X0306 4 2022-10-31 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 2022-10-31 4 M 0 179 A 6214 D Common Stock 2022-10-31 4 F 0 62 31.33 D 6152 D Restricted Stock Unit 0.00 2022-10-31 4 M 0 179 0.00 D Common Stock 179 1782 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 October 31, 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 October 31, 2022. On April 5, 2022, the reporting person was granted restricted stock units (RSUs). Subject to accelerated vesting in certain circumstances, the restricted stock units are scheduled to vest in equal installments over twelve calendar quarters, such that all of the restricted stock units will be vested on July 31, 2025, provided, however, 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 2022-11-02