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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 OR TRANSITION REPORT PURSUANT TO SECTION 13 OR 15 ( d ) OF THE SECURITIES EXCHANGE ACT OF 1934 FORM 10 - K For the transition period from Georgia ( State or other jurisdiction of incorporation or organization ) Title of each class Common Stock , $ 1.25 par value Commission File Number 001-06605 EQUIFAX INC . ( Exact name of registrant as specified in its charter ) 1550 Peachtree Street N.W. Atlanta Georgia ( Address of principal executive offices ) to Form 10 - K . 58-0401110 ( I.R.S. Employer Identification No. ) 30309 ( Zip Code ) Registrant's telephone number , including area code : 404-885-8000 Securities registered pursuant to Section 12 ( b ) of the Act : Trading Symbol EFX per share Securities registered pursuant to Section 12 ( g ) of the Act : None . Indicate by check mark if Registrant is a well - known seasoned issuer , as defined in Rule 405 of the Securities Exchange Act ( " Act " ) . " Yes No Name of each exchange on which registered New York Stock Exchange Indicate by check mark if Registrant is not required to file reports pursuant to Section 13 or Section 15 ( d ) of the Act . Yes No Indicate by check mark whether 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 Non - accelerated filer 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 definitions of " large accelerated filer , " " accelerated filer , " " smaller reporting company " and " emerging growth company " in Rule 12b - 2 of the Exchange Act . ( Check one ) : Large accelerated filer Accelerated filer Smaller reporting 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 . 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 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 30 , 2020 , the aggregate market value of Registrant's common stock held by non - affiliates of Registrant was approximately $ 20,875,342,327 based on the closing sale price as reported on the New York Stock Exchange . At January 29 , 2021 , there were 121,788,082 shares of Registrant's common stock outstanding . DOCUMENTS INCORPORATED BY REFERENCE Portions of Registrant's definitive proxy statement for its 2021 annual meeting of shareholders are incorporated by reference in Part III of this