Stem SPAC Presentation Deck

stem Disclaimer This presentation was prepared exclusively by Goldman Sachs & Co. LLC ("GS") and Credit Suisse Securities (USA) LLC ("Credit Suisse" and, together with GS, "we" or "us") on a confidential basis and is being delivered to a limited number of accredited investors who have agreed to hold it in confidence. This presentation may not be copied or reproduced, or shown to or reviewed with any person other than the intended recipient and its authorized representatives. Confidential 2 Although the information contained herein is believed to be accurate, GS, Credit Suisse and each of the other parties mentioned herein, including for the avoidance of doubt, Star Peak Energy Transition Corp. ("Star Peak") and Stem, Inc. ("Stem”) (as well as each of their respective directors, officers, shareholders, members, partners and representatives), expressly disclaims liability for, and makes no expressed or implied representation or warranty with respect to, any information contained in or omitted from this presentation, or any other information or communication (whether written or oral) transmitted to any prospective investor. Only those representations and warranties made in a definitive agreement with any person shall have any legal effect. PAST PERFORMANCE IS NO GUARANTEE OF FUTURE PERFORMANCE. The recipient of this presentation acknowledges that it is (a) aware that United States securities laws prohibit any person who has material, non-public information concerning a company from purchasing and selling securities of such company or from communicating such information to any other person under circumstances in which it is reasonably foreseeable that such person may purchase sell such securities and (b) that the recipient will neither use, nor cause any third party to use this investor presentation or any information contained herein in violation of the Securities Exchange Act of 1934, as amended, including, without limitation, Rule 10b-5 thereunder. Use of Projections and Financial Information This presentation contains financial forecasts relating to the anticipated future financial performance of Stem, the proposed acquiror and the combined company. For example, projections of future Operating Free Cash Flow, EBIT, EBITDA, Adjusted EBITDA and EBITDA Margin and other metrics are forward-looking statements. Such financial forecasts constitute forward-looking information, are for illustrative purposes only and should not be relied upon as necessarily being indicative of future results. Actual results may differ materially from the results contemplated by the financial forecasts contained in this presentation, and the inclusion of such information in this presentation should not be regarded as a representation by any person that the results reflected in such forecasts will be achieved. Financial Information This presentation also includes references to financial measures that are calculated and presented on the basis of methodologies other than in accordance with generally accepted accounting principles in the United States of America ("GAAP"). Any non-GAAP financial measures used in this presentation are in addition to, and should not be considered superior to, or a substitute for, financial statements prepared in accordance with GAAP. Non-GAAP financial measures should not be considered in isolation and are subject to significant inherent limitations. The non-GAAP measures presented herein not be comparable to similar non-GAAP measures presented by other companies. Stem believes these non-GAAP measures of financial results provide useful information to management and investors regarding certain financial and business trends relating to Stem's financial condition and results of operations. Stem believes that the use of these non-GAAP financial measures provides an additional tool for investors to use in evaluating ongoing operating results and trends in and in comparing Stem's financial measures with other similar companies, many of which present similar non-GAAP financial measures to investors. These non-GAAP financial measures are subject to inherent limitations as they reflect the exercise of judgments by management about which expense and income are excluded or included in determining these non-GAAP financial measures. The financial information and data contained in this Presentation is either audited in accordance with private company auditing standards or is unaudited and, in each case, does not conform to Regulation S-X or Public Company Accounting Oversight Board ("PCAOB") standards. Accordingly, such information and data may not be included in, may be adjusted in or may be presented differently in any proxy statement/prospectus to be filed with the SEC. Other Disclaimers Neither GS nor Credit Suisse has assumed any responsibility for independent verification of any of the information contained herein and GS and Credit Suisse have relied on such information being complete and accurate in all material respects. Accordingly, no representation or warranty, express or implied, can be made or is made by GS or Credit Suisse as to the accuracy or completeness of any such information. Except where otherwise indicated, this presentation speaks as of the date hereof and is necessarily based upon the information available to GS and Credit Suisse and financial, stock market and other conditions and circumstances existing and disclosed to GS and Credit Suisse as of the date hereof, all of which are subject to change. Neither GS nor Credit Suisse has any obligation to update, bring-down, review or reaffirm this presentation. Under no circumstances should the delivery of this presentation imply that any information or analyses included in this presentation would be the same if made as of any other date. Nothing contained in this presentation is, or shall be relied upon as, a promise or representation as to the past, present or future.

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