Manufacturing. Accelerated.

Disclaimer This presentation (this “Presentation") is provided for informational purposes only and has been prepared to assist interested parties in making their own evaluation with respect to a potential business combination between Desktop Metal, Inc. ("Desktop Metal") and Trine Acquisition Corp. ("Trine") and related transactions (the "Proposed Business Combination") and for no other purpose. No representations or warranties, express or implied are given in, or respect of, this Presentation. To the fullest extent permitted by law, in no circumstances will Desktop Metal, Trine, or any of their respective subsidiaries, stockholders, affiliates, representatives, partners, directors, officers, employees, advisers or agents be responsible or liable for any direct, indirect or consequential loss or loss of profit arising from use of this Presentation, its contents, its omissions, reliance on the information contained within it, or on opinions communicated in relation thereto or otherwise arising in connection therewith. This Presentation does not purport to be all-inclusive or to contain all of the information that may be required to make a full analysis of Desktop Metal or the Proposed Business Combination. Viewers of this Presentation should each make their own evaluation of Desktop Metal and of the relevance and adequacy of the information and should make such other investigations as they deem necessary. Forward-Looking Statements This document contains certain forward-looking statements within the meaning of the federal securities laws with respect to the Proposed Business Combination, including statements regarding the benefits of the Proposed Business Combination, the anticipated timing of the Proposed Business Combination, the services offered by Desktop Metal and the markets in which it operates, and Desktop Metal's projected future results. These forward-looking statements generally are identified by the words "believe," "project," "expect," "anticipate,” “estimate,” “intend," "strategy," "future," "opportunity," "plan," "may," "should," "will," "would," "will be," "will continue," "will likely result," and similar expressions. Forward-looking statements are predictions, projections and other statements about future events that are based on current expectations and assumptions and, as a result, are subject to risks and uncertainties. Many factors could cause actual future events to differ materially from the forward-looking statements in this document, including but not limited to: (i) the risk that the Proposed Business Combination may not be completed in a timely manner or at all, which may adversely affect the price of Trine's securities, (ii) the risk that the Proposed Business Combination may not be completed by Trine's business combination deadline and the potential failure to obtain an extension of the business combination deadline if sought by Trine, (iii) the failure to satisfy the conditions to the consummation of the Proposed Business Combination, including the receipt of the requisite approvals of Trine's and Desktop Metal's stockholders, the satisfaction of the minimum trust account amount following redemptions by Trine's public shareholders and the receipt of certain governmental and regulatory approvals, (iv) the lack of a third party valuation in determining whether or not to pursue the Proposed Business Combination, (v) the occurrence of any event, change or other circumstance that could give rise to the termination of the agreement and plan of merger, (vi) the effect of the announcement or pendency of the Proposed Business Combination on Desktop Metal's business relationships, performance, and business generally, (vii) risks that the Proposed Business Combination disrupts current plans of Desktop Metal and potential difficulties in Desktop Metal employee retention as a result of the Proposed Business Combination, (viii) the outcome of any legal proceedings that may be instituted against Desktop Metal or against Trine related to the agreement and plan of merger or the Proposed Business Combination, (ix) the ability to maintain the listing of Trine's securities on the New York Stock Exchange, (x) the price of Trine's securities may be volatile due to a variety of factors, including changes in the competitive and highly regulated industries in which Desktop Metal plans to operate, variations in performance across competitors, changes in laws and regulations affecting Desktop Metal's business and changes in the combined capital structure, (xi) the ability to implement business plans, forecasts, and other expectations after the completion of the Proposed Business Combination, and identify and realize additional opportunities, and (xii) the risk of downturns in the highly competitive additive manufacturing industry. The foregoing list of factors is not exhaustive. You should carefully consider the foregoing factors and the other risks and uncertainties described in the "Risk Factors" section of Trine's Annual Reports on Form 10-K, Quarterly Reports on Form 10-Q, the Registration Statement (as defined below), the proxy statement/consent solicitation statement/prospectus contained. therein, and the other documents filed by Trine from time to time with the U.S. Securities and Exchange Commission (the "SEC"). These filings identify and address other important risks and uncertainties that could cause actual events and results to differ materially from those contained in the forward-looking statements. Forward-looking statements speak only as of the date they are made. Readers are cautioned not to put undue reliance on forward-looking statements, and Desktop Metal and Trine assume no obligation and do not intend to update or revise these forward-looking statements, whether as a result of new information, future events, or otherwise. Neither Desktop Metal nor Trine gives any assurance that either Desktop Metal or Trine, respectively, will achieve its expectations. Additional Information and Where to Find It This document relates to the Proposed Business Combination between Desktop Metal and Trine. Trine intends to file a registration statement on Form S-4 relating to the Proposed Business Combination (the "Registration Statement"), which will include a proxy statement/prospectus of Trine and a consent solicitation statement of Desktop Metal. The proxy statement/consent solicitation statement/prospectus will be sent to all Trine and Desktop Metal stockholders. Trine will also file other documents regarding the Proposed Business Combination with the SEC. Before making any voting decision, investors and security holders of Trine and Desktop Metal are urged to read the Registration Statement, the proxy statement/consent solicitation statement/ prospectus contained therein, and all other relevant documents filed or that will be filed with the SEC in connection with the Proposed Business Combination as they become available because they will contain important information about the Proposed Business Combination. Investors and security holders will be able to obtain free copies of the proxy statement/consent solicitation statement/prospectus and all other relevant documents filed or that will be filed with the SEC by Trine through the website maintained by the SEC at www.sec.gov. In addition, the documents filed by Trine may be obtained free of charge from Trine's website at www.trineacquisitioncorp.com or by written request to Trine at Trine Acquisition Corp., 405 Lexington Avenue, 48th Floor, New York, NY 10174. D Desktop Metal 2