Investor · Chicago, IL

William J. Shimanek

Open William in the network graph →

Filings

8

SEC Form D

Connections

24

co-filers

Capital

—

across filings

Active

Mar 2009

to Feb 2026

Most-connected co-filers (24)

James W. Backner · Camarillo, CA5 shared Chris C. Perz · Chicago, IL5 shared J. T. Raymond · Cheyenne, WY5 shared Mike S. Kmetz · Cheyenne, WY5 shared Jeffrey Barnes · Saddle Brook, NJ5 shared Hydie H. Mcalister · Houston, TX5 shared Castle Creek Partners, Llc · Chicago, IL5 shared Castle Creek Partners, Llc · Chicago, IL5 shared Brian G. Lancaster · BERKELEY, CA2 shared Lee Wrubel, M.D · Rowayton, CT2 shared Raymond A. Muzyka · Colorado Springs, CO1 shared Robert Proznik · Edmonton, Alberta, Canada1 shared Castle Creek Arbitrage, Llc · Chicago, IL1 shared Castle Creek Arbitrage, Llc · Chicago, IL1 shared Jonathan Teaford · Boulder, CO1 shared Allan D. Weine · Chicago, IL1 shared Peter C. Fletcher · Chicago, IL1 shared Paul C. Janowitz · Chicago, IL1 shared Robert J. Conrads · SAN FRANCISCO, CA1 shared Daniel B. Asher · Chicago, IL1 shared James Umland · Boulder, CO1 shared Jonathan Jonis · Boulder, CO1 shared Greg Zeschuk · Vancouver, British Columbia, Canada1 shared Peter A. Sorrell · Colorado Springs, CO1 shared

Recent filings (8)

Green Steel Enviornmental, Inc.Feb 2026 · 2 co-filers$2.4M Green Steel Enviornmental, Inc.Oct 2025 · 8 co-filers$2.5M CASTLE CREEK FUND LP /ILOct 2013 · 7 co-filers CASTLE CREEK FUND LP /ILMar 2012 · 7 co-filers CASTLE CREEK FUND LP /ILMar 2011 · 7 co-filers CASTLE CREEK FUND LP /ILMar 2010 · 9 co-filers CASTLE CREEK FUND LP /ILMar 2009 · 9 co-filers CC ARB FUND LLCMar 2009 · 12 co-filers

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