ASTRONICS CORP

SCHEDULE 14A

(Rule 14a-101)

INFORMATION REQUIRED IN PROXY STATEMENT

Schedule 14A Information

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of the Securities Exchange Act of

1934 (Amendment No. )

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130 Commerce Way East Aurora, New York, 14052

A LETTER FROM THE CHAIRMAN AND CEO

Dear Fellow Shareholders:

2025 was a very strong year for Astronics that reflected the effort of the team, the strength of our innovation and the power of our market leading positions. We advanced the momentum and energy that has been building over the last two years as we surpassed levels achieved prior to the pandemic. Importantly, we believe we are well positioned for an even stronger future.

I look forward to you joining us at the 2026 Astronics Corporation Annual Meeting of Shareholders which will be held in person at 10:00 a.m., Central Time, on Thursday, May 28, 2026, at Astronics Connectivity Systems & Certification Corp. at 804 S. Northpoint Blvd., Waukegan, Illinois 60085 USA. The attached Notice of 2026 Annual Meeting of Shareholders and Proxy Statement discuss the items scheduled to be voted on by shareholders at the Annual Meeting.

The Securities and Exchange Commission rules allow companies to furnish proxy materials to their shareholders over the Internet. As a result,

most of our shareholders will receive in the mail a notice regarding availability of the proxy materials for the Annual Meeting on the Internet instead of paper copies of those materials. This notice contains instructions on how to access the proxy materials over the Internet and instructions on how shareholders can receive paper copies of the proxy materials, including a proxy card or voting instruction form. This process expedites shareholders’ receipt of proxy materials and lowers the cost of our Annual Meeting.

Your vote is important to us. Whether or not you plan to attend, please sign, date and return the enclosed proxy card in the enclosed postage-paid envelope or vote by telephone or using the Internet as instructed on the enclosed proxy card. If you attend the Annual Meeting, you may vote your shares in person if you wish.

Please vote your shares as soon as possible. This is your Annual Meeting, and your participation is important.

Peter J. Gundermann

Chairman of the Board

East Aurora, New York