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Table of Contents ( Mark One ) X 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 FOR THE TRANSITION PERIOD FROM ΤΟ FORM 10 - K Delaware ( State or other jurisdiction of incorporation or organization ) RAPID7 , INC . ( Exact name of registrant as specified in its charter ) 120 Causeway Street Boston , MA ( Address of principal executive offices ) Commission File Number 001-37496 Secur es registered pursuant to Section 12 ( b ) of the Act : Title of each class Common Stock , par value $ 0.01 per share 35-2423994 ( I.R.S. Employer Identification No. ) 02114 ( Zip Code ) Registrant's telephone number , including area code : ( 617 ) 247-1717 Trading Symbol ( s ) . RPD 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 Name of each exchange on which registered The Nasdaq Global Market 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 and post such files ) . Yes > No Indicate by check mark whether the registrant is a large accelerated filer , an accelerated filer , a non - accelerated filer , or a smaller reporting company . See the definition of " large accelerated filer " , " accelerated filer " , and " smaller reporting company " in Rule 12b - 2 of the Exchange Act . ( Check one ) : Large Accelerated Filer Accelerated Filer Non - accelerated Filer Small 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 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 . Yes No Indicate by check mark whether the registrant is a shell company ( as defined in Rule 12b - 2 of the Exchange Act ) . Yes No As of June 30 , 2020 , the aggregate market value of the registrant's voting common stock held by non - affiliates of the registrant , based on a closing price of $ 51.02 per share of the registrant's common stock as reported on The Nasdaq Global Market on June 30 , 2020 , was approximately $ 2,559,421,616 .