Investor · Hollis, NH

Mark Longtin

Open Mark in the network graph →

Filings

1

SEC Form D

Connections

4

co-filers

Capital

—

across filings

Active

Jan 2026

to Jan 2026

Most-connected co-filers (4)

Christopher Wong · Vancouver, British Columbia, Canada1 shared Sounion General Partner Llc · Wilmington, DE1 shared Pak Lui · London, United Kingdom1 shared Sounion Capital Management, Llc · Wilmington, DE1 shared

Recent filings (1)

Sounion PSI Master Fund LPJan 2026 · 4 co-filers

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