Investor · Tokyo, M0

Koichi Tsukui

Open Koichi in the network graph →

Filings

13

SEC Form D

Connections

152

co-filers

Capital

$55.9M

across filings

Active

Jan 2021

to Jan 2026

Most-connected co-filers (152)

Keith Hardwick · Tokyo, M012 shared Isao Sasaki · Tokyo, M010 shared Sayaka Sumida · Tokyo, M07 shared Ricky Sim · Tokyo, M07 shared Mpip Pooling Gp, Llc · St. Louis, MO6 shared Mercer Investments Llc · Boston, MA6 shared Brian Hecht · NEW YORK, NY5 shared Mpip Pooling Gp, Llc · St. Louis, MO5 shared Vijayabalan E. Murugesu · Grand Cayman, Cayman Islands5 shared Rich Nuzum · New York, NY5 shared Kouichi Nanba · Tokyo, M05 shared Mpip Pooling Gp, Llc · St. Louis, MO5 shared Jason Green · New York, NY5 shared Brian Miller · San Francisco, CA5 shared Robert C. Desmarais · BEDMINSTER, NJ5 shared Harry B. Leggat · St. Louis, MO5 shared Byran Dai · New York, NY5 shared Mercer Investments Llc · Boston, MA5 shared Colin Dean · Boston, MA5 shared Kristin E. Ferrer · St. Louis, MO5 shared Mark Dumas · Norfolk, VA4 shared Michael B. Schoenfeld · San Juan, Puerto Rico4 shared Michael Kamis · Calgary, Alberta, Canada4 shared Nicolas Ibanez · NEW YORK, NY4 shared

Recent filings (13)

PIP US Special LP Vehicle, LPJan 2026 · 6 co-filers ADVANTEST CORPAug 2025 · 100 co-filers PIP US Special LP Vehicle, LPJan 2025 · 19 co-filers ADVANTEST CORPSep 2024 · 97 co-filers$163.5M PIP US Special LP Vehicle, LPJan 2024 · 19 co-filers ADVANTEST CORPJun 2023 · 83 co-filers$115.3M PIP US Special LP Vehicle, LPJan 2023 · 19 co-filers ADVANTEST CORPJun 2022 · 83 co-filers$61.4M InflammX Therapeutics, Inc.May 2022 · 22 co-filers PIP US Special LP Vehicle, LPJan 2022 · 19 co-filers InflammX Therapeutics, Inc.Nov 2021 · 20 co-filers$8.4M PIP US Special LP Vehicle, LPJan 2021 · 18 co-filers InflammX Therapeutics, Inc.Jan 2021 · 17 co-filers$7.0M

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