People · Operator

Greg Robert Madden

Named in public records as an officer, director or promoter · active 2025–2025 · Biotechnology

1
Companies
1
Filings
$55.9M
Combined raised · real
Single
Operator type
Companies
CompanyRoleSectorStageRaised · realValue · estTied
Spineology IncBiotechnologySeries B$55.9M$35.0M2025
Operator network

Greg Robert Madden at the center, the companies they're named on, and every other operator named alongside them — an interlock map of shared founding teams, boards and funds. Name-matched, so treat as a research lead.

Carter McNabb · 10 companies · 1 sharedCarter McNabbJohn Booth · 4 companies · 1 sharedJohn BoothJ. ROBERT PAULSON · 4 companies · 1 sharedJ. ROBERT PAULSONGREG MADDEN · 3 companies · 1 sharedGREG MADDENBrian Snider · 2 companies · 1 sharedBrian SniderEdson W. Spencer · 2 companies · 1 sharedEdson W. SpencerJames Rybicki · 2 companies · 1 sharedJames RybickiRobert Paulson · 2 companies · 1 sharedRobert PaulsonBRIAN ROBERT SNIDER · 1 companies · 1 sharedBRIAN ROBERT SNID…CARTER ROBERT MCNABB · 1 companies · 1 sharedCARTER ROBERT MCN…CRAIG ROBERT MATTURO · 1 companies · 1 sharedCRAIG ROBERT MATT…Craig Robert Matturro · 1 companies · 1 sharedCraig Robert Matt…Dick Nigon · 1 companies · 1 sharedDick NigonDick R. Nigon · 1 companies · 1 sharedDick R. NigonDonald Brattain · 1 companies · 1 sharedDonald BrattainDonald R. Brattain · 1 companies · 1 sharedDonald R. BrattainEd Spencer · 1 companies · 1 sharedEd SpencerEd T. Spencer, Jr. · 1 companies · 1 sharedEd T. Spencer, Jr.James T. Rybicki · 1 companies · 1 sharedJames T. RybickiJAMISON ROBERT YOUNG · 1 companies · 1 sharedJAMISON ROBERT YO…Jamison Young · 1 companies · 1 sharedJamison YoungJohn J. Booth · 1 companies · 1 sharedJohn J. BoothSpineology Inc · $55.9M raisedSpineology IncGreg Robert MaddenGM
Greg Robert Madden Company Co-operator (ring = serial)Hover to isolate ties · click to open
Co-operators (shared boards)

People named alongside Greg Robert Madden on the same companies — an interlock signal (shared founding team, board, or fund). Name-matched, so verify before acting.

OperatorSharedTheir companies
Carter McNabb110
John Booth14
J. ROBERT PAULSON14
GREG MADDEN13
Edson W. Spencer12
Robert Paulson12
Brian Snider12
James Rybicki12
Steve Nemitz11
JAMISON ROBERT YOUNG11
CRAIG ROBERT MATTURO11
CARTER ROBERT MCNABB11
BRIAN ROBERT SNIDER11
Donald Brattain11
Thomas Robert Patton11
Phil Soran11
Ed Spencer11
Jamison Young11
Dick Nigon11
Ed T. Spencer, Jr.11

People are matched by normalized name across records; a common name may merge distinct individuals. Treat as a research lead, the same way modeled valuations are directional, not quoted.