Robert Nelsen
Robert Nelsen is a co-founder and Managing Director of ARCH Venture Partners, a venture capital firm focused on early-stage technology and biotechnology companies. He has played a significant role in the financing and development of more than 150 companies, including over 50 that have reached valuations exceeding $1 billion, with notable investments in Illumina, Juno Therapeutics, Karuna Therapeutics, Altos Labs, and Xaira Therapeutics. He is known for backing disruptive platform technologies in healthcare and life sciences, and personally led the August 2026 funding round for Astromech, a predictive biology AI company spun out of Colossal Biosciences.
“Astromech, a developer of biology-forecasting AI models, raised a $20 million round led by Bob Nelsen at a $3.8 billion valuation.”
Source→“Astromech... Raised $20M at $3.8B valuation (up from $2B in March), $60M total. Bob Nelsen is named as the lead of the most recent Astromech raise”
Source→AI-extracted from podcast / newsletter / paper summaries. May contain errors.