People

Alexander Singh

Alexander Singh is a Yosemite investor, confirmed by his own2026 full-time joining announcement and Lauren Cantor Wright’s welcome to the healthcare investment team. He previously cofounded Alfie Health, developed an agentic clinical decision-support platform and participated in its acquisition by knownwell, and invested alongside Pioneer Fund. He focuses on deploying AI in real clinical workflows and cancer treatment/care. His public professional profile identifies Alfie as a Y Combinator W22 company; exact Yosemite start day and partner/principal rank are unpublished.