Investor · Addison, TX

Stephen J. Mastor

Open Stephen in the network graph →

Filings

249

SEC Form D

Connections

289

co-filers

Capital

$1.7B

across filings

Active

Dec 2011

to Sep 2025

Most-connected co-filers (289)

Harvey E. Gartley · Shavano Park, TX88 shared Glenn Welling · Newport Beach, CA88 shared Todd Sherer · Los Angeles, CA86 shared Paul Batcheller · Bloomington, MN86 shared Stewart Kohl · Cleveland, OH84 shared David Ferrera · IRVINE, CA84 shared Engaged Capital, LLC · Newport Beach, CA82 shared Randy Williams · SAN FRANCISCO, CA82 shared David Fann · ASHEVILLE, NC76 shared Steve Woody · ASHEVILLE, NC76 shared Charles Owen · ASHEVILLE, NC75 shared Joe M. Mcguire · ASHEVILLE, NC73 shared Jason Becker · Atlanta, GA72 shared Doug Leone · Menlo Park, CA72 shared Paul Cox · ASHEVILLE, NC70 shared Karan Rai · ASHEVILLE, NC61 shared Louis Buck · ASHEVILLE, NC49 shared Paul Coviello · ASHEVILLE, NC49 shared Engaged Capital Holdings LLC · Newport Beach, CA49 shared Dov J. Kotler · New York, NY39 shared Jeffrey Strong · New York, NY39 shared Lucas Stoioff · Chicago, IL37 shared Ryan J. Schaefer · Fort Collins, CO37 shared David Rekhson · Chicago, IL37 shared

Recent filings (249)

Chord TopCo, LPNov 2025 · 38 co-filers Chord TopCo, LPNov 2025 · 38 co-filers Phoenix Fund XI Feeder, L.P.Sep 2025 · 2 co-filers Phoenix Fund XI Blocker, LLCOct 2024 · 3 co-filers Phoenix Real Estate Fund XI, L.P.Oct 2024 · 3 co-filers Phoenix Real Estate Fund XI-B, L.P.Oct 2024 · 3 co-filers PCIP III Emerson Pointe SeriesAug 2022$3.6M PCIP LT Rouzan SeriesAug 2022$15.6M PCIP III Crest at Woodman SeriesAug 2022$998K PCIP III Leander SeriesAug 2022$1.4M PCIP LT Granite Mountain SeriesAug 2022$15.5M PCIP III Century Farms SeriesAug 2022$1.1M PCIP LT Argento at Bridges SeriesAug 2022$15.5M PCIP LT Ventures Longview SeriesAug 2022$9.4M Phoenix Real Estate Fund X, L.P.Aug 2022 · 2 co-filers Phoenix Real Estate Fund X, L.P.Mar 2022 · 2 co-filers PCIP IV Grove SeriesOct 2021$16.1M PCIP IV West Mesa SeriesOct 2021$850K PCIP IV Briargate SeriesOct 2021$689K PCIP IV Parker SeriesJun 2021$9.1M PCIP III Highlands SeriesJun 2021$990K PCIP III Echelon at Kissimmee SeriesJun 2021$735K PCIP III Eagleview SeriesJun 2021$817K Phoenix Real Estate Fund X, L.P.Mar 2021 · 2 co-filers PCIP III Cypress Creek SeriesMar 2021$639K

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