People · Operator
Named in public records as an officer, director or promoter · active 2009–2024 · Other Health Care, Biotechnology, Retailing, Biotech, Mining & Resources
| Company | Role | Sector | Stage | Raised · real | Value · est | Tied |
|---|---|---|---|---|---|---|
| Castlight Health, Inc. | — | Other Health Care | Series C | $177.0M | $2.3B | 2012 |
| Spear Bio Inc. | — | Biotechnology | Series C | $50.1M | $391.9M | 2024 |
| giggle, Inc. | — | Retailing | Series A | $47.5M | $41.8M | 2012 |
| Volta Labs, Inc. | — | Biotech | Series B | $37.7M | $112.3M | 2022 |
| Xoft Inc | — | Other Health Care | Series A | $12.1M | $16.2M | 2009 |
| Seer Biosciences, Inc. | — | Biotechnology | Series A | $6.0M | $216.9M | 2017 |
| Talon Metals Corp. | — | Mining & Resources | Seed | $2.3M | $7.6M | 2020 |
David Singer 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 David Singer on the same companies — an interlock signal (shared founding team, board, or fund). Name-matched, so verify before acting.
| Operator | Shared | Their companies |
|---|---|---|
| Robert Langer | 1 | 36 |
| Bryan Roberts | 1 | 18 |
| John Friedman | 1 | 9 |
| Terrance McGuire | 1 | 9 |
| Michael Klein | 1 | 9 |
| Ann H. Lamont | 1 | 6 |
| Robert Kocher | 1 | 5 |
| Jeffrey Bird | 1 | 5 |
| Giovanni Colella | 1 | 4 |
| John Wu | 1 | 4 |
| Omid Farokhzad | 1 | 4 |
| Arda Minocherhomjee | 1 | 4 |
| Paul Farmer | 1 | 3 |
| Peng Yin | 1 | 3 |
| Randy Womack | 1 | 3 |
| Vikram Bajaj | 1 | 3 |
| DAVID EBERSMAN | 1 | 3 |
| Michael Natan | 1 | 3 |
| Natan Linder | 1 | 3 |
| Riad Abrahams | 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.