Investor · Mountain View, CA

William Weldon

Open William in the network graph →

Filings

10

SEC Form D

Connections

68

co-filers

Capital

$314.2M

across filings

Active

Mar 2022

to Mar 2026

Most-connected co-filers (68)

John Farquhar · Mountain View, CA5 shared Tadd M. Miller · Indianapolis, IN5 shared Julie E. Cullivan · Alameda, CA5 shared Napoleon N. Ta · San Francisco, CA4 shared StemPoint Capital LP · New York, NY4 shared Peter N. Thiel · San Francisco, CA4 shared Benjamin Norment · Charlotte, NC4 shared Adam S. Korn · Dallas, TX3 shared Mary Santos · St Peter Port, Y73 shared Zachary Z. Alschuler · New York, NY3 shared Trae N. Stephens · San Francisco, CA3 shared Chris Mcerlane · St Peter Port, Y73 shared Timothy Barabe · Fort Lauderdale, FL3 shared Jeffrey C. Lightcap · Lewisville, TX3 shared Casey D. Tansey · Menlo Park, CA3 shared Nicholas Downing · Mountain View, CA3 shared Keith L. Grayson Ii · PHOENIX, AZ3 shared Mike C. Bosner · New York, NY3 shared Tony S. Florence · New York, NY3 shared Charles Taylor · Mountain View, CA3 shared Lonnie Smith · Mountain View, CA3 shared Wayne Riley · Mountain View, CA3 shared Stephane L. Lachance · Grand Cayman, Cayman Islands3 shared Brendan C. O'Reilly · Los Angeles, CA3 shared

Recent filings (10)

Founders Fund Growth IV, LPMar 2026 · 4 co-filers$6.0B Founders Fund IX, LPOct 2025 · 11 co-filers$971.6M Founders Fund Growth III, LPApr 2025 · 11 co-filers$4.6B HeartFlow Holding, Inc.Apr 2025 · 32 co-filers$50.0M HeartFlow Holding, Inc.Feb 2025 · 32 co-filers$75.0M HeartFlow Holding, Inc.Apr 2023 · 31 co-filers$215.9M Founders Fund IX, LPApr 2023 · 15 co-filers$675.0M Founders Fund Growth II, LPMar 2022 · 12 co-filers$3.4B RealConnex Holdings Inc.Mar 2022 · 11 co-filers$1.0M RealConnex Holdings Inc.Mar 2022 · 11 co-filers$1.0M

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