People · Operator

William Sealy

Named in public records as an officer, director or promoter · active 2025–2025 · Other Technology

1
Companies
2
Filings
$21.2M
Combined raised · real
Single
Operator type
Companies
CompanyRoleSectorStageRaised · realValue · estTied
Summer, PBC—Other TechnologySeries B$21.2M$120.8M2025
Operator network

William Sealy 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.

Josh Tanenbaum · 2 companies · 1 sharedJosh TanenbaumDan Macklin · 1 companies · 1 sharedDan MacklinSummer, PBC · $21.2M raisedSummer, PBCWilliam SealyWS
William Sealy Company Co-operator (ring = serial)Hover to isolate ties · click to open
Co-operators (shared boards)

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

OperatorSharedTheir companies
Josh Tanenbaum12
Dan Macklin11

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.