Investor · Ann Arbor, MI

John Brooks

Open John in the network graph →

Filings

43

SEC Form D

Connections

165

co-filers

Capital

$9.4M

across filings

Active

May 2009

to Feb 2026

Most-connected co-filers (165)

Charles Mulligan · ITHACA, NY14 shared Charles Bisgaier · Northville, MI13 shared James M. Searcy · Boulder, CO13 shared John Page · CHICAGO, IL13 shared Eran Bashan · Livonia, MI13 shared Jason R. Gilboy · Chicago, IL13 shared Krish S. Krishnan · Germantown, MD13 shared Jeffrey A. Coopersmith · Columbus, OH11 shared Benjamin J. Horn · Columbus, OH11 shared Core Real Estate Capital LLC · Columbus, OH11 shared Ramu Veerappan · Piscataway, NJ7 shared Purnanand Sarma · Exton, PA5 shared Sanjay Swani · Ponte Vedra Beach, FL5 shared Nathan Ferguson · Oakland, CA5 shared Ron Gershoni · Oakland, CA5 shared Mark Willis · Ann Arbor, MI4 shared Mark Hirschhorn · Purchase, NY4 shared John L. Ailanjian · Redwood City, CA4 shared Xinyu Chen · Belmont, CA4 shared Sanjay Tolia · Manhattan Beach, CA4 shared Seed InvestCo, LLC · Atlanta, GA4 shared Catherine Vassallo · London, United Kingdom3 shared Kris Anderson · Culver City, CA3 shared Luke Graham · Roswell, GA3 shared

Recent filings (43)

Sernova Biotherapeutics Inc.Feb 2026 · 8 co-filers$843K Alertgy Inc.Dec 2023 · 7 co-filers Alertgy Inc.Dec 2023 · 7 co-filers Zion Ventures LLCApr 2023 · 9 co-filers Zion Ventures LLCApr 2023 · 9 co-filers High QA, Inc.Feb 2023 · 13 co-filers$2.1M HYGIEIA INCFeb 2023 · 10 co-filers$5.0M HYGIEIA INCFeb 2023 · 10 co-filers$5.0M Lemurian, Inc.Sep 2022 · 11 co-filers$20.0M HYGIEIA INCDec 2021 · 11 co-filers$5.8M Lemurian, Inc.Oct 2021 · 11 co-filers$2.0M Lemurian, Inc.Oct 2021 · 11 co-filers$10.7M HYGIEIA INCAug 2021 · 11 co-filers$3.0M CorLife LtdMay 2021 · 8 co-filers$250K Finxact, Inc.Feb 2021 · 15 co-filers$51.0M HYGIEIA INCJan 2021 · 10 co-filers$2.0M HYGIEIA INCSep 2020 · 8 co-filers$1.7M Lemurian, Inc.Jan 2020 · 11 co-filers$217K HYGIEIA INCNov 2019 · 8 co-filers$2.5M CORE PROSCENIUM APARTMENTS LLCAug 2019 · 1 co-filer$7.7M Core BD Hyde Park LLCJun 2019 · 8 co-filers$8.7M Core BD Hyde Park LLCJun 2019 · 8 co-filers$7.7M Core BD Carmel Woods LLCJan 2019 · 8 co-filers$7.1M Finxact, Inc.Jan 2019 · 11 co-filers$30.0M High QA, Inc.Jan 2019 · 19 co-filers$2.5M

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