On October 7, 2025 Adicet Bio, Inc. ("Adicet") (Nasdaq: ACET), a clinical stage biotechnology company discovering and developing allogeneic gamma delta T cell therapies for autoimmune diseases and cancer, reported the pricing of an underwritten registered direct offering of 70,001,000 shares of its common stock and, in lieu of common stock to certain investors, pre-funded warrants to purchase 10,000,000 shares of common stock (Press release, Adicet Bio, OCT 7, 2025, View Source [SID1234656497]). The shares of common stock are being sold at a price of $1.00 per share, and the pre-funded warrants are being sold at a price of $0.9999 per pre-funded warrant, which represents the per share price of the common stock less the $0.0001 per share exercise price for each pre-funded warrant. The gross proceeds from the offering, before deducting underwriting discounts and commissions and offering expenses, are expected to be approximately $80.0 million. All of the securities in the offering are to be sold by Adicet. The offering is expected to close on or about October 8, 2025, subject to customary closing conditions.

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Jefferies and Guggenheim Securities are acting as joint book-running managers for the offering. Truist Securities is also acting as a joint bookrunner. Wedbush PacGrow and H.C. Wainwright & Co. are acting as lead managers for the offering.

The securities described above are being offered by Adicet pursuant to a shelf registration statement on Form S-3 (File No. 333-285609) that was previously filed with, and subsequently declared effective on March 14, 2025 by, the U.S. Securities and Exchange Commission ("SEC"). A prospectus supplement relating to and describing the terms of the offering will be filed with the SEC and will be available on the SEC’s website at www.sec.gov. When available, copies of the prospectus supplement and the accompanying prospectus relating to the offered securities may be obtained from: Jefferies LLC, Attention: Equity Syndicate Prospectus Department, 520 Madison Avenue, New York, NY 10022, by telephone at (877) 821-7388, or by email at [email protected] or Guggenheim Securities, LLC, Attention: Equity Syndicate Department, 330 Madison Avenue, 8th Floor, New York, NY 10017, by telephone at (212) 518-9544, or by email at [email protected].

This press release shall not constitute an offer to sell or the solicitation of an offer to buy these securities, nor shall there be any sale of these securities in any state or jurisdiction in which such offer, solicitation or sale would be unlawful prior to registration or qualification under the securities laws of any such state or jurisdiction.