Filed by CBRE Acquisition Holdings, Inc.

Pursuant to Rule 425 under the Securities Act of 1933

and deemed filed pursuant to Rule 14a-12

of the Securities Exchange Act of 1934

Subject Company: CBRE Acquisition Holdings, Inc.

Commission File No. 001-39798

Altus Power + CBRE Acquisition Holdings New Marlborough 2.0 MWh Storage System Oahu 6.2 MW Ground Mount System Boston 4.0 MW Roof Mount System North Hanover 10.0 MW Ground Mount System Altus Power EV Charging Infrastructure

Transaction combines Altus Power, one of the largest renewable energy generation companies focused on the C&I, public sector and community solar segments, with CBAH, a special purpose acquisition company sponsored by CBRE Group, the world’s largest commercial real estate services firm Founded in 2009, Altus Power operates 265 megawatts of solar power generation assets across 16 US states, from Vermont to Hawaii; current investor group includes Blackstone Altus Power is a developer, owner and operator of large-scale roof, ground and carport-based photovoltaic and energy storage systems, as well as electric vehicle charging facilities, serving commercial and industrial, public sector and community solar customers Altus Power and CBRE, Inc. entered into a commercial collaboration agreement pursuant to which, among other things, CBRE will promote Altus Power as its preferred clean energy partner across the 7 million square feet of real estate it manages, and with CBRE’s client base Transaction is expected to provide gross proceeds of approximately $678 million to Altus Power, and values Altus Power at $1.58 billion pro-forma for the transaction1 Transaction is expected to close in Q4 2021 To Combine With CBRE’s existing footprint provides opportunities throughout the country 1) The pro forma implied equity value of the combined company assumes the issuance of 90,000,000 shares of CBAH Class A common stock at a value of $10 per share price at the closing, which assumes the issuance of 27,500,000 shares of CBAH Class A common stock in connection with the PIPE Investment and no redemptions by CBAH’s public stockholders

In connection with the proposed business combination (the “Business Combination”), CBRE Acquisition Holdings, Inc. (“CBAH”) has filed with the U.S. Securities and Exchange Commission (the “SEC”) a Registration Statement on Form S-4 (the “Registration Statement”), which includes a preliminary proxy statement/prospectus in connection with the Business Combination and will mail a definitive proxy statement/prospectus and other relevant documents to its stockholders. CBAH’s stockholders and other interested persons are advised to read, when available, the preliminary proxy statement/prospectus, and amendments thereto, and the definitive proxy statement/prospectus in connection with CBAH’s solicitation of proxies for its stockholders’ meeting to be held to approve the Business Combination because the proxy statement/prospectus will contain important information about CBAH, Altus Power, Inc. (“Altus Power”) and the Business Combination. The definitive proxy statement/prospectus will be mailed to stockholders of CBAH as of a record date to be established for voting on the Business Combination. Stockholders will also be able to obtain copies of the Registration Statement and the proxy statement/prospectus, without charge, once available, at the SEC’s website at www.sec.gov or by directing a request to CBRE Acquisition Holdings, Inc., 2100 McKinney Avenue, Suite 1250, Dallas, TX 75201.   CBAH, Altus Power and certain of their respective directors and officers may be deemed participants in the solicitation of proxies of CBAH’s stockholders with respect to the approval of the Business Combination. CBAH and Altus Power urge investors, stockholders and other interested persons to read the Registration Statement including the preliminary proxy statement/prospectus and amendments thereto and the definitive proxy statement/prospectus and exhibits thereto, as well as other documents filed with the SEC in connection with the Business Combination, as these materials will contain important information about Altus Power, CBAH and the Business Combination. Information regarding CBAH’s directors and officers and a description of their interests in CBAH is contained in the Registration Statement.   This communication may contain “forward-looking statements” within the meaning of the “safe harbor” provisions of the Private Securities Litigation Reform Act of 1995. Forward-looking statements may be identified by the use of words such as “could”, “expect”, “may”, “plan”, “future” and “project” and other similar expressions that predict or indicate future events or trends or that are not statements of historical matters. These statements, which involve risks and uncertainties, relate to analyses and other information that are based on forecasts of future results and estimates of amounts not yet determinable and may also relate to CBAH’s and Altus Power’s future prospects, developments and business strategies. In particular, such forward-looking statements include statements concerning the timing of the Business Combination, the business plans, objectives, expectations and intentions of CBAH once the Business Combination and the other transactions contemplated thereby (the “Transactions”) and change of name are complete (“New Altus”), and Altus Power’s estimated and future results of operations, business strategies, competitive position, industry environment and potential growth opportunities. These statements are based on CBAH’s or Altus Power’s management’s current expectations and beliefs, as well as a number of assumptions concerning future events. Such forward-looking statements are subject to known and unknown risks, uncertainties, assumptions and other important factors, many of which are outside CBAH’s or Altus Power’s control, that could cause actual results to differ materially from the results discussed in the forward-looking statements. These risks, uncertainties, assumptions and other important factors include, but are not limited to: (1) the occurrence of any event, change or other circumstances that could give rise to the termination of the business combination agreement related to the Transactions (the “Business Combination Agreement”); (2) the inability to complete the Transactions due to the failure to obtain approval of the stockholders of CBAH or Altus Power or other conditions to closing in the Business Combination Agreement; (3) the ability of New Altus to meet NYSE’s listing standards (or the standards of any other securities exchange on which securities of the public entity are listed) following the Business Combination; (4) the inability to complete the private placement of common stock of CBAH to certain institutional accredited investors; (5) the risk that the announcement and consummation of the Transactions disrupts Altus Power’s current plans and operations; (6) the ability to recognize the anticipated benefits of the Transactions, which may be affected by, among other things, competition, the ability of New Altus to grow and manage growth profitably, maintain relationships with customers, business partners, suppliers and agents and retain its management and key employees; (7) costs related to the Transactions; (8) changes in applicable laws or regulations and delays in obtaining, adverse conditions contained in, or the inability to obtain necessary regulatory approvals required to complete the Transactions; (9) the possibility that Altus Power and New Altus may be adversely affected by other economic, business, regulatory and/or competitive factors; (10) the impact of COVID-19 on Altus Power’s and New Altus’s business and/or the ability of the parties to complete the Transactions; (11) the outcome of any legal proceedings that may be instituted against CBAH, Altus Power, New Altus or any of their respective directors or officers, following the announcement of the Transactions; and (12) the failure to realize anticipated pro forma results and underlying assumptions, including with respect to estimated stockholder redemptions and purchase price and other adjustments. Additional factors that could cause actual results to differ materially from those expressed or implied in forward-looking statements can be found in CBAH’s most recent annual report on Form 10-K, subsequently filed quarterly reports on Form 10-Q and current reports on Form 8-K, which are available, free of charge, at the SEC’s website at www.sec.gov, as well as the Registration Statement and CBAH’s definitive proxy statement/prospectus, when available. New risks and uncertainties arise from time to time, and it is impossible for us to predict these events or how they may affect us. You are cautioned not to place undue reliance upon any forward-looking statements, which speak only as of the date made, and CBAH and Altus Power undertake no obligation to update or revise the forward-looking statements, whether as a result of new information, changes in expectations, future events or otherwise. This communication is not intended to be all-inclusive or to contain all the information that a person may desire in considering an investment in CBAH and is not intended to form the basis of an investment decision in CBAH. All subsequent written and oral forward-looking statements concerning CBAH and Altus Power, the Transactions or other matters and attributable to CBAH and Altus Power or any person acting on their behalf are expressly qualified in their entirety by the cautionary statements above. This communication is not a proxy statement or solicitation of a proxy, consent, or authorization with respect to any securities or in respect of the Transactions and shall neither constitute an offer to sell or the solicitation of an offer to buy any securities, nor shall there be any sale of securities in any jurisdiction in which the offer, solicitation or sale would be unlawful prior to the registration or qualification under the securities laws of any such jurisdiction. Disclaimer