People · Operator

Irving Weissman

Named in public records as an officer, director or promoter · active 2015–2025 · Pharmaceuticals, Pharma

2
Companies
4
Filings
$208.9M
Combined raised · real
Serial
Operator type
Companies
CompanyRoleSectorStageRaised · realValue · estTied
Forty Seven, Inc.PharmaceuticalsSeries C$109.1M$2.6B2015
Pheast Therapeutics, Inc.PharmaSeries C$99.8M$138.6M2022
Operator network

Irving Weissman at the center, the companies they're named on, and every other operator named alongside them — an interlock map of shared founding teams, boards and funds. Name-matched, so treat as a research lead.

Jonathan MacQuitty · 7 companies · 1 sharedJonathan MacQuittyChristopher Schaepe · 6 companies · 1 sharedChristopher Schae…DENNIS HENNER · 5 companies · 1 sharedDENNIS HENNEREric Jensen · 5 companies · 1 sharedEric JensenJeffrey Bird · 5 companies · 1 sharedJeffrey BirdMark A. McCamish · 2 companies · 1 sharedMark A. McCamishChris A. Schaepe · 1 companies · 1 sharedChris A. SchaepeDennis A. Henner · 1 companies · 1 sharedDennis A. HennerIrving A. Weissman · 1 companies · 1 sharedIrving A. WeissmanJeffrey A. Bird · 1 companies · 1 sharedJeffrey A. BirdJonathan A. MacQuitty · 1 companies · 1 sharedJonathan A. MacQu…Ravindra A. Majeti · 1 companies · 1 sharedRavindra A. MajetiRavindra Majeti · 1 companies · 1 sharedRavindra MajetiSteven Gillis · 23 companies · 1 sharedSteven GillisJacob Vogelstein · 2 companies · 1 sharedJacob VogelsteinAmira Barkal · 1 companies · 1 sharedAmira BarkalRaphael Rousseau · 1 companies · 1 sharedRaphael RousseauRoy Maute · 1 companies · 1 sharedRoy MauteThomas Marty · 1 companies · 1 sharedThomas MartyForty Seven, Inc. · $109.1M raisedForty Seven, Inc.Pheast Therapeutics, Inc. · $99.8M raisedPheast Therapeutics, …Irving WeissmanIW
Irving Weissman Company Co-operator (ring = serial)Hover to isolate ties · click to open
Co-operators (shared boards)

People named alongside Irving Weissman on the same companies — an interlock signal (shared founding team, board, or fund). Name-matched, so verify before acting.

OperatorSharedTheir companies
Steven Gillis123
Jonathan MacQuitty17
Christopher Schaepe16
DENNIS HENNER15
Jeffrey Bird15
Eric Jensen15
Jacob Vogelstein12
Mark A. McCamish12
Raphael Rousseau11
Ravindra Majeti11
Amira Barkal11
Thomas Marty11
Jonathan A. MacQuitty11
Ravindra A. Majeti11
Chris A. Schaepe11
Irving A. Weissman11
Dennis A. Henner11
Jeffrey A. Bird11
Roy Maute11

People are matched by normalized name across records; a common name may merge distinct individuals. Treat as a research lead, the same way modeled valuations are directional, not quoted.