People · Operator
Named in public records as an officer, director or promoter · active 2012–2020 · Software / Tech, Other, Hospitals and Physicians
| Company | Role | Sector | Stage | Raised · real | Value · est | Tied |
|---|---|---|---|---|---|---|
| Turntide Technologies Inc. | — | Software / Tech | Series C | $171.2M | $2.2B | 2017 |
| 6AM City, LLC | — | Other | Series A | $15.3M | $56.8M | 2017 |
| Victory Medical Center Plano, LP | — | Hospitals and Physicians | Seed | $4.0M | $92.2M | 2012 |
Mark Johnston 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 Mark Johnston on the same companies — an interlock signal (shared founding team, board, or fund). Name-matched, so verify before acting.
| Operator | Shared | Their companies |
|---|---|---|
| Shvetank Jain | 1 | 7 |
| Robert, Jr. N. Helms | 1 | 6 |
| Chris Rivest | 1 | 5 |
| Steve Williams | 1 | 4 |
| Greg Smithies | 1 | 3 |
| Richard Linder | 1 | 3 |
| Adam Ostrow | 1 | 3 |
| Sergey Polikarpov | 1 | 3 |
| Ryan Johnston | 1 | 2 |
| Kim Kolt | 1 | 2 |
| Ryan Morris | 1 | 2 |
| Nilesh Patel | 1 | 2 |
| Karen Sperduti | 1 | 1 |
| MATTHEW SAMOST | 1 | 1 |
| RYAN HEAFY | 1 | 1 |
| Christopher Fink | 1 | 1 |
| Jeff Ludwig | 1 | 1 |
| Douglas Greenlaw | 1 | 1 |
| Prith Banerjee | 1 | 1 |
| Gordon Hunter | 1 | 1 |
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.