PETER J. GUNDERMANN - 03 Mar 2026 Form 4 Insider Report for ASTRONICS CORP (ATRO)

Role: PRESIDENT/CEO, Director
Signature: /S/JULIE DAVIS, AS POWER OF ATTORNEY FOR PETER J. GUNDERMANN
Issuer symbol: ATRO
Transactions as of: 03 Mar 2026
Net transactions value: $0
Form type: 4
Filing time: 05 Mar 2026, 16:23:18 UTC
Previous filing: 23 Feb 2026
SEC: View on sec.gov

Reporting Owners (1)

Name	Relationship	Address	Signature	Signature date	CIK
GUNDERMANN PETER J	PRESIDENT/CEO, Director	130 COMMERCE WAY, EAST AURORA	/S/JULIE DAVIS, AS POWER OF ATTORNEY FOR PETER J. GUNDERMANN	05 Mar 2026	0001182854

Transactions Table

Type	Sym	Class	Transaction	Value $	Shares	Change %	* Price $	Shares After	Date	Ownership	Footnotes
transaction	ATRO	$.01 PV Com Stk	Options Exercise		+13,550	+16%	$81.35^*	97,457	03 Mar 2026	Direct
transaction	ATRO	$.01 PV Com Stk	Tax liability		-3,489	-3.6%	$81.35^*	93,968	03 Mar 2026	Direct	F1
holding	ATRO	$.01 PV CL B STK						747,911	03 Mar 2026	Direct

Derivative Securities (e.g., puts, calls, warrants, options, convertible securities)

Type	Sym	Class	Transaction	Value $	Shares	Change %	* Price $	Shares After	Date	Underlying Class	Amount	Exercise Price	Ownership	Footnotes
transaction	ATRO	Restricted Stock Unit	Options Exercise		-13,550	-100%	$0.000000^*	0	03 Mar 2026	$.01 PV Com Stk	13,550		Direct	F2, F6
holding	ATRO	Option						14,460	03 Mar 2026	$.01 PV Com Stk	14,460	$31.76	Direct
holding	ATRO	Option						2,169	03 Mar 2026	$.01 PV CL B STK	2,169	$31.76	Direct
holding	ATRO	Option						26,300	03 Mar 2026	$.01 PV Com Stk	26,300	$35.61	Direct
holding	ATRO	Option						3,945	03 Mar 2026	$.01 PV CL B STK	3,945	$35.61	Direct
holding	ATRO	Option						34,790	03 Mar 2026	$.01 PV Com Stk	34,790	$31.57	Direct
holding	ATRO	Option						61,200	03 Mar 2026	$.01 PV Com Stk	61,200	$30.04	Direct
holding	ATRO	Option						98,900	03 Mar 2026	$.01 PV Com Stk	98,900	$14.45	Direct
holding	ATRO	Option						115,800	03 Mar 2026	$.01 PV Com Stk	115,800	$11.13	Direct
holding	ATRO	Option						125,000	03 Mar 2026	$.01 PV Com Stk	125,000	$9.74	Direct
holding	ATRO	Option						83,900	03 Mar 2026	$.01 PV Com Stk	83,900	$15.15	Direct
holding	ATRO	Restricted Stock Unit						26,450	03 Mar 2026	$.01 PV Com Stk	26,450		Direct	F2, F3
holding	ATRO	Option						75,800	03 Mar 2026	$.01 PV Com Stk	75,800	$16.55	Direct
holding	ATRO	Restricted Stock Unit						25,250	03 Mar 2026	$.01 PV Com Stk	25,250		Direct	F2, F4
holding	ATRO	Option						29,750	03 Mar 2026	$.01 PV Com Stk	29,750	$51.72	Direct
holding	ATRO	Restricted Stock Unit						12,150	03 Mar 2026	$.01 PV Com Stk	12,150		Direct	F2, F5

* An asterisk sign (*) next to the price indicates that the price is likely invalid.

Explanation of Responses:

Id	Content
F1	Shares withheld by Astronics Corp. to satisfy applicable withholding tax upon vesting of restricted stock units.
F2	Each restricted stock unit represents the right to receive, at settlement, one share of common stock.
F3	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 23, 2027, with the vesting percentage determined based on actual performance.
F4	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.
F5	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.
F6	Vesting of these restricted stock units depends on Astronics Corp.'s average annual adjusted EBITDA for the period January 1, 2023- December 31, 2025. The amount shown reflects 100% of the target number of restricted stock units which vested on February 23, 2026.