DKKL1

CAMBRIDGE, Mass., March 18, 2024 /PRNewswire/ -- Leap Therapeutics, Inc. (Nasdaq:LPTX), a biotechnology company focused on developing targeted and immuno-oncology therapeutics, today reported financial results for the fourth quarter and year ended December 31, 2023. Leap Highlights: Presented new clinical data from Part A of the Phase 2 DeFianCe study evaluating DKN-01 in combination with standard of care bevacizumab and chemotherapy in second-line patients with advanced colorectal cancer, at the 2024 ASCO Gastrointestinal Cancers Symposium Completed enrollment in the randomized controlled Part C of the Phase 2 DisTinGuish study evaluating DKN-01 in combination with tislelizumab and chemotherapy in patients with advanced gastroesophageal junction and gastric cancer "As we reflect on the fourth quarter and the achievements of the past year, we are proud of the strides we've made in advancing DKN-01 and integrating our pipeline of earlier stage biomarker-targeted antibody therapies. The data from Part A of the DeFianCe study, demonstrating a 30% overall response rate and a 93% disease control rate in second-line colorectal cancer patients, showcases a strong foundation as we move into the randomized controlled Part B of the study," said Douglas E. Onsi, President and Chief Executive Officer of Leap. "Additionally, the completion of enrollment in Part C of the DisTinGuish study in first-line gastroesophageal junction and gastric cancer patients positions us to deliver the first randomized controlled data for DKN-01 starting in the middle of the year. As we look ahead to a data rich 2024, we remain focused on our mission to deliver new personalized medicines to patients fighting against cancer." DKN-01 Development Update Presented initial clinical data from Part A of the DeFianCe Study of DKN-01 plus bevacizumab and chemotherapy in colorectal cancer (CRC) patients. The Company presented initial data from Part A of the DeFianCe study (NCT05480306), a Phase 2 study evaluating DKN-01 in combination with standard of care (SOC) bevacizumab and chemotherapy in second-line (2L) patients with advanced microsatellite stable (MSS) CRC patients at the 2024 American Society of Clinical Oncology (ASCO) Gastrointestinal Cancers Symposium, held in San Francisco on January 18-20, 2024 and during the Company's conference call on January 23, 2024. Key Findings: As of the December 6, 2023 data cutoff, across all patients enrolled (n=33): Overall response rate (ORR) among response-evaluable patients (n=27) was 30% and disease control rate (DCR) was 93%, including 8 partial responses (PR) and 17 patients with a best response of stable disease (SD) Median progression-free survival (PFS) was 6.3 months 9 patients remained on therapy and were beyond 8.5 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 33% ORR and 100% DCR in response-evaluable population (7 PRs, 14 SDs) Preliminary median PFS of 8.6 months (9 patients continuing therapy within subgroup) Compelling ORR, DCR and PFS in patients with rectal/rectosigmoid carcinomas (n=15), a population with increasing incidence among young people and shown to have the highest DKK1 levels: 46% ORR and 100% DCR in response-evaluable population (6 PRs, 7 SDs) Preliminary median PFS of 9.4 months (6 patients continuing therapy within subgroup) Higher baseline plasma DKK1 levels correlated with improved responses DKN-01 plus bevacizumab and chemotherapy was well-tolerated, with a majority of DKN-01 related events being low grade (Grade 1/2) The Company expects the 130 patient randomized controlled Part B to complete enrollment in mid-2024. As of March 15, 2024, 80 patients have enrolled in Part B. Announced completion of enrollment in the randomized controlled Part C of the DisTinGuish study evaluating DKN-01 in combination with tislelizumab, BeiGene's anti-PD-1 antibody, and chemotherapy in patients with advanced gastroesophageal junction and gastric cancer. Part C of 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 patients with advanced gastroesophageal adenocarcinoma. Part C enrolled 170 first-line, HER2-negative patients randomized 1:1 to evaluate DKN-01 in combination with tislelizumab and SOC chemotherapy, compared to tislelizumab and SOC chemotherapy alone. The primary objective is progression-free survival (PFS) in DKK1-high and in all patients. Secondary objectives of Part C include overall survival and objective response rate as measured by RECIST v1.1 in DKK1-high and in all patients. The Company expects to report initial data from Part C of the DisTinGuish study in mid-2024. Selected Year-End and Fourth Quarter 2023 Financial Results Net Loss was $81.4 million for the year ended December 31, 2023, compared to $54.6 million for the year ended December 31, 2022. The increase was due to in-process research and development acquired in the Flame merger which was expensed during the year ended December 31, 2023, costs incurred in connection with our research and development programs, and from general and administrative costs associated with our operations. Research and development expenses were $73.2 million for the full year 2023, compared to $45.0 million for the same period in 2022. Research and development expenses were $11.7 million for the fourth quarter ended 2023, compared to $11.0 million for the same period in 2022. The increases for the full year 2023 were primarily due to in-process research and development acquired in the Flame merger, an increase in clinical trial costs, and an increase in payroll and other related expenses due to an increase in headcount of research and development full-time employees. General and administrative expenses were $13.8 million for the full year 2023, compared to $11.8 million for the same period in 2022. General and administrative expenses were $3.1 million for the fourth quarter ended 2023, compared to $2.9 million for the same period in 2022. The increases for the full year 2023 were primarily due to costs associated with our business development activities and an increase in payroll and other related expenses due to an increase in headcount of general and administrative full-time employees. Cash and cash equivalents totaled $70.6 million at December 31, 2023. Research and development incentive receivables totaled $0.8 million at December 31, 2023. 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; (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.

30% ORR and 93% DCR across heterogenous second-line CRC patients treated with DKN-01 plus bevacizumab and chemotherapy Subgroup analysis reveals greatest benefit in left-sided tumors, particularly rectal and rectosigmoid patients with 46% ORR, 100% DCR, and preliminary median PFS of 9.4 months. Leap to host conference call to report additional clinical data including further subgroup analyses on Tuesday, January 23, 2024 at 8:30 a.m. ET CAMBRIDGE, Mass., Jan. 16, 2024 /PRNewswire/ -- Leap Therapeutics, Inc. (Nasdaq:LPTX), a biotechnology company focused on developing targeted and immuno-oncology therapeutics, today announced new data from Part A of the DeFianCe study, a Phase 2 study evaluating DKN-01, Leap's anti-Dickkopf-1 (DKK1) antibody, in combination with standard of care bevacizumab and chemotherapy in second-line patients with advanced colorectal cancer (CRC), to be presented at the upcoming 2024 American Society of Clinical Oncology (ASCO) Gastrointestinal Cancers Symposium taking place in San Francisco, CA and virtually on January 18-20, 2024. "Data from Part A of the DeFianCe study demonstrates that the addition of DKN-01 to bevacizumab and chemotherapy can generate clinically meaningful response rates and durable tumor reductions with a favorable safety profile in second-line CRC patients, particularly those with rectal or rectosigmoid tumors," said Meredith Pelster, MD, Assistant Director of Gastrointestinal Research at Sarah Cannon Research Institute and a study investigator. "We are very interested in utilizing DKN-01 to modulate the Wnt pathway, which is active in a high percentage of CRC patients, particularly left-sided tumors, to overcome resistance to chemotherapy, and to decrease angiogenesis in order to enhance the activity of the standard of care bevacizumab plus chemotherapy regimens. These results provide a strong foundation for the randomized controlled Part B of this study, which is enrolling extremely well and expected to complete enrollment mid-year." "In this heterogenous second-line population with several unfavorable characteristics, the DKN-01 plus bevacizumab and chemotherapy Part A ORR of 30%, with a disease control rate of over 90%, and enhanced activity in left-sided tumors and rectal tumors, with a 46% ORR and 9.4 month preliminary PFS, represent an encouraging efficacy signal," said Zev Wainberg, MD, Professor of Medicine and Co-Director of the GI Oncology Program at UCLA. "CRC is a heterogenous disease where the selection of therapy and expected outcomes vary based on whether the tumor is on the left or right side, the presence or absence of genetic mutations, microsatellite instability, and prior therapy. Physicians want to be able to select a second-line therapy combination based on the patient's personalized tumor characteristics, which is what we hope to achieve by adding DKN-01 and understanding the subgroups with the greatest clinical benefit." Leap will host a conference call on January 23, 2024 at 8:30 a.m. Eastern Time in which Dr. Pelster and Dr. Wainberg will further discuss the new data from the DeFianCe study. Key Findings: As of the December 6, 2023 data cutoff, 33 patients enrolled in Part A of the DeFianCe study Across all evaluable patients with second-line microsatellite stable CRC (n=27): Objective response rate (ORR) was 30% and disease control rate (DCR) was 93%, including 8 partial responses (PR) and 17 patients with a best response of stable disease (SD) Median progression-free survival (PFS) was 6.3 months 9 patients remain on therapy beyond 8.5 months Analysis revealed a breadth of clinical activity across additional subgroups, including patients with left-sided tumors (n=25) 33% ORR and 100% DCR in response-evaluable population (7 PRs, 14 SDs) Preliminary median PFS of 8.6 months (9 patients continuing on therapy within subgroup) Patients with rectal/rectosigmoid carcinomas (n=15) represent an important subpopulation: 46% ORR and 100% DCR in response-evaluable population (6 PRs, 7 SDs) Preliminary median PFS of 9.4 months (6 patients continuing on therapy within subgroup) Higher baseline plasma DKK1 levels correlated with improved responses DKN-01 plus bevacizumab and chemotherapy was well-tolerated, with a majority of DKN-01 related events being low grade (Grade 1/2) Randomized controlled Part B of the study is underway with 54 patients currently enrolled Conference Call: Leap's management team, together with Dr. Pelster and Dr. Wainberg, will host a conference call on Tuesday, January 23, 2024 at 8:30 a.m. Eastern Time to further discuss the data. The conference call will be broadcast live in listen-only mode and can be accessed via the website URL: . A replay of the event will also be available for a limited time on the Investors page of the Company's website at . About the DeFianCe Study 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. The Part A cohort enrolled 33 patients, including significant numbers of patients who had early progression on first-line therapy, previous exposure to bevacizumab, tumors with Ras mutations, or liver metastases. The study has expanded into a 130-patient Part B randomized controlled trial. The primary objective of the study is progression free survival. Secondary objectives include overall 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. 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. All statements, other than historical facts, including statements regarding the anticipated timing for completion of or success of enrollment in the DeFianCe study or any other clinical trial, the release of clinical data, and any outcomes of such trials; the potential, safety, efficacy, and regulatory and clinical progress of Leap's product candidates, including DKN-01; 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; (iv) whether any Leap clinical trials and 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.

CAMBRIDGE, Mass., Jan. 3, 2024 /PRNewswire/ -- Leap Therapeutics, Inc. (Nasdaq:LPTX), a biotechnology company focused on developing targeted and immuno-oncology therapeutics, today announced that Douglas E. Onsi, President and Chief Executive Officer, will present a corporate overview at the 42nd Annual J.P. Morgan Healthcare Conference in San Francisco, CA. Leap Presentation Details: 42nd Annual J.P. Morgan Healthcare Conference Date: Wednesday, January 10, 2024 Time: 1:30 p.m. Pacific Time A live webcast of the presentation may be accessed on the Investors page of the company's website at , where a replay of the events will also be available for a limited time. 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 . 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.