Elliot J. Mark - May 5, 2021 Form 4 Insider Report for EVERBRIDGE, INC. (EVBG)

Derivative Securities (e.g., puts, calls, warrants, options, convertible securities)

Type	Sym	Class	Transaction	Value $	Shares	Change %	* Price $	Shares After	Date	Underlying Class	Amount	Exercise Price	Ownership	Footnotes
transaction	EVBG	Restricted Stock Unit	Award	$0	+5.81K		$0.00	5.81K	May 5, 2021	Common Stock	5.81K	$0.00	Direct	F1, F2
transaction	EVBG	Performance-based Restricted Stock Unit	Award	$0	+5.81K		$0.00	5.81K	May 5, 2021	Common Stock	5.81K	$0.00	Direct	F3

* An asterisk sign (*) next to the price indicates that the price is likely invalid.

Id	Content
F1	Represents a grant of restricted stock units under the Everbridge, Inc. 2016 Equity Incentive Plan. Each restricted stock unit represents the contingent right to receive, upon vesting of the unit, one share of Everbridge common stock. Subject to accelerated vesting in certain circumstances, the restricted stock units are scheduled to vest 33% on May 31, 2022, 33% on May 31, 2023, and 34% on May 31, 2024, as long as the reporting person remains in the service of Everbridge through the respective vesting date.
F2	Not applicable.
F3	Represents a grant of performance-based restricted stock units ("PSU") under the Everbridge, Inc. 2016 Equity Incentive Plan. Each PSU represents the contingent right to receive, upon vesting of the unit, one share of Everbridge common stock. Up to seventy-five percent (75%) of the PSUs will become eligible to vest at the end of the fiscal quarter after the second anniversary of the grant date based on the compound annual growth rate ("CAGR") achieved during the eight fiscal quarters preceding the then most recent fiscal quarter, and up to an additional seventy-five percent (75%) of the PSUs will become eligible to vest at the end of the fiscal quarter after the third anniversary of the grant date based on the CAGR achieved during the 12 fiscal quarters preceding the then most recent fiscal quarter.