People · Operator

Darren O'Brien

Named in public records as an officer, director or promoter · active 2020–2022 · Pharmaceuticals, Other, Fintech

4
Companies
7
Filings
$322.1M
Combined raised · real
Serial
Operator type
Companies
CompanyRoleSectorStageRaised · realValue · estTied
AEON Biopharma, Inc.PharmaceuticalsSeries C$197.1M$511.8M2020
Alphaeon 1 LLCOtherSeries C$96.8M$1.7B2020
Alphaeon Credit HoldCo LLCFintechSeries B$19.5M$560.9M2020
Zelegent HoldCo LLCOtherSeries A$8.7M$121.4M2020
Operator network

Darren O'Brien 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.

Juliet Tammenoms Bakker · 5 companies · 1 sharedJuliet Tammenoms …Robert E. Grant · 5 companies · 1 sharedRobert E. GrantAlex Wilson · 3 companies · 1 sharedAlex WilsonHans S. Keirstead · 2 companies · 1 sharedHans S. KeirsteadBill Tammenoms Richardson · 1 companies · 1 sharedBill Tammenoms Ri…Bosun Tammenoms Hau · 1 companies · 1 sharedBosun Tammenoms H…Chad Oh · 1 companies · 1 sharedChad OhChris Carr · 1 companies · 1 sharedChris CarrChristopher Tammenoms Cox · 1 companies · 1 sharedChristopher Tamme…Craig Tammenoms Kussman · 1 companies · 1 sharedCraig Tammenoms K…Dennis Tammenoms Wolf · 1 companies · 1 sharedDennis Tammenoms …James Xiaodong Liu · 1 companies · 1 sharedJames Xiaodong LiuJeevan Tammenoms Gore · 1 companies · 1 sharedJeevan Tammenoms …Marc Forth · 1 companies · 1 sharedMarc ForthPatrick S. Maxwell · 1 companies · 1 sharedPatrick S. MaxwellRichard S. Lindstrom · 1 companies · 1 sharedRichard S. Lindst…Robert Grant · 12 companies · 4 sharedRobert GrantSimone Blank · 5 companies · 4 sharedSimone BlankVikram Malik · 5 companies · 4 sharedVikram MalikJost Fischer · 4 companies · 4 sharedJost FischerRICK TAKETA · 3 companies · 3 sharedRICK TAKETADAVID MEREDITH · 3 companies · 2 sharedDAVID MEREDITHAEON Biopharma, Inc. · $197.1M raisedAEON Biopharma, Inc.Alphaeon 1 LLC · $96.8M raisedAlphaeon 1 LLCAlphaeon Credit HoldCo LLC · $19.5M raisedAlphaeon Credit HoldC…Zelegent HoldCo LLC · $8.7M raisedZelegent HoldCo LLCDarren O'BrienDO
Darren O'Brien Company Co-operator (ring = serial)Hover to isolate ties · click to open
Co-operators (shared boards)

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

OperatorSharedTheir companies
Robert Grant412
Vikram Malik45
Simone Blank45
Jost Fischer44
RICK TAKETA33
DAVID MEREDITH23
Robert E. Grant15
Juliet Tammenoms Bakker15
Alex Wilson13
Hans S. Keirstead12
Robert Tammenoms Rhatigan11
Craig Tammenoms Kussman11
Vikram S. Malik11
Robert S. Hayman11
Valerie S. Taupin11
Dennis Tammenoms Wolf11
James Xiaodong Liu11
Christopher Tammenoms Cox11
Bosun Tammenoms Hau11
Bill Tammenoms Richardson11

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.