Proterra SPAC Presentation Deck

INTRODUCTION Disclaimer (Cont'd) PROTERRA Use of Projections (Cont'd) Neither ArcLight's nor the Company's independent auditors have audited, reviewed, compiled or performed any procedures with respect to the projections for the purpose of their inclusion in this Presentation, and accordingly, neither of them expressed an opinion or provided any other form of assurance with respect thereto for the purpose of this Presentation. In preparing and making certain forward-looking statements contained in this presentation, Proterra and ArcLight made a number of economic, market and operational assumptions. Notably, statements regarding the Company's 2025 vision, and summary financial forecast are, without limitation, subject to material assumptions regarding the Company's ability to economically manufacture and distribute its products at scale and meet its customers' business needs, the Company's ability to successfully execute its growth strategy, the Company's ability to maintain required strategic supply arrangements, rates of adoption of battery electric vehicles by customers in the markets in which the Company operates, and continuation of favorable regulations and government incentives affecting the markets in which the Company operates. The Company cautions that its assumptions may not materialize and that current economic conditions render such assumptions, although believed reasonable at the time they were made, subject to greater uncertainty. Additional Information In connection with the proposed Business Combination, ArcLight intends to file with the SEC a registration statement on Form S-4 containing a preliminary proxy statement/prospectus of ArcLight, and after the registration statement is declared effective, ArcLight will mail a definitive proxy statement/prospectus relating to the proposed Business Combination to its shareholders. This Presentation does not contain all the information that should be considered concerning the proposed Business Combination and is not intended to form the basis of any investment decision or any other decision in respect of the Business Combination. ArcLight's shareholders and other interested persons are advised to read, when available, the preliminary proxy statement/prospectus and the amendments thereto and the definitive proxy statement/prospectus and other documents filed in connection with the proposed Business Combination, as these materials will contain important information about the Company, ArcLight and the Business Combination. When available, the definitive proxy statement/prospectus and other relevant materials for the proposed Business Combination will be mailed to shareholders of ArcLight as of a record date to be established for voting on the proposed Business Combination. Shareholders will also be able to obtain copies of the preliminary proxy statement/prospectus, the definitive proxy statement/prospectus and other documents filed with the SEC, without charge, once available, at the SEC's website at www.sec.gov, or by directing a request to: ArcLight Clean Transition Corp., 200 Clarendon Street, 55th Floor, Boston, MA 02116. Financial Information The financial information and data contained in this Presentation is unaudited and does not conform to Regulation S-X promulgated under the Securities Act of 1933, as amended (the "Securities Act"). Accordingly, such information and data may not be included in, may be adjusted in or may be presented differently in, the registration statement to be filed by ArcLight and Proterra with the SEC. Participants in the Solicitation ArcLight, the Company and their respective directors and executive officers may be deemed participants in the solicitation of proxies from ArcLight's shareholders with respect to the proposed Business Combination. A list of the names of ArcLight's directors and executive officers and a description of their interests in ArcLight is contained in ArcLight's final prospectus relating to its initial public offering, dated September 22, 2020, which was filed with the SEC and is available free of charge at the SEC's web site at www.sec.gov, or by directing a request to ArcLight Clean Transition Corp., 200 Clarendon Street, 55th Floor, Boston, MA 02116. Additional information regarding the interests of the participants in the solicitation of proxies from ArcLight's shareholders with respect to the proposed Business Combination will be contained in the proxy statement/prospectus for the proposed Business Combination when available. No Offer or Solicitation This Presentation shall not constitute a "solicitation" as defined in Section 14 of the Securities Exchange Act of 1934, as amended. This Presentation does not constitute an offer, or a solicitation of an offer, to buy or sell any securities, investment or other specific product, or a solicitation of any vote or approval, nor shall there be any sale of securities, investment or other specific product in any jurisdiction in which such offer, solicitation or sale would be unlawful prior to registration or qualification under the securities laws of any such jurisdiction. Any offering of securities (the "Securities") will not be registered under the Securities Act, and will be offered as a private placement to a limited number of "qualified institutional buyers" (as defined in Rule 144A under the Securities Act) or institutional "accredited investors" (within the meaning of Rule 501(a) under the Securities Act) and "Institutional Accounts" as defined in FINRA Rule 4512(c). Accordingly, the Securities must continue to be held unless a subsequent disposition is exempt from the registration requirements of the Securities Act. Investors should consult with their counsel as to the applicable requirements for a purchaser to avail itself of any exemption under the Securities Act. The transfer of the Securities may also be subject to conditions set forth in an agreement under which they are to be issued. Investors should be aware that they might be required to bear the final risk of their investment for an indefinite period of time. Neither the Company nor ArcLight is making an offer of the Securities in any state where the offer is not permitted. NEITHER THE SEC NOR ANY STATE SECURITIES COMMISSION HAS APPROVED OR DISAPPROVED OF THE SECURITIES OR DETERMINED IF THIS PRESENTATION IS TRUTHFUL OR COMPLETE. Trademarks and Trade Names Proterra and ArcLight own or have rights to various trademarks, service marks and trade names that they use in connection with the operation of their respective businesses. This Presentation also contains trademarks, service marks and trade names of third parties, which are the property of their respective owners. The use or display of third parties' trademarks, service marks, trade names or products in this Presentation is not intended to, and does not imply, a relationship with the Company or ArcLight, or an endorsement or sponsorship by or of the Company or ArcLight. Solely for convenience, the trademarks, service marks and trade names referred to in this Presentation may appear with the Ⓡ, TM or SM symbols, but such references are not intended to indicate, in any way, that the Company or ArcLight will not assert, to the fullest extent under applicable law, their rights or the right of the applicable licensor to these trademarks, service marks and trade names. Summary of Contracts Insofar as this Presentation contains summaries of existing agreements and documents, such summaries are qualified in their entirety by reference to the agreements and documents being summarized. No Obligation This Presentation does not create any obligation on the part of either the Company, ArcLight or the recipient to enter into any further agreement or arrangement. Unless and until a definitive agreement has been fully executed and delivered, no contract or agreement providing for a transaction will be deemed to exist and none of the Company, ArcLight or the recipient will be under any legal obligation of any kind whatsoever. Accordingly, this Presentation is not intended to create for any party a right of specific performance or a right to seek any payment or damages for failure, for any reason, to complete the proposed transaction contemplated herein. 3 January 2021