The boards of directors of both Essentium and Atlantic Coastal have each unanimously approved the proposed business combination, which is expected to be completed around the end of the first quarter of 2022, subject to, among other things, the approval by Atlantic Coastal’s shareholders of the proposed business combination, the concurrent PIPE transaction, satisfaction of the conditions stated in the definitive agreement and other customary closing conditions, including a registration statement on Form S-4 being declared effective by the U.S. Securities and Exchange Commission (the “SEC”), the receipt of certain regulatory approvals, and approval by Nasdaq to list the securities of the combined company.

Advisors

Jefferies is serving as exclusive financial advisor and capital markets advisor to Essentium and Latham & Watkins LLP is serving as legal advisor to Essentium. Moelis & Company LLC is serving as exclusive financial advisor to Atlantic Coastal, Cantor Fitzgerald & Co. is serving as lead capital markets advisor and private placement agent to Atlantic Coastal, BTIG, LLC and Needham & Company are serving as additional capital markets advisors and private placement agents to Atlantic Coastal, Farvahar Capital is serving as additional capital markets advisor to Atlantic Coastal, and Pillsbury Winthrop Shaw Pitman LLP is serving as legal advisor to Atlantic Coastal.

Webcast Information

An investor webcast with slides regarding the proposed merger can be accessed at 8:00 a.m. ET today, December 1, 2021 by visiting https://www.netroadshow.com/nrs/home/#!/?show=79077d65 or by visiting www.netroadshow.com and entering the deal entry code: Essentium7263 (not case-sensitive). This webcast, along with this press release and the investor presentation are available at www.essentium.com.

About Essentium, Inc.

Essentium, Inc. provides industrial 3D printing solutions that are disrupting traditional manufacturing processes by bringing product strength and production speed together, at scale, with a no-compromise engineering material set. Essentium manufactures and delivers innovative industrial 3D printers, materials, software, and services, enabling the world’s top manufacturers to bridge the gap between 3D printing and machining and embrace the future of advanced manufacturing. Essentium is AS9100D certified and ITAR registered. For more information, visit www.essentium.com.

About Atlantic Coastal Acquisition Corp.

Atlantic Coastal Acquisition Corp. (NASDAQ: ACAH) is a $345 million special purpose acquisition company focusing on the businesses in the mobility sector. For more information, please visit www.atlanticcoastalacquisition.com.

Cautionary Statement Regarding Forward-Looking Statements

This press release contains certain forward-looking statements within the meaning of the federal securities laws with respect to the proposed business combination (the “Proposed Business Combination”) between Essentium and Atlantic Coastal, including statements regarding the benefits of the Proposed Business Combination, the anticipated timing of the Proposed Business Combination, the services offered by Essentium and the markets in which it operates, and Essentium’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 that could cause the actual results to differ materially from the expected results. 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 Atlantic Coastal’s securities, (ii) the risk that the acquisition by Essentium, Inc. of each of Compass AC Holdings, Inc. and Whizz Systems, Inc. may not be completed in a timely manner or at all, (iii) the risk that the Proposed Business Combination may not be completed by Atlantic Coastal’s business combination deadline and the potential failure to obtain an extension of the business combination deadline if sought by Atlantic Coastal, (iv) the failure to satisfy the conditions to the consummation of the Proposed Business Combination, including the receipt of the requisite approvals of Atlantic Coastal’s shareholders and Essentium’s stockholders, respectively, the satisfaction of the minimum trust account amount following redemptions by Atlantic Coastal’s public shareholders and the receipt of certain governmental and regulatory approvals, (v) the lack of a third party valuation in determining whether or not to pursue the Proposed Business Combination, (vi) the occurrence of any event, change or other circumstance that could give rise to the termination of the agreement and plan of merger, (vii) the effect of the announcement or pendency of the Proposed Business Combination on Essentium’s business relationships, performance, and business generally, (viii) risks that the Proposed Business Combination disrupts current plans of Essentium and potential difficulties in Essentium employee retention as a result of the Proposed Business Combination, (ix) the outcome of any legal proceedings that may be instituted against Essentium or against Atlantic Coastal related to the agreement and plan of merger or the Proposed Business Combination, (x) the ability to maintain the listing of Atlantic Coastal’s securities on The Nasdaq Stock Market LLC, (xi) the price of Atlantic Coastal’s securities may be volatile due to a variety of factors, including changes in the competitive and highly regulated industries in which Essentium plans to operate, variations in performance across competitors, changes in laws and regulations affecting Essentium’s business and changes in the combined capital structure, (xii) the ability to implement business plans, forecasts, and other expectations after the completion of the Proposed Business Combination, and identify and realize additional opportunities, (xiii) the impact of the global COVID-19 pandemic, (xiv) the enforceability of Essentium’s intellectual property, including its patents, and the potential infringement on the intellectual property rights of others, cyber security risks or potential breaches of data security, (xv) the ability of Essentium to protect the intellectual property and confidential information of its customers, (xvi) the risk of downturns in the highly competitive additive manufacturing industry, and (xviii) other risks and uncertainties described in Atlantic Coastal’s registration statement on Form S-1 (File No. 333-253003), which was originally filed with the U.S. Securities and Exchange Commission (the “SEC”) on February 11, 2021 (the “Form S-1”), and its subsequent Quarterly Reports on Form 10-Q. The foregoing list of factors is not exhaustive. These forward-looking statements are provided for illustrative purposes only and are not intended to serve as, and must not be relied on by an investors as, a guarantee, an assurance, a prediction or a definitive statement of fact or probability. You should carefully consider the foregoing factors and the other risks and uncertainties described in the “Risk Factors” section of the Form S-1, Quarterly Reports on Form 10-Q, the Registration Statement (as defined below), the proxy statement/prospectus contained therein, and the other documents filed by Atlantic Coastal from time to time with 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. These risks and uncertainties may be amplified by the COVID-19 pandemic, which has caused significant economic uncertainty. 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 Essentium and Atlantic Coastal 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, except as required by securities and other applicable laws. Neither Essentium nor Atlantic Coastal gives any assurance that either Essentium or Atlantic Coastal, respectively, will achieve its expectations.

Additional Information and Where to Find It

In connection with the Potential Business Combination, Atlantic Coastal will file a registration statement on Form S-4 (the “Registration Statement”) with the SEC, which will include a preliminary proxy statement to be distributed to holders of Atlantic Coastal’s ordinary shares in connection with Atlantic Coastal’s solicitation of proxies for the vote by Atlantic Coastal’s shareholders with respect to the Proposed Business Combination and other matters as described in the Registration Statement, as well as the prospectus relating to the offer of securities to be issued to Essentium stockholders in connection with the Proposed Business Combination. After the Registration Statement has been filed and declared effective, Atlantic Coastal will mail a definitive proxy statement, when available, to its shareholders. The Registration Statement will include information regarding the persons who may, under SEC rules, be deemed participants in the solicitation of proxies to Atlantic Coastal’s shareholders in connection with the Potential Business Combination. Atlantic Coastal will also file other documents regarding the Proposed Business Combination with the SEC. Before making any voting decision, investors and security holders of Atlantic Coastal and Essentium are urged to read the Registration Statement, the proxy 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.