Investor · Woburn, MA

Margaret Seif

Open Margaret in the network graph →

Filings

13

SEC Form D

Connections

64

co-filers

Capital

$92.2M

across filings

Active

Jun 2013

to Jul 2020

Most-connected co-filers (64)

Jennifer Fonstad · Palo Alto, CA7 shared Ob Bilous · Woburn, MA7 shared Bruce Sachs · Woburn, MA7 shared LAE General Partners Limited · Grand Cayman, Cayman Islands6 shared Eric Gribetz · New York, NY5 shared Craig D. Cogut · Melbourne, FL5 shared Lancaster Investment Management LLP · London, United Kingdom5 shared Andrew Lipman · BOSTON, MA5 shared Jeffrey J. Possick · Westport, CT5 shared Joel Haney · STAMFORD, CT5 shared Mark Nydam · Wellesley, MA5 shared Chad Laird · Bozeman, MT5 shared Jeffrey Horing · New York, NY4 shared Robert J. Goodman · LARCHMONT, NY4 shared Greg Schmergel · Woburn, MA4 shared Semper Vic GP, LLC · Lancaster, PA4 shared Kevin Burinescu · New York, NY4 shared Thomas A. Russo · Lancaster, PA4 shared Josh N. Felser · Mill Valley, CA4 shared Ian C. Lane · Boston, MA3 shared Jerry J. Baack · BLOOMINGTON, MN2 shared Thomas P. Trutna · BLOOMINGTON, MN2 shared Andrew Logan · Glendale, CO2 shared James S. Johnson · BLOOMINGTON, MN2 shared

Recent filings (13)

KOPIN CORPOct 2025 · 13 co-filers$41.0M KOPIN CORPOct 2025 · 13 co-filers$41.0M Bridgewater Bancshares IncJul 2020 · 34 co-filers$50.0M CLEARVOICE, INC.Aug 2017 · 5 co-filers$4.0M Bridgewater Bancshares IncJul 2017 · 16 co-filers$25.0M NANTERO INCMar 2017 · 12 co-filers$35.0M NANTERO INCDec 2016 · 11 co-filers$25.0M CLEARVOICE, INC.Dec 2015 · 8 co-filers$1.1M NANTERO INCAug 2015 · 14 co-filers$12.0M NANTERO INCFeb 2015 · 14 co-filers$41.5M CLEARVOICE, INC.Oct 2014 · 5 co-filers$250K Bridgewater Bancshares IncOct 2014 · 20 co-filers$426K Bridgewater Bancshares IncAug 2013 · 13 co-filers$8.0M Bridgewater Bancshares IncJun 2013 · 13 co-filers$5.0M

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