Investor · Palo Alto, CA

Irving Weissman

Open Irving in the network graph →

Filings

5

SEC Form D

Connections

13

co-filers

Capital

$159.2M

across filings

Active

Mar 2016

to Oct 2025

Most-connected co-filers (13)

Amira Barkal · Palo Alto, CA3 shared Steven Gillis · Lexington, MA3 shared Jacob Vogelstein · Baltimore, MD3 shared Dennis Henner · Cambridge, MA2 shared Roy Maute · Redwood City, CA2 shared Ravindra A. Majeti · Menlo Park, CA2 shared Jeffrey Bird · Palo Alto, CA2 shared Jonathan Macquitty · London, United Kingdom2 shared Christopher J. Schaepe · Menlo Park, CA2 shared Raphael Rousseau · Redwood City, CA1 shared Thomas Marty · Redwood City, CA1 shared Mark A. Mccamish · Menlo Park, CA1 shared Eric Jensen · Berwyn, PA1 shared

Recent filings (5)

Pheast Therapeutics, Inc.Oct 2025 · 13 co-filers$40.0M Pheast Therapeutics, Inc.Oct 2025 · 13 co-filers$40.0M Pheast Therapeutics, Inc.Apr 2025 · 9 co-filers$75.3M Pheast Therapeutics, Inc.Apr 2025 · 9 co-filers$75.3M Pheast Therapeutics, Inc.Oct 2022 · 7 co-filers$75.3M Pheast Therapeutics, Inc.Oct 2022 · 7 co-filers$75.3M Forty Seven, Inc.Oct 2017 · 13 co-filers$75.0M Forty Seven, Inc.Oct 2017 · 13 co-filers$75.0M Forty Seven, Inc.Mar 2016 · 13 co-filers$74.8M Forty Seven, Inc.Mar 2016 · 13 co-filers$74.8M

Derived from public SEC Form D (Reg D) filings; entities resolved probabilistically. See Irving in the interactive graph →