Investor · NEW YORK, NY

Sio Gp, Llc

Open Sio in the network graph →

Filings

18

SEC Form D

Connections

21

co-filers

Capital

—

across filings

Active

Apr 2009

to Feb 2026

Most-connected co-filers (21)

Sio Gp, Llc · New York, NY17 shared Sio Capital Management, Llc · New York, NY15 shared Michael Castor · NEW YORK, NY15 shared Sio Gp, Llc · New York, NY14 shared Sio Capital Management, Llc · New York, NY12 shared Brett Siegal · Chicago, IL8 shared Marc Kerrest · Cupertino, CA7 shared Michelle Ringold · Richton Park, IL7 shared Brian Chee · West Chester, PA7 shared John Tighe Iv · SAN FRANCISCO, CA2 shared Arne S. Duncan · Chicago, IL2 shared W. Sio Capital Management, Llc · NEW YORK, NY2 shared Brad Bernstein · SAN FRANCISCO, CA2 shared Judah Drillick · NEW YORK, NY2 shared Jin W. Lee · NEW YORK, NY2 shared Janel Fillinger · Salt Lake City, UT2 shared David Schmidtknecht · McLean, VA2 shared W. Sio Capital Management, Llc · NEW YORK, NY2 shared W. Sio Capital Management, Llc · NEW YORK, NY2 shared Erik Hagge · Thousand Oaks, CA2 shared James F. Laird · Columbus, OH1 shared

Recent filings (18)

Sio Partners LPFeb 2026 · 2 co-filers Sio Partners LPFeb 2025 · 7 co-filers Sio Partners LPMar 2024 · 7 co-filers Sio Partners LPMar 2023 · 7 co-filers Sio Select LLCMar 2022 · 14 co-filers Sio Partners LPMar 2022 · 7 co-filers Sio Select LLCMay 2021 · 14 co-filers Sio Partners LPMar 2021 · 7 co-filers Sio Partners LPMar 2020 · 7 co-filers Sio Partners LPMar 2019 · 7 co-filers Sio Partners LPApr 2018 · 7 co-filers Sio Partners LPApr 2017 · 7 co-filers Sio Partners LPApr 2016 · 7 co-filers SIO PARTNERS QP, LPApr 2015 · 7 co-filers Sio Partners LPApr 2015 · 7 co-filers SIO PARTNERS QP LPApr 2014 · 4 co-filers Sio Partners LPApr 2014 · 4 co-filers Sio Partners LPApr 2009 · 3 co-filers

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