Immunome Reports Second Quarter 2025 Financial Results and Provides Business Update

8/6/2025

BOTHELL, Wash. – Immunome, Inc. (Nasdaq: IMNM), a biotechnology company focused on developing first-in-class and best-in-class targeted cancer therapies, today announced financial results for the quarter ended June 30, 2025 and provided a business update.

“Immunome made substantial progress in the second quarter of 2025, underscored by the continued advancement of our clinical programs towards key milestones,” said Clay B. Siegall, Ph.D., President and Chief Executive Officer of Immunome. “We look forward to sharing topline data for the RINGSIDE trial of varegacestat before the end of this year, and we are well-positioned to support a new drug application submission for that program as appropriate.”

“We recently dosed the third cohort of patients in the dose escalation study of IM-1021, our ROR1 ADC. We are excited by the profile of HC74, the proprietary TOP1 inhibitor payload contained in IM-1021, and are making progress towards IND submission for three additional ADCs utilizing that technology.”

Pipeline Highlights

Varegacestat:

IM-1021: The Phase 1 clinical trial of IM-1021 is ongoing, with patients recently dosed at the third dose level. The trial is an open-label, multicenter dose-escalation and expansion study that is expected to include participants with advanced B-cell lymphomas and advanced solid tumors.

IM-3050: Immunome received IND clearance for IM-3050 in April 2025 and expects to initiate a Phase 1 clinical trial before the end of 2025.

Preclinical Pipeline: Immunome’s three preclinical ADCs against solid tumor targets, IM-1617, IM-1340 and IM-1335, each of which incorporates HC74, are currently undergoing IND-enabling work. Additional undisclosed ADCs are in discovery and lead optimization.

Second Quarter 2025 Financial Results

About Immunome, Inc.

Immunome is a clinical-stage targeted oncology company committed to developing first-in-class and best-in-class targeted therapies designed to improve outcomes for cancer patients. 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 targeted cancer therapies, including antibody-drug conjugate therapies (ADCs). Our most advanced pipeline programs are varegacestat (formerly AL102), a gamma secretase inhibitor which is currently in a Phase 3 trial for treatment of desmoid tumors; IM-1021, a ROR1-targeted ADC which is currently in a Phase 1 trial; and IM-3050, a FAP-targeted radioligand, which recently received IND clearance. Our pipeline also includes IM-1617, IM-1335, and IM-1340, all of which are preclinical ADCs pursuing undisclosed targets with expression in multiple solid tumors. For more information, visit www.immunome.com.

Cautionary Statement Regarding Forward-Looking Statements

Statements in this press release that are not purely historical in nature are “forward-looking statements” within the meaning of the Private Securities Litigation Reform Act of 1995. We use words such as “focused,” “on track,” “optimistic,” “will,” “potential,” “expect,” and similar expressions to identify these forward-looking statements. These forward-looking statements include progress of Immunome’s clinical programs to key milestones; Immunome’s expected timing for providing topline data for the Phase 3 RINGSIDE Part B trial and that it is well positioned to support a new drug application submission; Immunome’s progress towards submitting INDs for three additional ADCs; the expected tumor and cancer types of patients in Immunome’s Phase 3 RINGSIDE Part B trial; the expected timing for initiating a Phase 1 clinical trial for IM-3050; Immunome’s expected cash runway; the potential of Immunome’s ADC programs to provide first-in-class or best-in-class status; and other statements regarding management’s intentions, plans, beliefs, expectations or forecasts for the future. These forward-looking statements are based on Immunome’s current expectations and involve assumptions that may never materialize or may prove to be incorrect; consequently, actual results may differ materially from those expressed or implied in the statements due to a number of factors, including the risk that Immunome will not be able to realize the benefits of its strategic transactions; the risk that regulatory approvals for Immunome’s programs and product candidates are not obtained, are delayed or are subject to unanticipated conditions; the risk that pre-clinical data may not be predictive of clinical data; the risk that Immunome’s programs and product candidates fail to achieve their intended endpoints; uncertainties related to Immunome’s capital requirements and Immunome’s expected cash runway; Immunome’s ability to grow and advance its pipeline and successfully execute on its business plan; and other risks and uncertainties included under the caption “Risk Factors” in Immunome’s Quarterly Report on

Form 10-Q for the quarter ended March 31, 2025, filed with the Securities and Exchange Commission (“SEC”) on May 12, 2025 and in Immunome’s Quarterly Report on Form 10-Q for the quarter ended June 30, 2025, to be filed with the SEC later today. These documents can also be accessed on Immunome’s website at www.immunome.com by clicking on the link “Financials” under the “Investors” tab. The forward-looking statements included in this press release are made only as of the date hereof. Except as required by law, Immunome assumes no obligation and does not intend to update any forward-looking statements included in this press release.

Investor Contact:

Max Rosett

Chief Financial Officer

investors@immunome.com

IMMUNOME, INC.

Condensed Consolidated Balance Sheets

(Unaudited; in thousands)

IMMUNOME, INC.

Condensed Consolidated Statement of Operations and Comprehensive Loss

(Unaudited; in thousands, except share and per share amounts)