Investor · White Plains, NY

Mark W. Steffen

Open Mark in the network graph →

Filings

10

SEC Form D

Connections

15

co-filers

Capital

—

across filings

Active

Mar 2009

to Jan 2026

Most-connected co-filers (15)

Joseph M. Dalton · Rye Brook, NY10 shared Patricia Ransom · Greenwich, CT8 shared Brad Cox · Greenwich, CT8 shared James D. Bennett · Stamford, CT2 shared Nedim R. Hamarat · BRONX, NY2 shared Mary Palmer · BRONX, NY2 shared Bradley H. Lamensdorf · Westport, CT2 shared Eugene Seymour · Providence, RI2 shared Gordon Neal · Vancouver, British Columbia, Canada1 shared Jon P. Sherron · NORTH VANCOUVER, British Columbia, Canada1 shared Marla K. Ritchie · Vancouver, British Columbia, Canada1 shared J. Patricio Varas · Vancouver, British Columbia, Canada1 shared Stuart Ross · Vancouver, British Columbia, Canada1 shared David Reid · Mercer Island, WA1 shared Hendrik Van Alphen · Vancouver, British Columbia, Canada1 shared

Recent filings (10)

Domestic Metals Corp.Jan 2026 · 6 co-filers$730K Domestic Metals Corp.Oct 2025 · 20 co-filers$251K BELLE HAVEN AGGRESSIVE MUNI L PMar 2013 · 3 co-filers BELLE HAVEN AGGRESSIVE MUNI L PMar 2013 · 3 co-filers BELLE HAVEN AGGRESSIVE MUNI L PMar 2012 · 3 co-filers BELLE HAVEN AGGRESSIVE MUNI L PMar 2011 · 3 co-filers BELLE HAVEN AGGRESSIVE MUNI L PMar 2010 · 3 co-filers BELLE HAVEN AGGRESSIVE MUNI L PMar 2010 · 3 co-filers BELLE HAVEN AGGRESSIVE MUNI L PMar 2009 · 3 co-filers BELLE HAVEN AGGRESSIVE MUNI L PMar 2009 · 3 co-filers

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