Investor · MENLO PARK, CA

Douglas M. Haines, Jr

Open Douglas in the network graph →

Filings

20

SEC Form D

Connections

70

co-filers

Capital

—

across filings

Active

Nov 2021

to Dec 2025

Most-connected co-filers (70)

Stephen M. Henkenmeier · MENLO PARK, CA17 shared Marc T. Bala · MENLO PARK, CA13 shared William Chisholm · MENLO PARK, CA13 shared John T. Treadwell · MENLO PARK, CA11 shared Walter D. Narajowski · Austin, TX6 shared Abbot Apter · Duluth, MN6 shared Richard Ruggiero · Rockville, MD6 shared Matthew D. Malone · New York, NY6 shared Dennis S. Walters · Richland, WA6 shared Sterling Chapman · Baton Rogue, LA6 shared Weston Nichols · San Juan, Puerto Rico6 shared Mark Shadwick · Dublin 2, Ireland6 shared Chris Varin · Burlington, VT6 shared Lori S. White · Colchester, VT6 shared Jonathan A. Bloom · New York, NY5 shared Andrew Pierce · Sheridan, WY5 shared Jeffrey Saling · Reno, NV5 shared Mark C. Moore · Boston, MA5 shared Christopher Hentemann · New York, NY5 shared Peter Henn · Farmington Hills, MI5 shared Gregory D. Bonifield · Raleigh, NC5 shared 400 Capital GP LLC · New York, NY5 shared Christian J. Rottenkolber · Farmington Hills, MI5 shared Beth Seidenberg, M.D · Menlo Park, CA5 shared

Recent filings (20)

STG Allegro II-A, L.P.Dec 2025 · 14 co-filers STG Allegro II, L.P.Dec 2025 · 14 co-filers Whiteout Peak, L.P.Dec 2025 · 14 co-filers Nitrogen Aggregator, L.P.Nov 2025 · 14 co-filers Durare Aggregator, L.P.Aug 2025 · 14 co-filers Sensel, Inc.Jun 2024 · 20 co-filers$46.6M STG AV, L.P.Oct 2023 · 14 co-filers STG WARRIOR, L.P.Aug 2023 · 14 co-filers STG MERCURY, L.P.May 2023 · 14 co-filers STG VII EXECUTIVE FUND, L.P.Jan 2023 · 14 co-filers MSA Acceleration Partners B, L.P.Nov 2022 · 5 co-filers STG VII, L.P.Oct 2022 · 14 co-filers$3.0B STG VII-A, L.P.Oct 2022 · 14 co-filers$3.0B MSA Acceleration Partners, L.P.Jul 2022 · 5 co-filers UncommonX Inc.Nov 2021 · 13 co-filers Sensel, Inc.Nov 2021 · 14 co-filers$18.0M MSA Acceleration Partners B, L.P.Nov 2021 · 5 co-filers RocketDocs, Inc.Oct 2021 · 17 co-filers$1.5M RocketDocs, Inc.Jul 2021 · 17 co-filers$2.2M MSA Acceleration Partners, L.P.Jul 2021 · 5 co-filers

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