People · Operator

Jonathan Rowntree

Named in public records as an officer, director or promoter · active 2023–2023 · Other Technology

1
Companies
2
Filings
$106.0M
Combined raised · real
Single
Operator type
Companies
CompanyRoleSectorStageRaised · realValue · estTied
Niron Magnetics, Inc.Other TechnologySeries C$106.0M$995.3M2023
Operator network

Jonathan Rowntree 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.

David Seldin · 11 companies · 1 sharedDavid SeldinAmit Shah · 10 companies · 1 sharedAmit ShahDavid Michael · 6 companies · 1 sharedDavid MichaelFrancis Thibodeau · 2 companies · 1 sharedFrancis ThibodeauJimmy Kan · 2 companies · 1 sharedJimmy KanDAVID A. SELDIN · 1 companies · 1 sharedDAVID A. SELDINDonald Rosenberg · 1 companies · 1 sharedDonald RosenbergJIANPING A. WANG · 1 companies · 1 sharedJIANPING A. WANGJianping Wang · 1 companies · 1 sharedJianping WangLawrence Burns · 1 companies · 1 sharedLawrence BurnsLEONARD A. BLACKBURN · 1 companies · 1 sharedLEONARD A. BLACKB…Leonard Anderson Blackburn · 1 companies · 1 sharedLeonard Anderson …Steve Bullock · 1 companies · 1 sharedSteve BullockNiron Magnetics, Inc. · $106.0M raisedNiron Magnetics, Inc.Jonathan RowntreeJR
Jonathan Rowntree Company Co-operator (ring = serial)Hover to isolate ties · click to open
Co-operators (shared boards)

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

OperatorSharedTheir companies
David Seldin111
Amit Shah110
David Michael16
Francis Thibodeau12
Jimmy Kan12
Leonard Anderson Blackburn11
JIANPING A. WANG11
DAVID A. SELDIN11
LEONARD A. BLACKBURN11
Jianping Wang11
Lawrence Burns11
Donald Rosenberg11
Steve Bullock11

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.