Participants in the Solicitation

Desktop Metal and the Company and their respective directors and executive officers may be deemed to be participants in the solicitation of proxies from the Company’s stockholders in connection with the proposed transaction. Information about the Company’s directors and executive officers and their ownership of the Company’s common stock is set forth in the Company’s proxy statement for its Annual Meeting of Stockholders on Schedule 14A filed with the SEC on April 1, 2021. Information about Desktop Metal’s directors and executive officers is set forth in Desktop Metal’s proxy statement for its Annual Meeting of Stockholders on Schedule 14A filed with the SEC on June 17, 2021. To the extent that holdings of Desktop Metal’s or the Company’s securities have changed since the amounts printed in Desktop Metal’s or the Company’s proxy statement, such changes have been or will be reflected on Statements of Changes in Beneficial Ownership on Form 4 filed with the SEC. Additional information regarding the interests of those persons and other persons who may be deemed participants in the proposed transaction may be obtained by reading the proxy statement/prospectus regarding the proposed transaction when it becomes available. You may obtain free copies of these documents as described in the preceding paragraph.

No Offer or Solicitation

This communication is not intended to and shall not constitute an offer to sell or the solicitation of an offer to sell or the solicitation of an offer to buy any securities or a solicitation of any vote of approval, nor shall there be any sale of securities 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. No offer of securities shall be made except by means of a prospectus meeting the requirements of Section 10 of the Securities Act.

Safe Harbor Regarding Forward Looking Statements

This news release relates to a proposed business combination transaction between Desktop Metal and the Company and may contain forward-looking statements within the meaning of the Private Securities Litigation Reform Act with respect to the Company’s future financial or business performance, strategies, or expectations. Forward-looking statements typically are identified by words or phrases such as “trend,” “potential,” “opportunity,” “pipeline,” “believe,” “comfortable,” “expect,” “anticipate,” “current,” “intention,” “estimate,” “position,” “assume,” “outlook,” “continue,” “remain,” “maintain,” “sustain,” “seek,” “achieve,” as well as similar expressions, or future or conditional verbs such as “will,” “would,” “should,” “could” and “may.”

The Company cautions that forward-looking statements are subject to numerous assumptions, risks and uncertainties, which change over time. Forward-looking statements speak only as of the date they are made and the Company assumes no duty to and does not undertake to update forward-looking statements. Actual results could differ materially from those anticipated in forward-looking statements and future results could differ materially from historical performance.

In addition to risk factors previously disclosed in the Company’s filings with the SEC), including its Annual Report on Form 10-K, the following factors, among others, could cause results to differ materially from forward-looking statements or historical performance: the severity and duration of world health events, including the COVID-19 outbreak and the related economic repercussions and operational challenges; the ability of Desktop Metal and the Company to consummate the proposed transaction in a timely manner or at all, including the ability to secure regulatory approvals; impact to the Company’s business if the transaction is not consummated; successful integration of Desktop Metal’s and the Company’s businesses and realization of synergies and benefits; the ability of Desktop Metal to implement business plans, forecasts and other expectations following the completion of the transaction; risk that actual performance and financial results following completion of the transaction differ from projected performance and results; business disruption following the transaction; the Company’s ability to consistently generate operating profits; fluctuations in the Company’s revenues and operating results; the Company’s competitive environment and its competitive position; ExOne’s ability to enhance its current 3D printing machines and technology and to develop and introduce new 3D printing machines; the Company’s ability to qualify more industrial materials in which it can print; demand for ExOne’s products; the availability of skilled personnel; the impact of loss of key management; the impact of customer specific terms in machine sale agreements in determining the period in which the Company recognizes revenue; risks related to global operations including effects of foreign currency and COVID-19; dependency on certain critical suppliers; nature or impact of alliances and strategic investments; reliance on critical information technology systems; the effect of litigation, contingencies and warranty claims; liabilities under laws and regulations protecting the environment; the impact of governmental laws and regulations; operating hazards, cyberattacks, war, terrorism and cancellation or unavailability of insurance coverage; the impact of disruption of the Company’s manufacturing facilities or ExOne Adoption Centers; the adequacy of ExOne’s protection of its intellectual property; expectations regarding demand for the Company’s industrial products, and other matters with regard to outlook; and other factors beyond our control, including the impact of COVID-19.

These and other important factors, including those discussed under Item 1A, “Risk Factors” and Item 7, “Management’s Discussion and Analysis of Financial Condition and Results of Operations” in the Company’s Annual Report on Form 10-K, and under Part I, Item 2, “Management’s Discussion and Analysis of Financial Condition and Results of Operations” in the Company’s Quarterly Report on Form 10-Q for the quarter ended June 30, 2021, may cause the Company’s actual results of operations to differ materially from any future results of operations expressed or implied by the forward-looking statements contained therein. Before making a decision to purchase ExOne common stock, you should carefully consider all of the factors identified in its Annual Report on Form 10-K and Quarterly Report on Form 10-Q that could cause actual results to differ from these forward-looking statements.

A more fulsome discussion of the risks related to the proposed transaction will be included in the proxy statement/prospectus. For additional information about other risks and uncertainties that could cause actual results of the transaction to differ materially from those described in the forward-looking statements in this communication of the Company’s business, financial condition, results of operations and prospects generally, please refer to the Company’s reports filed with the SEC, including without limitation the “Risk Factors” and/or other information included in the Form 8-K to be filed by the Company in connection with the transaction, the Form 10-Q filed with the SEC on August 11, 2021 and such other reports as the Company has filed or may file with the SEC from time to time. For additional information about risks and uncertainties that may cause actual results of the transaction to differ materially from those described, please refer to Desktop Metal’s reports filed with the SEC, including without limitation the “Risk Factors” and/or other information included in such reports. While the list of factors presented here is, and the list of factors presented in the proxy statement/prospectus will be considered representative, no such list should be considered to be a complete statement of all risks and uncertainties. Unlisted factors may present significant additional obstacles to the realization of forward-looking statements. Except as required by applicable law, neither Desktop Metal nor the Company will update any forward-looking statements to reflect new information, future events, changed circumstances or otherwise.

FINANCIAL TABLES FOLLOW.