Investor · SOUTH SAN FRANCISCO, CA

Matthew Porteus

Open Matthew in the network graph →

Filings

2

SEC Form D

Connections

13

co-filers

Capital

$155.7M

across filings

Active

Mar 2021

to Jun 2025

Most-connected co-filers (13)

Valentin Barsan · South San Francisco, CA1 shared Carlo Rizzuto · San Francisco, CA1 shared Ness Bermingham · South San Francisco, CA1 shared Raymond Kelleher · Houston, TX1 shared Maria Grazia Roncarolo · SOUTH SAN FRANCISCO, CA1 shared Joe Jimenez · SOUTH SAN FRANCISCO, CA1 shared Philip Gutry · SOUTH SAN FRANCISCO, CA1 shared Katherine Stultz · SOUTH SAN FRANCISCO, CA1 shared Josh Lehrer · SOUTH SAN FRANCISCO, CA1 shared Abraham Bassan · SOUTH SAN FRANCISCO, CA1 shared Perry A. Karsen · South San Francisco, CA1 shared Carlo Rizzuto · New York, NY1 shared Jerel Davis · Cleveland, OH1 shared

Recent filings (2)

Kamau Therapeutics, Inc.Jun 2025 · 7 co-filers$10.0M Kamau Therapeutics, Inc.Jun 2025 · 7 co-filers$10.0M Graphite Bio, Inc.Mar 2021 · 19 co-filers$150.7M Graphite Bio, Inc.Mar 2021 · 19 co-filers$150.7M

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