Debio-0123

Phase 1 MYTHIC clinical trial of lunresertib in combination with camonsertib demonstrated a significant reduction in Grade 3 anemia and continued trends of patient response and benefit; FDA agrees with RP2D First patient dosed in Phase 1 MYTHIC clinical trial of lunresertib in combination with the WEE1 inhibitor, Debio 0123; first clinical trial inhibiting both PKMYT1 and WEE1 Initiating Phase 2 TRESR expansion in ~20 patients evaluating monotherapy camonsertib in NSCLC; initial data expected in 2025 First patient dosed in Phase 1 LIONS monotherapy trial for PLK4 inhibitor RP-1664 Announced the appointment of Steven H. Stein, M.D. to Repare’s Board of Directors, effective in June 2024 $237.0 million in cash and cash equivalents and marketable securities to advance clinical programs and portfolio to mid-2026 CAMBRIDGE, Mass. & MONTREAL--(BUSINESS WIRE)-- Repare Therapeutics Inc. (“Repare” or the “Company”) (Nasdaq: RPTX), a leading clinical-stage precision oncology company, today reported financial results for the first quarter ended March 31, 2024. “This was a quarter of clinical progress as we await key, near-term data on a rich set of distinctive clinical approaches for our four wholly-owned compounds in 2024,” said Lloyd M. Segal, President and Chief Executive Officer of Repare. “We have agreement with the FDA regarding our recommended Phase 2 dose (RP2D) for our lunresertib plus camonsertib combination, with significantly improved tolerability at the RP2D with our updated dosing schedule. We are seeing continuing trends of patient response and benefit, and we are on track to report the updated dataset in the fourth quarter of 2024. Our objective is to determine the best opportunity for a registrational trial, to start in 2025. Additionally, we are initiating a small clinical trial to rapidly confirm a camonsertib monotherapy signal in non-small cell lung cancer (NSCLC) and expect that readout to be available in 2025. Our clinical portfolio also includes the LIONS trial of our RP-1664 PLK4 inhibitor, the PKMYT1 and WEE1 inhibitor combination in MYTHIC, and the upcoming clinical start of our Polθ inhibitor program, RP-3467, in the second half of 2024.” First Quarter 2024 and Recent Portfolio Highlights: Lunresertib (RP-6306) On track for a potential registrational trial decision in gynecologic expansion cohorts in the fourth quarter of 2024 based on the Phase 1 expansion in MYTHIC trial evaluating lunresertib in combination with camonsertib in patients harboring CCNE1 amplification or FBXW7 or PPP2R1A deleterious alterations. Grade 3 anemia has been significantly reduced to 25% as of the March 2024 cut-off date in patients treated at the RP2D and updated dosing schedule, from 45% as previously presented at the September 2023 data cut-off date. The U.S. Food and Drug Administration (FDA) has agreed with the RP2D of lunresertib 80mg BID and camonsertib 80mg QD. Efficacy and tolerability assessment at RP2D is ongoing, and the Company expects to present data from the dose expansion cohorts in patients with ovarian and endometrial cancer in the fourth quarter of 2024. First patient was dosed in April 2024 in the Phase 1 MYTHIC clinical trial evaluating lunresertib in combination with Debio 0123, a highly selective, brain-penetrant, clinical WEE1 inhibitor, in advanced solid tumors harboring CCNE1 amplification or FBXW7 or PPP2R1a deleterious alterations. The primary endpoints are safety, tolerability and RP2D, as well as preliminary efficacy of the combination. Repare is expected to report initial data from this trial in 2025. Initial data from the Phase 1 MINOTAUR trial evaluating lunresertib in combination with FOLFIRI for the treatment of advanced solid tumors demonstrated no significant incremental toxicities in the combination of lunresertib and FOLFIRI over FOLFIRI alone. In addition, Repare has observed favorable tolerability in colorectal and other gastrointestinal tumors, unlike some other agents combined with irinotecan. This data will be presented at the European Society of Medical Oncology (ESMO) Gastrointestinal (GI) Cancers Congress 2024, taking place in Munich, Germany on June 26-29. Camonsertib (RP-3500) Regained global development and commercialization rights for camonsertib from Roche, effective May 7, 2024. Since inception of the Roche camonsertib collaboration, Repare has earned a cumulative total of $182.6 million from Roche, including the upfront and milestone payments, in addition to certain additional reimbursements from Roche. Initiating Phase 2 TRESR expansion in approximately 20 patients with ATM-mutated (ATMm) NSCLC, supported by early, promising camonsertib monotherapy signal in patients with ATMm NSCLC from the ongoing Phase 1/2 TRESR trial. Repare is expected to report initial data in 2025. RP-1664 First patient dosed in the multicenter, open-label Phase 1 dose escalation trial (LIONS) of its polo-like kinase 4 (PLK4) inhibitor, RP-1664, in adult and adolescent patients with TRIM37-high and other biomarkers in February 2024. RP-3467 Initiation of a Phase 1 dose finding trial of RP-3467, a potential best-in-class Polθ ATPase inhibitor, is expected in the second half of 2024. Other Highlights In March 2024, Bristol-Myers Squibb exercised its one remaining option to in-license an undruggable target for a combined total of five druggable targets and one undruggable target over the course of the collaboration. In April 2024, Repare announced the appointment of Steven H. Stein, M.D., Chief Medical Officer of Incyte Corporation, to Repare’s Board of Directors, effective as of June 17, 2024, the date of the Company's upcoming annual meeting of shareholders (the “Annual Meeting”). The Company also announced that Todd Foley has decided not to stand for re-election as a director of the Company following the end of his current term as a Class I director on the date of the Annual Meeting, after serving more than seven years on the Board. Summary of Expected Milestones: H1 2024 Initial Phase 1 MINOTAUR (lunresertib + FOLFIRI combination) data to be reported at ESMO GI in June 2024 H2 2024 Camonsertib monotherapy expansion to NSCLC in TRESR Initiation of Phase 1 clinical trial of RP-3467 Additional data from dose expansion cohorts for the MYTHIC lunresertib + camonsertib combination in ovarian and endometrial cancers by end of Q4 2024 2025 Lunresertib + Debio 0123 combination data Camonsertib monotherapy data in NSCLC Initiate first pivotal trial in an indication for lunresertib + camonsertib First Quarter 2024 Financial Results: Cash, cash equivalents and marketable securities: Cash, cash equivalents and marketable securities as of March 31, 2024 were $237.0 million, as compared to $223.6 million as of December 31, 2023. The Company believes that its cash, cash equivalents, and marketable securities are sufficient to fund its current operational plans at least into mid-2026. Revenue from collaboration agreements: Revenue from collaboration agreements was $52.4 million and $5.7 million for the three months ended March 31, 2024 and 2023, respectively. The increase in revenue for the three-month period was primarily due to the $40.0 million Roche milestone achievement in the first quarter of 2024. Research and development expenses, net of tax credits (Net R&D): Net R&D expenses were $33.0 million and $31.8 million for the three months ended March 31, 2024 and 2023, respectively. The increase in Net R&D for the three-month period was primarily due to higher direct external costs related to the progress of Repare’s lunresertib clinical program, offset by lower direct external costs of its camonsertib clinical program. General and administrative (G&A) expenses: G&A expenses were $8.6 million and $8.5 million for the three months ended March 31, 2024 and 2023, respectively. Net income (loss): Net income was $13.2 million, or $0.30 per diluted share, for the three months ended March 31, 2024, and net loss was $34.9 million, or $0.83 per diluted share, for the three months ended March 31, 2023. 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 1/2 clinical development; camonsertib (also known as RP-3500), a potential leading ATR inhibitor currently in Phase 1/2 clinical development; RP-1664, a Phase 1 PLK4 inhibitor; RP-3467, a preclinical Polθ ATPase inhibitor program; as well as additional, undisclosed preclinical programs. For more information, please visit and follow @Reparerx on X (formerly Twitter) and LinkedIn. SNIPRx® is a registered trademark of Repare Therapeutics Inc. Forward-Looking Statements This press release contains “forward-looking statements” within the meaning of the Private Securities Litigation Reform Act of 1995 and securities laws in Canada. All statements in this press release other than statements of historical facts are “forward-looking statements. These statements may be identified by words such as “aims,” “anticipates,” “believes,” “could,” “estimates,” “expects,” “forecasts,” “goal,” “intends,” “may,” “plans,” “possible,” “potential,” “seeks,” “will” and variations of these words or similar expressions that are intended to identify forward-looking statements, although not all forward-looking statements contain these words. Forward-looking statements in this press release include, but are not limited to, statements regarding: the design, objectives, initiation, timing, progress and results of current and future preclinical studies and clinical trials of the Company’s product candidates, including the expansion of its Phase 1 MYTHIC trial evaluating lunresertib alone and in combination with camonsertib, its Phase 1 MINOTAUR trial evaluating lunresertib in combination with FOLFIRI, the Module of the Company’s Phase 1/1b MYTHIC trial of, its Phase 1/1b trial of Debio 0123 and lunresertib in partnership with Debiopharm, the expansion of its Phase 2 TRESR trial of camonsertib in patients with ATMm, its Phase 1 LIONS trial of RP-1664, its Phase 1 trial of RP-3467; its planned expansion of development of lunresertib plus camonsertib combination; a potential registrational trial in 2025; the tolerability, efficacy and clinical progress of camonsertib, lunresertib, RP-1664 and RP-3467; the potential of RP-3467 as a best-in-class Polθ ATPase inhibitor; the potential synergies of Debio 0123 in combination with lunresertib, lunresertib in combination with camonsertib and lunresertib in combination with FOLFIRI; the Company’s anticipated cash runway; and the benefits and ability to discover further targets and clinical candidates from the Company’s discovery platform. These forward-looking statements are based on the Company’s expectations and assumptions as of the date of this press release. Each of these forward-looking statements involves risks and uncertainties that could cause the Company’s clinical development programs, future results or performance to differ materially from those expressed or implied by the forward-looking statements. Many factors may cause differences between current expectations and actual results, including: the potential that success in preclinical testing and earlier clinical trials does not ensure that later clinical trials will generate the same results or otherwise provide adequate data to demonstrate the efficacy and safety of a product candidate; the impacts of macroeconomic conditions, including the conflict in Ukraine and the conflict in the Middle East, heightened inflation and uncertain credit and financial markets, on the Company’s business, clinical trials and financial position; unexpected safety or efficacy data observed during preclinical studies or clinical trials; clinical trial site activation or enrollment rates that are lower than expected; the Company’s ability to realize the benefits of its collaboration and license agreements; changes in expected or existing competition; changes in the regulatory environment; the uncertainties and timing of the regulatory approval process; and unexpected litigation or other disputes. Other factors that may cause the Company’s actual results to differ from those expressed or implied in the forward-looking statements in this press release are identified in the section titled "Risk Factors" in the Company’s Quarterly Report on Form 10-Q for the quarter ended March 31, 2024 filed with the Securities and Exchange Commission (“SEC”) and the Québec Autorité des Marchés Financiers ("AMF") on May 7, 2024. The Company expressly disclaims any obligation to update any forward-looking statements contained herein, whether as a result of any new information, future events, changed circumstances or otherwise, except as otherwise required by law. For more information, please visit reparerx.com and follow Repare on Twitter at @RepareRx and on LinkedIn at . Repare Therapeutics Inc. Consolidated Balance Sheets (Unaudited) (Amounts in thousands of U.S. dollars, except share data) As of March 31, As of December 31, 2024 2023 ASSETS CURRENT ASSETS: Cash and cash equivalents $ 103,217 $ 111,268 Marketable securities 133,784 112,359 Income tax receivable 10,829 10,813 Other current receivables 3,377 4,499 Prepaid expenses 3,463 4,749 Total current assets 254,670 243,688 Property and equipment, net 3,714 4,215 Operating lease right-of-use assets 2,763 3,326 Income tax receivable 1,630 2,276 Other assets 307 396 TOTAL ASSETS $ 263,084 $ 253,901 LIABILITIES AND SHAREHOLDERS’ EQUITY CURRENT LIABILITIES: Accounts payable $ 6,825 $ 2,400 Accrued expenses and other current liabilities 20,454 24,057 Operating lease liability, current portion 2,218 2,400 Deferred revenue, current portion 1,073 10,222 Total current liabilities 30,570 39,079 Operating lease liability, net of current portion 561 1,010 Deferred revenue, net of current portion — 1,730 TOTAL LIABILITIES 31,131 41,819 SHAREHOLDERS’ EQUITY Preferred shares, no par value per share; unlimited shares authorized as of March 31, 2024 and December 31, 2023, respectively; 0 shares issued and outstanding as of March 31, 2024, and December 31, 2023, respectively — — Common shares, no par value per share; unlimited shares authorized as of March 31, 2024 and December 31, 2023; 42,445,406 and 42,176,041 shares issued and outstanding as of March 31, 2024 and December 31, 2023, respectively 486,375 483,350 Additional paid-in capital 65,638 61,813 Accumulated other comprehensive (loss) income (113 ) 28 Accumulated deficit (319,947 ) (333,109 ) Total shareholders’ equity 231,953 212,082 TOTAL LIABILITIES AND SHAREHOLDERS’ EQUITY $ 263,084 $ 253,901 Repare Therapeutics Inc. Consolidated Statements of Operations and Comprehensive Loss (Unaudited) (Amounts in thousands of U.S. dollars, except share and per share data) Three Months Ended March 31, 2024 2023 Revenue: Collaboration agreements $ 52,404 $ 5,678 Operating expenses: Research and development, net of tax credits 32,970 31,830 General and administrative 8,618 8,529 Total operating expenses 41,588 40,359 Income (loss) from operations 10,816 (34,681 ) Other income (expense), net Realized and unrealized gain (loss) on foreign exchange 31 (56 ) Interest income 2,968 3,427 Other expense (24 ) (15 ) Total other income, net 2,975 3,356 Income (loss) before income taxes 13,791 (31,325 ) Income tax expense (629 ) (3,616 ) Net income (loss) $ 13,162 $ (34,941 ) Other comprehensive (loss) income: Unrealized (loss) gain on available-for-sale marketable securities $ (141 ) $ 193 Total other comprehensive (loss) income (141 ) 193 Comprehensive income (loss) $ 13,021 $ (34,748 ) Net income (loss) per share attributable to common shareholders: Basic $ 0.31 $ (0.83 ) Diluted $ 0.30 $ (0.83 ) Weighted-average common shares outstanding: Basic 42,234,001 42,040,674 Diluted 44,024,198 42,040,674

LAUSANNE, Switzerland & MONTREAL--(BUSINESS WIRE)-- Debiopharm ( ), a privately-owned, Swiss-based biopharmaceutical company aiming to establish tomorrow’s standards of care to cure cancer and infectious diseases, and Repare Therapeutics Inc. (“Repare”) (Nasdaq: RPTX), a leading clinical-stage precision oncology company, announced that the first patient has been dosed in Module 4 of the ongoing Phase 1/1b MYTHIC (NCT04855656) clinical trial, investigating the combination of Debio 0123 and lunresertib. In this trial, Debiopharm and Repare seek to assess the safety, pharmacokinetics, pharmacodynamics and preliminary clinical activity of this PKMYT1 and WEE1 inhibitor combination. In early January, Debiopharm and Repare announced a collaboration to evaluate the clinical combination of Debio 0123, an oral, brain-penetrant, highly selective WEE1 kinase inhibitor and lunresertib, a first-in-class, selective and potent oral small molecule inhibitor of PKMYT1. This collaboration is based on preclinical in vivo data and other data showing rapid, remarkable tumor regressions and high predicted clinical tolerability and represents the first clinical-stage approach to inhibiting both PKMYT1 and WEE1. “Debio 0123 and lunresertib have the potential to be a transformative combination therapy for cancer patients with high unmet medical need,” said Angela Zubel, Chief Development Officer of Debiopharm. “Treating the first patient in this new Module of the MYTHIC clinical trial is an important milestone for our collaboration, as it allows us to execute clinical development swiftly. We look forward to working closely with Repare to further characterize these innovative precision medicine therapies.” “We are excited to have treated our first patient with lunresertib and Debio 0123,” said Maria Koehler, MD, PhD, Executive Vice President and Chief Medical Officer of Repare. “Each of these compounds is well understood and clinically characterized. This combination provides us a unique opportunity to optimize dosing between two selective compounds and overcome limitations inherent to dual-inhibitor approaches. We expect this clinical collaboration will allow us to optimize the excellent synergy we saw preclinically to maximize patient benefit and tolerability.” About Debio 0123 Debio 0123 is an oral, brain-penetrant, highly selective WEE1 kinase inhibitor. WEE1 is a key regulator of the G2/M and S phase checkpoints, activated in response to DNA damage and replication stress, allowing cells to repair their DNA before resuming their cell cycle. WEE1 inhibition, particularly in combination with DNA damaging agents, induces an accumulation of DNA damage and pushes the cells through cell cycle without DNA repair, promoting mitotic catastrophe and induction of apoptosis in cancer cells. Debio 0123 is currently being investigated in clinical trials in patients with solid tumors as a monotherapy and in combination. Debio 0123 is being developed to address high unmet needs of patients living with the burden of difficult-to-treat cancers. About Lunresertib Lunresertib (RP-6306) is a first-in-class, selective and potent oral small molecule inhibitor of PKMYT1, a cancer target Repare discovered and identified as synthetic lethal with CCNE1 amplification, FBXW7 and PPP2R1A alterations in solid tumors. Lunresertib is currently the sole PKMYT1 inhibitor known to be in clinical trials and is being evaluated alone and in combinations across several studies in the US, UK/EU4 and Canada. Repare has presented positive initial Phase 1 data from its ongoing Phase 1 MYTHIC trial (NCT04855656) demonstrating proof of concept for lunresertib alone and in combination. In addition to being well tolerated and having a compelling safety profile, Repare presented anti-tumor activity for lunresertib in combination with camonsertib, an ATR inhibitor developed by Repare, expanded clinical studies for which are ongoing. 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 1/2 clinical development; camonsertib (also known as RP-3500), a potential leading ATR inhibitor currently in Phase 1/2 clinical development; RP-1664, a Phase 1 PLK4 inhibitor program; RP-3467, a preclinical Polθ ATPase inhibitor program; as well as additional, undisclosed preclinical programs. For more information, please visit reparerx.com and follow @Reparerx on X (formerly Twitter) and LinkedIn. Debiopharm's Commitment to Patients Debiopharm aims to develop innovative therapies that target high unmet medical needs in oncology and bacterial infections. Bridging the gap between disruptive discovery products and real-world patient reach, we identify high-potential compounds and technologies for in-licensing, clinically demonstrate their safety and efficacy, and then hand stewardship to large pharmaceutical commercialization partners to maximize patient access globally. For more information, please visit We are on Twitter. Follow us @DebiopharmNews at View source version on businesswire.com: Contacts Debiopharm Dawn Bonine Head of Communications dawn.bonine@debiopharm.com Tel: +41 (0)21 321 01 11 Source: Debiopharm View this news release online at: