SG

Steve Gillis

VC

Managing Director, ARCH Venture Partners

Immunologist founder turned deep biotech investor

Seattle, WA3 notable investments
Pre-SeedSeedSeries A
BioHealthcare

Background

Steve Gillis, PhD, is a Managing Director at ARCH Venture Partners, joining as a Venture Partner in 2005 and becoming a Managing Director in 2006. An immunologist by training with over 300 peer-reviewed publications, he co-founded Immunex Corp. (Washington's most successful venture-funded biotech) and Corixa Corp. (acquired by GlaxoSmithKline in 2005). He holds a BA from Williams College and a PhD from Dartmouth College. He currently chairs and leads boards of numerous ARCH portfolio companies in oncology and immunology.

Investment Thesis

Building life science companies at the frontier of immunology, oncology, and cell therapy based on validated mechanisms.

Investment Focus

Stages

Pre-SeedSeedSeries A

Sectors

BioHealthcare

Based in: Seattle, WA (North America)

Notable Investments

Last updated: Jun 11, 2026