David Walt

David Walt is the Hansjorg Wyss Professor at Harvard Medical School and a co-founder of Illumina, Quanterix, and Sherlock Biosciences, one of the most consequential figures in modern diagnostics and life sciences tools. His angel pattern is exactly what his career predicts: diagnostics, life sciences tools, and biotech, with checks at $100k-$250k at pre-seed and seed. Boston-based. Best fit: scientifically rigorous founders coming out of Harvard, MIT, the Wyss Institute, or other top labs, building novel diagnostic platforms, single-molecule or multi-omics tools, or biotech infrastructure that requires deep technical credibility; bonus if you have a Walt-lab or Quanterix alumni connection already. Honest read: Walt is a senior academic and serial scientific co-founder, not a high-volume angel; he writes when he sees real science he cares about, and he is hard to reach cold. Entry path is via the Wyss Institute, Harvard’s tech transfer office, Quanterix or Sherlock alumni, or a warm intro from a respected scientific co-investor. AI is not his lane unless it serves a real measurement or instrumentation breakthrough. If your moat is software, look elsewhere; if your moat is novel chemistry, biology, or instrumentation, his check is one of the most credibility-conferring in diagnostics.