Sec Form 4 Filing - Rockvam David E @ EVERBRIDGE, INC. - 2024-03-07

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 Rockvam David E 2. Issuer Name and Ticker or Trading Symbol EVERBRIDGE, INC. [ EVBG] 5. Relationship of Reporting Person(s) to Issuer (Check all applicable) _____ Director _____ 10% Owner X __ Officer (give title below) _____ Other (specify below) Chief Financial Officer (Last) (First) (Middle) 25 CORPORATE DRIVE, 4TH FLOOR 3. Date of Earliest Transaction (MM/DD/YY) 03/07/2024 (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 Units ( 1 ) 03/07/2024 A 115,000 ( 2 ) ( 3 ) Common Stock 115,000 $ 0 115,000 D Performance Stock Unit ( 1 ) 03/07/2024 A 115,000 ( 4 ) ( 3 ) Common Stock 115,000 $ 0 115,000 D

Reporting Owners Reporting Owner Name / Address Relationships Director 10% Owner Officer Other Rockvam David E 25 CORPORATE DRIVE 4TH FLOOR BURLINGTON, MA01803 Chief Financial Officer Signatures /s/Noah F. Webster, Attorney-in-Fact 03/28/2024 Signature of Reporting Person Date

Explanation of Responses:

( 1 )Each restricted stock unit represents the contingent right to receive one share of Everbridge common stock. ( 2 )Represents a restricted stock unit ("RSU") award. Twenty-five percent (25%) of the total number of RSUs shall vest on February 28, 2025 and the remaining RSUs shall vest in 12 equal quarterly installments thereafter, subject to the Reporting Person remaining in the service of Issuer through each vesting date. ( 3 )Not applicable. ( 4 )Represents a grant of performance-based restricted stock units ("PSU") under the Issuer's 2022 Inducement Plan. Each PSU represents the contingent right to receive, upon vesting of the unit, one share of the Issuer's common stock. Upon the filing of Everbridge's Form 10-Q for the quarter ended March 31, 2026, up to 62.5% of the PSUs will become eligible to vest based on (a) the compound annual growth rate (CAGR) achieved during the eight fiscal quarters ending December 31, 2025, weighted at 50%, and (b) the adjusted earnings before interest, taxes, depreciation, and amortization ("AEBITDA"), weighted at 50%. Upon the filing of Everbridge's Form 10-Q for the quarter ended March 31, 2027, up to an additional 62.5% of the PSUs will become eligible to vest based on (a) the CAGR achieved during the twelve fiscal quarters ending December 31, 2026, weighted at 50%, and (b) the AEBITDA weighted at 50%.

Reminder: Report on a separate line for each class of securities beneficially owned directly or indirectly.

* If the form is filed by more than one reporting person, see Instruction 4(b)(v).

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