Sec Form 4 Filing - WAGNER DAVID @ EVERBRIDGE, INC. - 2022-07-27

FORM 4 Check this box if no longer subject to Section 16. Form 4 or Form 5 obligations may continue. See Instruction 1(b).

UNITED STATES SECURITIES AND EXCHANGE COMMISSION Washington, D.C. 20549 STATEMENT OF CHANGES IN BENEFICIAL OWNERSHIP Filed pursuant to Section 16(a) of the Securities Exchange Act of 1934, Section 17(a) of the Public Utility Holding Company Act of 1935 or Section 30(h) of the Investment Company Act of 1940

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1. Name and Address of Reporting Person WAGNER DAVID 2. Issuer Name and Ticker or Trading Symbol EVERBRIDGE, INC. [ EVBG] 5. Relationship of Reporting Person(s) to Issuer (Check all applicable) X __ Director _____ 10% Owner X __ Officer (give title below) _____ Other (specify below) Chief Executive Officer (Last) (First) (Middle) C/O EVERBRIDGE, INC., 25 CORPORATE DRIVE 3. Date of Earliest Transaction (MM/DD/YY) 07/27/2022 (Street) BURLINGTON, MA01803 4. If Amendment, Date Original Filed (MM/DD/YY) 6. Individual or Joint/Group Filing (Check Applicable Line) __ X __ Form filed by One Reporting Person _____ Form filed by More than One Reporting Person (City) (State) (Zip)

Table I - Non-Derivative Securities Acquired, Disposed of, or Beneficially Owned 1.Title of Security (Instr. 3) 2. Transaction Date (MM/DD/YY) 2A. Deemed Execution Date, if any (MM/DD/YY) 3. Transaction Code (Instr. 8) 4. Securities Acquired (A) or Disposed of (D) (Instr. 3, 4 and 5) 5. Amount of Securities Beneficially Owned Following Reported Transaction(s) (Instr. 3 and 4) 6. Ownership Form: Direct (D) or Indirect (I) (Instr. 4) 7. Nature of Indirect Beneficial Ownership (Instr. 4) Code V Amount (A) or (D) Price

Table II - Derivative Securities Acquired, Disposed of, or Beneficially Owned ( e.g. , puts, calls, warrants, options, convertible securities) 1. Title of Derivative Security (Instr. 3) 2. Conversion or Exercise Price of Derivative Security 3. Transaction Date (MM/DD/YY) 3A. Deemed Execution Date, if any (MM/DD/YY) 4. Transaction Code (Instr. 8) 5. Number of Derivative Securities Acquired (A) or Disposed of (D) (Instr. 3, 4, and 5) 6. Date Exercisable and Expiration Date (MM/DD/YY) 7. Title and Amount of Underlying Securities (Instr. 3 and 4) 8. Price of Derivative Security (Instr. 5) 9. Number of Derivative Securities Beneficially Owned Following Reported Transaction(s) (Instr. 4) 10. Ownership Form of Derivative Security: Direct (D) or Indirect (I) (Instr. 4) 11. Nature of Indirect Beneficial Ownership (Instr. 4) Code V (A) (D) Date Exercisable Expiration Date Title Amount or Number of Shares Restricted Stock Unit $ 0 07/27/2022 A 200,000 ( 1 ) ( 2 ) Common Stock 200,000 $ 0 200,000 D Performance Stock Unit $ 0 07/27/2022 A 200,000 ( 3 ) ( 2 ) Common Stock 200,000 $ 0 200,000 D

Reporting Owners Reporting Owner Name / Address Relationships Director 10% Owner Officer Other WAGNER DAVID C/O EVERBRIDGE, INC. 25 CORPORATE DRIVE BURLINGTON, MA01803 X Chief Executive Officer Signatures Elliot J. Mark, Attorney-in-Fact 07/29/2022 Signature of Reporting Person Date

Explanation of Responses:

( 1 )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. The restricted stock units are scheduled to vest as to 25% on December 31, 2022 and the remaining 75% of the RSUs will vest in equal installments over twelve calendar quarters, with the first such installment vesting on October 31, 2023, such that all of the RSUs will be vested by July 31, 2026, as long as the reporting person remains in the service of Everbridge through the respective vesting date. The RSUs vesting on December 31, 2022 are subject to a one-year sale restriction, subject to certain exceptions described in the reporting person's employment agreement with Everbridge. ( 2 )Not applicable ( 3 )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. Upon the filing of Everbridge's Form 10-Q for the quarter ended June 30, 2024, up to 75% of the PSUs will become eligible to vest based on the compound annual growth rate (CAGR) achieved during the eight fiscal quarters ending December 31, 2023. Upon the filing of Everbridge's Form 10-Q for the quarter ended June 30, 2025, up to an additional 75% of the PSUs will become eligible to vest based on the CAGR achieved during the twelve fiscal quarters ending December 31, 2024.

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