Investor · Guilford, CT

Stephen J. Doberstein

Open Stephen in the network graph →

Filings

13

SEC Form D

Connections

51

co-filers

Capital

$420K

across filings

Active

May 2023

to Dec 2025

Most-connected co-filers (51)

Shadrach Benny Retnamony · Miramar, FL5 shared Curtis Burgess · Madison, WI5 shared Jonathan Zalevsky · NORFOLK, VA4 shared Aman Kant · Guilford, CT4 shared Paul Grossinger · Burlington, VT2 shared Arie N. Page · Vancouver, British Columbia, Canada2 shared Neil T. Wahlgren · Dallas, TX2 shared Cyrus Gentry · New York, NY2 shared Lawrence Page · VANCOUVER, British Columbia, Canada2 shared Andrew T. Gi · Fort Worth, TX2 shared Dax T. Mitchell · Dallas, TX2 shared Peter Cheesbrough · DENVER, CO2 shared Hui (Stephanie) Luo · New York, NY2 shared Russell Ball · VANCOUVER, British Columbia, Canada2 shared Tracy Xia · New York, NY2 shared Anthony R. Paesano · Bloomfield Hills, MI2 shared Yanling (Flora) Peng · New York, NY2 shared Mona Liang · New York, NY2 shared Yan Zhang · New York, NY2 shared Amanda Chang · New York, NY2 shared Demetrios J. Kydonieus · Guilford, CT2 shared Krishnan Nandabalan · Guilford, CT2 shared Salvatore J. Alesci · Guilford, CT2 shared Kerrie J. Brady · Guilford, CT2 shared

Recent filings (13)

Invea Therapeutics, IncDec 2025 · 26 co-filers$120K Invea Therapeutics, IncDec 2025 · 26 co-filers$120K Classover Holdings, Inc.Jun 2025 · 17 co-filers$500.0M Classover Holdings, Inc.Apr 2025 · 17 co-filers$5.0M Invea Therapeutics, IncApr 2025 · 26 co-filers$600K Invea Therapeutics, IncApr 2025 · 26 co-filers$600K Forte Biosciences, Inc.Aug 2023 · 20 co-filers$25.0M Forte Biosciences, Inc.Aug 2023 · 20 co-filers$25.0M ESpace Networks, Inc.Jun 2023 · 2 co-filers$600K ESpace Networks, Inc.Jun 2023 · 2 co-filers$75K ESpace Networks, Inc.Jun 2023 · 2 co-filers$10.0M ESpace Networks, Inc.Jun 2023 · 2 co-filers$200K ESpace Networks, Inc.Jun 2023 · 2 co-filers$500K Vantage Acquisition Partners, LLCJun 2023 · 2 co-filers$7.6M Vantage Acquisition Partners, LLCMay 2023 · 2 co-filers$7.0M NEKTAR THERAPEUTICSApr 2018 · 25 co-filers$850.0M NEKTAR THERAPEUTICSApr 2018 · 25 co-filers$850.0M

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