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UNITED STATES SECURITIES AND EXCHANGE COMMISSION Washington , D.C. 20549 FORM 10 - K ( Mark One ) 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 1934 . PERDOCEO EDUCATION CORPORATION ( Exact name of Registrant as specified in its charter ) Delaware ( State of or other jurisdiction of incorporation or organization ) 231 N. Martingale Road Schaumburg , Illinois ( Address of principal executive offices ) to Commission File Number 0-23245 Title of each class Common Stock , $ 0.01 par value 36-3932190 ( I.R.S. Employer Identification No. ) 60173 ( zip code ) Registrant's telephone number , including area code : ( 847 ) 781-3600 Securities registered pursuant to Section 12 ( b ) of the Act : Trading symbol ( s ) □□□ Name of each exchange on which registered Nasdaq Global Select Market PRDO Securities registered pursuant to Section 12 ( g ) of the Act : None Indicate by check mark whether the Registrant is a well - known seasoned issuer , as defined in Rule 405 of the Securities Act of 1933. Yes X No Indicate by check mark if the Registrant is not required to file reports pursuant to Section 13 or 15 ( d ) of the Securities Exchange Act of Yes No X 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 X 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 X 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 . Large accelerated filer Non - accelerated filer 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 Securities Exchange Act of 1934. Yes No X The aggregate market value of the Registrant's voting common stock held by non - affiliates of the Registrant , based upon the $ 15.93 per share closing sale price of the Registrant's common stock on June 30 , 2020 ( the last business day of the Registrant's most recently completed second quarter ) , was approximately $ 923,000,000 . For purposes of this calculation , the Registrant's directors , executive officers and 10 % or greater stockholders have been assumed to be affiliates . This assumption of affiliate status is not necessarily a conclusive determination for other purposes . As of February 16 , 2021 , the number of outstanding shares of Registrant's common stock was 70,062,364 . DOCUMENTS INCORPORATED BY REFERENCE Portions of the Registrant's Notice of Annual Meeting and Proxy Statement for the Registrant's 2021 Annual Meeting of Stockholders are incorporated by reference into Part III of this Report .