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  OR ☐ TRANSITION REPORT PURSUANT TO SECTION 13 OR 15(d) OF THE SECURITIES EXCHANGE ACT OF 1934 For the transition period from to  Commission File Number 001-06605 ____________________________________ EQUIFAX INC. (Exact name of registrant as specified in its charter) 58-0401110 (I.R.S. Employer Identification No.) Georgia (State or other jurisdiction of incorporation or organization) (Address of principal executive offices) (Zip Code) 1550 Peachtree Street N.W. Atlanta Georgia 30309 Registrant’s telephone number, including area code: 404-885-8000 Securities registered pursuant to Section 12(b) of the Act:  Title of each class Common Stock, $1.25 par value per share Trading Symbol EFX Name of each exchange on which registered New York Stock Exchange 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 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 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 ☐ Non-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. ☒ 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. Portions of Registrant’s definitive proxy statement for its 2021 annual meeting of shareholders are incorporated by reference in Part III of this Form 10-K. DOCUMENTS INCORPORATED BY REFERENCE ____________________________________