People · Operator

Joel Johnston Marcus

Named in public records as an officer, director or promoter · active 2015–2018 · Biotechnology, Other

5
Companies
9
Filings
$123.8M
Combined raised · real
Serial
Operator type
Companies
CompanyRoleSectorStageRaised · realValue · estTied
Petra Pharma CorpBiotechnologySeries B$58.8M$1.1B2015
Magnolia Neurosciences CorpBiotechnologySeries B$26.4M$724.5M2018
Lodo Therapeutics CorpBiotechnologySeries B$19.9M$788.5M2015
Proniras CorpOtherSeries A$11.2M$37.2M2017
ApoGen Biotechnologies, Inc.BiotechnologySeries A$7.6M$273.5M2016
Operator network

Joel Johnston Marcus 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.

Joel Marcus · 9 companies · 1 sharedJoel MarcusJames Sullivan · 7 companies · 1 sharedJames SullivanJohn Santini · 5 companies · 1 sharedJohn SantiniDavid McElligott · 2 companies · 1 sharedDavid McElligottIan A.W. Howes · 2 companies · 1 sharedIan A.W. HowesKeno Gutierrez · 2 companies · 1 sharedKeno GutierrezJames Johnston Sullivan · 3 companies · 3 sharedJames Johnston Su…David Schubert · 6 companies · 2 sharedDavid SchubertSteve Gillis · 13 companies · 4 sharedSteve GillisBarbara Johnston Dalton · 3 companies · 3 sharedBarbara Johnston …Ian Howes · 5 companies · 1 sharedIan HowesKendall Mohler · 5 companies · 1 sharedKendall MohlerMichael Baran · 4 companies · 1 sharedMichael BaranDavid Johnston McElligott · 2 companies · 2 sharedDavid Johnston Mc…Misti Johnston Ushio · 2 companies · 2 sharedMisti Johnston Us…David Johnston Schubert · 3 companies · 3 sharedDavid Johnston Sc…Lindsay Johnston Rayle · 3 companies · 3 sharedLindsay Johnston …Asish Xavier · 18 companies · 5 sharedAsish XavierThong Le · 12 companies · 5 sharedThong LeM. Johnston Erwin · 5 companies · 5 sharedM. Johnston ErwinSteven Gillis · 23 companies · 1 sharedSteven GillisLindsay Rayle · 7 companies · 2 sharedLindsay RaylePetra Pharma Corp · $58.8M raisedPetra Pharma CorpMagnolia Neurosciences Corp · $26.4M raisedMagnolia Neuroscience…Lodo Therapeutics Corp · $19.9M raisedLodo Therapeutics CorpProniras Corp · $11.2M raisedProniras CorpApoGen Biotechnologies, Inc. · $7.6M raisedApoGen Biotechnologie…Joel Johnston MarcusJM
Joel Johnston Marcus Company Co-operator (ring = serial)Hover to isolate ties · click to open
Co-operators (shared boards)

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

OperatorSharedTheir companies
Asish Xavier518
Thong Le512
M. Johnston Erwin55
Steve Gillis413
Lindsay Johnston Rayle33
James Johnston Sullivan33
David Johnston Schubert33
Barbara Johnston Dalton33
Lindsay Rayle27
David Schubert26
David Johnston McElligott22
Misti Johnston Ushio22
Steven Gillis123
Joel Marcus19
James Sullivan17
Kendall Mohler15
Ian Howes15
John Santini15
Michael Baran14
Ian A.W. Howes12

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.