Investor · Conifer, CO

Matthew Blumberg

Open Matthew in the network graph →

Filings

2

SEC Form D

Connections

17

co-filers

Capital

$20.5M

across filings

Active

Apr 2023

to Aug 2025

Most-connected co-filers (17)

Amy Adams · Portland, OR1 shared Roger T. Richer · Vancouver, British Columbia, Canada1 shared Wade H. Kenny · Grand Cayman, Cayman Islands1 shared Peter Holst · CONIFER, CO1 shared James Lusk · CONIFER, CO1 shared James M. Gill · Manchester, NH1 shared David M. Lang · Manchester, NH1 shared John Monagle · New York, NY1 shared Zachary Flood · Vancouver, British Columbia, Canada1 shared Douglas Johnston · Pittsburgh, PA1 shared Laura M. Rippy · Manchester, NH1 shared Errik M. Anderson · Manchester, NH1 shared Beth M. Obermiller · Manchester, NH1 shared Stephanie Gomez Cardoso · Bogota, Mauritius1 shared Deborah Meredith · Denver, CO1 shared David Clark · Salt Lake City, UT1 shared Michael Murphy · New York, NY1 shared

Recent filings (2)

Alumni Ventures Group LLCAug 2025 · 17 co-filers$25.0M Alumni Ventures Group LLCAug 2025 · 17 co-filers$25.0M Oblong, Inc.Apr 2023 · 9 co-filers$6.4M Oblong, Inc.Apr 2023 · 9 co-filers$6.4M

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