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fff ( Mark One ) ☐ UNITED STATES SECURITIES AND EXCHANGE COMMISSION Washington , D.C. 20549 FORM 10 - K 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 Commission File No. 1-12235 Delaware ( State or other jurisdiction of incorporation or organization ) Title of each class Common Stock , par value $ .001 per share Purchase rights to Triumph Group , Inc. ( Exact name of registrant as specified in its charter ) 899 Cassatt Road , Suite 210 , Berwyn , Pennsylvania 19312 ( Address of principal executive offices , including zip code ) Registrant's telephone number , including area code : ( 610 ) 251-1000 Securities registered pursuant to Section 12 ( b ) of the Act : Trading Symbol ( s ) TGI 51-0347963 ( I.R.S. Employer Identification Number ) Name of each exchange on which registered New York Stock Exchange New York Stock Exchange Securities registered pursuant to Section 12 ( g ) of the Act : None 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 Section 15 ( d ) of the Securities Exchange Act of 1934. Yes No 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 every Interactive Data File required to be submitted pursuant to Rule 405 of Regulation S - T 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 Securities Exchange Act of 1934. ( Check one ) Large accelerated filer || ▬ Non - accelerated filer 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 . 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 report . Indicate by check mark whether the Registrant is a shell company ( as defined in Rule 12b - 2 of the Securities Exchange Act of 1934 ) . Yes No 凶 As of September 30 , 2020 , the aggregate market value of the shares of Common Stock held by non - affiliates of the Registrant was approximately $ 336 million . Such aggregate market value was computed by reference to the closing price of the Common Stock as reported on the New York Stock Exchange on September 30 , 2020. For purposes of making this calculation only , the Registrant has defined affiliates as including all directors and executive officers . The number of outstanding shares of the Registrant's Common Stock , par value $ .001 per share , on May 17 , 2021 , was 64,220,262 . Documents Incorporated by Reference Portions of the following document are incorporated herein by reference : The Proxy Statement of Triumph Group , Inc. to be filed in connection with our 2021 Annual Meeting of Stockholders is incorporated in part in Part III hereof , as specified herein .