X0306 4 2022-04-30 0 0001437352 EVERBRIDGE, INC. EVBG 0001764375 HUFF PHILLIP E C/O EVERBRIDGE, INC. 25 CORPORATE DRIVE BURLINGTON MA 01803 0 1 0 0 VP, Chief Accounting Officer Common Stock 2022-04-30 4 M 0 343 A 4139 D Common Stock 2022-04-30 4 F 0 119 43.10 D 4020 D Restricted Stock Unit 0.00 2022-04-30 4 M 0 343 0.00 D Common Stock 343 695 D Restricted stock units convert into common stock on a one-for-one basis. Represents shares of Common Stock withheld by the Company to satisfy tax withholding obligations in connection with the net issuance of shares of Common Stock delivered to the Reporting Person on April 30, 2022, from the vesting of restricted stock units. Shares withheld by the Company to satisfy tax withholding obligations (and the net issuance) are based on the closing price of the Company's Common Stock on April 29, 2022. On May 5, 2021, the reporting person was granted restricted stock units (RSUs). 33% of the RSUs vested on April 30, 2022. Subject to accelerated vesting in certain circumstances, the restricted stock units are scheduled to vest 33% on April 30, 2023, and 34% on April 30, 2024, as long as the reporting person remains in the service of Everbridge through the respective vesting date. Not applicable. Elliot J. Mark, Attorney-in-Fact 2022-05-03