Investor · Cambridge, MA

Jeffrey M. Welles

Open Jeffrey in the network graph →

Filings

13

SEC Form D

Connections

46

co-filers

Capital

$12.9M

across filings

Active

Apr 2023

to Dec 2025

Most-connected co-filers (46)

Benjamin W. Texter · New York, NY11 shared Luke Nosek · Austin, TX6 shared Nicolas Bos · Geneva, V86 shared Stephen Oskoui · Austin, TX6 shared Gary Saage · Geneva, V86 shared John Simpson · Potomac, MD5 shared Kelly T. Baird · Denver, CO5 shared L. J. Morris · CANONSBURG, PA3 shared David Shulkin · RADNOR, PA3 shared Clint A. Soderstrom · CANONSBURG, PA3 shared James E. Crockard Iii · CANONSBURG, PA3 shared Lacey L. Vincent · CANONSBURG, PA3 shared Benjamin Glatter · New York, NY3 shared Christopher R. Losapio · Chevy Chase, MD3 shared Katherine J. Bryan · CHICAGO, IL3 shared Lauren T. Clough · Denver, CO2 shared Joseph M. Devivo · Santa Barbara, CA2 shared Michael M. Clifford · Cambridge, MA2 shared David M. Neafus · Cambridge, MA2 shared James M. Shanahan · Cambridge, MA2 shared Steven G. Chrust · Stamford, CT2 shared Vahe A. Dombalagian · CHICAGO, IL2 shared Christopher Geyen · Plymouth, MN2 shared Charlie M. Flynn · Cambridge, MA2 shared

Recent filings (13)

SYNDEVRX INCDec 2025 · 7 co-filers$20.0M SYNDEVRX INCDec 2025 · 7 co-filers$20.0M SYNDEVRX INCNov 2025 · 7 co-filers$12.0M SYNDEVRX INCNov 2025 · 7 co-filers$12.0M Quantum Surgical IncSep 2025 · 17 co-filers$75.0M Quantum Surgical IncAug 2025 · 17 co-filers$68.0M Gigafund 0.27, LPJun 2024 · 9 co-filers$25.0M Gigafund 0.28, LPJun 2024 · 9 co-filers$100.0M Gigafund 0.26, LPJun 2024 · 9 co-filers$15.0M Gigafund 0.25, LPMay 2024 · 7 co-filers$100.0M Gigafund 0.24, LPDec 2023 · 5 co-filers$16.0M Gigafund 0.22, LPMay 2023 · 5 co-filers$65.0M LOLA ENERGY VI, LLCApr 2023 · 11 co-filers$20.0M LOLA ENERGY HOLDINGS VI LLCApr 2023 · 14 co-filers$18.0M MUDDY CREEK ENERGY PARTNERS III LLCApr 2023 · 14 co-filers$18.0M

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