Investor · South San Francisco, CA

Valentin Barsan

Open Valentin in the network graph →

Filings

9

SEC Form D

Connections

64

co-filers

Capital

$546.2M

across filings

Active

Sep 2011

to Sep 2024

Most-connected co-filers (64)

Matthew K. Fust · Menlo Park, CA8 shared Margaret Nibbi · South San Francisco, CA7 shared Kenneth Drazan · South San Francisco, CA6 shared Adham Sbeih · Sacramento, CA4 shared Sheryl C. Dhillon · Vancouver, British Columbia, Canada4 shared David F. Roth · Vancouver, British Columbia, Canada4 shared Beth Seidenberg · San Francisco, CA4 shared Russell Perkins · Phoenix, AZ4 shared Vinod M. Khosla · Menlo Park, CA3 shared Annette Bianchi · SAN BRUNO, CA3 shared Mitchell E. Cantor · Mill Valley, CA2 shared Joellyn W. Shannon · Nashville, TN2 shared Chris W. Conk · Nashville, TN2 shared Edward T. Schafer · Crestone, CO2 shared Andrew Jenkinson · New York, NY2 shared Jon A. Northrop · Crestone, CO2 shared Reuben Garbett · Phoenix, AZ2 shared Glenn W. Preston · Nashville, TN2 shared Jeffrey M. Tezak · Lincoln, NE2 shared Brian J. Maas · Nashville, TN2 shared Brook Byers · MENLO PARK, CA2 shared Sean Parker · South San Francisco, CA2 shared Patricia J. Coronado · Mill Valley, CA2 shared Frank Saltiel · San Jose, CA2 shared

Recent filings (9)

Kamau Therapeutics, Inc.Jun 2025 · 7 co-filers$10.0M Kamau Therapeutics, Inc.Jun 2025 · 7 co-filers$10.0M Arsenal Biosciences, Inc.Sep 2024 · 21 co-filers$325.4M Arsenal Biosciences, Inc.Sep 2022 · 20 co-filers$230.8M Montecito Medical Physicians III Limited PartnershipMar 2022 · 15 co-filers Montecito Two Rivers Fund, LLCMay 2021 · 13 co-filers$29.5M Square, Inc.May 2021 · 34 co-filers$10.7M Square, Inc.Dec 2011 · 13 co-filers$103.0M Square, Inc.Sep 2011 · 13 co-filers$100.0M Square, Inc.Sep 2011 · 11 co-filers$31.7M

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