Investor · Stamford, CT

Ardsley Partners I GP, LLC

Open Ardsley in the network graph →

Filings

50

SEC Form D

Connections

6

co-filers

Capital

$3.9B

across filings

Active

Nov 2018

to Nov 2025

Most-connected co-filers (6)

Philip J. Hempleman · Stamford, CT50 shared Spencer J. Hempleman · Stamford, CT50 shared Ardsley Advisory Partners LP · Stamford, CT50 shared J. Hempleman · Stamford, CT6 shared Barry Gainsburg · Plantation, FL5 shared John B. Elstrott, Jr · San Clemente, CA4 shared

Recent filings (50)

Ardsley Duckdive Fund, L.P.Nov 2025 · 9 co-filers Ardsley Partners Fund II, L.P.Nov 2025 · 9 co-filers Ardsley World Information Technology Fund, L.P.Nov 2025 · 9 co-filers Ardsley Partners Advanced Healthcare Fund, L.P.Nov 2025 · 8 co-filers Ardsley Sustainable Opportunities Fund, L.P.Nov 2025 · 9 co-filers Ardsley World Information Technology Fund, L.P.Nov 2025 · 9 co-filers Ardsley Duckdive Fund, L.P.Nov 2025 · 9 co-filers Ardsley Sustainable Opportunities Fund, L.P.Nov 2025 · 9 co-filers Ardsley Partners Fund II, L.P.Nov 2025 · 9 co-filers Ardsley Partners Advanced Healthcare Fund, L.P.Nov 2025 · 8 co-filers Ardsley World Information Technology Fund, L.P.Nov 2024 · 6 co-filers Ardsley Ridgecrest Partners Fund, L.P.Nov 2024 · 6 co-filers Ardsley Partners Fund II, L.P.Nov 2024 · 6 co-filers Ardsley Duckdive Fund, L.P.Nov 2024 · 6 co-filers Ardsley Partners Advanced Healthcare Fund, L.P.Nov 2024 · 6 co-filers Ardsley Sustainable Opportunities Fund, L.P.Nov 2024 · 6 co-filers Ardsley Sustainable Opportunities Fund, L.P.Nov 2024 · 6 co-filers Ardsley Ridgecrest Partners Fund, L.P.Nov 2024 · 6 co-filers Ardsley Partners Advanced Healthcare Fund, L.P.Nov 2024 · 6 co-filers Ardsley Duckdive Fund, L.P.Nov 2024 · 6 co-filers Ardsley Partners Fund II, L.P.Nov 2024 · 6 co-filers Ardsley World Information Technology Fund, L.P.Nov 2024 · 6 co-filers Ardsley Ridgecrest Partners Fund, L.P.Nov 2023 · 5 co-filers Ardsley Sustainable Opportunities Fund, L.P.Nov 2023 · 5 co-filers Ardsley Partners Advanced Healthcare Fund, L.P.Nov 2023 · 5 co-filers

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