Repare Therapeutics to Host Conference Call and Webcast to Discuss Initial Phase 1 MYTHIC Modules 1 and 2 Clinical Data Presented at 35th AACR-NCI-EORTC International Conference on Molecular Targets and Cancer Therapeutics

Conference call and live webcast on Friday, October 13, 2023 at 5:30 p.m. ET

Repare Therapeutics Inc. (“Repare” or the “Company”) (Nasdaq: RPTX), a leading clinical-stage precision oncology company, today announced it will host a conference call and live webcast to share initial data from Module 1 and 2 of its ongoing Phase 1 MYTHIC clinical trial that will be presented in a plenary session at the upcoming AACR-NCI-EORTC conference, being held October 11-15, 2023 in Boston, MA. The data that will be presented at AACR-NCI-EORTC will be based on a later cutoff date than what is included in the abstracts, which are released on Wednesday, October 4, 2023 at 12:00 p.m. ET. Repare’s executive management team will be joined by Dr. Timothy A. Yap, MBBS, PhD, FRCP, Principal Investigator, Professor in the Department of Investigational Cancer Therapies (Phase 1 Program) and Vice President, Head of Clinical Development in the Therapeutics Discovery Division at the University of Texas MD Anderson Cancer Center in Houston, Texas.

Conference Call and Webcast Details:

To access the call, please dial (877) 870-4263 (U.S. and Canada) or (412) 317-0790 (international) at least 10 minutes prior to the start time and ask to be joined to the Repare Therapeutics call. A live video webcast will be available in the Investor section of the Company’s website at https://ir.reparerx.com/news-and-events/events. A webcast replay will also be archived for at least 30 days.

About Repare Therapeutics’ SNIPRx® Platform

Repare’s SNIPRx® platform is a genome-wide CRISPR-based screening approach that utilizes proprietary isogenic cell lines to identify novel and known synthetic lethal gene pairs and the corresponding patients who are most likely to benefit from the Company’s therapies based on the genetic profile of their tumors. Repare’s platform enables the development of precision therapeutics in patients whose tumors contain one or more genomic alterations identified by SNIPRx® screening, in order to selectively target those tumors in patients most likely to achieve clinical benefit from resulting product candidates.

About Repare Therapeutics, Inc.

Repare Therapeutics is a leading clinical-stage precision oncology company enabled by its proprietary synthetic lethality approach to the discovery and development of novel therapeutics. The Company utilizes its genome-wide, CRISPR-enabled SNIPRx® platform to systematically discover and develop highly targeted cancer therapies focused on genomic instability, including DNA damage repair. The Company’s pipeline includes lunresertib (also known as RP-6306), a PKMYT1 inhibitor currently in Phase 1 clinical development; camonsertib (also known as RP-3500 or RG6526), a potential leading ATR inhibitor currently in Phase 1/2 clinical development and partnered with Roche; RP-3467, a preclinical Polθ inhibitor program; as well as several additional, undisclosed preclinical programs, including RP-1664. For more information, please visit reparerx.com.

SNIPRx® is a registered trademark of Repare Therapeutics Inc.

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