Results of Operations · Reg FD Disclosure

UNITED STATES SECURITIES AND EXCHANGE COMMISSION Washington, D.C. 20549 FORM 8-K CURRENT REPORT Pursuant to Section 13 or 15(d) of the Securities Exchange Act of 1934 Date of Report (Date of earliest event reported): March 4, 2025 ASTRONICS CORPORATION (Exact name of registrant as specified in its charter) New York   0-7087 16-0959303 (State of Other Jurisdiction of Incorporation) (Commission File Number) (I.R.S. Employer Identification No.) 130 Commerce Way East Aurora , New York 14052 (Address of principal executive offices) (Zip Code) Registrant's telephone number, including area code: ( 716 ) 805-1599 Check the appropriate box below if the Form 8-K filing is intended to simultaneously satisfy the filing obligation of the registrant under any of the following provisions: ☐ Written communications pursuant to Rule 425 under the Securities Act (17 CFR 230.425) ☐ Soliciting material pursuant to Rule 14a-12 under the Exchange Act (17 CFR 240.14a-12) ☐ Pre-commencement communications pursuant to Rule 14d-2(b) under the Exchange Act (17 CFR 240.14d-2(b)) ☐ Pre-commencement communications pursuant to Rule 13e-4(c) under the Exchange Act (17 CFR 240.13e-4(c)) Securities registered pursuant to Section 12(b) of the Act: Title of each class Trading Symbol Name of each exchange on which registered Common Stock, $.01 par value per share ATRO The Nasdaq Stock Market LLC Securities registered pursuant to Section 12(g) of the Act: None Indicate by check mark whether the registrant is an emerging growth company as defined in Rule 405 of the Securities Act of 1933 (§230.405 of this chapter) or Rule 12b-2 of the Securities Exchange Act of 1934 (§240.12b-2 of this chapter). ☐ Emerging growth company 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. ☐ Item 2.02 Results of Operations and Financial Condition. On March 4, 2025 , Astronics Corporation issued a news release announcing its fourth quarter and full year financial results for 2024. A copy of the news release is attached as Exhibit 99.1. Item 7.01 Regulation FD Disclosure On March 4, 2025 , the Company will post on its website at www.investors.astronics.com supplemental prior period tables, furnished as Exhibit 99.2. The information contained herein and in the accompanying exhibits shall not be incorporated by reference into any filing of the registrant, whether made before or after the date hereof, regardless of any general incorporation language in such filing. The information in this report including the exhibits hereto, shall not be deemed to be “filed” for purpose of Section 18 of the Securities Exchange Act of 1934, as amended, or otherwise subject to the liabilities of that section or Sections 11 and 12(a)(2) of the Securities Act of 1933, as amended. Item 9.01 Financial Statements and Exhibits. Exhibit Description 99.1 News Release of Astronics Corporation dated March 4, 2025 99.2 Supplemental Prior Period Tables 104 Cover Page Interactive Data File (embedded within the Inline XBRL document) SIGNATURE Pursuant to the requirements of the Securities Exchange Act of 1934, the registrant has duly caused this report to be signed on its behalf by the undersigned hereunto duly authorized. Astronics Corporation Dated: March 4, 2025 By: /s/ Nancy L. Hedges Name: Nancy L. Hedges Vice President and Chief Financial Officer