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( 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 to Commission File Number : 001-37874 UNITED STATES SECURITIES AND EXCHANGE COMMISSION Washington , D.C. 20549 FORM 10 - K Delaware ( State or other jurisdiction of incorporation or organization ) 25 Corporate Drive , Suite 400 Burlington , Massachusetts ( Address of principal executive offices ) Large accelerated filer Non - accelerated filer Everbridge , Inc. ( Exact name of registrant as specified in its charter ) X Registrant's telephone number , including area code : ( 818 ) 230-9700 Securities registered pursuant to Section 12 ( b ) of the Securities Act : Title of each class Common Stock , $ 0.001 par value per share 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 26-2919312 ( I.R.S. Employer Identification No. ) Trading symbol ( s ) EVBG 01803 ( Zip Code ) 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 Name of each exchange on which registered The Nasdaq Global Market 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 . 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 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 ooo 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 registrant's common stock on June 30 , 2020 ( the last business day of the registrant's most recently completed second fiscal quarter ) , as reported on the Nasdaq Global Market on such date , was approximately $ 4.3 billion . Shares of the registrant's common stock held by each executive officer , director and holder of 10 % or more of the registrant's outstanding common stock have been excluded from this calculation as such persons may be deemed to be affiliates . This calculation does not reflect a determination that these persons are affiliates of the registrant for any other purpose . The number of shares of registrant's Common Stock outstanding as of February 23 , 2021 was 36,245,475 . DOCUMENTS INCORPORATED BY REFERENCE Portions of the registrant's Definitive Proxy Statement for its 2021 Annual Meeting of Stockholders to be filed with the Securities and Exchange Commission pursuant to Regulation 14A not later than 120 days after the end of the fiscal year covered by this Annual Report on Form 10 - K are incorporated by reference into Part III of this Annual Report on Form 10 - K .