People · Operator

William J. Sieper

Named in public records as an officer, director or promoter · active 2008–2018 · Other Technology

1
Companies
15
Filings
$6.7M
Combined raised · real
Single
Operator type
Companies
CompanyRoleSectorStageRaised · realValue · estTied
Crystalplex CorpOther TechnologySeed$6.7M$11.1M2008
Operator network

William J. Sieper 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.

Thomas Petzinger · 2 companies · 1 sharedThomas PetzingerCharles J. O'Hanlon · 1 companies · 1 sharedCharles J. O'Hanl…Charles J. Wozniak · 1 companies · 1 sharedCharles J. WozniakCharles Wozniak · 1 companies · 1 sharedCharles WozniakGregory J. Hebrank · 1 companies · 1 sharedGregory J. HebrankLianhua J. Qu · 1 companies · 1 sharedLianhua J. QuLianhua Qu · 1 companies · 1 sharedLianhua QuMatthew Bootman · 1 companies · 1 sharedMatthew BootmanMatthew Oristano · 1 companies · 1 sharedMatthew OristanoWilliam J. Mitchell · 1 companies · 1 sharedWilliam J. Mitche…Crystalplex Corp · $6.7M raisedCrystalplex CorpWilliam J. SieperWS
William J. Sieper Company Co-operator (ring = serial)Hover to isolate ties · click to open
Co-operators (shared boards)

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

OperatorSharedTheir companies
Thomas Petzinger12
Matthew Bootman11
Matthew Oristano11
Lianhua J. Qu11
Lianhua Qu11
Charles Wozniak11
Gregory J. Hebrank11
Charles J. O'Hanlon11
Charles J. Wozniak11
William J. Mitchell11

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.