People · Operator

JOSEPH S. ZAKRZEWSKI

Named in public records as an officer, director or promoter · active 2010–2026 · Biotechnology, Pharmaceuticals

6
Companies
9
Filings
$438.5M
Combined raised · real
Serial
Operator type
Companies
CompanyRoleSectorStageRaised · realValue · estTied
Cerecin Inc.BiotechnologySeries C$162.0M$34.1M2021
Cyteir Therapeutics, Inc.BiotechnologySeries C$111.9M$2.6B2021
Acceleron Pharma IncBiotechnologySeries B$70.0M$396.9M2011
Promedior IncPharmaceuticalsSeries B$46.3M$739.9M2010
AN2 Therapeutics, Inc.PharmaceuticalsSeries B$40.0M$143.6M2026
Gliacure, Inc.BiotechnologySeries A$8.4M$57.0M2014
Operator network

JOSEPH S. ZAKRZEWSKI 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.

Walter Dewey · 3 companies · 1 sharedWalter DeweySteve Orndorff · 3 companies · 1 sharedSteve OrndorffThomas Werner · 3 companies · 1 sharedThomas WernerGunnar Weikert · 2 companies · 1 sharedGunnar WeikertJean George · 6 companies · 1 sharedJean GeorgeKaren Hong · 4 companies · 1 sharedKaren HongKevin Mills · 4 companies · 1 sharedKevin MillsJanwillem Naesens · 3 companies · 1 sharedJanwillem NaesensBarry Mills · 2 companies · 1 sharedBarry MillsCARL L. GORDON · 7 companies · 1 sharedCARL L. GORDONTERRANCE G. MCGUIRE · 7 companies · 1 sharedTERRANCE G. MCGUI…Anthony B. Evnin · 4 companies · 1 sharedAnthony B. EvninEdwin M. Kania, Jr. · 4 companies · 1 sharedEdwin M. Kania, J…PETER COUROSSI · 4 companies · 1 sharedPETER COUROSSIEDWIN M. KANIA · 3 companies · 1 sharedEDWIN M. KANIAJASBIR SEEHRA · 2 companies · 1 sharedJASBIR SEEHRAJean M. George · 2 companies · 1 sharedJean M. GeorgeAmir Nashat · 14 companies · 1 sharedAmir NashatJoseph Zakrzewski · 6 companies · 1 sharedJoseph ZakrzewskiJames W. Broderick · 5 companies · 1 sharedJames W. BroderickHarold R. Werner · 4 companies · 1 sharedHarold R. WernerJohn H. Friedman · 3 companies · 1 sharedJohn H. FriedmanCerecin Inc. · $162.0M raisedCerecin Inc.Cyteir Therapeutics, Inc. · $111.9M raisedCyteir Therapeutics, …Acceleron Pharma Inc · $70.0M raisedAcceleron Pharma IncPromedior Inc · $46.3M raisedPromedior IncAN2 Therapeutics, Inc. · $40.0M raisedAN2 Therapeutics, Inc.Gliacure, Inc. · $8.4M raisedGliacure, Inc.JOSEPH S. ZAKRZEWSKIJZ
JOSEPH S. ZAKRZEWSKI Company Co-operator (ring = serial)Hover to isolate ties · click to open
Co-operators (shared boards)

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

OperatorSharedTheir companies
Amir Nashat114
CARL L. GORDON17
TERRANCE G. MCGUIRE17
Jean George16
Joseph Zakrzewski16
James W. Broderick15
Harold R. Werner14
Karen Hong14
PETER COUROSSI14
Anthony B. Evnin14
Kevin Mills14
Edwin M. Kania, Jr.14
Steve Orndorff13
Thomas Werner13
Walter Dewey13
EDWIN M. KANIA13
John H. Friedman13
Janwillem Naesens13
Jean M. George12
JASBIR SEEHRA12

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.