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UNITED STATES SECURITIES AND EXCHANGE COMMISSION Washington , D.C. 20549 ANNUAL REPORT PURSUANT TO SECTION 13 OR 15 ( d ) OF THE SECURITIES EXCHANGE ACT OF 1934 or TRANSITION REPORT PURSUANT TO SECTION 13 OR 15 ( d ) OF THE SECURITIES EXCHANGE ACT OF 1934 For the transition period from_ to For the Fiscal Year Ended December 31 , 2020 Commission File Number 0-7087 New York ( State or other jurisdiction of incorporation or organization ) Form 10 - K Astronics Corporation ( Exact Name of Registrant as Specified in its Charter ) Title of each class Common Stock , $ .01 par value 130 Commerce Way , East Aurora , NY 14052 ( Address of principal executive office ) Registrant's telephone number , including area code ( 716 ) 805-1599 16-0959303 ( I.R.S. Employer Identification No. ) Securities registered pursuant to Section 12 ( b ) of the Act : None Securities registered pursuant to Section 12 ( g ) of the Act : Trading Symbol ATRO per share Name of each exchange on which registered NASDAQ Stock Market Indicate by check mark if the registrant is a well - known seasoned issuer , as defined in Rule 405 of the Securities Act . Yes O No > Indicate by check mark if the registrant is not required to file reports pursuant to Section 13 or Section 15 ( d ) of the Act . Yes No X Indicate by check mark whether the registrant ( 1 ) has filed all reports required to be filed by Section 13 or 15 ( d ) of the Securities Exchange Act of 1934 during the preceding 12 months ( or for such shorter period that the registrant was required to file such reports ) , and ( 2 ) has been subject to such filing requirements for the past 90 days . Yes No Indicate by check mark whether the registrant has submitted electronically and posted on its corporate Web site , if any , every Interactive Data File required to be submitted and posted pursuant to Rule 405 of Regulation S - T ( §232.405 of this chapter ) during the preceding 12 months ( or for such shorter period that the registrant was required to submit and post such files ) . Yes No Indicate by check mark if disclosure of delinquent filers pursuant to Item 405 of Regulation S - K is not contained herein , and will not be contained , to the best of the registrant's knowledge , in definitive proxy or information statements incorporated by reference in Part III of this Form 10 - K or any amendment to this Form 10 - K . > Indicate by check mark whether the registrant is a large accelerated filer , an accelerated filer , a non - accelerated filer or a smaller reporting company . See definition of “ large accelerated filer ” , an “ accelerated filer ” , a “ non - accelerated filer ” and a “ smaller reporting company " in Rule 12b - 2 of the Exchange Act . ( Check one ) : Large accelerated filer Non - accelerated filer Accelerated filer Smaller Reporting Company Indicate by check mark whether the registrant has filed a report on and attestation to its management's assessment of the effectiveness of its internal control over financial reporting under Section 404 ( b ) of the Sarbanes - Oxley Act ( 15 U.S.C. 7262 ( b ) ) by the registered public accounting firm that prepared or issued its audit report . Î Indicate by check mark whether the registrant is a shell company ( as defined in Rule 12b - 2 of the Act ) . Yes No | As of February 18 , 2021 , 30,894,143 shares were outstanding , consisting of 24,033,041 shares of Common Stock $ .01 par value and 6,861,102 shares of Class B Stock $ .01 par value . The aggregate market value , as of the last business day of the Company's most recently X