Sec Form 4 Filing - CBRE Acquisition Sponsor, LLC @ Altus Power, Inc. - 2022-09-20

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 CBRE Acquisition Sponsor, LLC 2. Issuer Name and Ticker or Trading Symbol Altus Power, Inc. [ AMPS] 5. Relationship of Reporting Person(s) to Issuer (Check all applicable) X __ Director X __ 10% Owner _____ Officer (give title below) _____ Other (specify below) (Last) (First) (Middle) C/O CBRE GROUP, INC., 2100 MCKINNEY AVENUE SUITE 1250 3. Date of Earliest Transaction (MM/DD/YY) 09/20/2022 (Street) DALLAS, TX75201 4. If Amendment, Date Original Filed (MM/DD/YY) 6. Individual or Joint/Group Filing (Check Applicable Line) _____ Form filed by One Reporting Person __ X __ 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 09/20/2022 M( 1 ) 9,237,749 A 31,239,560 I Held through CBRE Acquisition Sponsor, LLC( 2 ) Class A Common Stock 09/20/2022 D( 1 ) 6,685,359( 3 ) D 24,554,201 I Held through CBRE Acquisition Sponsor, LLC( 2 )

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 Warr ants (Right to Buy) ( 1 ) 09/20/2022 M( 1 ) 9,237,749 01/08/2022 12/09/2026 Class A Common Stock 9,237,749 $ 0 0 I Held through CBRE Acquisition Sponsor, LLC( 2 )

Reporting Owners Reporting Owner Name / Address Relationships Director 10% Owner Officer Other CBRE Acquisition Sponsor, LLC C/O CBRE GROUP, INC. 2100 MCKINNEY AVENUE SUITE 1250 DALLAS, TX75201 X X CBRE SERVICES, INC. C/O CBRE GROUP, INC. 2100 MCKINNEY AVENUE SUITE 1250 DALLAS, TX75201 X X CBRE GROUP, INC. 2100 MCKINNEY AVENUE SUITE 1250 DALLAS, TX75201 X X Signatures CBRE ACQUISITION SPONSOR, LLC, By: /s/ Emma E. Giamartino, Name: Emma E. Giamartino, Title: Global Group President, Chief Financial Officer and Chief Investment Officer 09/23/2022 Signature of Reporting Person Date CBRE SERVICES, INC., By: /s/ Emma E. Giamartino, Name: Emma E. Giamartino, Title: Global Group President, Chief Financial Officer and Chief Investment Officer 09/23/2022 Signature of Reporting Person Date CBRE GROUP, INC., By: /s/ Emma E. Giamartino, Name: Emma E. Giamartino, Title: Global Group President, Chief Financial Officer and Chief Investment Officer 09/23/2022 Signature of Reporting Person Date

Explanation of Responses:

( 1 )Following the issuer's notice of redemption of all outstanding warrants to purchase the issuer's Class A Common Stock, the reporting person exercised its warrants in a make-whole exercise on a cashless basis. The reporting person received 0.2763 shares of Class A Common Stock and the issuer withheld 0.7237 shares of Class A Common Stock per warrant exercised pursuant to the warrant agreement governing the warrants. ( 2 )Represents securities directly held by CBRE Acquisition Sponsor, LLC ("CBRE Sponsor"). The sole member of CBRE Sponsor is CBRE Services, Inc., which is a wholly-owned subsidiary of CBRE Group, Inc., a publicly traded company. ( 3 )Represents shares of Class A common stock deemed withheld by the issuer in connection with the make-whole exercise on a cashless basis pursuant to the warrant agreement governing the warrants.

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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