Sutro Biopharma Announces Operational Restructuring Intended to Extend Cash Runway through Key Milestones

– Extends cash runway into at least mid-2027 –

SOUTH SAN FRANCISCO, Calif., Sept. 29, 2025 (GLOBE NEWSWIRE) -- Sutro Biopharma, Inc. (Sutro or the Company) (NASDAQ: STRO), an oncology company pioneering site-specific and novel-format antibody drug conjugates (ADCs), today announced an organizational restructuring to prioritize the advancement of its three ADC programs and research and development collaborations. The restructuring, along with certain expected near-term milestone payments, is expected to extend the Company’s runway into at least mid-2027, after the planned announcement of initial clinical data from STRO-004, its next-generation Tissue Factor-targeting exatecan ADC, and the initiation of clinical studies for at least one of Sutro’s additional ADC programs. This restructuring will result in a planned workforce reduction of approximately one-third of employees.

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