Dianthus Therapeutics, Inc. Announces Proposed $150 Million Underwritten Public Offering

NEW YORK and WALTHAM, Mass., Sept. 08, 2025 (GLOBE NEWSWIRE) -- Dianthus Therapeutics, Inc. (Nasdaq: DNTH), a clinical-stage biotechnology company dedicated to advancing the next generation of antibody complement therapeutics to treat severe autoimmune diseases (“Dianthus” or the “Company”), today announced that it has commenced an underwritten public offering of $150 million of its shares of its common stock or, in lieu of common stock to certain investors that so choose, pre-funded warrants to purchase shares of its common stock. In addition, Dianthus expects to grant the underwriters a 30-day option to purchase up to an additional $22.5 million of its shares of common stock at the public offering price, less underwriting discounts and commissions. The proposed public offering is subject to market and other conditions, and there can be no assurance as to whether or when the offering may be completed or as to the actual size or terms of the offering. All of the securities are being offered by Dianthus.

Dianthus intends to use the net proceeds from this offering to advance the Company’s preclinical and clinical development activities, as well as for working capital and general corporate purposes.

Jefferies, TD Cowen, Evercore ISI and Stifel are acting as joint book-running managers for the proposed offering.

A shelf registration statement relating to these securities was filed with the Securities and Exchange Commission (“SEC”) and became effective on October 9, 2024. This offering will be made only by means of a written prospectus, including a prospectus supplement, forming a part of an effective registration statement. A copy of the preliminary prospectus supplement and the accompanying prospectus relating to the offering may be obtained, when available, from: Jefferies LLC, Attention: Equity Syndicate Prospectus Department, 520 Madison Avenue, New York, NY 10022, by telephone at [phone], or by email at [e-mail]; TD Securities (USA) LLC, 1 Vanderbilt Avenue, New York, NY 10017, by telephone at [phone], or by email at [e-mail]; Evercore Group L.L.C., Attention: Equity Capital Markets, 55 East 52nd Street, 35th Floor, New York, NY 10055, by telephone at [phone], or by email at [e-mail]; or Stifel, Nicolaus & Company, Incorporated, Attention: Syndicate, One Montgomery Street, Suite 3700, San Francisco, CA 94104, by telephone at [phone], or by email at [e-mail].