Sutro Biopharma Announces Strategic Portfolio Review Resulting in the Prioritization of its Next-Generation ADC Pipeline

Core Insights - Sutro Biopharma is prioritizing its next-generation exatecan and dual-payload ADC programs while deprioritizing the development of luvelta, seeking a partner for its further development [1][2][3] - The company expects to file three INDs for its wholly-owned programs over the next three years, starting with STRO-004, a novel Tissue Factor ADC, anticipated to enter clinical trials in the second half of 2025 [1][6] - Jane Chung has been appointed as the new CEO, succeeding Bill Newell, who will remain available in an advisory role during the transition [4][5] Pipeline Priorities - The lead program is STRO-004, focusing on solid tumors, with an IND submission planned for the second half of 2025 [6] - Sutro is also advancing STRO-006, an integrin beta-6 ADC, expected to enter clinical development in 2026, and a dual-payload ADC program with an IND anticipated in 2027 [13] Organizational Changes - The company will reduce its headcount by nearly 50% as part of its restructuring efforts, with changes expected to be substantially complete by the end of 2025 [3][13] - Sutro plans to exit its internal GMP manufacturing facility by year-end 2025, having established external manufacturing capabilities [3][13] Financial Overview - As of December 31, 2024, Sutro reported cash, cash equivalents, and marketable securities totaling $316.9 million, providing a cash runway expected to last into at least Q4 2026, excluding anticipated milestones from existing collaborations [3][13] - The restructuring is estimated to incur cash payments of$40 to $45 million, but is expected to lead to significant cost reductions [13] Strategic Collaborations - Sutro remains committed to its existing collaborations, which have the potential to generate up to$2 billion in milestone payments, in addition to royalties [5][13]