People · Operator

Michael Mason

Named in public records as an officer, director or promoter · active 2009–2022 · Pharmaceuticals, Other, Other Health Care

4
Companies
4
Filings
$209.5M
Combined raised · real
Serial
Operator type
Companies
CompanyRoleSectorStageRaised · realValue · estTied
Karyopharm Therapeutics Inc.PharmaceuticalsSeries D+$205.2M$2.8B2022
Ecu Silver Mining IncOtherSeed$4.0M$74.1M2009
Boston Out-Patient Surgical Suites, L.L.C.Other Health CarePre-Seed$161K$5.0M2009
Waltham Administrative Management, L.L.C.Other Health CarePre-Seed$146K$4.5M2009
Operator network

Michael Mason 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.

Paul Brannelly · 4 companies · 1 sharedPaul BrannellySharon Shacham · 4 companies · 1 sharedSharon ShachamALAN BARBER · 3 companies · 1 sharedALAN BARBERMansoor Raza Mirza · 3 companies · 1 sharedMansoor Raza MirzaBarry E. Greene · 2 companies · 1 sharedBarry E. GreeneDeepika R Pakianathan · 2 companies · 1 sharedDeepika R Pakiana…Dwight Walker · 4 companies · 1 sharedDwight WalkerStephen Altmann · 3 companies · 1 sharedStephen AltmannAlan Curtis · 2 companies · 1 sharedAlan CurtisPaul Weitzel · 4 companies · 2 sharedPaul WeitzelBrian McKeon · 3 companies · 2 sharedBrian McKeonAnthony Schena · 2 companies · 2 sharedAnthony SchenaArnold Scheller · 2 companies · 2 sharedArnold SchellerBarry Simmons · 2 companies · 2 sharedBarry SimmonsBrent W Lambert · 2 companies · 2 sharedBrent W LambertChristopher Wenger · 2 companies · 2 sharedChristopher WengerGlenn Ross · 2 companies · 2 sharedGlenn RossHenry Toczylowski · 2 companies · 2 sharedHenry ToczylowskiJames Karlson · 2 companies · 2 sharedJames KarlsonMark Slovenkai · 2 companies · 2 sharedMark SlovenkaiRoberto Feliz · 2 companies · 2 sharedRoberto FelizSuzanne Miller · 2 companies · 2 sharedSuzanne MillerKaryopharm Therapeutics Inc. · $205.2M raisedKaryopharm Therapeuti…Ecu Silver Mining Inc · $4.0M raisedEcu Silver Mining IncBoston Out-Patient Surgical Suites, L.L.C. · $0.2M raisedBoston Out-Patient Su…Waltham Administrative Management, L.L.C. · $0.1M raisedWaltham Administrativ…Michael MasonMM
Michael Mason Company Co-operator (ring = serial)Hover to isolate ties · click to open
Co-operators (shared boards)

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

OperatorSharedTheir companies
Paul Weitzel24
Brian McKeon23
James Karlson22
Mark Slovenkai22
Christopher Wenger22
Suzanne Miller22
Glenn Ross22
Anthony Schena22
Brent W Lambert22
Barry Simmons22
Roberto Feliz22
Arnold Scheller22
Henry Toczylowski22
Dwight Walker14
Sharon Shacham14
Paul Brannelly14
Stephen Altmann13
Mansoor Raza Mirza13
ALAN BARBER13
Barry E. Greene12

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.