Kos Backs Fathom Therapeutics in Oversubscribed $55M Series A
New York – November 06, 2026 -- Kos Biotechnology Partners has invested in Fathom Therapeutics' oversubscribed $55 million Series A, which was led by Sutter Hill Ventures, to back a drug discovery platform that combines quantum chemistry, physics-based simulation and artificial intelligence.
Kos commits capital through its inaugural life sciences fund
The investment came through Kos BioVentures, the firm's first life sciences fund. Kos, based in New York and Athens, manages $125 million in assets. It invests across all development stages in therapeutic breakthroughs, biodefense and tech-enabled pharma services.