Sec Form 4 Filing - PEABODY MARK @ ASTRONICS CORP - 2026-06-15

FORM 4 Check this box if no longer subject to Section 16. Form 4 or Form 5 obligations may continue. See Instruction 1(b).

UNITED STATES SECURITIES AND EXCHANGE COMMISSION Washington, D.C. 20549 STATEMENT OF CHANGES IN BENEFICIAL OWNERSHIP Filed pursuant to Section 16(a) of the Securities Exchange Act of 1934, Section 17(a) of the Public Utility Holding Company Act of 1935 or Section 30(h) of the Investment Company Act of 1940

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1. Name and Address of Reporting Person PEABODY MARK 2. Issuer Name and Ticker or Trading Symbol ASTRONICS CORP [ ATRO] 5. Relationship of Reporting Person(s) to Issuer (Check all applicable) _____ Director _____ 10% Owner X __ Officer (give title below) _____ Other (specify below) Executive VP & Pres-Aerospace (Last) (First) (Middle) 130 COMMERCE WAY 3. Date of Earliest Transaction (MM/DD/YY) 06/15/2026 (Street) EAST AURORA, NY14052 4. If Amendment, Date Original Filed (MM/DD/YY) 6. Individual or Joint/Group Filing (Check Applicable Line) __ X __ Form filed by One Reporting Person _____ Form filed by More than One Reporting Person (City) (State) (Zip)

Table I - Non-Derivative Securities Acquired, Disposed of, or Beneficially Owned 1.Title of Security (Instr. 3) 2. Transaction Date (MM/DD/YY) 2A. Deemed Execution Date, if any (MM/DD/YY) 3. Transaction Code (Instr. 8) 4. Securities Acquired (A) or Disposed of (D) (Instr. 3, 4 and 5) 5. Amount of Securities Beneficially Owned Following Reported Transaction(s) (Instr. 3 and 4) 6. Ownership Form: Direct (D) or Indirect (I) (Instr. 4) 7. Nature of Indirect Beneficial Ownership (Instr. 4) Code V Amount (A) or (D) Price $.01 PV Com Stk 62,382.73 D $.01 PV CL B STK 06/15/2026 J( 1 ) 49,165 A $ 0 232,610 D

Table II - Derivative Securities Acquired, Disposed of, or Beneficially Owned ( e.g. , puts, calls, warrants, options, convertible securities) 1. Title of Derivative Security (Instr. 3) 2. Conversion or Exercise Price of Derivative Security 3. Transaction Date (MM/DD/YY) 3A. Deemed Execution Date, if any (MM/DD/YY) 4. Transaction Code (Instr. 8) 5. Number of Derivative Securities Acquired (A) or Disposed of (D) (Instr. 3, 4, and 5) 6. Date Exercisable and Expiration Date (MM/DD/YY) 7. Title and Amount of Underlying Securities (Instr. 3 and 4) 8. Price of Derivative Security (Instr. 5) 9. Number of Derivative Securities Beneficially Owned Following Reported Transaction(s) (Instr. 4) 10. Ownership Form of Derivative Security: Direct (D) or Indirect (I) (Instr. 4) 11. Nature of Indirect Beneficial Ownership (Instr. 4) Code V (A) (D) Date Exercisable Expiration Date Title Amount or Number of Shares Option $ 26.47 12/14/2017 12/14/2026 $.01 PV Com Stk 4,820 4,820 D Option $ 26.47 06/15/2026 J( 1 ) 1,108 12/14/2017 12/14/2026 $.01 PV CL B STK 1,108 $ 0 1,831 D Option $ 29.68 12/12/2018 12/12/2027 $.01 PV Com Stk 7,010 7,010 D Option $ 29.68 06/15/2026 J( 1 ) 1,612 12/12/2018 12/12/2027 $.01 PV CL B STK 1,612 $ 0 2,664 D Option $ 26.31 12/13/2019 12/13/2028 $.01 PV Com Stk 9,280 9,280 D Option $ 26.31 06/15/2026 J( 1 ) 1,856 12/13/2019 12/13/2028 $.01 PV CL B STK 1,856 $ 0 1,856 D Option $ 25.03 12/09/2020 12/09/2029 $.01 PV Com Stk 13,600 13,600 D Option $ 25.03 06/15/2026 J( 1 ) 2,720 12/09/2020 12/09/2029 $.01 PV CL B STK 2,720 $ 0 2,720 D Option $ 12.04 01/22/2022 01/22/2031 $.01 PV Com Stk 20,250 20,250 D Option $ 12.04 06/15/2026 J( 1 ) 4,050 01/22/2022 01/21/2031 $.01 PV CL B STK 4,050 $ 0 4,050 D Option $ 9.28 12/09/2022 12/09/2031 $.01 PV Com Stk 24,500 24,500 D Option $ 9.28 06/15/2026 J( 1 ) 4,900 12/09/2022 12/09/2031 $.01 PV CL B STK 4,900 $ 0 4,900 D Option $ 8.12 12/16/2023 12/16/2032 $.01 PV Com Stk 26,700 26,700 D Option $ 8.12 06/15/2026 J( 1 ) 5,340 12/16/2023 12/16/2032 $.01 PV CL B STK 5,340 $ 0 5,340 D Restricted Stock Unit ( 2 ) ( 3 ) ( 3 ) $.01 PV Com Stk 15,900 15,900 D Restricted Stock Unit ( 4 ) 06/15/2026 J( 1 ) 3,180 ( 3 ) ( 3 ) $.01 PV CL B STK 3,180 $ 0 3,180 D Option $ 12.63 12/07/2024 12/07/2033 $.01 PV Com Stk 8,300 8,300 D Option $ 12.63 06/15/2026 J( 1 ) 1,660 12/07/2024 12/07/2033 $.01 PV CL B STK 1,660 $ 0 1,660 D Restricted Stock Unit ( 2 ) ( 5 ) ( 5 ) $.01 PV Com Stk 15,150 15,150 D Restricted Stock Unit ( 4 ) 06/15/2026 J( 1 ) 3,030 ( 5 ) ( 5 ) $.01 PV CL B STK 3,030 $ 0 3,030 D Restricted Stock Unit ( 2 ) ( 6 ) ( 6 ) $.01 PV Com Stk 7,675 7,675 D Restricted Stock Unit ( 4 ) 06/15/2026 J( 1 ) 1,535 ( 6 ) ( 6 ) $.01 PV CL B STK 1,535 $ 0 1,535 D

Reporting Owners Reporting Owner Name / Address Relationships Director 10% Owner Officer Other PEABODY MARK 130 COMMERCE WAY EAST AURORA, NY14052 Executive VP & Pres-Aerospace Signatures /s/Julie Davis, as Power of Attorney for Mark Peabody 06/17/2026 Signature of Reporting Person Date

Explanation of Responses:

( 1 )Shares issued pursuant to a one-for-five distribution of Class B stock to holders of both Common and Class B stock on the record date of June 15, 2026. ( 2 )Each restricted stock unit represents the right to receive, at settlement, one share of common stock. ( 3 )Vesting of these restricted stock units depends on Astronics Corp.'s average annual adjusted EBITDA for the period January 1, 2024- December 31, 2026. The "target" number of restricted stock units is reported. Between 50% and 150% of the target number of units may vest on February 22, 2027, with the vesting percentage determined based on actual performance. ( 4 )Each restricted stock unit represents the right to receive, at settlement, one share of class B stock. ( 5 )Vesting of these restricted stock units depends on Astronics Corp.'s average annual adjusted EBITDA for the period January 1, 2025- December 31, 2027. The "target" number of restricted stock units is reported. Between 50% and 150% of the target number of units may vest on February 27, 2028, with the vesting percentage determined based on actual performance. ( 6 )Vesting of these restricted stock units depends on Astronics Corp.'s average annual adjusted EBITDA for the period January 1, 2026- December 31, 2028. The "target" number of restricted stock units is reported. Between 50% and 150% of the target number of units may vest on February 19, 2029, with the vesting percentage determined based on actual performance.

Reminder: Report on a separate line for each class of securities beneficially owned directly or indirectly.

* If the form is filed by more than one reporting person, see Instruction 4(b)(v).

** Intentional misstatements or omissions of facts constitute Federal Criminal Violations. See 18 U.S.C. 1001 and 15 U.S.C. 78ff(a).

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