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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 For the fiscal year ended December 31 , 2020 TRANSITION REPORT PURSUANT TO SECTION 13 OR 15 ( d ) OF THE SECURITIES EXCHANGE ACT OF 1934 Title of each class Common Stock , $ 0.10 par value FORM 10 - K For the transition period from Delaware ( State or other jurisdiction of incorporation or organization ) 622 THIRD AVENUE , 38th Floor New York , New York ( Address of principal executive office ) Commission file number 1-11430 MINERALS TECHNOLOGIES INC . ( Exact name of registrant as specified in its charter ) to Large Accelerated Filer > Non - accelerated Filer ( 212 ) 878-1800 ( Registrant's telephone number , including area code ) Securities registered pursuant to Section 12 ( b ) of the Act : Trading Symbol MTX Indicate by check mark if Registrant is not required to file reports pursuant to Section 13 or 15 ( d ) of the Act . Yes No ( I.R.S. Employer Identification Number ) 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 25-1190717 Accelerated Filer Smaller Reporting Company Name of each exchange on which registered New York Stock Exchange 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 10017-6707 ( Zip Code ) 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 , 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 DOCUMENTS INCORPORATED BY REFERENCE 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 . 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 . § Indicate by check mark whether the Registrant is a shell company ( as defined in Rule 12b - 2 of the Act ) . Yes No As of June 26 , 2020 , the aggregate market value of the voting stock held by non - affiliates of the Registrant ( based upon the closing price at which the stock was sold as of June 26 , 2020 ) was approximately $ 1.3 billion . Solely for the purposes of this calculation , shares of common stock held by officers , directors and beneficial owners of 10 % or more of the outstanding common stock have been excluded in that such persons may be deemed to be affiliates . This determination of affiliate status is not necessarily a conclusive determination for other purposes . As of February 3 , 2021 , the Registrant had outstanding 33,847,751 shares of common stock , all of one class . Portions of the registrant's Proxy Statement for its 2021 Annual Meeting of Stockholders are incorporated herein by reference in Part III of this Annual Report on Form 10 - K .