ASTRONICS CORP

UNITED STATES

SECURITIES AND EXCHANGE COMMISSION

Washington, D.C. 20549

Form 10-K

Commission File Number 0-7087

Astronics Corporation

(Exact Name of Registrant as Specified in its Charter)

130 Commerce Way, East Aurora, NY 14052

(Address of principal executive office)

Registrant’s telephone number, including area code (716)805-1599

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

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

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

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

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 ☒ No☐

Indicate by check mark whether the registrant has submitted electronically every Interactive Data File required to be submitted pursuant to Rule 405 of Regulation S-T (§232.405 of this chapter) during the preceding 12 months (or for such shorter period that the registrant was required to submit such files). Yes ☒ No☐

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

If an emerging growth company, indicate by check mark if the registrant has elected not to use the extended transition

period for complying with any new or revised financial accounting standards provided pursuant to Section 13(a) of the Exchange Act.☐

Indicate by check mark whether the registrant has filed a report on and attestation to its management’s assessment of the effectiveness of its internal control over financial reporting under Section 404(b) of the Sarbanes-Oxley Act (15 U.S.C. 7262(b)) by the registered public accounting firm that prepared or issued its audit report.☒

If securities are registered pursuant to Section 12(b) of the Act, indicate by check mark whether the financial statements of the registrant included in the filing reflect the correction of an error to previously issued financial statements.☐

Indicate by check mark whether any of those error corrections are restatements that required a recovery analysis of incentive-based compensation received by any of the registrant’s executive officers during the relevant recovery period pursuant to §240.10D-1(b).☐

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

As of February 19, 2026, 35,691,175 shares were outstanding, consisting of 31,868,534 shares of Common Stock, $0.01 par value, and 3,822,641 shares of Class B Stock, $0.01 par value. The aggregate market value as of June 28, 2025, the last business day of the Company’s most recently completed second fiscal quarter, of the shares of Common Stock and Class B Stock of Astronics Corporation held by non-affiliates was approximately $1,082,000,000 (assuming conversion of all of the outstanding Class B Stock into Common Stock and assuming the affiliates of the Registrant to be its directors, executive officers and persons known to the Registrant to beneficially own more than 10% of the outstanding capital stock of the Registrant).

DOCUMENTS INCORPORATED BY REFERENCE

Portions of the Company’s definitive proxy statement relating to the 2026 Annual Meeting of Shareholders to be held on May 28, 2026 (the “2026 Proxy Statement”), are incorporated by reference into Part III of this Annual Report on Form 10-K (this “Report”). The 2026 Proxy Statement will be filed with the U.S. Securities and Exchange Commission within 120 days after the end of the fiscal year to which this Report relates.

Table of Contents

Index to Annual Report

on Form 10-K

Year Ended December 31, 2025

FORWARD LOOKING STATEMENTS

Information included or incorporated by reference in this report that does not consist of historical facts, including statements accompanied by or containing words such as “may,” “will,” “should,” “believes,” “expects,” “expected,” “intends,” “plans,” “projects,” “approximate,” “estimates,” “predicts,” “potential,” “outlook,” “forecast,” “anticipates,” “presume,” “assume” and other words and terms of similar meaning, including their negative counterparts, are forward-looking statements within the meaning of Section 27A of the Securities Act of 1933, as amended (the “Securities Act”), and Section 21E of the Securities Exchange Act of 1934, as amended (the “Exchange Act”). Such forward-looking statements are made pursuant to the safe harbor provisions of the Private Securities Litigation Reform Act of 1995. Forward-looking statements are subject to several factors, risks and uncertainties that may cause actual results to differ materially from those that we expected, including but not limited to:

•the loss of Boeing as a major customer or a significant reduction in business with Boeing;

•the cyclical nature of the markets we serve and their sensitivity to foreign economic conditions, conflicts and events;

•the highly competitive nature of our industry;

•our dependence on government contracts and subcontracts with defense prime contractors and subcontractors, and the possibility that these contracts may be terminated, not fully funded or awarded to our competitors;

•the highly-regulated nature of our industry and the potential for fines, penalties, debarment or Federal Aviation Administration (“FAA”) decertification in the event of noncompliance;

•our ability to adapt to technological change;

•our ability to successfully develop new products;

•the incurring of loss and liabilities as a result of our acquisition strategy;

•our ability to protect our information technology infrastructure from cyber-attacks;

•our ability to adequately enforce and protect our intellectual property and defend against assertions of infringement;

•our ability to successfully procure critical components and raw materials used to manufacture our products and to manage our supply chains;

•our ability to manage the escalating costs of labor and employees benefits;

•our ability to manage price inflation for labor and materials;

•the possibility that our subcontractors will fail to perform their contractual obligations;

•our ability to avoid late delivery penalties;

•our ability to avoid increased or unexpected costs relating to our fixed-price contracts;

•our ability to avoid product failures or recalls, the costs of which may exceed our insurance coverage;

•risks relating to our manufacturing facilities, including natural disasters, war, terrorism, strikes or work stoppages;

•our ability to comply with applicable laws and with new or more stringent governmental regulations;

•our ability to successfully manage our indebtedness, including restrictive financial covenants under our Revolving Credit Facility (as defined below) and the risks related to our outstanding 2030 Convertible Notes and 2031 Convertible Notes (as defined below);

•our ability to successfully manage risks presented by fluctuating interest rates and foreign currency exposure;

•our ability to favorably resolve legal proceedings brought against us, including the ongoing Lufthansa Technik AG patent infringement claim;

•our ability to maintain compliance with U.S. export regulations and the uncertainty with respect to U.S. trade policies, treaties, tariffs, and taxes;

•our ability to achieve our sustainability objectives;

•our ability to maintain our security clearance with the U.S. Department of Defense;

•our ability to hire, develop, and retain our management team and key personnel; and

•the volatility of our stock price.

While we believe that the forward-looking statements in this report are reasonable, these statements are not guarantees of future performance and are subject to several factors, risks and uncertainties, the impact or occurrence of which could cause actual results to differ materially from the expected results described in the forward-looking statements. Certain of these factors, risks and uncertainties are discussed in this report in Item 1A, Risk Factors, and Item 7, Management’s Discussion and Analysis of Financial Condition and Results of Operations. All written and oral forward-looking statements attributable to us, or persons acting on our behalf, are expressly qualified in their entirety by the cautionary statements as well as other cautionary statements that are made from time to time in our other filings with the U.S. Securities and Exchange Commission and public communications. You should evaluate all forward-looking statements made in this report in the context of these risks and uncertainties.

The important factors discussed above may not contain all of the factors that are important to you. In addition, new factors, risks and uncertainties may emerge from time to time that may affect the forward-looking statements made herein. Given these factors, risks and uncertainties, investors should not place undue reliance on forward-looking statements as predictive of future results. The forward-looking statements included in this report are made only as of the date hereof and are based on our current expectations. Except as required by applicable law, we disclaim any obligation to update or revise the forward-looking statements made in this report as a result of new information, future events or otherwise.