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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 transition period from TRANSITION REPORT PURSUANT TO SECTION 13 OR 15 ( d ) OF THE SECURITIES EXCHANGE ACT OF 1934 to For the fiscal year ended December 31 , 2020 or QUAKER CHEMICAL CORPORATION ( Exact name of Registrant as specified in its charter ) A Pennsylvania Corporation ( State or other jurisdiction of incorporation or organization ) 901 E. Hector Street , Conshohocken , Pennsylvania ( Address of principal executive offices ) Title of each class Common Stock , $ 1 par value Commission file number 001-12019 Registrant's telephone number , including area code : ( 610 ) 832-4000 Securities registered pursuant to Section 12 ( b ) of the Act : Trading Symbol ( s ) KWR Large accelerated filer Non - accelerated filer No. 23-0993790 ( I.R.S. Employer Identification No. ) Securities registered pursuant to Section 12 ( g ) of the Act : None 19428-2380 ( Zip Code ) Name of each exchange on which registered New York Stock Exchange Indicate by check mark if the Registrant is a well - known seasoned issuer , as defined in Rule 405 of the Securities Act . Indicate by check mark if the Registrant is not required to file reports pursuant to Section 13 or Section 15 ( d ) of the Act . 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 Yes ☐ No ' 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 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 . 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 . Yes No □ Indicate by check mark whether the Registrant is a shell company ( as defined in Rule 12b - 2 of the Act ) . Yes No | State the aggregate market value of the voting and non - voting common equity held by non - affiliates computed by reference to the price at which the common equity was last sold as of the last business day of the Registrant's most recently completed second fiscal quarter . ( The aggregate market value is computed by reference to the last reported sale on the New York Stock Exchange on June 30 , 2020 ) : $ 3,273,904,147 Indicate the number of shares outstanding of each of the Registrant's classes of common stock , as of the latest practicable date : 17,853,700 shares of Common Stock , $ 1.00 Par Value , as of January 31 , 2021 . DOCUMENTS INCORPORATED BY REFERENCE Portions of the Registrant's definitive Proxy Statement relating to the 2021 Annual Meeting of Shareholders are incorporated by reference into Part III .