Investor · Wynnewood, PA

William A. Siegenthaler

Open William in the network graph →

Filings

4

SEC Form D

Connections

16

co-filers

Capital

—

across filings

Active

Oct 2008

to Jul 2025

Most-connected co-filers (16)

Mark I. Solomon · Wynnewood, PA2 shared William A. Landman · Wynnewood, PA2 shared Richard A. Mitchell · Wynnewood, PA2 shared James J. Walker · NEW YORK, NY2 shared Lungile Tshuma · San Antonio, TX2 shared Timothy Brandt · Denver, CO2 shared Moses Ng'Ang'A · Puyallup, WA2 shared Paul Silberberg · Wynnewood, PA2 shared Ingrid R. Welch · Wynnewood, PA2 shared Steve Burrill · South San Francisco, CA2 shared Edwin Madison · South San Francisco, CA2 shared Douglas Lewis · New York, NY2 shared G. P. Ferguson · Dallas, TX2 shared DaneVest Tech Fund Advisors, LLC · Middleton, WI2 shared Co-Manager of General Partner DaneVest Capital LLC · Middleton, WI2 shared Co-Manager of General Partner H Venture Mgt, LLC · Waunakee, WI2 shared

Recent filings (4)

Knowledgeable AI, Inc.Jul 2025 · 8 co-filers$75K Knowledgeable AI, Inc.Jul 2025 · 8 co-filers$50K CMS 2008 Investment Partners PE, L.P.Oct 2008 · 11 co-filers$500K CMS 2008 Investment Partners PE-Q, L.P.Oct 2008 · 11 co-filers$500K

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