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CAMBRIDGE, Mass., Sept. 30, 2024 /PRNewswire/ -- Leap Therapeutics, Inc. (Nasdaq: LPTX), a biotechnology company focused on developing targeted and immuno-oncology therapeutics, today announced that enrollment of 188 patients has been completed in the randomized controlled Part B of the DeFianCe study evaluating DKN-01, Leap's anti-Dickkopf-1 (DKK1) antibody, in combination with standard of care bevacizumab and chemotherapy as a second-line treatment for patients with advanced colorectal cancer (CRC). "The completion of enrollment in Part B of the DeFianCe study marks a significant achievement and highlights the enthusiasm in the potential of DKN-01 from both patients and healthcare providers," said Cynthia Sirard, M.D., Chief Medical Officer of Leap. "The encouraging data from Part A of the study which showed clinically meaningful response rates and durable tumor reductions, as well as a favorable safety profile in advanced CRC patients, provides a strong foundation to the expanded Part B of the study. We look forward to sharing initial data from Part B, including the subpopulation of patients with left-sided CRC, in mid 2025." The DeFianCe study (NCT05480306) is a Phase 2, open-label, global study of DKN-01 in combination with standard of care bevacizumab and chemotherapy in patients with advanced CRC who have received one prior systemic therapy for advanced disease. Part B of the study expanded from a 130 to a 188-patient randomized controlled trial, with the primary endpoint being progression free survival (PFS). An additional primary endpoint will measure PFS in the subpopulation of patients with left-sided CRC. Secondary objectives include objective response rate, duration of response, and overall survival. About Leap Therapeutics Leap Therapeutics (Nasdaq: LPTX) is focused on developing targeted and immuno-oncology therapeutics. Leap's most advanced clinical candidate, DKN-01, is a humanized monoclonal antibody targeting the Dickkopf-1 (DKK1) protein. DKN-01 is being developed in patients with esophagogastric, gynecologic, and colorectal cancers. For more information about Leap Therapeutics, visit or view our public filings with the SEC that are available via EDGAR at or via . FORWARD-LOOKING STATEMENTS This press release contains forward-looking statements within the meaning of the federal securities laws. Such statements are based upon current plans, estimates and expectations of the management of Leap that are subject to various risks and uncertainties that could cause actual results to differ materially from such statements. The inclusion of forward-looking statements should not be regarded as a representation that such plans, estimates and expectations will be achieved. Words such as "anticipate," "expect," "project," "intend," "believe," "may," "will," "should," "plan," "could," "continue," "target," "contemplate," "estimate," "forecast," "guidance," "predict," "possible," "potential," "pursue," "likely," and words and terms of similar substance used in connection with any discussion of future plans, actions or events identify forward-looking statements. All statements, other than historical facts, including statements regarding the anticipated timing of the release of clinical data, and any outcomes of such trials; the interpretation or signficiance of, or any conclusions or suggestions that can or should be drawn from, the results of, and the clinical data generated from, any of our clinical trials; the potential safety, efficacy, and regulatory and clinical progress of Leap's product candidates; our future preclinical and clinical development plans in connection with our programs; the ability to enter into a strategic partnership for DKN-01 or any of Leap's other programs; and any assumptions underlying any of the foregoing, are forward-looking statements. Important factors that could cause actual results to differ materially from Leap's plans, estimates or expectations could include, but are not limited to: (i) Leap's ability to successfully execute its clinical trials and the timing of enrollment in and cost of such clinical trials; (ii) the results of Leap's clinical trials and pre-clinical studies, including that subsequent or final results from Leap's clinical trials or pre-clinical studies may supersede, qualify, limit, or change the interpretation or significance of, preliminary or earlier results of Leap's clinical trials or pre-clinical studies; (iii) Leap's ability to successfully enter into new strategic partnerships for DKN-01 or any of its other programs; (iv) whether any Leap products will receive approval from the U.S. Food and Drug Administration or equivalent foreign regulatory agencies; (v) exposure to inflation, currency rate and interest rate fluctuations, as well as fluctuations in the market price of Leap's traded securities; and (vi) that the initiation, conduct, and completion of clinical trials, laboratory operations, manufacturing campaigns, and other studies may be delayed, adversely affected, or impacted by global conflict or supply chain related issues. New risks and uncertainties may emerge from time to time, and it is not possible to predict all risks and uncertainties. No representations or warranties (expressed or Implied) are made about the accuracy of any such forward-looking statements. Leap may not actually achieve the forecasts disclosed in such forward-looking statements, and you should not place undue reliance on such forward-looking statements. Such forward-looking statements are subject to a number of material risks and uncertainties including but not limited to those set forth under the caption "Risk Factors" in Leap's most recent Annual Report on Form 10-K filed with the SEC, as well as discussions of potential risks, uncertainties, and other important factors in its subsequent filings with the SEC. Any forward-looking statement speaks only as of the date on which it was made. Neither Leap, nor any of its affiliates, advisors or representatives, undertake any obligation to publicly update or revise any forward-looking statement, whether as result of new information, future events or otherwise, except as required by law. These forward-looking statements should not be relied upon as representing Leap's views as of any date subsequent to the date hereof. CONTACT: Douglas E. Onsi President & Chief Executive Officer Leap Therapeutics, Inc. 617-714-0360 [email protected] Matthew DeYoung Investor Relations Argot Partners 212-600-1902 [email protected] SOURCE Leap Therapeutics, Inc. WANT YOUR COMPANY'S NEWS FEATURED ON PRNEWSWIRE.COM? 440k+ Newsrooms & Influencers 9k+ Digital Media Outlets 270k+ Journalists Opted In GET STARTED

CAMBRIDGE, Mass., Aug. 12, 2024 /PRNewswire/ -- Leap Therapeutics, Inc. (Nasdaq:LPTX), a biotechnology company focused on developing targeted and immuno-oncology therapeutics, today reported financial results for the second quarter ended June 30, 2024. Leap Highlights: Overall response rate (ORR) increases to 33% across all evaluable patients and 38% across evaluable patients with left-sided CRC in updated data from Part A of the Phase 2 DeFianCe study evaluating DKN-01 in combination with bevacizumab and chemotherapy in second-line patients with advanced colorectal cancer (CRC) Expanded the randomized controlled Part B of the DeFianCe study to 180 patients; enrollment expected to be completed by end of September 2024 with data expected in mid-2025 Patient follow-up continues in the randomized controlled Part C of the Phase 2 DisTinGuish study evaluating DKN-01 in combination with tislelizumab and chemotherapy in first-line patients with advanced gastroesophageal junction (GEJ) and gastric cancer; data expected in Q4 2024 or early 2025 Completed $40 million private placement with new and existing investors, including Gilead Sciences, Inc. "With the momentum provided by our $40 million private placement, we are positioned to achieve our critical company milestones," said Douglas E. Onsi, President and Chief Executive Officer of Leap. "We have executed well on our two DKN-01 randomized controlled trials and on preparatory activities for registrational studies. We look forward to sharing initial data from both randomized controlled studies over the next 12 months as we strive to deliver new treatments for patients fighting against cancer." DKN-01 Development Update ORR increases in updated data from Part A of the DeFianCe Study . The DeFianCe study (NCT05480306) is a Phase 2 study evaluating DKN-01 in combination with bevacizumab and chemotherapy in second-line patients with advanced microsatellite stable CRC. Preliminary results from Part A of the study were previously reported at the 2024 American Society of Clinical Oncology (ASCO) Gastrointestinal Cancers Symposium in January 2024. In April 2024, a ninth Part A patient was identified as having a partial response (PR). This patient, who has left-sided Consensus Molecular Subtype 4 CRC with APC and TP53 mutations and KRAS wildtype genetics, had been previously treated with cetuximab and chemotherapy. The patient enrolled in Part A in March 2023 and had a best response of stable disease (SD) for over a year before the tumor reduction deepened into a PR. The patient remains on study with a confirmed PR. Key Updated Part A Findings (as of June 7, 2024 data cut-off) : Across all patients enrolled (n=33): ORR among response-evaluable patients (n=27) was 33% and disease control rate (DCR) was 93%, including 9 PRs and 16 patients with a best response of SD Median progression-free survival (PFS) was unchanged at 6.3 months Enhanced activity in patients with left-sided tumors (n=25), a group that has more frequent activation of the Wnt pathway modulated by DKK1 38% ORR and 100% DCR in response-evaluable population (8 PRs, 13 SDs) Median PFS was unchanged at 8.6 months DKN-01 plus bevacizumab and chemotherapy was well-tolerated, with a majority of DKN-01 related events being low grade (Grade 1/2) Enrollment in Part B of the DeFianCe Study in CRC patients is ongoing and expected to be completed by the end of September 2024. The Company expanded the randomized controlled Part B of the DeFianCe study from 130 to 180 patients and included PFS in the subpopulation of patients with left-sided CRC as an additional primary endpoint. As of August 9, 2024, 161 patients have enrolled in Part B. The Company expects to complete enrollment by the end of September 2024, with data expected mid-2025. Randomized controlled Part C of the DisTinGuish study in patients with GEJ and gastric cancer is ongoing, with initial data expected in Q4 2024 or early 2025. The DisTinGuish study (NCT0436380) is a Phase 2, randomized, open-label, multicenter study of DKN-01 in combination with tislelizumab and chemotherapy in first-line, HER-2 negative patients with GEJ and gastric cancer. Part C enrolled 170 patients randomized 1:1 to evaluate DKN-01 in combination with tislelizumab and chemotherapy, compared to tislelizumab and chemotherapy alone. The Company expects to report initial data from Part C of the DisTinGuish study in Q4 2024 or early 2025. Business Update: Completed a $40 million private placement. In April 2024, Leap entered into a securities purchase agreement with a select group of new and existing investors including Gilead Sciences, Inc., a life sciences-focused investor, Samsara BioCapital, LP, 683 Capital Partners, LP, Laurion Capital Management LP, and Rock Springs Capital Management LP. Gross proceeds from the private placement were approximately $40 million. The net proceeds from this financing, combined with existing cash, cash equivalents and marketable securities, are expected to fund Leap's operating and capital expenditures into the second quarter of 2026. Selected Second Quarter 2024 Financial Results Net Loss was $20.4 million for the second quarter 2024, compared to $13.4 million for the same period in 2023. The increase was primarily due to an increase in research and development expenses. Research and development expenses were $17.9 million for the second quarter 2024, compared to $11.1 million for the same period in 2023. The increase of $6.8 million was primarily due to an increase of $5.7 million in clinical trial costs due to patient enrollment, the duration of patients on study, the enhancement of correlative studies, increase in site activity associated with Part C of the DisTinGuish study, and the expansion of the size of Part B of the DeFianCe study. There was also an increase of $0.6 million in manufacturing costs related to clinical trial material and manufacturing campaigns and an increase of $0.5 million in payroll and other related expenses due to an increase in headcount of our R&D full-time employees. General and administrative expenses were $3.4 million for the second quarter 2024, compared to $3.6 million for the same period in 2023. The decrease was due to a decrease of $0.3 million in professional fees associated with our business development activities, partially offset by a $0.1 million increase in payroll and other related expenses. Cash and cash equivalents totaled $78.5 million at June 30, 2024. About Leap Therapeutics Leap Therapeutics (Nasdaq: LPTX) is focused on developing targeted and immuno-oncology therapeutics. Leap's most advanced clinical candidate, DKN-01, is a humanized monoclonal antibody targeting the Dickkopf-1 (DKK1) protein. DKN-01 is being developed in patients with esophagogastric, gynecologic, and colorectal cancers. FL-301, is a humanized monoclonal antibody targeting Claudin18.2, being developed in patients with gastric and pancreatic cancer. Leap also has preclinical antibody programs targeting Claudin18.2/CD137 and GDF15. For more information about Leap Therapeutics, visit or view our public filings with the SEC that are available via EDGAR at or via . FORWARD-LOOKING STATEMENTS This press release contains forward-looking statements within the meaning of the federal securities laws. Such statements are based upon current plans, estimates and expectations of the management of Leap that are subject to various risks and uncertainties that could cause actual results to differ materially from such statements. The inclusion of forward-looking statements should not be regarded as a representation that such plans, estimates and expectations will be achieved. Words such as "anticipate," "expect," "project," "intend," "believe," "may," "will," "should," "plan," "could," "continue," "target," "contemplate," "estimate," "forecast," "guidance," "predict," "possible," "potential," "pursue," "likely," and words and terms of similar substance used in connection with any discussion of future plans, actions or events identify forward-looking statements. All statements, other than historical facts, including statements regarding the potential safety, efficacy, and regulatory and clinical progress of Leap's product candidates; the anticipated timing for completion of clinical trials and release of clinical trial data and the expectations surrounding the outcomes thereof; Leap's future clinical or preclinical product development plans for any of Leap's product candidates; Leap's estimations of projected cash runway; and any assumptions underlying any of the foregoing, are forward-looking statements. Important factors that could cause actual results to differ materially from Leap's plans, estimates or expectations could include, but are not limited to: (i) Leap's ability to successfully execute its clinical trials and the timing of enrollment in and cost of such clinical trials; (ii) the results of Leap's clinical trials and pre-clinical studies; (iii) Leap's ability to successfully enter into new strategic partnerships for DKN-01 or any of its other programs and to maintain its ongoing collaborations with BeiGene, NovaRock and Adimab; (iv) whether any Leap clinical trials and products will receive approval from the U.S. Food and Drug Administration or equivalent foreign regulatory agencies; and (v) exposure to inflation, currency rate and interest rate fluctuations, as well as fluctuations in the market price of Leap's traded securities. New risks and uncertainties may emerge from time to time, and it is not possible to predict all risks and uncertainties. No representations or warranties (expressed or implied) are made about the accuracy of any such forward-looking statements. Leap may not actually achieve the forecasts disclosed in such forward-looking statements, and you should not place undue reliance on such forward-looking statements. Such forward-looking statements are subject to a number of material risks and uncertainties including but not limited to those set forth under the caption "Risk Factors" in Leap's most recent Annual Report on Form 10-K filed with the SEC, as well as discussions of potential risks, uncertainties, and other important factors in its subsequent filings with the SEC. Any forward-looking statement speaks only as of the date on which it was made. Neither Leap, nor any of its affiliates, advisors or representatives, undertake any obligation to publicly update or revise any forward-looking statement, whether as a result of new information, future events or otherwise, except as required by law. These forward-looking statements should not be relied upon as representing Leap's views as of any date subsequent to the date hereof. CONTACT: Douglas E. Onsi President & Chief Executive Officer Leap Therapeutics, Inc. 617-714-0360 [email protected] Matthew DeYoung Investor Relations Argot Partners 212-600-1902 [email protected] SOURCE Leap Therapeutics, Inc.