit facility is secured by substantially all of the Company’s assets.

There was $9.0 million outstanding on our credit facility at September 29, 2012 and nothing outstanding at December 31, 2011. The Company had available on its credit facility $15.2 million at September 29, 2012. At September 29, 2012, outstanding letters of credit totaled $10.8 million. In addition, the Company is required to pay a commitment fee quarterly at a rate of between 0.25% and 0.35% per annum on the unused portion of the total revolving credit commitment, also based on the Company’s Leverage Ratio.

Prior to the August 31, 2011 amendment of the credit facility, the Company’s Credit Agreement provided for a revolving credit line of $35 million for working capital requirements which was committed through January 2012, with interest at LIBOR plus between 2.75% and 4.50%. In addition, the Company was required to pay a commitment fee of between 0.30% and 0.50% on the unused portion of the total credit commitment for the preceding quarter, based on the Company’s leverage ratio under the Credit Agreement.

The Company had outstanding a $5.0 million subordinated promissory note with interest fixed at 6.0% that was paid in its entirety on January 13, 2012.

7) Product Warranties

In the ordinary course of business, the Company warrants its products against defects in design, materials and workmanship typically over periods ranging from twelve to sixty months. The Company determines warranty reserves needed by product line based on experience and current facts and circumstances. Activity in the warranty accrual is summarized as follows:

8) Income Taxes

The Company recognizes deferred tax assets and liabilities for the expected future tax consequences of temporary differences between the financial reporting and tax basis of assets and liabilities. Deferred tax assets are reduced, if deemed necessary, by a valuation allowance for the amount of tax benefits which are not expected to be realized. Investment tax credits are recognized on the flow through method.

ASC Topic 740-10 “Overall - Uncertainty in Income Taxes” (“ASC Topic 740-10”) clarifies the accounting and disclosure for uncertainty in tax positions. ASC Topic 740-10 seeks to reduce the diversity in practice associated with certain aspects of the recognition and measurement related to accounting for income taxes. The Company is subject to the provisions of ASC Topic 740-10 and has analyzed filing positions in all of the federal and state jurisdictions where it is required to file income tax returns, as well as all open tax years in these jurisdictions. Should the Company need to accrue a liability for uncertain tax benefits, any interest associated with that liability will be recorded as interest expense. Penalties, if any, would be recognized as operating expenses. There are no penalties or interest liability accrued as of September 29, 2012 or December 31, 2011, nor are any penalties or interest costs included in expense for the three and nine month periods ending September 29, 2012 and October 1, 2011. The years under which we conducted our evaluation coincided with the tax years currently still subject to examination by major federal and state tax jurisdictions, those being 2010 through 2011 for federal purposes and 2008 through 2011 for state purposes.

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The effective tax rate was 32.1% and 24.8% for the nine months and 33.2% and 11.2% for the three months ended September 29, 2012 and October 1, 2011, respectively. The effective tax rate for the three and nine months of 2012 was impacted primarily by the domestic production activity deduction, as well as lower state and foreign taxes. The effective tax rate for the three and nine months of 2011 was impacted primarily by the domestic production activity deduction as well as the impact of domestic R&D tax credits, offset somewhat by higher state and foreign taxes.

9) Shareholders’ Equity

The changes in shareholders’ equity for the nine months ended September 29, 2012 are summarized as follows as adjusted to reflect the impact of the three-for-twenty distribution of Class B Stock discussed in Note 20:

Actual Class B shares outstanding did not exceed the amount authorized at any time, due to the conversion of Class B shares to common stock prior to the stock distribution. However for presentation purposes the number of Class B shares outstanding has been restated to present the distribution as of the beginning of the period.

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10) Earnings Per Share

Basic and diluted weighted-average shares outstanding are as follows:

The above information has been adjusted to reflect the impact of the three-for-twenty distribution of Class B Stock discussed in Note 20.

11) Comprehensive Income and Accumulated Other Comprehensive Income (Loss)

The components of accumulated other comprehensive income (loss) are as follows:

The components of other comprehensive income (loss) are as follows:

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12) Supplemental Retirement Plan and Related Post Retirement Benefits

The Company has two non-qualified supplemental retirement defined benefit plans (“SERP” and “SERP II”) for certain executive officers. The following table sets forth information regarding the net periodic pension cost for the plans.

Participants in the SERP are entitled to paid medical, dental and long-term care insurance benefits upon retirement under the plan. The following table sets forth information regarding the net periodic cost recognized for those benefits:

On March 6, 2012 the Company adopted a second non-qualified supplemental retirement defined benefit plan (“SERP II”) for eligible executive officers. The Company recorded a liability at the date of adoption of $5.8 million for the projected benefit obligation. Pension cost of the new plan for the year ending December 31, 2012 is estimated to be approximately $0.8 million. The plan is unfunded and the Company does not expect to make any contributions to the plan, nor does it expect any benefits will be paid from the plan in 2012.

13) Sales to Major Customers

The Company has a significant concentration of business with two major customers, Panasonic Aviation Corporation and various departments of the U.S. Government, primarily branches of the Department of Defense and the Federal Aviation Administration. The following is information relating to the activity with those customers: