Summary of Compass Therapeutics FY Conference Call Company Overview - **Company**: Compass Therapeutics - **Industry**: Biotechnology, specifically focused on monoclonal antibody discovery and development in oncology - **Location**: Boston - **Current Pipeline**: Three drugs in clinical trials, with a fourth drug about to enter the clinic [2][3] Key Points and Arguments Upcoming Milestones - **Tevesemig**: A DLL4 VEGF-A bispecific antibody with a readout on secondary endpoints of progression-free survival (PFS) and overall survival (OS) expected by the end of Q1 2026 [2][3] - **PD-1, PD-L1 Bispecific Antibody**: Observed three responses in the first 15 patients treated in a phase 1 clinical trial, with cohort expansions planned for triple-negative breast cancer and non-small cell lung cancer [2][3][31] - **Fourth Drug**: A novel PD-1 VEGF-A bispecific antibody entering the clinic at the beginning of 2026 [3][4] Clinical Trial Insights - **Tevesemig Efficacy**: In a randomized study, the response rate in the combination arm (including Tevesemig) was more than triple that of the control arm, with a significant reduction in progressive disease incidence (42% in control vs. 16% in combination arm) [5][6][9] - **Survival Data**: Observations indicate fewer deaths than projected, suggesting improved overall survival [7][9][10] Market Opportunity - **Biliary Tract Cancer (BTC)**: Approximately 25,000 patients diagnosed annually in the U.S., with an estimated 15,000 patients eligible for second-line therapy, representing a multi-billion-dollar commercial opportunity [11][14] - **Duration of Therapy**: Current second-line chemotherapy duration is low single-digit months, while Tevesemig showed a median PFS of 9.4 months in a phase 2 study [12][14] Expansion Plans - **Frontline Studies**: Ongoing studies at MD Anderson to evaluate Tevesemig in combination with existing regimens, potentially increasing patient numbers by 50% [15][17] - **Additional Indications**: DLL4 expression is enriched in various malignancies, including hepatocellular, gastric, ovarian, renal cell, and colorectal cancers, indicating further expansion potential [17][18] Commercial Readiness - **Manufacturing Capability**: Compass has developed a robust commercial-ready manufacturing process for Tevesemig [20][21] - **Prescriber Awareness**: Initial pre-commercial work has begun, with plans for a full commercial launch preparation for a potential 2027 launch [20][21] Unique Mechanisms - **PD-1, PD-L1 Bispecific Antibody (8371)**: Utilizes a novel technology called StitchMabs, allowing for unique mechanisms of action, including T cell engagement and PD-1 cleavage [22][25] - **Differentiation**: The drug is positioned to have better PD-1 blockade compared to other molecules in development, with a focus on its unique mechanism [33][34] Other Important Insights - **Clinical Observations**: Notable responses in patients previously treated with other therapies, indicating potential for significant clinical impact [31] - **Future Indications**: Plans to explore additional indications for the PD-1 VEGF bispecific, including gastric cancer, hepatocellular, renal cell, and endometrial cancer [34] This summary encapsulates the critical insights and future directions for Compass Therapeutics as discussed in the conference call.