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UNITED STATES SECURITIES AND EXCHANGE COMMISSION WASHINGTON , D.C. 20549 FORM 10 - K ( Mark One ) ANNUAL REPORT PURSUANT TO SECTION 13 OR 15 ( d ) OF THE SECURITIES EXCHANGE ACT OF 1934 For the fiscal year ended March 31 , 2021 or TRANSITION REPORT PURSUANT TO SECTION 13 OR 15 ( d ) OF THE SECURITIES EXCHANGE ACT OF 1934 For the transition period from to Commission File Number 1-8462 GRAHAM CORPORATION ( Exact name of Registrant as specified in its charter ) Delaware ( State or other jurisdiction of incorporation or organization ) 20 Florence Avenue , Batavia , New York ( Address of principal executive offices ) Securities registered pursuant to Section 12 ( b ) of the Act : Title of each class Common Stock , Par Value $ 0.10 Per Share Large accelerated filer Non - accelerated filer Registrant's telephone number , including area code 585-343-2216 16-1194720 ( I.R.S. Employer Identification No. ) 14020 ( Zip Code ) Trading Symbol ( s ) GHM X Securities registered pursuant to Section 12 ( g ) of the Act : Preferred Stock Purchase Rights Indicate by check mark if the Registrant is a well - known seasoned issuer , as defined in Rule 405 of the Securities Act . YES NO Indicate by check mark if the Registrant is not required to file reports pursuant to Section 13 or 15 ( d ) of the Act . YES □ NO É 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 Name of each exchange on which registered NYSE Indicate by check mark whether the Registrant has submitted electronically every Interactive Data File required to be submitted 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 such files ) . YES NO Indicate by check mark whether the Registrant is a large accelerated filer , an accelerated filer , a non - accelerated filer , a smaller reporting company , or an emerging growth company . See the definitions of " large accelerated filer , " " accelerated filer , " " smaller reporting company , " and " emerging growth company " in Rule 12b - 2 of the Exchange Act . Accelerated filer Smaller reporting company Emerging growth company If an emerging growth company , indicate by check mark if the Registrant has elected not to use the extended transition period for complying with any new or revised financial accounting standards provided pursuant to Section 13 ( a ) of the Exchange Act . □ X Indicate by checkmark 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 . Indicate by checkmark whether the Registrant is a shell company ( as defined in Rule 12b - 2 of the Act ) . Yes No The aggregate market value of the Registrant's Common Stock held by non - affiliates of the Registrant , based on the closing price of the shares of common stock on the NYSE Stock Market on September 30 , 2020 , was $ 121,846,373 . As of May 26 , 2021 , the Registrant's Common Stock outstanding was 9,949,925 shares , $ 0.10 par value . 1