People · Operator
Named in public records as an officer, director or promoter · active 2012–2025 · Manufacturing, Healthtech, Other Technology, Biotechnology, Construction
| Company | Role | Sector | Stage | Raised · real | Value · est | Tied |
|---|---|---|---|---|---|---|
| Braidy Industries, Inc. | — | Manufacturing | Growth/Late | $401.1M | $4.7B | 2018 |
| ExThera Medical Corp | — | Healthtech | Series B | $62.8M | $10.0M | 2024 |
| Nanoscale Components, Inc. | — | Other Technology | Series A | $27.1M | $249.6M | 2012 |
| Rion LLC | — | Biotechnology | Series B | $25.4M | $693.5M | 2017 |
| Vantem Global Inc. | — | Other Technology | Series A | $11.6M | $129.2M | 2021 |
| Heat2Power Inc. | — | Other Technology | Seed | $3.0M | $11.7M | 2025 |
| Vantem Composite Technologies LLC | — | Construction | Pre-Seed | $500K | $4.7M | 2019 |
John Preston 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.
People named alongside John Preston on the same companies — an interlock signal (shared founding team, board, or fund). Name-matched, so verify before acting.
| Operator | Shared | Their companies |
|---|---|---|
| Chris Anderson | 2 | 5 |
| Robert Grant | 1 | 12 |
| Steve Gorlin | 1 | 11 |
| Robert Ward | 1 | 10 |
| David Schroeder | 1 | 5 |
| Charles Farrahar | 1 | 4 |
| Shad Azimi | 1 | 4 |
| Michael Porter | 1 | 3 |
| John T. Preston | 1 | 3 |
| Charles Price | 1 | 3 |
| John O'Sullivan | 1 | 2 |
| Weston Quasha | 1 | 2 |
| Daniel Cooperman | 1 | 2 |
| Christopher Schuh | 1 | 2 |
| GREG OLSEN | 1 | 2 |
| Ronald Wohl | 1 | 2 |
| David Gruber | 1 | 2 |
| John Feik | 1 | 2 |
| Erin Borger | 1 | 2 |
| Peter Gerhard | 1 | 2 |
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.