People · Operator

William J. Rieflin

Named in public records as an officer, director or promoter · active 2012–2024 · Biotechnology, Pharmaceuticals

4
Companies
11
Filings
$751.5M
Combined raised · real
Serial
Operator type
Companies
CompanyRoleSectorStageRaised · realValue · estTied
Ngm Biopharmaceuticals IncBiotechnologySeries D+$341.3M$4.4B2013
RAPT Therapeutics, Inc.BiotechnologySeries D+$317.0M$1.4B2016
NGM Bio Holdings, Inc.BiotechnologySeries C$73.2M$650.5M2024
Xenoport IncPharmaceuticalsSeries B$20.0M$680.1M2012
Operator network

William J. Rieflin 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.

Helen Kim · 2 companies · 1 sharedHelen KimPeter V. Svennilson · 2 companies · 1 sharedPeter V. Svennils…Arthur D. Levinson · 1 companies · 1 sharedArthur D. LevinsonArthur V. Levinson · 1 companies · 1 sharedArthur V. LevinsonDavid Goeddel · 10 companies · 2 sharedDavid GoeddelDavid V. Goeddel · 2 companies · 2 sharedDavid V. GoeddelBeth Seidenberg · 15 companies · 1 sharedBeth SeidenbergBrian Wong · 2 companies · 1 sharedBrian WongMichael Giordano · 2 companies · 1 sharedMichael GiordanoBeth V. Seidenberg · 1 companies · 1 sharedBeth V. SeidenbergRoger M Perlmutter · 3 companies · 1 sharedRoger M PerlmutterShelly D. Guyer · 3 companies · 1 sharedShelly D. GuyerHsiao D. Lieu · 2 companies · 1 sharedHsiao D. LieuCarole M. Ho · 1 companies · 1 sharedCarole M. HoJohn G. Freund · 6 companies · 1 sharedJohn G. FreundDavid R. Savello · 2 companies · 1 sharedDavid R. SavelloJeryl L. Hilleman · 2 companies · 1 sharedJeryl L. HillemanPaul L. Berns · 2 companies · 1 sharedPaul L. BernsVincent J. Angotti · 2 companies · 1 sharedVincent J. AngottiWendell J. Wierenga · 2 companies · 1 sharedWendell J. Wieren…William G. Harris · 2 companies · 1 sharedWilliam G. HarrisCatherine J. Friedman · 1 companies · 1 sharedCatherine J. Frie…Ngm Biopharmaceuticals Inc · $341.3M raisedNgm Biopharmaceutical…RAPT Therapeutics, Inc. · $317.0M raisedRAPT Therapeutics, In…NGM Bio Holdings, Inc. · $73.2M raisedNGM Bio Holdings, Inc.Xenoport Inc · $20.0M raisedXenoport IncWilliam J. RieflinWR
William J. Rieflin Company Co-operator (ring = serial)Hover to isolate ties · click to open
Co-operators (shared boards)

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

OperatorSharedTheir companies
David Goeddel210
David V. Goeddel22
Beth Seidenberg115
John G. Freund16
Roger M Perlmutter13
Shelly D. Guyer13
William G. Harris12
Michael Giordano12
Wendell J. Wierenga12
Brian Wong12
Hsiao D. Lieu12
David R. Savello12
Vincent J. Angotti12
Paul L. Berns12
Jeryl L. Hilleman12
Helen Kim12
Peter V. Svennilson12
Gregory T. Bates11
Ronald W. Barrett11
Ernest L. Mario11

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.