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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 ΤΟ Delaware ( State or other jurisdiction of incorporation or organization ) 1LIFE HEALTHCARE , INC . ( Exact name of Registrant as specified in its Charter ) One Embarcadero Center , Suite 1900 San Francisco , CA 94111 ( Address of principal executive offices ) Title of each class Common Stock , $ 0.001 par value Commission File Number 001-39203 Securities registered pursuant to Section 12 ( b ) of the Act : Registrant's telephone number , including area code : ( 415 ) 814-0927 Trading Symbol ( s ) ONEM 76-0707204 ( I.R.S. Employer Identification No. ) 94111 ( Zip Code ) Name of each exchange on which registered The Nasdaq Global Select Market 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 Indicate by check mark if the Registrant is not required to file reports pursuant to Section 13 or 15 ( d ) of the Act . Yes No 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 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 . 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 Exchange Act ) . Yes No The aggregate market value of the voting and non - voting common equity held by non - affiliates of the Registrant , based on the closing price of the shares of common stock on The Nasdaq Stock Market on June 30 , 2020 , was $ 2.5 billion . The calculation of the aggregate market value of voting and non - voting common equity excludes 58,490,353 shares of common stock of the Registrant held by executive officers , directors and stockholders that the Registrant concluded were affiliates of the Registrant on that date . Exclusion of such shares should not be construed to indicate that any such person possesses the power , direct or indirect , to direct or cause the direction of the management or policies of the Registrant or that such person is controlled by or under common control with the Registrant . The number of shares of Registrant's common stock , par value $ 0.001 per share , outstanding as of February 26 , 2021 was 136,840,853 . DOCUMENTS INCORPORATED BY REFERENCE Portions of the Registrant's definitive Proxy Statement relating to the 2021 Annual Meeting of Stockholders ( the " Proxy Statement " ) are incorporated by reference into Part III of this Annual Report on Form 10 - K where indicated . The Proxy Statement will be filed with the Securities and Exchange Commission within 120 days of the Registrant's fiscal year ended December 31 , 2020 .