People · Operator

Dan Geffken

Named in public records as an officer, director or promoter · active 2018–2019 · Biotechnology

1
Companies
2
Filings
$88.3M
Combined raised · real
Single
Operator type
Companies
CompanyRoleSectorStageRaised · realValue · estTied
Cabaletta Bio, Inc.—BiotechnologySeries C$88.3M$2.0B2018
Operator network

Dan Geffken 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.

Mark Simon · 6 companies · 1 sharedMark SimonBrian Daniels · 5 companies · 1 sharedBrian DanielsSteven Nichtberger · 3 companies · 1 sharedSteven NichtbergerCabaletta Bio, Inc. · $88.3M raisedCabaletta Bio, Inc.Dan GeffkenDG
Dan Geffken Company Co-operator (ring = serial)Hover to isolate ties · click to open
Co-operators (shared boards)

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

OperatorSharedTheir companies
Mark Simon16
Brian Daniels15
Steven Nichtberger13

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.