Investor · New York, NY

Thomas Klingenstein

Open Thomas in the network graph →

Filings

26

SEC Form D

Connections

77

co-filers

Capital

$6.2B

across filings

Active

Aug 2017

to Aug 2025

Most-connected co-filers (77)

George Cohen · New York, NY14 shared Cohen Klingenstein, Llc · New York, NY12 shared Cohen Klingenstein, Llc · New York, NY11 shared Cohen Klingenstein, Llc · New York, NY8 shared Justin Wright-Eakes · Raleigh, NC6 shared Penny Shikowitz · Durham, NC6 shared Christopher Jones · Kaysville, UT6 shared Jonathan Albright · SIOUX FALLS, SD6 shared Marc Probst · Kaysville, UT6 shared Larry F. Mccrary · GREENVILLE, DE5 shared Joan T. Williams · GREENVILLE, DE5 shared Margaret Preston · New York, NY5 shared Steven Rowe · Gaithersburg, MD4 shared Jonathan Perl · Owings Mills, MD4 shared Orlando Muyshondt · New York, NY4 shared Ken W. Glickstein · Denver, CO4 shared John W. Sawyer · Indianapolis, IN4 shared Caryn T. Seidman-Becker · New York, NY3 shared Dave Rich · Greenville, SC3 shared Jorge Espinel · Philadelphia, PA3 shared Marc A. Vorkapich · GREENVILLE, DE3 shared Navjot Athwal · San Francisco, CA3 shared Charles A. Roe, Iv · GREENVILLE, DE3 shared Lydia Kennard · Greenville, SC2 shared

Recent filings (26)

CK Diversified Fund LLCMar 2026 · 3 co-filers CK Diversified Fund LLCAug 2025 · 11 co-filers CK Diversified Fund LLCAug 2024 · 11 co-filers CK Diversified Fund LLCSep 2023 · 11 co-filers CK Diversified Fund LLCSep 2022 · 11 co-filers CK Diversified Fund LLCSep 2021 · 8 co-filers CK Diversified Fund LLCSep 2020 · 8 co-filers CK Diversified Fund LLCSep 2019 · 5 co-filers DEFTA HEALTHCARE TECHNOLOGIES, L.P.Jun 2019 · 2 co-filers MERCATOR MEDSYSTEMS INCJun 2019 · 17 co-filers$15.0M DEFTA HEALTHCARE TECHNOLOGIES, L.P.Jun 2019 · 2 co-filers CK Diversified Fund LLCSep 2018 · 5 co-filers MERCATOR MEDSYSTEMS INCJul 2018 · 11 co-filers$14.9M CK Diversified Fund LLCSep 2017 · 5 co-filers DEFTA HEALTHCARE TECHNOLOGIES, L.P.Aug 2017 · 1 co-filer DEFTA HEALTHCARE TECHNOLOGIES, L.P.Aug 2017 · 1 co-filer CK Diversified Fund LLCSep 2016 · 8 co-filers Proterra IncNov 2015 · 20 co-filers$161K CK Diversified Fund LLCSep 2015 · 8 co-filers Proterra IncJun 2015 · 20 co-filers$30.0M SeatGeek, Inc.Sep 2014 · 9 co-filers$35.0M Proterra IncJun 2014 · 9 co-filers$42.5M Proterra IncDec 2013 · 9 co-filers$40.0M SeatGeek, Inc.Dec 2013 · 7 co-filers$2.2M Proterra IncOct 2013 · 9 co-filers$40.0M

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