WRN

IDE275 (GSK959) development is progressing into First-in-Human Phase 1 clinical trial(s) for the treatment of MSI-High solid tumors, representing IDEAYA's 5th potential first-in-class clinical program MSI-High prevalence in endometrial, colorectal, and gastric cancers is ~31%, 20%, and 19%, respectively, highlighting the market potential of IDE275 (GSK959) IDEAYA to receive a $7 million payment for IND acceptance, and potential future aggregate milestones of up to $950 million. IDEAYA has a 50/50 US Profit Share and an 80/20 (GSK/IDEAYA) global research and development cost share SOUTH SAN FRANCISCO, Calif., Oct. 28, 2024 /PRNewswire/ -- IDEAYA Biosciences, Inc. (Nasdaq:IDYA), a precision medicine oncology company committed to the discovery and development of targeted therapeutics, announced the clearance of an investigational new drug (IND) application with the U.S. Food and Drug Administration (FDA) for the initiation of a Phase 1 clinical trial to evaluate IDE275 (GSK959), a potential first-in-class and best-in-class Werner Helicase (WRN) inhibitor. IDE275 (GSK959) has demonstrated robust and selective synthetic lethality preclinically in the high microsatellite instability (MSI-High) biomarker setting, and the Phase 1 clinical trial will enroll patients having tumors characterized by MSI-High. "IDE275 represents IDEAYA's fifth potential first-in-class clinical program in our precision medicine oncology pipeline and has a potentially differentiated best-in-class profile that we are targeting to present at a future medical conference with GSK. The robust preclinical efficacy observed by IDE275 selectively in the MSH-High biomarker setting, including monotherapy regressions, provides a double-digit % prevalence target patient population across several major solid tumor types, including endometrial, colorectal and gastric cancer," added Yujiro S. Hata, President and Chief Executive Officer, IDEAYA Biosciences. IDE275 (GSK959) is a potential first-in-class small molecule inhibitor of Werner Helicase that was discovered by IDEAYA in collaboration with GSK. In preclinical studies, IDE275 has demonstrated robust and selective synthetic lethality in the MSI-High biomarker setting, including single-agent tumor regressions in-vivo in MSI-High CDX and PDX models derived from colorectal, endometrial and gastric cancers. Initiation of the Phase 1 trial for IDE275 is projected in the fourth quarter of 2024. GSK is the sponsor of the IND application and plans to develop IDE275 (GSK959) as both a monotherapy agent and in combination with a PD-1 inhibitor in a Phase 1 clinical trial for patients having MSI-High tumors. The percent prevalence of MSI-High in solid tumors, including endometrial, colorectal, and gastric cancers, has been reported at approximately 31%, 20%, and 19%, respectively (JCO Precision Oncology, September 2017). GSK is responsible for 80% of global research and development costs for IDE275 (GSK959) and IDEAYA is responsible for 20% of such costs. IDEAYA is eligible to receive a $7 million milestone payment upon acceptance of the IND by the U.S. Food and Drug Administration (FDA), and a potential additional $10 million milestone payment upon initiation of Phase 1 clinical dose expansion. IDEAYA may potentially also receive up to $465 million in further later-stage development and regulatory milestones. Upon potential commercialization, IDEAYA will be eligible to receive up to $475 million of commercial milestones 50% of U.S. net profits and tiered royalties on global non-U.S. net sales of IDE275 (GSK959) – ranging from high single-digit to sub-teen double-digit percentages, subject to certain customary reductions. About IDEAYA Biosciences IDEAYA is a precision medicine oncology company committed to the discovery and development of targeted therapeutics for patient populations selected using molecular diagnostics. IDEAYA's approach integrates capabilities in identifying and validating translational biomarkers with drug discovery to select patient populations most likely to benefit from its targeted therapies. IDEAYA is applying its research and drug discovery capabilities to synthetic lethality – which represents an emerging class of precision medicine targets. IDEAYA's updated corporate presentation is available on its website, at its Investor Relations page: . Forward-Looking Statements This press release contains forward-looking statements, including, but not limited to, statements related to (i) expectations regarding the clinical activity profile and potential advantages of IDEAYA's clinical programs, (ii) the initiation of a Phase 1 clinical trial to evaluate IDE275 (GSK959) and (iii) the receipt of development and regulatory milestones . Such forward-looking statements involve substantial risks and uncertainties that could cause IDEAYA's preclinical and clinical development programs, future results, performance or achievements to differ significantly from those expressed or implied by the forward-looking statements. Such risks and uncertainties include, among others, the uncertainties inherent in the drug development process, including IDEAYA's programs' early stage of development, the process of designing and conducting preclinical and clinical trials, the regulatory approval processes, the timing of regulatory filings, the challenges associated with manufacturing drug products, IDEAYA's ability to successfully establish, protect and defend its intellectual property, and other matters that could affect the sufficiency of existing cash to fund operations. IDEAYA undertakes no obligation to update or revise any forward-looking statements. For a further description of the risks and uncertainties that could cause actual results to differ from those expressed in these forward-looking statements, as well as risks relating to the business of IDEAYA in general, see IDEAYA's Annual Report on Form 10-K dated February 20, 2024 and any current and periodic reports filed with the U.S. Securities and Exchange Commission. Investor and Media Contact IDEAYA Biosciences Andres Ruiz Briseno SVP, Head of Finance and Investor Relations [email protected] SOURCE IDEAYA Biosciences, Inc. WANT YOUR COMPANY'S NEWS FEATURED ON PRNEWSWIRE.COM? 440k+ Newsrooms & Influencers 9k+ Digital Media Outlets 270k+ Journalists Opted In GET STARTED

-- New development candidate, NTX-452, a non-covalent WRN inhibitor, demonstrated significant tumor regression and complete responses at low oral doses in MSI-H tumor models refractory to immunotherapy and chemotherapy -- -- Company plans to initiate clinical trial of NTX-452 in first half of 2025 -- BOSTON--(BUSINESS WIRE)-- Nimbus Therapeutics , LLC (“Nimbus Therapeutics” or “Nimbus”), a biotechnology company that designs and develops breakthrough medicines for patients through its powerful computational drug discovery engine, announced that it is presenting preclinical data on its new development candidate, NTX-452, a novel Werner syndrome helicase (WRN) inhibitor, at the 36 th EORTC-NCI-AACR Symposium on Molecular Targets and Cancer Therapeutics, taking place October 23-25, 2024 in Barcelona, Spain. WRN is a helicase required for DNA replication and DNA repair and is a validated target for tumors with microsatellite instability (MSI). MSI is a phenotypic consequence of defective mismatch repair (dMMR) and occurs in various tumor types, including colorectal, gastric and endometrial cancers. Inhibition of WRN activity has the potential to induce synthetic lethality in MSI-high (MSI-H) tumors. Using a structure-based drug design approach, Nimbus developed highly potent and selective covalent and non-covalent inhibitors of WRN, and has selected a novel non-covalent inhibitor, NTX-452, as the clinical candidate. In a poster (abstract #356) titled “Preclinical Characterization of NTX-452, a Potent, Selective and Highly Efficacious WRN Inhibitor for the Treatment of MSI-H Tumors,” Nimbus is presenting new data from preclinical assays and several tumor models that support the potential of the company’s non-covalent WRN inhibitor as a treatment for MSI-H tumors. Key findings from the preclinical studies include: NTX-452 demonstrated potent and selective inhibition of WRN activity with favorable drug-like properties. The compound showed synthetic lethality in MSI-H tumor cells, triggering a DNA damage response that suppressed cell viability and promoted cell death. Treatment with NTX-452 at low doses in vivo exhibited a robust pharmacodynamic response, resulting in tumor regression across multiple MSI-H cell line-derived xenograft (CDX) and patient-derived xenograft (PDX) tumor models, including established models for colorectal, gastric and endometrial cancers. Significant tumor regression and complete responses were observed at low oral doses in MSI-H models refractory to immunotherapy and chemotherapy. “These compelling preclinical results for NTX-452 further highlight the significant potential of our WRN inhibitor as a promising therapeutic approach for patients with MSI-H tumors, many of whom fail to respond to or eventually relapse with current standard of care therapies including immune checkpoint inhibitors,” said Peter Tummino, Ph.D., Chief Scientific Officer of Nimbus. “Our novel non-covalent approach to WRN inhibition, coupled with the robust efficacy demonstrated across diverse tumor types and treatment settings, positions our program for potential best-in-class status. We are particularly encouraged by the low doses required to achieve robust anti-tumor activity in preclinical models, which may translate to an improved benefit-risk pro the clinic.” The preclinical pro NTX-452 suggests several potential advantages in the treatment of MSI-H tumors, including: The non-covalent mechanism may offer more durable on-target activity, and a greater safety window compared to covalent inhibitors. High potency and favorable pharmacokinetic properties indicate the potential for target levels of efficacy at lower doses. Broad efficacy across treatment-naïve, chemotherapy-pretreated, and immunotherapy-pretreated models suggests potential utility in both early-stage and advanced disease settings. Activity in multiple MSI-H tumor types, including those with diverse genetic alterations, indicates potential broad applicability across dMMR/MSI-H cancers. Nimbus is advancing NTX-452 with plans to enter the clinic in the first half of 2025. About Nimbus Therapeutics Nimbus Therapeutics is a clinical-stage, structure-based drug discovery company developing novel small molecule medicines designed to act against well-validated but difficult-to-drug targets implicated in multiple human diseases. The company advances promising research based on a unique strategy that combines leading-edge computational technologies with a tailored array of machine learning-based predictive modeling approaches. Nimbus’ pipeline includes a clinical-stage HPK1 inhibitor for the treatment of cancer (NCT05128487), as well as a diverse portfolio of preclinical programs focused on cancer, including the WRN program, autoimmune conditions, and metabolic diseases. The company is headquartered in Boston, Mass. To learn more about Nimbus, please visit . Contacts Media Cindy Fung, PhD Nimbus Therapeutics cindy.fung@nimbustx.com

The total operating revenues in H1 2024 amounted to USD 12.1 million and increased by USD 4.2 million compared to H1 2023. As of September, 5 2024, Ryvu's cash position was USD 65.3 million. Together with other already secured funding sources, this cash position provides a runway through Q1 2026. On September 5, 2024, Ryvu received the third and final tranche of financing under the agreement with the European Investment Bank, amounting to EUR 6 million. The Management Board decided to advance Ryvu's potentially best-in-class PRMT5 inhibitor RVU305 to further steps of preclinical development, including toxicology and API/IMP manufacturing, targeting IND/CTA filing in H2 2025. KRAKOW, Poland, Sept. 12, 2024 /PRNewswire/ -- Ryvu Therapeutics (WSE: RVU), a clinical-stage drug discovery and development company focusing on novel small molecule therapies that address emerging targets in oncology, today reported financial results for the half year ended June 30, 2024, and provided a corporate update. Pawel Przewiezlikowski, Chief Executive Officer of Ryvu Therapeutics, said: - We are progressing with enrollment in two already launched RVU120 Phase II studies and expect to present the initial data update in December at the ASH 2024 conference. We are also close to launching two additional Phase II studies. By the end of the year, we should be enrolling patients across four independent development paths in hematologic malignancies. The next few quarters will be an important period of data generation for RVU120 and progress in the preclinical pipeline. H1 2024 SUMMARY AND RECENT CORPORATE EVENTS RVU120 clinical development plan progress In early 2024, Ryvu launched two Phase II studies with RVU120: (i) the RIVER-52 study investigating RVU120 as monotherapy in two genetically defined cohorts of patients with r/r AML and in a cohort of patients with HR-MDS, and (ii) the RIVER-81 study investigating RVU120 in combination with venetoclax in patients with AML. The RIVER-52 study was initially launched at clinical sites in Poland and Italy, and as of August 31, 16 sites had been activated for enrollment in these two countries. Starting from September 2024, Ryvu will activate additional clinical sites in Spain, France, and Canada, targeting the activation of a total of 46 sites by the end of 2024. The RIVER-81 study was initially launched at clinical sites in Poland and Italy, followed by the activation of additional sites in Spain and France. As of August 31, 27 sites had been activated for enrollment across all four countries, with a total of 34 sites planned to be activated by the end of 2024. POTAMI-61, a Phase II study evaluating the efficacy of RVU120 as a monotherapy and combination therapy in patients with myelofibrosis (MF), is expected to begin enrollment shortly, initially in Poland and Italy. REMARK, a Phase II study of RVU120 in patients with low-risk myelodysplastic syndromes (LR-MDS), will enroll patients across five countries: Poland, Germany, France, Spain, Italy, and is also expected to start enrollment shortly. REMARK will be conducted as an investigator-initiated study through the EMSCO network with Prof. Uwe Platzbecker, a globally renowned expert in the field of LR-MDS, as the Coordinating Principal Investigator. At the 2024 European Hematology Association (EHA) Congress (June 13-16, Madrid, Spain) Ryvu presented clinical and preclinical data from RVU120 program. Key takeaways: RIVER-52 had immature data for efficacy assessment in the target population, even though preliminary signs of clinical benefit had been observed in ongoing patients. Initial data from the RIVER-81 study demonstrated the safety of RVU120 in combination with venetoclax at the initial dose level. Translational data support the synergistic combination of RVU120 and venetoclax in patients with AML, including RVU120's potential to overcome resistance to venetoclax treatment. Translational data underscores RVU120's potential in myeloproliferative neoplasms (MPNs) phenotypes (single-agent or combined with ruxolitinib (RUX)) partly through downregulation of pro-inflammatory cytokines. Additionally, RVU120 exhibits synergy with a whole class of JAK inhibitors and the BET inhibitor pelabresib which support CDK8 inhibition as a potential novel therapeutic strategy in MPNs, with a focus on myelofibrosis (MF). Preclinical Pipeline updates PRMT5 On September 9, 2024, the Management Board decided to advance Ryvu's potentially best-in-class PRMT5 inhibitor RVU305 to further steps of preclinical development, including toxicology and API/IMP manufacturing, targeting IND/CTA filing in H2 2025. RVU305 has a potentially best-in-class profile with favorable drug-like properties, including oral administration, a strong antiproliferative effect on MTAP-deleted cell lines, and a good safety window for MTAP WT cells. Data on Ryvu's PRMT5 inhibitors were presented at AACR 2024 in April. WRN Ryvu's WRN inhibitor program demonstrates target engagement and selective potency with a synthetic lethal effect, providing pharmacological proof-of-concept; in vivo efficacy studies exhibited pronounced tumor growth inhibition in an MSI-H colorectal cancer xenograft model and support WRN inhibition as a new, targeted cancer therapy. Data were presented at AACR 2024 in April. The company is targeting preclinical candidate selection in the upcoming quarters. Key business events From March to September 2024, Ryvu fulfilled conditions for the disbursement of all three tranches of financing from the EIB and received a total amount of EUR 22 million. In June 2024, Ryvu concluded a funding agreement with the Polish Agency for Enterprise Development ("PARP") and expects to receive approximately USD 6.6 million (PLN 26.3 million) in grant funding over five years to support its proprietary ONCO Prime discovery platform. In May 2024, Ryvu obtained the status of Associate Partner within the IPCEI Med4Cure program with its PANACEA-NOVO project – a unique platform for the discovery of new therapeutic targets with potential in the treatment of rare cancers, combined with several early discovery campaigns for innovative drugs. Ryvu expects that potential future grant funding may cover 75-80% of the total costs, which are PLN 142.5 million. In February 2024, Ryvu announced that it had achieved the second milestone under the license agreement with Exelixis and received a USD 2.0 million (PLN 7.9 million) payment. UPCOMING INDUSTRY AND INVESTOR EVENTS 6th Annual RAS-Targeted Drug Development Summit, September 24-26. Krzysztof Brzozka, Chief Scientific Officer of Ryvu Therapeutics will showcase ONCO Prime, Ryvu's discovery platform that uses isogenic primary cells and patient-derived cells to identify novel cancer targets. Dr. Brzozka's presentation on September 25, at 4:45 PM ET (Boston), will highlight ONCO Prime's application in the identification of KRAS-specific synthetic lethal targets. Trigon BioTech & MedTech Conference 2024 (online), October 2. Ryvu will host investor meetings during the conference. Erste Finest CEElection Investor Conference 2024 (Vienna, Austria), October 8-9. Ryvu will host investor meetings during the conference. ENA Symposium 2024 (Barcelona, Spain), October 23-25. Ryvu will share its scientific achievements. LSBC 2024 Central European Life Science Investment Conference (Krakow, Poland), October 23-25. Pawel Przewiezlikowski will be a panelist at the discussion titled "Poland's top Biotech Executives discuss today's challenges and the influence of AI" and will host investor and partnering meetings during the conference. H1 2024 FINANCIAL UPDATE Cash Position – On June 30, 2024, Ryvu Therapeutics held USD 63.9 million in cash, cash equivalents, and bonds, compared to USD 63.7 million on December 31, 2023. On September 5, 2024, Ryvu Therapeutics held USD 65.3 million in cash, cash equivalents, and bonds, including the third tranche of venture debt from the EIB, amounting to EUR 6 million. Operating Revenues – In H1 2024, Ryvu recognized total operating revenues (including grants) of USD 12.1 million, compared to USD 7.9 million in H1 2023. Operating costs, related primarily to research and development expenditures, excluding the valuation of NodThera shares and non-cash cost of valuation of the Incentive Program in H1 2024, amounted to USD 25.4 million, compared to USD 17.7 million in H1 2023. Net Loss Attributable to Common Shareholders – In H1 2024, the net loss attributable to common shareholders, excluding the non-cash cost of the Incentive Program valuation, amounted to USD 11.9 million, compared to USD 9.4 million in the previous year. About Ryvu Therapeutics Ryvu Therapeutics is a clinical-stage drug discovery and development company focused on novel small-molecule therapies that address emerging targets in oncology. Internally discovered pipeline candidates use diverse therapeutic mechanisms driven by emerging knowledge of cancer biology, including small molecules directed at kinase, synthetic lethality, and immuno-oncology targets. Ryvu's most advanced programs include RVU120, a selective CDK8/CDK19 kinase inhibitor with the potential to treat hematological malignancies and solid tumors, currently in Phase II development (i) as a monotherapy for the treatment of patients with relapsed/refractory acute myeloid leukemia (r/r AML) and high-risk myelodysplastic syndromes (HR-MDS) as well as (ii) in combination with venetoclax for the treatment of patients with r/r AML. Another clinical program, SEL24 (MEN1703), is a dual PIM/FLT3 kinase inhibitor licensed to the Menarini Group. Ryvu Therapeutics has signed multiple partnering and licensing deals with global companies, including BioNTech and Exelixis. The Company was founded in 2007 and is headquartered in Kraków, Poland. Ryvu is listed on the Warsaw Stock Exchange and is a component of the mWIG40 index. For more information, please see . 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