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Table of Contents UNITED STATES SECURITIES AND EXCHANGE COMMISSION Washington , D.C. 20549 FORM 10 - K ý 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 O TRANSITION REPORT PURSUANT TO SECTION 13 OR 15 ( d ) OF THE SECURITIES EXCHANGE ACT OF 1934 Commission file number 001-39725 Maravai Life Sciences Holdings , Inc. ( Exact name of registrant as specified in its charter ) Delaware ( State or other jurisdiction of incorporation or organization ) Large accelerated filer Non - accelerated filer 8731 ( Primary Standard Industrial Classification Code Number ) Securities registered pursuant to Section 12 ( b ) of the Act : Title of each class Class A common stock , $ 0.01 par value 10770 Wateridge Circle Suite 200 San Diego , California 92121 ( Address of principal executive offices ) Registrant's telephone number , including area code : ( 858 ) 546-0004 O Trading Symbol ( s ) ý MRVI 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 o No x Indicate by check mark if the registrant is not required to file reports pursuant to Section 13 or Section 15 ( d ) of the Act . Yes o 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 o 85-2786970 ( I.R.S. Employer Identification No. ) Indicate by check mark whether the registrant has submitted electronically and posted on its corporate web site , if any , every Interactive Data File required to be submitted and posted 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 and post such files ) . Yes x No o Name of each exchange on which registered The Nasdaq Stock Market LLC 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 " and " smaller reporting company " in Rule 12b - 2 of the Exchange Act . ( Check one ) : Accelerated filer Smaller reporting company Emerging growth company O ý 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 . O Indicate by check mark whether the registrant is a shell company ( as defined in Rule 12b - 2 of the Act ) . Yes No x The registrant was not a public company as of June 30 , 2020 , the last business day of its most recently completed second fiscal quarter and therefore cannot calculate the aggregate market value of its voting and non - voting common equity held by non - affiliates as of such date . The registrant's Class A common stock began trading on the Nasdaq Global Select Market on November 20 , 2020 . As of March 17 , 2021 , 96,646,515 shares of the registrant's Class A common stock were outstanding and 160,974,129 shares of the registrant's Class B common stock were outstanding . DOCUMENTS INCORPORATED BY REFERENCE The information required by Part III of this Report , to the extent not set forth herein , is incorporated herein by reference from the registrant's definitive proxy statement relating to the Annual Meeting of Shareholders to be held in 2021 , which definitive proxy statement shall be filed with the Securities and Exchange Commission within 120 days after the end of the fiscal year to which this Report relates .