SCHEDULE 14A
(Rule 14a-101)
INFORMATION REQUIRED IN PROXY STATEMENT

Schedule 14A Information

Proxy Statement Pursuant to Section 14(a)
of the Securities Exchange Act of
1934 (Amendment No.  )

Filed by the Registrant ☒
Filed by a Party other than the Registrant ☐

Check the appropriate box:

☐ Preliminary Proxy Statement

☐ Confidential, for Use of the Commission Only (as permitted by Rule 14a-6(e)(2))

☐ Definitive Proxy Statement

☒ Definitive Additional Materials

☐ Soliciting Material Pursuant §240.14a-12

ASTRONICS CORPORATION

(Name of Registrant as specified in its charter)

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