Investor · Los Angeles, CA
Justin Mateen
Open Justin in the network graph →Filings
32
SEC Form D
Connections
152
co-filers
Capital
$247.5M
across filings
Active
Sep 2021
to Oct 2025
Most-connected co-filers (152)
Camilo Sanchez · FOLSOM, CA9 sharedTulio E. Jimenez · FOLSOM, CA8 sharedColm O'Shea · Arcata, CA7 sharedJohn G. Brant · Denver, CO7 sharedDavid K. Medanich · Dallas, TX6 sharedChad Dale · Seattle, WA6 sharedMichael J. Marz · DALLAS, TX6 sharedIsabella M. Coutinho · Grand Cayman, Cayman Islands6 sharedGregory Richter · New York, NY6 sharedFelipe Samper · FOLSOM, CA5 sharedSame Medalist Partners Harvest GP, LLC · New York, NY5 sharedManuela Sanchez · FOLSOM, CA5 sharedJudy Z. Sun · New York, NY5 sharedJoseph P. Bachkosky · Miami, FL4 sharedVanessa Bartram · Tel Aviv, L34 sharedPhillip S. Dingle · Tampa, FL4 sharedJohn Richardson · New York, NY4 sharedLuke Baumgarten · Spokane, WA4 sharedMarc P. Seidner · NEWPORT BEACH, CA4 sharedMihir P. Worah · NEWPORT BEACH, CA4 sharedAnna Kovalkova · Brentwood, TN4 sharedD. R. Crants, Iii · Brentwood, TN4 sharedGaurav Manglik · Redwood City, CA4 sharedRevel Wood · Howald, Luxembourg, Luxembourg4 shared
Recent filings (32)
JAM Curative L.P.Oct 2025 · 2 co-filersAmerican Bitcoin Corp.Jul 2025 · 9 co-filers$250.0MAmerican Bitcoin Corp.Jul 2025 · 9 co-filers$250.0MJAM ABL Space Target Fund 2, L.P.Dec 2024 · 3 co-filersPHION Technologies Corp.Sep 2024 · 11 co-filers$1.3MJAM Target Fund 5, L.P.Sep 2024 · 2 co-filersMedalist Partners Harvest Fund, LPJun 2024 · 11 co-filersBudaCorpJun 2024 · 15 co-filers$8.0MBudaCorpJun 2024 · 15 co-filers$8.0Mr.World, PBCAug 2023 · 29 co-filers$2.7Mr.World, PBCAug 2023 · 29 co-filers$4.1MBudaCorpJul 2023 · 14 co-filers$50.0MBudaCorpJul 2023 · 14 co-filers$50.0MMedalist Partners Harvest Fund, LPJun 2023 · 11 co-filersHeading Health Inc.Feb 2023 · 10 co-filers$4.0MHeading Health Inc.Feb 2023 · 10 co-filers$4.0MHEALTHEDGE INVESTMENT FUND IV, L.P.Jan 2023 · 11 co-filers$185.2MHEALTHEDGE INVESTMENT FUND IV (PARALLEL FUND), L.P.Jan 2023 · 11 co-filers$185.2MUHY Advisors IncAug 2022 · 29 co-filers$5.3MMedalist Partners Harvest Fund, LPJul 2022 · 11 co-filersLaika Universe Inc.Jan 2022 · 19 co-filers$47.8MPHION Technologies Corp.Jan 2022 · 11 co-filers$1.0MHEALTHEDGE INVESTMENT FUND IV, L.P.Jan 2022 · 11 co-filers$175.0MHEALTHEDGE INVESTMENT FUND IV (PARALLEL FUND), L.P.Jan 2022 · 11 co-filers$175.0MJAM ABL Space Target Fund, L.P.Oct 2021 · 3 co-filers
Derived from public SEC Form D (Reg D) filings; entities resolved probabilistically. See Justin in the interactive graph →