People · Operator

Matthew B. Klein

Named in public records as an officer, director or promoter · active 2020–2025 · Biotechnology, Other Health Care

2
Companies
2
Filings
$573.3M
Combined raised · real
Serial
Operator type
Companies
CompanyRoleSectorStageRaised · realValue · estTied
Ptc Therapeutics, Inc.BiotechnologySeries D+$483.4M$591.1M2020
Mri Interventions, Inc.Other Health CareSeries B$90.0M$76.6M2025
Operator network

Matthew B. Klein 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.

Jerome B. Zeldis · 5 companies · 1 sharedJerome B. ZeldisJerome B. Zeldis, M.D., Ph.D. · 2 companies · 1 sharedJerome B. Zeldis,…Peter P. Svennilson · 2 companies · 1 sharedPeter P. Svennils…Adam P. Koppel · 1 companies · 1 sharedAdam P. KoppelAlethia P. Young · 1 companies · 1 sharedAlethia P. YoungAllan D. Jacobson, Ph.D. · 1 companies · 1 sharedAllan D. Jacobson…Allan S. Jacobson · 1 companies · 1 sharedAllan S. JacobsonAxel P. Bolte · 1 companies · 1 sharedAxel P. BolteCarl P. Goldfischer · 1 companies · 1 sharedCarl P. Goldfisch…Christine E. Utter · 1 companies · 1 sharedChristine E. UtterChristine S. Utter · 1 companies · 1 sharedChristine S. UtterB. KRISTINE JOHNSON · 5 companies · 1 sharedB. KRISTINE JOHNS…Parker H. Petit · 5 companies · 1 sharedParker H. PetitR. John Fletcher · 4 companies · 1 sharedR. John FletcherCharles E. Koob · 3 companies · 1 sharedCharles E. KoobPascal E.R. Girin · 3 companies · 1 sharedPascal E.R. GirinAndrew K Rooke · 2 companies · 1 sharedAndrew K RookeBruce C. Conway · 2 companies · 1 sharedBruce C. ConwayCharles L. Koob · 2 companies · 1 sharedCharles L. KoobFrancis P. Grillo · 2 companies · 1 sharedFrancis P. GrilloJohn N. Spencer, Jr. · 2 companies · 1 sharedJohn N. Spencer, …Carol J. Barbre · 1 companies · 1 sharedCarol J. BarbrePtc Therapeutics, Inc. · $483.4M raisedPtc Therapeutics, Inc.Mri Interventions, Inc. · $90.0M raisedMri Interventions, In…Matthew B. KleinMK
Matthew B. Klein Company Co-operator (ring = serial)Hover to isolate ties · click to open
Co-operators (shared boards)

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

OperatorSharedTheir companies
Parker H. Petit15
B. KRISTINE JOHNSON15
Jerome B. Zeldis15
R. John Fletcher14
Charles E. Koob13
Pascal E.R. Girin13
Peter P. Svennilson12
Andrew K Rooke12
Francis P. Grillo12
John N. Spencer, Jr.12
Charles L. Koob12
Bruce C. Conway12
Jerome B. Zeldis, M.D., Ph.D.12
Axel P. Bolte11
Michael P. Kranda11
Michael S. Schmertzler11
David P. Southwell11
Stuart W. Peltz11
Allan S. Jacobson11
Soren P. Carlsen11

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.