X0407 4 2023-05-31 0 0001437352 EVERBRIDGE, INC. EVBG 0001770750 Brickley Patrick C/O EVERBRIDGE, INC. 25 CORPORATE DRIVE BURLINGTON MA 01803 0 1 0 0 EVP and CFO 0 Common Stock 2023-05-31 4 M 0 2253 A 98194 D Common Stock 2023-06-01 4 S 0 1008 23.8737 D 97186 D Restricted Stock Unit 2023-05-31 4 M 0 2253 0.00 D Common Stock 2253 24782 D Restricted stock units convert into common stock on a one-for-one basis. The Reporting Person previously reported the February 15, 2023 restricted stock unit ("RSU") award (the "Award") in Table I. The Reporting Person decided to change how the Award is reported by listing it in it Table II instead of Table I. This total excludes the 27,035 unvested RSUs subject to the Award. Represents the number of shares sold by the Reporting Person to cover tax withholding obligations in connection with the vesting of RSUs. On February 15, 2023, the reporting person was granted restricted stock units (RSUs). The first installment of the RSUs vested on May 31, 2023. The remaining RSUs will vest in equal installments over twelve calendar quarters, provided, however, as long as the reporting person remains in the service of Everbridge through the respective vesting date. Not applicable. Noah F. Webster, Attorney-in-Fact 2023-06-02