Statement of Changes in Beneficial Ownership (4)

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 OF SECURITIES	OMB APPROVAL OMB Number: 3235-0287 Estimated average burden hours per response... 0.5
	Filed pursuant to Section 16(a) of the Securities Exchange Act of 1934 or Section 30(h) of the Investment Company Act of 1940

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/YYYY) 3/31/2023
(Street) DALLAS, TX 75201	4. If Amendment, Date Original Filed (MM/DD/YYYY)	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)	Rule 10b5-1(c) Transaction Indication ☐ Check this box to indicate that a transaction was made pursuant to a contract, instruction or written plan that is intended to satisfy the affirmative defense conditions of Rule 10b5-1(c). See Instruction 10.

Table I - Non-Derivative Securities Acquired, Disposed of, or Beneficially Owned
1.Title of Security (Instr. 3)	2. Trans. Date	2A. Deemed Execution Date, if any	3. Trans. 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	3/31/2023		M(2)		1811	A	(1)(2)	24556012	I	Held through CBRE Acquisition Sponsor, LLC (3)

Table II - Derivative Securities Beneficially Owned (e.g., puts, calls, warrants, options, convertible securities)
1. Title of Derivate Security (Instr. 3)	2. Conversion or Exercise Price of Derivative Security	3. Trans. Date	3A. Deemed Execution Date, if any	4. Trans. 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		7. Title and Amount of Securities Underlying Derivative Security (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
Class B Common Stock	(1)	3/31/2023		M (2)			181125	(1)	(1)	Class A Common Stock	1811 (2)	$0.00	905625	I	Held through CBRE Acquisition Sponsor, LLC (3)

Explanation of Responses:
(1)	Pursuant to the terms of the Class B common stock of the Issuer (the "Class B Common Stock"), of which an aggregate of 1,006,250 shares are currently outstanding, on the last day of each measurement period, which will occur annually over seven fiscal years following the completion of the business combination of CBRE Acquisition Holdings, Inc. with Altus Power, Inc., which occurred on December 9, 2021, an aggregate of 201,250 shares of Class B Common Stock will automatically convert, subject to adjustment, into shares of Class A Common Stock of the Issuer (the "Class A Common Stock"), pursuant to a formula based on the stock price of the Class A Common Stock, into an aggregate minimum of 2,013 shares of Class A Common Stock on each conversion date, up to an aggregate maximum of 14,596,637 shares of Class A Common Stock over such seven year period.
(2)	On the last day of the measurement period ending on March 31, 2023 and pursuant to the formula referenced above, an aggregate of 201,250 shares of Class B Common Stock automatically converted into an aggregate of 2,013 shares of Class A Common Stock. Such conversion of Class B Common Stock applies to each holder of Class B Common Stock on a pro rata basis on the basis of the amounts of such Class B Common Stock held by such holder. In connection with the above, 181,125 shares of Class B Common Stock beneficially owned by the Reporting Persons were converted into 1,811 shares of Class A Common Stock.
(3)	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.

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, TX 75201	X	X
CBRE SERVICES, INC. C/O CBRE GROUP, INC. 2100 MCKINNEY AVENUE SUITE 1250 DALLAS, TX 75201	X	X
CBRE GROUP, INC. 2100 MCKINNEY AVENUE SUITE 1250 DALLAS, TX 75201	X	X

Signatures
CBRE ACQUISITION SPONSOR, LLC, By: /s/ Emma E. Giamartino, Name: Emma E. Giamartino, Title: Chief Financial Officer		4/3/2023
**Signature of Reporting Person		Date
CBRE SERVICES, INC., By: /s/ Emma E. Giamartino, Name: Emma E. Giamartino, Title: Chief Financial Officer		4/3/2023
**Signature of Reporting Person		Date
CBRE GROUP, INC., By: /s/ Emma E. Giamartino, Name: Emma E. Giamartino, Title: Chief Financial Officer		4/3/2023
**Signature of Reporting Person		Date

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).
Note:	File three copies of this Form, one of which must be manually signed. If space is insufficient, see Instruction 6 for procedure.
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