Investor · Safety Harbor, FL

Walter Groteke

Open Walter in the network graph →

Filings

21

SEC Form D

Connections

74

co-filers

Capital

$4.1M

across filings

Active

Apr 2019

to Jul 2025

Most-connected co-filers (74)

Kenneth Garraffa · Safety Harbor, FL14 shared Kevin D. Cole · Baltimore, MD13 shared Gabriel A. Morris · Baltimore, MD12 shared Elizabeth R. Neilson · New York, NY10 shared Timothy Haluszczak · New York, NY10 shared Barry Fitch · Safety Harbor, FL9 shared Benjamin Lantos · New York, NY9 shared Bryan J. Woods · New York, NY9 shared Samir R. Suri · New York, NY8 shared Paraag Sarva · New York, NY7 shared James Lucania · Dresher, PA6 shared Oliver Heimes · New York, NY6 shared Ivan Casty · Hallandale Beach, FL6 shared Keith M. Minty · Vancouver, British Columbia, Canada6 shared Patrick P. Stackpoole · Brighton, MI6 shared Jeremy B. Rossman · New York, NY5 shared Andrew Rebele · SEATTLE, WA5 shared Daniel A. Abelon · New York, NY5 shared Matthew B. Siano · New York, NY5 shared Corre Partners Advisors, LLC · New York, NY5 shared Stephane Mailhot · New York, NY5 shared Wray T. Thorn · New York, NY5 shared Bernard Darre · Highlands Ranch, CO5 shared Michael Osterhoff · Chesterfield, MO5 shared

Recent filings (21)

My Medical Hub CorpJul 2025 · 8 co-filers$9.5M My Medical Hub CorpJun 2025 · 8 co-filers$9.5M Rhino Labs, Inc.Aug 2023 · 20 co-filers$8.0M Rhino Labs, Inc.Jun 2023 · 20 co-filers$6.0M Rhino Labs, Inc.Jan 2023 · 23 co-filers$15.0M Rhino Labs, Inc.Jan 2022 · 20 co-filers$40.0M My Medical Hub CorpJan 2022 · 8 co-filers$5.0M My Medical Hub CorpSep 2021 · 8 co-filers$5.0M Rhino Labs, Inc.Jan 2021 · 17 co-filers$60.0M Two Sigma Ventures Co-Invest Fund, LLC - Investment Series 5Nov 2020 · 28 co-filers$853K My Medical Hub CorpSep 2020 · 8 co-filers$5.0M Rhino Labs, Inc.Sep 2020 · 14 co-filers$8.0M Two Sigma Ventures Co-Invest Fund, LLC - Investment Series 4Sep 2020 · 28 co-filers$3.0M Two Sigma Ventures Co-Invest Fund, LLC - Investment Series 3Jun 2020 · 27 co-filers$2.0M My Medical Hub CorpDec 2019 · 5 co-filers$5.0M My Medical Hub CorpDec 2019 · 5 co-filers$5.0M Two Sigma Ventures Co-Invest Fund, LLC - Investment Series 2Oct 2019 · 28 co-filers$500K Rhino Labs, Inc.Oct 2019 · 14 co-filers$7.0M Rhino Labs, Inc.Jul 2019 · 9 co-filers$14.0M Rhino Labs, Inc.Jun 2019 · 11 co-filers$14.0M Two Sigma Ventures Co-Invest Fund, LLC - Investment Series 1Jun 2019 · 27 co-filers$1.0M Rhino Labs, Inc.Apr 2019 · 11 co-filers$2.0M

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