Sec Form 4 Filing - Savino Anthony @ Altus Power, Inc. - 2024-03-22

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 Savino Anthony 2. Issuer Name and Ticker or Trading Symbol Altus Power, Inc. [ AMPS] 5. Relationship of Reporting Person(s) to Issuer (Check all applicable) _____ Director _____ 10% Owner X __ Officer (give title below) _____ Other (specify below) COFOUNDER,CHIEF CONST. OFFICER (Last) (First) (Middle) C/O ALTUS POWER, INC., 2200 ATLANTIC STREET, 6TH FLOOR 3. Date of Earliest Transaction (MM/DD/YY) 03/22/2024 (Street) STAMFORD, CT06902 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 Class A Common Stock 03/22/2024 F 27,679 ( 1 ) D $ 4.79 3,859,984 D Class A Common Stock 03/28/2024 A 92,719 ( 2 ) A $ 0 3,952,703 D Class A Common Stock 03/28/2024 A 144,351 ( 3 ) A $ 0 4,097,054 D

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 Performance Stock Unit ( 4 ) 03/28/2024 A 96,234 ( 4 ) 03/28/2027 Class A Common Stock 96,234 $ 0 96,234 D

Reporting Owners Reporting Owner Name / Address Relationships Director 10% Owner Officer Other Savino Anthony C/O ALTUS POWER, INC. 2200 ATLANTIC STREET, 6TH FLOOR STAMFORD, CT06902 COFOUNDER,CHIEF CONST. OFFICER Signatures /s/ Sophia Lee, as Attorney-in-Fact 04/05/2024 Signature of Reporting Person Date

Explanation of Responses:

( 1 )Company withheld securities to cover payment of withholding tax liability incident to the vesting of a security issued in accordance with Rule 16b-3. ( 2 )Represents 92,719 restricted stock units ("RSUs") granted to the Reporting Person on the transaction date pursuant to the Altus Power, Inc. 2021 Omnibus Incentive Plan (the "Plan"). Each RSU represents the right to receive one share of the Issuer's Class A Common Stock. The RSUs are subject the Reporting Person's continued service to the Issuer and vesting as follows: 50% vesting on the first anniversary of the grant date and 50% vesting on the second anniversary of the grant date. ( 3 )Represents 144,351 RSUs granted to the Reporting Person on the transaction date pursuant to the Plan. Each RSU represents the right to receive one share of Issuer's Class A Common Stock. The RSUs are subject the Reporting Person's continued service to the Issuer and vesting as follows: approximately 33.3% vesting on the first anniversary of the grant date, approximately 33.3% vesting on the second anniversary of the grant date, and approximately 33.4% vesting on the third anniversary of the grant date. ( 4 )Represents 96,234 performance stock units, each of which represents the right to receive one share of the Issuer's Class A Common Stock and which vest in one installment on the third anniversary of the grant date based upon the Issuer's total stockholder return when compared to the Invesco Solar ETF ("TAN"), subject to certain adjustments, and the Russell 2000 index, assigning a weight of 50% to each. The number of performance stock units vested, and thus shares of Class A Common Stock issued, could range from 0 to 150% of the amount reported on this Form 4.

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).

** Intentional misstatements or omissions of facts constitute Federal Criminal Violations. See 18 U.S.C. 1001 and 15 U.S.C. 78ff(a).

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