Investor · Grapevine, TX

Jack L. Langenberg Iii

Open Jack in the network graph →

Filings

10

SEC Form D

Connections

51

co-filers

Capital

$19.6M

across filings

Active

May 2021

to Jan 2026

Most-connected co-filers (51)

Alan C. Stewart · Grapevine, TX9 shared Tom Yanagi · New York, NY4 shared Peter C. Hopper · Boca Raton, FL4 shared Benjamin Jenkins · Boca Raton, FL4 shared Signet CU Manager, LLC · Akron, OH4 shared Elena Maley · FORT LEE, NJ4 shared First Light Genesis+ Fund GP, LLC · Edina, MN3 shared First Light Asset Management, LLC · Edina, MN3 shared Michael T. Graham · Lewisville, TX3 shared Zachary K. Chernoch · Naples, FL3 shared Nicholas Marsh Iii · NEW YORK, NY3 shared Nathan K. Brammeier · Naples, FL3 shared Charles Kremer · Rye Brook, NY3 shared Tony D. Shure · NEW YORK, NY3 shared Victor D. Stevenson · NEW YORK, NY3 shared Amit W. Chandan · Naples, FL3 shared Christopher Roberts · NEW YORK, NY3 shared Christopher A. Bulger · London, United Kingdom3 shared Colin D. Mccabe · NEW YORK, NY3 shared Hoang Quang K. Vo · Naples, FL3 shared Tom R. Kelleher · Los Angeles, CA3 shared Fanny A. Him · Luxembourg, Luxembourg3 shared Gaetan A. Dumont · Luxembourg, Luxembourg3 shared Allen T. Thorpe · Lewisville, TX3 shared

Recent filings (10)

FOUNDERS TABLE RESTAURANT GROUP, LLCJan 2026 · 8 co-filers$8.5M SCG I MM, LLCJan 2025 · 5 co-filers$15.5M SCG I MM, LLCMay 2024 · 5 co-filers$20.0M FOUNDERS TABLE RESTAURANT GROUP, LLCOct 2023 · 35 co-filers$30.5M PROXIMITY THERAPEUTICS, INC.Jan 2023 · 7 co-filers$11.0M SCG I MM, LLCSep 2022 · 9 co-filers$35.0M FOUNDERS TABLE RESTAURANT GROUP, LLCJul 2022 · 38 co-filers$30.0M FOUNDERS TABLE RESTAURANT GROUP, LLCMay 2021 · 27 co-filers$23.0M PROXIMITY THERAPEUTICS, INC.May 2021 · 5 co-filers$2.0M OS601, LLCMay 2018 · 3 co-filers$4.5M OS601, LLCMay 2018 · 3 co-filers$4.5M

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