IO Biotech Provides Update Following Pre-BLA Meeting with FDA

Core Viewpoint - IO Biotech's Cylembio (imsapepimut and etimupepimut) will not proceed with a Biologics License Application (BLA) based on the current clinical trial data, as recommended by the FDA, despite showing improved progression-free survival (PFS) in the IOB-013 trial [1][6] Regulatory Update - The FDA advised against submitting a BLA for Cylembio based on IOB-013 trial data, which narrowly missed statistical significance for PFS [1][6] - IO Biotech plans to engage in further discussions with the FDA to design a new registrational study for Cylembio [2][6] Clinical Trials - Cylembio is currently being evaluated in multiple clinical trials, including a pivotal Phase 3 trial (IOB-013/KN-D18) in combination with Merck's KEYTRUDA (pembrolizumab) for advanced melanoma [3][5] - The IOB-013 trial enrolled 407 patients across over 100 centers globally, with topline results reported in Q3 2025 [5][7] Financial and Operational Strategy - The company is implementing a restructuring plan to conserve capital, which includes a workforce reduction of approximately 50% and expects a non-recurring charge of $1.0 - $1.5 million in Q3 2025 [2][6] - IO Biotech has sufficient capital to sustain operations into Q1 2026 while pursuing regulatory approval for Cylembio [2] Company Overview - IO Biotech is a clinical-stage biopharmaceutical company focused on developing immune-modulatory, off-the-shelf therapeutic cancer vaccines using its T-win platform [8]