Immunome Announces Proposed Public Offering of Common Stock

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BOTHELL, Wash.--(BUSINESS WIRE)--Dec 15, 2025--

Immunome, Inc. (“Immunome”) (Nasdaq: IMNM), a biotechnology company focused on developing first-in-class and best-in-class targeted cancer therapies, today announced its plans to commence an underwritten public offering, subject to market and other conditions, to issue and sell $400 million of shares of its common stock. All of the shares are being offered by Immunome. In connection with the proposed offering, Immunome expects to grant the underwriters a 30-day option to purchase up to an additional $60 million of shares of its common stock. There can be no assurance as to whether or when the proposed offering may be completed or as to the actual size or terms of the proposed offering.

Leerink Partners, J.P. Morgan, TD Cowen, Goldman Sachs & Co. LLC and Guggenheim Securities are acting as joint bookrunning managers for the proposed offering. Wedbush PacGrow and LifeSci Capital are acting as co-lead managers for the proposed offering.

The proposed offering is being made pursuant to a shelf registration statement on Form S-3 that was filed with the U.S. Securities and Exchange Commission (the “SEC”) on February 13, 2024 and automatically became effective upon filing. A preliminary prospectus supplement and accompanying prospectus relating to the proposed offering will be filed with the SEC and will be available for free on the SEC’s website located at http://www.sec.gov. Copies of the preliminary prospectus supplement and the accompanying prospectus relating to the proposed offering may be obtained, when available, from: Leerink Partners LLC, Attention: Syndicate Department, 53 State Street, 40th Floor, Boston, MA 02109, or by telephone at (800) 808-7525 ext. 6105, or by email at [email protected]; J.P. Morgan Securities LLC, Attention: Broadridge Financial Solutions, 1155 Long Island Avenue, Edgewood, NY 11717, or by email at [email protected] and [email protected]; TD Securities (USA) LLC, c/o Broadridge Financial Solutions, 1155 Long Island Avenue, Edgewood, NY 11717, or by email at [email protected]; Goldman Sachs & Co. LLC, Attention: Prospectus Department, 200 West Street, New York, NY 10282, or by telephone at (866) 471-2526, or by email at [email protected]; or Guggenheim Securities, LLC, Attention: Equity Syndicate Department, 330 Madison Avenue, New York, NY 10017, or by telephone at (212) 518-9544, or by email at [email protected].

This press release shall not constitute an offer to sell or a solicitation of an offer to buy, 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.

About Immunome, Inc.

Immunome is a clinical-stage targeted oncology company committed to developing first-in-class and best-in-class targeted cancer therapies. We are advancing an innovative portfolio of therapeutics, drawing on leadership that previously played key roles in the design, development, and commercialization of cutting-edge therapies, including antibody-drug conjugate therapies. Our pipeline includes varegacestat, a late-clinical stage GSI; IM-1021, a clinical-stage ROR1 ADC; and IM-3050, a FAP-targeted radiotherapy that recently received IND clearance. We are also advancing a broad portfolio of early stage ADCs pursuing undisclosed solid tumor targets.

Forward-Looking Statements

Statements contained in this press release regarding Immunome’s expectations regarding the offering are “forward-looking statements” within the meaning of the Private Securities Litigation Reform Act of 1995. Such forward-looking statements include statements regarding, among other things, Immunome’s expectations regarding the completion, timing and size of the proposed offering, are based upon Immunome’s current expectations and involve assumptions that may never materialize or may prove to be incorrect. Actual results could differ materially from those anticipated in such forward-looking statements as a result of various risks and uncertainties, which include, without limitation, market conditions, size and expected gross proceeds of the offering, the satisfaction of customary closing conditions related to the proposed offering, Immunome’s ability to complete the proposed offering, and the risks and uncertainties inherent in Immunome’s business. These and other risks and uncertainties are described in greater detail in the section entitled “Risk Factors” in Immunome’s most recent annual report on Form 10-K and quarterly report on Form 10-Q filed with the SEC, as well as discussions of potential risks, uncertainties, and other important factors in Immunome’s other filings with the SEC, including those contained or incorporated by reference in the preliminary prospectus supplement and accompanying prospectus related to the offering to be filed with the SEC. All forward-looking statements contained in this press release speak only as of the date on which they were made and are based on management’s assumptions and estimates as of such date. Immunome undertakes no obligation to update such statements to reflect events that occur or circumstances that exist after the date on which they were made, except as required by law.

View source version on businesswire.com:https://www.businesswire.com/news/home/20251215295131/en/

CONTACT: Investor Contact:Max Rosett

Chief Financial Officer

[email protected] Contact:Nicole Foderaro

Real Chemistry

[email protected]

KEYWORD: WASHINGTON UNITED STATES NORTH AMERICA

INDUSTRY KEYWORD: BIOTECHNOLOGY PHARMACEUTICAL HEALTH ONCOLOGY

SOURCE: Immunome, Inc.

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PUB: 12/15/2025 04:01 PM/DISC: 12/15/2025 04:02 PM

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