Adagrasib

– Oral presentation at RAS Summit supports development of next-generation FTI in combination with KRASG12C inhibitors – – Company to include KRASG12C-mutant NSCLC in combination portion of Phase 1 clinical trial of KO-2806 (FIT-001) – SAN DIEGO, Sept. 28, 2023 (GLOBE NEWSWIRE) -- Kura Oncology, Inc. (Nasdaq: KURA), a clinical-stage biopharmaceutical company committed to realizing the promise of precision medicines for the treatment of cancer, today reported preclinical data supporting the development of its next-generation farnesyl transferase inhibitor (FTI) KO-2806 in combination with KRASG12C inhibitors to drive tumor regressions and durable responses in KRASG12C-mutant non-small cell lung cancer (NSCLC). The new findings are being presented in an oral session today at the 5th RAS-Targeted Drug Development Summit in Boston. A copy of the presentation, entitled “Farnesyl Transferase Inhibitors – Evolution from Targeting HRAS to Overcoming Adaptive Resistance to Targeted Therapies,” is available in the Posters and Presentations section on Kura’s website. KRASG12C inhibitors have previously been shown to activate RTK signaling, leading to ERK-RSK and/or mTOR-S6 pathway reactivation. The Company’s new preclinical data show that co-treatment of preclinical models of KRASG12C-mutant NSCLC with KO-2806 and adagrasib deepens signaling inhibition at multiple nodes, including the MAPK and mTOR pathways, while decreasing cell proliferation. In both cell-derived (CDX) and patient-derived (PDX) xenograft models originating from NSCLC tumors, the combination of KO-2806 with adagrasib induced tumor regressions. In addition, the CDX and PDX models demonstrated enhanced duration and depth of antitumor response compared to adagrasib as a single-agent therapy. “Despite advances with KRAS-targeted therapies, a significant unmet need remains for patients with KRASG12C-mutant NSCLC as acquired resistance occurs early and often,” said Francis Burrows, Ph.D., Senior Vice President, Translational Research. “We are highly encouraged by these first preclinical data for KO-2806, which demonstrate the potential for FTIs as a mechanism-based combination agent to enhance antitumor activity of targeted therapies, such as KRASG12C inhibitors.” Kura is on track to dose the first patient in its Phase 1 dose-escalation trial of KO-2806 (FIT-001) in the second half of 2023. Concurrent with the monotherapy dose escalation, the Company plans to evaluate KO-2806 in dose-escalation combination cohorts with other targeted therapies in advanced solid tumors, including clear cell renal cell carcinoma (ccRCC) and KRASG12C NSCLC. About Kura Oncology Kura Oncology is a clinical-stage biopharmaceutical company committed to realizing the promise of precision medicines for the treatment of cancer. The Company’s pipeline consists of small molecule drug candidates that target cancer signaling pathways. Ziftomenib is a once-daily, oral drug candidate targeting the menin-KMT2A protein-protein interaction for the treatment of genetically defined acute myeloid leukemia (AML) patients with high unmet need. Kura is currently enrolling patients in a Phase 2 registration-directed trial of ziftomenib in NPM1-mutant relapsed or refractory AML (KOMET-001). The Company is also conducting a series of studies to evaluate ziftomenib in combination with current standards of care, beginning with venetoclax/azacitidine and standard induction cytarabine/daunorubicin chemotherapy in NPM1-mutant and KMT2A-rearranged newly diagnosed and relapsed/refractory AML (KOMET-007). Tipifarnib, a potent and selective farnesyl transferase inhibitor (FTI), is currently in a Phase 1/2 trial in combination with alpelisib for patients with PIK3CA-dependent head and neck squamous cell carcinoma (KURRENT-HN). Kura is also preparing to evaluate KO-2806, a next-generation FTI, in a Phase 1 dose-escalation trial as a monotherapy and in combination with other targeted therapies, beginning with ccRCC and KRASG12C-mutant NSCLC (FIT-001). For additional information, please visit Kura’s website at www.kuraoncology.com and follow us on Twitter and LinkedIn. Forward-Looking Statements This news release contains certain forward-looking statements that involve risks and uncertainties that could cause actual results to be materially different from historical results or from any future results expressed or implied by such forward-looking statements. Such forward-looking statements include statements regarding, among other things, the efficacy, safety and therapeutic potential of KO-2806, potential benefits of combining KO-2806 with appropriate standards of care, and progress and expected timing of the KO-2806 program and clinical trials. Factors that may cause actual results to differ materially include the risk that compounds that appeared promising in early research or clinical trials do not demonstrate safety and/or efficacy in later preclinical studies or clinical trials, the risk that Kura may not obtain approval to market its product candidates, uncertainties associated with performing clinical trials, regulatory filings, applications and other interactions with regulatory bodies, risks associated with reliance on third parties to successfully conduct clinical trials, the risks associated with reliance on outside financing to meet capital requirements, and other risks associated with the process of discovering, developing and commercializing drugs that are safe and effective for use as human therapeutics, and in the endeavor of building a business around such drugs. You are urged to consider statements that include the words “may,” “will,” “would,” “could,” “should,” “believes,” “estimates,” “projects,” “promise,” “potential,” “expects,” “plans,” “anticipates,” “intends,” “continues,” “designed,” “goal,” or the negative of those words or other comparable words to be uncertain and forward-looking. For a further list and description of the risks and uncertainties the Company faces, please refer to the Company's periodic and other filings with the Securities and Exchange Commission (SEC), including the Company’s Form 10-Q for the quarter ended June 30, 2023 filed with the SEC on August 9, 2023, which are available at www.sec.gov. Such forward-looking statements are current only as of the date they are made, and Kura assumes no obligation to update any forward-looking statements, whether as a result of new information, future events or otherwise. Contacts Investors:Pete De SpainExecutive Vice President, Investor Relations &Corporate Communications(858) 500-8833pete@kuraoncology.com Media:Alexandra WeingartenSenior Manager, Corporate Communications(858) 500-8822alexandra@kuraoncology.com

Preclinical and Clinical Presentations Include Update on FRAME Study Low-Grade Serous Ovarian Cancer Efficacy Data BOSTON--(BUSINESS WIRE)-- Verastem Oncology (Nasdaq: VSTM), a biopharmaceutical company committed to advancing new medicines for patients with cancer, today announced the presentation of scientific background and clinical trial updates on the avutometinib and defactinib programs at the 5th Annual RAS-Targeted Drug Development Summit in Boston, Massachusetts. The updates are part of two oral presentations by Jonathan Pachter, PhD, Chief Scientific Officer and Louis Denis, MD, Chief Medical Officer at Verastem Oncology. The first presentation titled “Vertical Inhibition of RAS, RAF & MEK: Enhancing Antitumor Efficacy of KRAS G12C & G12D Inhibitors with RAF/MEK Clamp Avutometinib”, includes scientific rationale for clinical combinations with avutometinib and defactinib in various RAS pathway-driven cancers. The second presentation titled, “Introducing Rational Combinations of RAF/MEK Clamp Avutometinib: Breakthrough Therapy Designation & Beyond,” discusses novel combination treatment approaches and provides an overview of the avutometinib and defactinib clinical development program. The clinical presentation includes updated FRAME study efficacy data showing an overall response rate (ORR) of 42% (11 of 26) in evaluable patients with low grade serous ovarian cancer (LGSOC) (n=26). Among patients with KRAS mutant LGSOC (n=12), the ORR was 58% (7 of 12), compared to patients with KRAS wild-type LGSOC (n=12), the ORR was 33% (4 of 12). Across all LGSOC patients, the median duration of response was 26.9 months (95% CI: 8.5-47.3) while median progression free survival (PFS) was 20.0 months (95% CI: 11.1-31.2). As of the July 2023 data cutoff date, 19% of patients (5 of 26) were still on study treatment with a minimum follow-up of 17 months. “We are encouraged that the high rate and long duration of objective responses in the recurrent LGSOC cohort of the FRAME study continue to provide foundational proof-of-concept supporting Breakthrough Therapy Designation for the combination of avutometinib and defactinib,” said Dan Paterson, President and Chief Executive Officer of Verastem Oncology. The FRAME study, led by Professor Udai Banerji, MBBS, MD, DNB, PhD, FRCP, Deputy Director of the Drug Development Unit at The Institute of Cancer Research, London, and The Royal Marsden NHS Foundation Trust, is an ongoing investigator-sponsored trial evaluating avutometinib in combination with defactinib among patients with advanced solid tumors, including recurrent LGSOC. The Company recently reported results of Part A of RAMP 201 in recurrent LGSOC including confirmed ORR by blinded independent central review of 45% (13/29; 95% CI: 26%,64%) with a tolerable safety pro the American Society of Clinical Oncology (ASCO) 2023 Annual Meeting. The median duration of response and median PFS from RAMP 201 Part A were not yet reached at the time of the ASCO 2023 presentation. About Verastem Oncology Verastem Oncology (Nasdaq: VSTM) is a development-stage biopharmaceutical company committed to the development and commercialization of new medicines to improve the lives of patients diagnosed with cancer. Our pipeline is focused on novel small molecule drugs that inhibit critical signaling pathways in cancer that promote cancer cell survival and tumor growth, including RAF/MEK inhibition and focal adhesion kinase (FAK) inhibition. For more information, please visit . About the Avutometinib and Defactinib Combination Avutometinib is a RAF/MEK clamp that induces inactive complexes of MEK with ARAF, BRAF and CRAF potentially creating a more complete and durable anti-tumor response through maximal RAS pathway inhibition. In contrast to currently available MEK inhibitors, avutometinib blocks both MEK kinase activity and the ability of RAF to phosphorylate MEK. This unique mechanism allows avutometinib to block MEK signaling without the compensatory activation of MEK that appears to limit the efficacy of other inhibitors. The U.S. Food and Drug Administration granted Breakthrough Therapy designation for the combination of Verastem Oncology’s investigational RAF/MEK clamp avutometinib, with defactinib, its FAK inhibitor, for the treatment of all patients with recurrent low-grade serous ovarian cancer (LGSOC) regardless of KRAS status after one or more prior lines of therapy, including platinum-based chemotherapy. Verastem Oncology is currently conducting clinical trials with its RAF/MEK clamp avutometinib in RAS pathway-driven tumors as part of its (Raf And Mek Program). RAMP 301 is a planned Phase 3 confirmatory trial evaluating the combination of avutometinib and defactinib versus standard chemotherapy or hormonal therapy for the treatment of recurrent LGSOC. RAMP 201 is a Phase 2 registration-directed trial of avutometinib in combination with defactinib in patients with recurrent LGSOC and has completed enrollment in the dose optimization and expansion phases and is enrolling for low-dose evaluation. Verastem Oncology has established clinical collaborations with Amgen and Mirati to evaluate LUMAKRAS™ (sotorasib) and KRAZATI™ (adagrasib) in combination with avutometinib in KRAS G12C mutant NSCLC as part of the RAMP 203 and RAMP 204 trials, respectively. Supported by the “Therapeutic Accelerator Award” Verastem Oncology received from PanCAN, the Company is conducting RAMP 205, a Phase 1b/2 clinical trial evaluating avutometinib and defactinib with gemcitabine/nab-paclitaxel in patients with front-line metastatic pancreatic cancer.