X0306 4 2017-05-16 0 0001437352 EVERBRIDGE, INC. EVBG 0001176008 HENSHALL DAVID J 18880 HOMESTEAD ROAD CUPERTINO CA 95014 1 0 0 0 Stock Option (Right to Buy) 24.87 2017-05-16 4 A 0 7500 0 A 2027-05-16 Common Stock 7500 7500 D This Stock Option vests in full on the earlier of: (i) the date of the Issuer's next annual meeting of stockholders held after the date of the grant or (ii) the first anniversary of the date of grant, in each case subject to the Reporting Person's continued service with the Issuer through the applicable vesting date. /s/ Elliot J. Mark, Attorney-in-Fact 2017-05-23