Granulosa Cell Tumor of the Ovary

STAMFORD, Conn., Feb. 29, 2024 (GLOBE NEWSWIRE) -- SpringWorks Therapeutics, Inc. (Nasdaq: SWTX), a commercial-stage biopharmaceutical company focused on severe rare diseases and cancer, announced today that the European Medicines Agency (EMA) has validated the Marketing Authorization Application (MAA) for nirogacestat, an oral gamma secretase inhibitor, for the treatment of adults with desmoid tumors. If approved, nirogacestat will be the first therapy to receive marketing authorization in the European Union (EU) for the treatment of desmoid tumors. Nirogacestat previously received Orphan Drug designation from the European Commission for the treatment of soft tissue sarcoma. “The validation of our marketing authorization application is an important step towards bringing nirogacestat to patients with desmoid tumors in the European Union who currently do not have an approved therapy,” said Saqib Islam, Chief Executive Officer of SpringWorks. “We look forward to working with the EMA on this important submission.” The MAA submission is based on results from the Phase 3 DeFi trial. In DeFi, nirogacestat met the primary endpoint of improving progression-free survival (PFS), demonstrating a statistically significant improvement over placebo with a 71% reduction in the risk of disease progression (hazard ratio (HR) = 0.29 (95% CI: 0.15, 0.55); p< 0.001). Median PFS was not reached in the nirogacestat arm and was 15.1 months in the placebo arm. Confirmed objective response rate (ORR) based on blinded independent central review of Response Evaluation Criteria in Solid Tumors v1.1 was 41% with nirogacestat versus 8% with placebo (p<0.001); the complete response rate was 7% in the nirogacestat arm and 0% in the placebo arm. Nirogacestat also demonstrated early and sustained improvements in patient-reported outcomes (PROs) measured as of the cycle 10 assessment, including pain (p<0.001), desmoid tumor-specific symptoms (p<0.001), physical/role functioning (p<0.001), and overall health-related quality of life (p≤0.01). Nirogacestat exhibited a manageable safety and tolerability profile. The most common adverse events (>15%) reported in patients receiving nirogacestat were diarrhea, ovarian toxicity, rash, nausea, fatigue, stomatitis, headache, abdominal pain, cough, alopecia, upper respiratory tract infection, and dyspnea. The DeFi trial results were published in the March 9, 2023 edition of the New England Journal of Medicine and presented during a Presidential Symposium at the European Society for Medical Oncology Congress 2022.1, 2 “Desmoid tumors can have a significant impact on patients’ lives and there is a pressing need for a new treatment for patients in Europe,” said Bernd Kasper, M.D., Ph.D., University of Heidelberg, Mannheim Cancer Center, Mannheim, Germany and Principal Investigator of the DeFi trial. “In the DeFi trial, nirogacestat demonstrated significant improvements across progression-free survival, objective response rate, and patient-reported outcomes, and had a safety pro supports long-term dosing. These results support that nirogacestat will be a practice-changing therapy if approved by the EMA.” In November 2023, the U.S. Food and Drug Administration approved OGSIVEO™ (nirogacestat) for the treatment of adults with progressing desmoid tumors who require systemic treatment. The U.S. prescribing information includes the following Warnings & Precautions: diarrhea, ovarian toxicity, hepatotoxicity, non-melanoma skin cancers, electrolyte abnormalities, and embryo-fetal toxicity. Please see below for additional Important Safety Information. About Desmoid Tumors Desmoid tumors (sometimes referred to as aggressive fibromatosis, or desmoid fibromatosis) are rare, aggressive, locally invasive tumors of the soft tissues that can be serious, debilitating, and, in rare cases when vital structures are impacted, life-threatening.3,4 Desmoid tumors are most commonly diagnosed in patients between the ages of 20 and 44 years, with a two-to-three times higher prevalence in females. 5,6 In the European Union, the incidence of desmoid tumors is estimated to be approximately 3-5 cases per million per year.7 Although they do not metastasize, desmoid tumors are associated with recurrence rates of up to 77% after surgical resection.5,8,9 Desmoid tumor experts and treatment guidelines now recommend systemic therapies as first-line intervention instead of surgery for most tumor locations requiring treatment.9 About OGSIVEO™ (nirogacestat) OGSIVEO (nirogacestat) is an oral, selective, small molecule gamma secretase inhibitor approved in the United States for the treatment of adult patients with progressing desmoid tumors who require systemic treatment. OGSIVEO is not approved for the treatment of any other indication in the United States, or for any indication in any other jurisdiction by any other health authority. SpringWorks is also evaluating nirogacestat as a potential treatment for patients with ovarian granulosa cell tumors and for patients with multiple myeloma as part of several B-cell maturation agent (BCMA) combination therapy regimens in collaboration with leaders in industry and academia. IMPORTANT SAFETY INFORMATION WARNINGS AND PRECAUTIONS Diarrhea: Diarrhea occurred in 84% of patients treated with OGSIVEO. Grade 3 events occurred in 16% of patients. Monitor patients and manage using antidiarrheal medications. Modify dose as recommended. Ovarian Toxicity: Female reproductive function and fertility may be impaired in patients treated with OGSIVEO. Impact on fertility may depend on factors like duration of therapy and state of gonadal function at time of treatment. Long-term effects on fertility have not been established. Advise patients on the potential risks for ovarian toxicity before initiating treatment. Monitor patients for changes in menstrual cycle regularity or the development of symptoms of estrogen deficiency, including hot flashes, night sweats, and vaginal dryness. Hepatotoxicity: ALT or AST elevations occurred in 30% and 33% of patients, respectively. Grade 3 ALT or AST elevations (>5 × ULN) occurred in 6% and 2.9% of patients. Monitor liver function tests regularly and modify dose as recommended. Non-Melanoma Skin Cancers: New cutaneous squamous cell carcinoma and basal cell carcinoma occurred in 2.9% and 1.4% of patients, respectively. Perform dermatologic evaluations prior to initiation of OGSIVEO and routinely during treatment. Electrolyte Abnormalities: Decreased phosphate (65%) and potassium (22%) occurred in OGSIVEO-treated patients. Phosphate <2 mg/dL occurred in 20% of patients. Grade 3 decreased potassium occurred in 1.4% of patients. Monitor phosphate and potassium levels regularly and supplement as necessary. Modify dose as recommended. Embryo-Fetal Toxicity: Oral administration of nirogacestat to pregnant rats during the period of organogenesis resulted in embryo-fetal toxicity at maternal exposures below human exposure at the recommended dose of 150 mg twice daily. Advise pregnant women of the potential risk to a fetus. Advise females and males of reproductive potential to use effective contraception during treatment with OGSIVEO and for 1 week after the last dose. ADVERSE REACTIONS The most common (≥15%) adverse reactions were diarrhea, ovarian toxicity, rash, nausea, fatigue, stomatitis, headache, abdominal pain, cough, alopecia, upper respiratory tract infection, and dyspnea. Serious adverse reactions occurring in ≥2% of patients were ovarian toxicity (4%). The most common laboratory abnormalities (≥15%) were decreased phosphate, increased urine glucose, increased urine protein, increased AST, increased ALT, and decreased potassium. DRUG INTERACTIONS CYP3A Inhibitors and Inducers: Avoid concomitant use with strong or moderate CYP3A inhibitors (including grapefruit products, Seville oranges, and starfruit) and strong or moderate CYP3A inducers. Gastric Acid Reducing Agents: Avoid concomitant use with proton pump inhibitors and H2 blockers. If concomitant use cannot be avoided, OGSIVEO can be staggered with antacids (e.g., administer OGSIVEO 2 hours before or 2 hours after antacid use). Consult the full Prescribing Information prior to and during treatment for important drug interactions. To report suspected adverse reactions, contact SpringWorks Therapeutics at 1-888-400-SWTX (1-888-400-7989) or FDA at 1-800-FDA-1088 or Please see full U.S. Prescribing Information for OGSIVEO for more information. About SpringWorks Therapeutics SpringWorks is a commercial-stage biopharmaceutical company applying a precision medicine approach to developing and delivering life-changing medicines for people with severe rare diseases and cancer. OGSIVEO™ (nirogacestat), approved in the United States for the treatment of adult patients with progressing desmoid tumors who require systemic treatment, is the Company’s first FDA-approved therapy. SpringWorks also has a diversified targeted therapy pipeline spanning solid tumors and hematological cancers, with programs ranging from preclinical development through advanced clinical trials. In addition to its wholly owned programs, SpringWorks has also entered into multiple collaborations with innovators in industry and academia to unlock the full potential for its portfolio and create more solutions for patients in need. For more information, visit and follow @SpringWorksTx on X (formerly Twitter), LinkedIn, and YouTube. SpringWorks Forward-Looking Statements This press release contains “forward-looking statements” within the meaning of the Private Securities Litigation Reform Act of 1995, as amended, relating to our business, operations, and financial conditions, including but not limited to current beliefs, expectations and assumptions regarding the future of our business, future plans and strategies, our development and commercialization plans, our preclinical and clinical results, the market potential of OGSIVEO for adult patients with desmoid tumors, expectations regarding timing and results of the EMA’s review of the MAA for nirogacestat, including the adequacy of the data contained in the MAA to serve as the basis for marketing approval of nirogacestat for the treatment of desmoid tumors in the European Union, as well as relating to other future conditions. Words such as, but not limited to, “look forward to,” “believe,” “expect,” “anticipate,” “estimate,” “intend,” “plan,” “would,” “should” and “could,” and similar expressions or words, identify forward-looking statements. New risks and uncertainties may emerge from time to time, and it is not possible to predict all risks and uncertainties. Any forward-looking statements in this presentation are based on management’s current expectations and beliefs and are subject to a number of risks, uncertainties and important factors that may cause actual events or results to differ materially from those expressed or implied by any forward-looking statements contained in this presentation, including, without limitation, risks relating to: (i) our expectations regarding the potential clinical benefit of nirogacestat for patients with desmoid tumors, (ii) estimates regarding the number of adult patients who are diagnosed with desmoid tumors annually per year in Europe and the potential market for nirogacestat, (iii) the fact that topline or interim data from clinical studies may not be predictive of the final or more detailed results of such study or the results of other ongoing or future studies, (iv) the timing of our planned regulatory submissions and interactions, including the timing and outcome of decisions made by the U.S. Food and Drug Administration (FDA), European Medicines Agency (EMA), and other regulatory authorities, investigational review boards at clinical trial sites and publication review bodies, (v) whether FDA, EMA, or other regulatory authorities will require additional information or further studies, or may fail or refuse to approve or may delay approval of our product candidates, including nirogacestat and mirdametinib, (vi) our ability to obtain regulatory approval of any of our product candidates or maintain regulatory approvals granted for our products, (vii) our ability to maintain adequate patent protection and successfully enforce patent claims against third parties, and (viii) our ability to meet any specific milestones set forth herein. Except as required by applicable law, we do not plan to publicly update or revise any forward-looking statements contained herein, whether as a result of any new information, future events, changed circumstances or otherwise. Although we believe the expectations reflected in such forward-looking statements are reasonable, we can give no assurance that such expectations will prove to be correct. Accordingly, readers are cautioned not to place undue reliance on these forward-looking statements. For further information regarding the risks, uncertainties and other factors that may cause differences between SpringWorks’ expectations and actual results, you should review the “Risk Factors” in Item 1A of Part I of SpringWorks’ Annual Report on Form 10-K for the year ended December 31, 2023, as well as discussions of potential risks, uncertainties and other important factors in SpringWorks’ subsequent filings. Contacts Kim Diamond Vice President, Communications and Investor Relations Phone: 203-561-1646 Email: kdiamond@springworkstx.com Samantha Hilson Sandler Senior Director, Investor Relations Phone: 203-461-5501 Email: samantha.sandler@springworkstx.com References 1 Gounder M, Ratan R, Alcindor T, et al. Nirogacestat, a Gamma-Secretase Inhibitor for Desmoid Tumors. N Engl J Med. 2023;388:898-912. doi:10.1056/NEJMoa2210140. 2 Kasper B, Ratan R, Alcindor T, et al. DeFi: A phase III, randomized controlled trial of nirogacestat versus placebo for progressing desmoid tumors (DT). Ann Oncol. 2022;33(suppl_7): S808-S869. 3 Sbaraglia M, Bellan E, Dei Tos AP. The 2020 WHO Classification of Soft Tissue Tumours: news and perspectives. Pathologica. 2021;113(2):70-84. doi:10.32074/1591-951X-213. 4 Penel N, Chibon F, Salas S. Adult desmoid tumors: biology, management and ongoing trials. Curr Opin Oncol. 2017;29(4):268-274. doi:10.1097/CCO.0000000000000374. 5 Skubitz KM. Biology and treatment of aggressive fibromatosis or desmoid tumor. Mayo Clin Proc. 2017;92(6):947-964. doi:10.1016/j.mayocp.2017.02.012. 6 van Broekhoven DLM, Grünhagen DJ, den Bakker MA, van Dalen T, Verhoef C. Time trends in the incidence and treatment of extra-abdominal and abdominal aggressive fibromatosis: a population-based study. Ann Surg Oncol. 2015;22(9):2817-2823. doi:10.1245/s10434-015-4632-y. 7 Orphanet Report Series: Rare Diseases collection. Prevalence and incidence of rare diseases: bibliographic data. January 2019. . 8 Easter DW, Halasz NA. Recent trends in the management of desmoid tumors. Summary of 19 cases and review of the literature. Ann Surg. 1989;210(6):765-769. doi:10.1097/00000658-198912000-00012. 9 Gronchi A, Kasper B, et al. Desmoid Tumor Working Group. The management of desmoid tumours: a joint global consensus-based guideline approach for adult and paediatric patients. Eur J Cancer. 2020;127:96-107. doi:10.1016/j.ejca.2019.11.013.

– Reported OGSIVEO™ (nirogacestat) net product revenue of $5.4 million in first partial quarter of launch following FDA approval on November 27, 2023 – – Submitted Marketing Authorization Application to the European Medicines Agency for nirogacestat for the treatment of desmoid tumors – – Presented positive topline data from Phase 2b ReNeu trial of mirdametinib in patients with NF1-PN; on track to submit New Drug Application in first half of 2024 – – Submitted IND for SW-682 and received FDA clearance to proceed with Phase 1a trial – – Ended 2023 with $662.6 Million in Cash, Cash Equivalents and Marketable Securities – STAMFORD, Conn., Feb. 27, 2024 (GLOBE NEWSWIRE) -- SpringWorks Therapeutics, Inc. (Nasdaq: SWTX), a commercial-stage biopharmaceutical company focused on severe rare diseases and cancer, today reported financial results for the fourth quarter and full year periods ended December 31, 2023 and provided an update on recent company developments. “In 2023, OGSIVEO became the first FDA-approved therapy for adults with desmoid tumors with our approval in November and we are very pleased with the initial progress of our launch. We are also very excited by our opportunity in NF1-PN based on the positive topline data from our pivotal Phase 2b ReNeu trial, which demonstrated mirdametinib's best-in-class potential for both children and adults with these devastating tumors. In addition, we made strong progress across our broader pipeline and continued to strengthen our financial position and our intellectual property protection for our lead assets,” said Saqib Islam, Chief Executive Officer of SpringWorks. “Our focus for 2024 is to continue delivering a successful U.S. launch for OGSIVEO in desmoid tumors, to file our NDA for mirdametinib with the goal of having our second approval by 2025, to make progress towards expanding the reach of OGSIVEO into additional geographies outside of the U.S., and to unlock additional opportunities across our emerging portfolio.” Recent Business Highlights and Upcoming Milestones OGSIVEO™ (Nirogacestat) Received U.S. Food and Drug Administration (FDA) approval for OGSIVEO, an oral gamma secretase inhibitor, for the treatment of adult patients with progressing desmoid tumors who require systemic treatment on November 27, 2023.Launched OGSIVEO in the U.S. and achieved net product revenue of $5.4 million in the first partial quarter of the launch. To date, OGSIVEO has been reimbursed by payers representing over 98% of commercial lives, as well as by Medicare and Medicaid, with coverage aligned to the FDA-approved label.Highlighted the update of the NCCN Clinical Practice Guidelines in Oncology (NCCN Guidelines®) in December 2023 which recommend nirogacestat as an NCCN Category 1, Preferred treatment option for desmoid tumors.Submitted a Marketing Authorization Application (MAA) for nirogacestat for the treatment of adult patients with desmoid tumors to the European Medicines Agency (EMA) in February 2024.Presented additional patient-reported outcome data from the Phase 3 DeFi trial at the 2023 Connective Tissue Oncology Society Annual Meeting.On track to report initial data from the Phase 2 trial evaluating nirogacestat as a monotherapy in patients with recurrent ovarian granulosa cell tumors in the second half of 2024.Continuing to support several industry and academic collaborator studies evaluating nirogacestat as part of B-cell maturation antigen (BCMA) combination therapy regimens across treatment lines in patients with multiple myeloma. Mirdametinib Presented positive topline data from the pediatric and adult cohorts of the Phase 2b ReNeu trial evaluating mirdametinib, an investigational MEK inhibitor, in NF1-associated plexiform neurofibromas (NF1-PN) in November 2023. The confirmed objective response rate was 52% in pediatric patients and 41% in adult patients, as assessed by Blinded Independent Central Review, which was the primary endpoint of the study. Mirdametinib treatment also showed deep and durable responses and demonstrated significant improvements in key secondary patient-reported outcome measures. Mirdametinib was generally well tolerated in the trial, with the majority of adverse events (AEs) being Grade 1 or Grade 2. The most frequently reported AEs were rash, diarrhea, and vomiting in the pediatric cohort and rash, diarrhea, and nausea in the adult cohort.On track to submit an New Drug Application (NDA) to the FDA for mirdametinib for the treatment of children and adults with NF1-PN in the first half of 2024.Expect to present data from the pediatric and adult cohorts of the ReNeu trial at a medical congress in the first half of 2024 and to submit the trial results for publication in a peer-reviewed journal in 2024. Emerging Pipeline On track to present additional data from the dose expansion portion of the Phase 1b trial evaluating brimarafenib (BGB-3245) in adult patients with RAF mutant solid tumors in the second half of 2024. Brimarafenib is an investigational, selective RAF dimer inhibitor being developed by MapKure, LLC, a joint venture between SpringWorks and BeiGene, Ltd.Patients continue to be enrolled in the dose escalation phase of the SpringWorks-sponsored Phase 1/2a combination study of brimarafenib and mirdametinib.The FDA cleared the Investigational New Drug (IND) application submitted by MapKure for a combination study of brimarafenib with panitumumab, a monoclonal antibody targeting EGFR, in colorectal and pancreatic cancer patients with known MAPK pathway mutations. MapKure expects to initiate a Phase 1b trial in the first quarter of 2024.Dose expansion cohort is ongoing in the BeiGene-sponsored Phase 1b/2 trial evaluating mirdametinib in combination with BeiGene’s RAF dimer inhibitor, lifirafenib, in adult patients with NRAS mutant solid tumors.The FDA cleared the IND application for SW-682, a novel, oral, potent, and selective TEA Domain inhibitor designed to treat tumors driven by Hippo pathway mutations. SpringWorks plans to initiate a Phase 1a trial of SW-682 in Hippo mutant solid tumors in the first half of 2024. General Corporate Strengthened balance sheet with upsized public offering in December 2023; gross proceeds from the offering, before deducting underwriting discounts and commissions and offering expenses, were approximately $316.2 million.The United States Patent and Trademark Office has recently issued four new patents for OGSIVEO and one new patent for mirdametinib, extending protection for both products into 2043. The U.S. patent portfolio for OGSIVEO includes 16 Orange Book listed patents; the U.S. patent portfolio for mirdametinib includes 10 patents that are expected to be Orange Book listed. Fourth Quarter and Full Year 2023 Financial Results Revenues: OGSIVEO net product revenues were $5.4 million in the fourth quarter of 2023, the first partial quarter of the U.S. launch.Research and Development (R&D) Expenses: R&D expenses were $43.7 million and $150.5 million for the fourth quarter and full year 2023, respectively, compared to $37.9 million and $146.1 million for the comparable periods of 2022. The increase in R&D expense for the fourth quarter and year ended 2023 was primarily attributable to an increase in employee costs associated with head count growth, partially offset by a decrease in costs related to drug manufacturing, clinical trials and other research.Selling, General and Administrative (SG&A) Expenses: SG&A expenses were $59.8 million and $197.6 million for the fourth quarter and full year 2023, respectively, compared to $40.5 million and $134.6 million for the comparable periods of 2022. The increase in SG&A expense for the fourth quarter and the full year 2023 were largely attributable to commercial readiness activities to support the U.S. launch of OGSIVEO.Net Loss Attributable to Common Stockholders: SpringWorks reported a net loss of $94.3 million, or $1.44 per share, for the fourth quarter of 2023 and a net loss of $325.1 million, or $5.15 loss per share, for the year ended December 31, 2023. This compares to a net loss of $74.2 million, or $1.19 per share, for the fourth quarter of 2022 and a net loss of $277.4 million, or $5.21 per share for the year ended December 31, 2022.Cash Position: Cash, cash equivalents and marketable securities were $662.6 million as of December 31, 2023. About SpringWorks Therapeutics SpringWorks is a commercial-stage biopharmaceutical company applying a precision medicine approach to developing and delivering life-changing medicines for people with severe rare diseases and cancer. OGSIVEO™ (nirogacestat), approved in the United States for the treatment of adult patients with progressing desmoid tumors who require systemic treatment, is the Company’s first FDA-approved therapy. SpringWorks also has a diversified targeted therapy pipeline spanning solid tumors and hematological cancers, with programs ranging from preclinical development through advanced clinical trials. In addition to its wholly owned programs, SpringWorks has also entered into multiple collaborations with innovators in industry and academia to unlock the full potential for its portfolio and create more solutions for patients in need. For more information, visit www.springworkstx.com and follow @SpringWorksTx on X (formerly Twitter), LinkedIn, and YouTube. SpringWorks uses its website as a means of disclosing material non-public information and for complying with its disclosure obligations under Regulation FD. Such disclosures will be included on SpringWorks' website in the Investors & Media section. Accordingly, investors should monitor such portions of the SpringWorks website, in addition to following press releases, SEC filings and public conference calls and webcasts. Forward-Looking Statements This press release contains “forward-looking statements” within the meaning of the Private Securities Litigation Reform Act of 1995, as amended, relating to our business, operations, and financial conditions, including but not limited to current beliefs, expectations and assumptions regarding the future of our business, future plans and strategies, our development and commercialization plans, our preclinical and clinical results, the market potential of OGSIVEO for adult patients with desmoid tumors, expectations regarding timing and results of the EMA’s review of the MAA for nirogacestat, including its ongoing validation of our submission package, and the adequacy of the data contained in the MAA to serve as the basis for marketing approval of nirogacestat for the treatment of desmoid tumors in the European Union, the potential for the results of the Phase 2b ReNeu clinical trial to support an NDA submission for mirdametinib in first half of 2024, our plans to report additional data from the Phase 2b ReNeu clinical trial at an upcoming medical conference and submit for publication data from such clinical trial in a peer-reviewed medical journal in 2024, the potential for mirdametinib to become an important new treatment for patients with NF1-PN, our plans for seeking regulatory approval for and making mirdametinib available for NF1-PN patients, if approved, expectations regarding the timing and initial data from the Phase 2 trial evaluating nirogacestat in patients with recurrent ovarian granulosa cell tumors, our plans to initiate a Phase 1a trial of SW-682 in Hippo mutant solid tumors in the first half of 2024, our plans to report additional clinical data of nirogacestat in combination with BCMA-directed therapies and initiate additional planned Phase 1 collaborator studies, our expectations regarding the potential for the Phase 1b dose expansion phase of brimarafenib, our plans to present additional data for brimarafenib monotherapy in MAPK-mutant solid tumors in second half of 2024, our plans to support MapKure’s initiation of a Phase 1b trial of brimarafenib with panitumumab in CRC and pancreatic cancer patients in first quarter of 2024, expectations about whether our patents for our lead assets will adequately protect SpringWorks against competition, as well as relating to other future conditions. Words such as, but not limited to, “look forward to,” “believe,” “expect,” “anticipate,” “estimate,” “intend,” “plan,” “would,” “should” and “could,” and similar expressions or words, identify forward-looking statements. New risks and uncertainties may emerge from time to time, and it is not possible to predict all risks and uncertainties. Any forward-looking statements in this presentation are based on management’s current expectations and beliefs and are subject to a number of risks, uncertainties and important factors that may cause actual events or results to differ materially from those expressed or implied by any forward-looking statements contained in this presentation, including, without limitation, risks relating to: (i) the success of our commercialization efforts with respect to OGSIVEO, (ii) our limited experience as a commercial company, (iii) our ability to obtain or maintain adequate coverage and reimbursement for OGSIVEO, (iv) the success and timing of our product development activities, including the initiation and completion of our clinical trials, (v) our expectations regarding the potential clinical benefit of OGSIVEO for adult patients with desmoid tumors who require systemic treatment, (vi) the potential for OGSIVEO to become the new standard of care for adult patients with desmoid tumors, (vii) estimates regarding the number of adult patients who are diagnosed with desmoid tumors annually per year in the U.S. and the potential market for OGSIVEO, (viii) the fact that topline or interim data from clinical studies may not be predictive of the final or more detailed results of such study or the results of other ongoing or future studies, (ix) the success and timing of our collaboration partners’ ongoing and planned clinical trials, (x) the timing of our planned regulatory submissions and interactions, including the timing and outcome of decisions made by the FDA, EMA, and other regulatory authorities, investigational review boards at clinical trial sites and publication review bodies, (xi) whether FDA, EMA, or other regulatory authorities will require additional information or further studies, or may fail or refuse to approve or may delay approval of our product candidates, including nirogacestat and mirdametinib, (xii) our ability to obtain regulatory approval of any of our product candidates or maintain regulatory approvals granted for our products, (xiii) our plans to research, discover and develop additional product candidates, (xiv) our ability to enter into collaborations for the development of new product candidates and our ability to realize the benefits expected from such collaborations, (xv) our ability to maintain adequate patent protection and successfully enforce patent claims against third parties, (xvi) the adequacy of our cash position to fund our operations through any time period indicated herein, (xvii) our ability to establish manufacturing capabilities, and our and our collaboration partners’ abilities to manufacture our product candidates and scale production, and (xviii) our ability to meet any specific milestones set forth herein. Except as required by applicable law, we do not plan to publicly update or revise any forward-looking statements contained herein, whether as a result of any new information, future events, changed circumstances or otherwise. Although we believe the expectations reflected in such forward-looking statements are reasonable, we can give no assurance that such expectations will prove to be correct. Accordingly, readers are cautioned not to place undue reliance on these forward-looking statements. For further information regarding the risks, uncertainties and other factors that may cause differences between SpringWorks’ expectations and actual results, you should review the “Risk Factors” in Item 1A of Part I of SpringWorks’ Annual Report on Form 10-K for the year ended December 31, 2023, as well as discussions of potential risks, uncertainties and other important factors in SpringWorks’ subsequent filings. SpringWorks Therapeutics, Inc.Condensed Consolidated Statements of Operations(Unaudited) ​Year Ended December 31,(in thousands, except share and per-share data)2023 2022 2021Revenue: Product revenue, net$5,447 $— $— Total revenue 5,447 — — Operating expenses: Cost of product revenue 422 — — Research and development 150,487 146,122 101,676 Selling, general and administrative 197,551 134,552 71,792 Total operating expenses 348,460 280,674 173,468 Loss from operations (343,013) (280,674) (173,468)Interest and other income: Interest and other income, net 22,947 6,147 546 Total interest and other income 22,947 6,147 546 Equity method investment loss (5,038) (2,890) (988)Net loss$(325,104) $(277,417) $(173,910) Net loss per share, basic and diluted$(5.15) $(5.21) $(3.59)Weighted average common shares outstanding, basic and diluted 63,123,936 53,290,528 48,497,790 SpringWorks Therapeutics, Inc.Selected Balance Sheet Data(Unaudited) As of December 31, 2023 2022(in thousands) Cash, cash equivalents and marketable securities$662,588 $597,006 Working Capital (1) 422,742 548,711 Total assets 725,788 630,242 Total liabilities 99,569 72,050 Accumulated deficit (895,034) (569,930)Total stockholders’ equity 626,219 558,192 (1) We define Working Capital as current assets less current liabilities. Contacts:Kim DiamondVice President, Communications and Investor RelationsPhone: 203-561-1646Email: kdiamond@springworkstx.com Samantha Hilson SandlerSenior Director, Investor RelationsPhone: 203-461-5501Email: samantha.sandler@springworkstx.com

A SpringWorks Therapeutics drug has won FDA approval for treating a rare type of connective tissue tumor, making it the first approved therapy for this rare type of tumor. It’s also the first product approval for the Pfizer spinout. Desmoid tumors are soft tissue tumors that develop in connective tissue. They’re related to cancers of connective tissue called sarcomas, but are not considered cancerous because they do not spread throughout the body. However, desmoid tumors can be locally aggressive, invading surrounding healthy tissues such as joints, muscle, and internal organs. The resulting tumor growth can cause chronic pain, disfigurement, internal bleeding, and impaired range of motion. While desmoid tumors can be removed surgically, recurrence of these tumors is high. Cancer drugs and opioids can be used as off-label treatments, but these medicines have limited efficacy and introduce a wide range of side effects, SpringWorks CEO Saqib Islam said, speaking during a Tuesday conference call. “All of these are the alternatives that people use that actually are false choices from our perspective, and there’s a reason that nothing else is approved because nothing else works for an extended period of time,” Islam said. FDA approval of the Stamford, Connecticut-based company’s new drug covers the treatment of patients whose desmoid tumors not suitable for surgical removal. The twice daily pill, known in development as nirogacestat, will be marketed under the brand name Ogsiveo. Ogsiveo is a small molecule designed to block an enzyme called gamma secretase, which in turn has the effect of blocking activation of the Notch receptor. Dysregulation of this receptor contributes to tumor growth. FDA approval of Ogsiveo is based results of a placebo-controlled study that enrolled 142 adults with progressing desmoid tumors not amenable to surgery. The main goal was to measure progression-free survival, defined as the length of time the patient is alive after the start of treatment until the tumors progress. The study also assessed tumor shrinkage. Results showed clinically meaningful and statistically significant improvement in progression-free survival in the treatment arm compared to the placebo group. A patient-reported pain assessment also favored the study drug. The most common side effects reported in the trial included diarrhea, ovarian toxicity, rash, nausea, fatigue, inflammation in the mouth called stomatitis, headache, and abdominal pain. Ogsiveo came from Pfizer, which had advanced the drug as far as Phase 1 testing. In 2017, the pharmaceutical giant bundled Ogsiveo with another drug candidate that no longer fit with its pipeline plans, spinning out those assets into new company SpringWorks. The former Pfizer asset may yet find use as a cancer drug. Through partnerships with big pharma companies, including Pfizer, the SpringWorks molecule is being evaluated as part of combinations with approved multiple myeloma medicines that target the cancer protein BCMA. The basic idea is that blocking gamma secretase may improve the activity of BCMA-targeting drugs. But SpringWorks’ internal research with its lead molecule remains focused on rare tumors. The company is testing whether its gamma secretase inhibitor can also treat ovarian granulosa cell tumors, a type of ovarian cancer. A Phase 2 test is ongoing. The other SpringWorks drug candidate licensed from Pfizer is mirdametinib, a potential treatment for neurofibromatosis type 1-associated pexiform neurofibromas, or NF1-PN. This disease causes a rare type of tumor to develop on the peripheral nerve sheath. Mirdametinib is designed to block the MEK pathway. While MEK inhibitors are already available as cancer treatments, these drugs aren’t well tolerated by patients. SpringWorks aims to block MEK while offering a tolerability profile that enables long-term use of the drug. Two weeks ago, SpringWorks reported positive preliminary Phase 2b data. Based on those results, Islam said the company plans to file an FDA submission for mirdametinib in the first half of 2024. In the nearer term, SpringWorks is preparing for Ogsiveo’s launch. The company estimates that 1,600 patients are newly diagnosed with desmoid tumors in the U.S. annually, and between 5,500 and 7,000 patients are actively managing the condition. SpringWorks Chief Commercial Officer Bhavesh Ashar said Ogsiveo will become available within the next 10 business days. The company has set a wholesale price of $29,000 for a 30-day supply of the drug. SpringWorks is also eyeing other markets for its new drug. Islam said the company plans to file a European Union application for Ogsiveo in the first half of next year. Per terms of the license agreement, SpringWorks owes Pfizer up to $232.5 million in milestone payments tied to commercialization of Ogsiveo. Pfizer will also receive royalties from sales of the new product.