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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 December 31 , 2020 Delaware ( State or other jurisdiction of incorporation or organization ) Securities registered pursuant to Section 12 ( b ) of the Act : Title of each class Common Stock , par value $ 0.01 per share Commission File Number 001-14962 CIRCOR Large accelerated filer Non - accelerated filer CIRCOR INTERNATIONAL , INC . ( Exact name of registrant as specified in its charter ) 001-14962 ( Commission File Number ) 30 CORPORATE DRIVE , SUITE 200 Burlington , MA ( Address of principal executive offices and Zip Code ) ( 781 ) 270-1200 ( Registrant's telephone number , including area code ) Trading Symbol ( s ) CIR 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 Exchange Act . 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 ( § 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 Accelerated filer Smaller reporting company 04-3477276 ( I.R.S. Employer Identification 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 . Emerging growth company 01803-4238 ( Zip Code ) Name of each exchange on which registered New York Stock Exchange Indicate by check mark whether the registrant is a shell company ( as defined in Rule 12b - 2 of the Exchange Act ) . Yes No > 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 . Yes No As of March 10 , 2021 , there were 20,155,251 shares of the registrant's Common Stock outstanding . Indicate by check mark whether the registrant has filed a report 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 . > DOCUMENTS INCORPORATED BY REFERENCE The aggregate market value of voting stock held by non - affiliates of the registrant as of June 28 , 2020 was $ 443,948,186 . The registrant does not have any non - voting common equity . □ Part III incorporates by reference certain portions of the information from the registrant's definitive Proxy Statement for the 2021 Annual Meeting of Stockholders to be held on May 25 , 2021. The definitive Proxy Statement will be filed with the Securities and Exchange Commission within 120 days of the close of the registrant's year ended December 31 , 2020 .