People · Operator
Named in public records as an officer, director or promoter · active 2009–2025 · Biotechnology, Software / Tech, Biotech, Other Health Care, Other Technology
| Company | Role | Sector | Stage | Raised · real | Value · est | Tied |
|---|---|---|---|---|---|---|
| Arsenal Biosciences, Inc. | — | Biotechnology | Series D+ | $579.2M | $3.5B | 2020 |
| Cardiodx Inc | — | Biotechnology | Series C | $174.0M | $742.4M | 2010 |
| Enjoy Technology, Inc. | — | Software / Tech | Series C | $151.5M | $2.4B | 2014 |
| Octave Bioscience Inc | — | Biotech | Series B | $105.8M | $169.5M | 2014 |
| OptiMedica Corp | — | Other Health Care | Series B | $90.3M | $775.4M | 2009 |
| XDx, Inc. | — | Biotechnology | Series B | $44.5M | $879.9M | 2010 |
| Oculeve, Inc. | — | Other Health Care | Series B | $33.2M | $368.9M | 2012 |
| Cell Design Labs, Inc. | — | Biotechnology | Series B | $26.9M | $158.8M | 2016 |
| Newsela, Inc. | — | Other Technology | Series A | $22.4M | $416.1M | 2015 |
| Veracyte, Inc. | — | Other Health Care | Series A | $22.1M | $258.2M | 2010 |
| Zephyr Health, Inc. | — | Other Health Care | Series B | $17.5M | $387.2M | 2015 |
| Epiodyne, Inc. | — | Biotechnology | Series A | $14.3M | $289.2M | 2017 |
| Hx Diagnostics Inc | — | Other Health Care | Series A | $4.7M | $93.8M | 2009 |
Brook Byers 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 Brook Byers on the same companies — an interlock signal (shared founding team, board, or fund). Name-matched, so verify before acting.
| Operator | Shared | Their companies |
|---|---|---|
| Beth Seidenberg | 3 | 15 |
| Fred Cohen | 3 | 12 |
| Michael Goldberg | 2 | 11 |
| Risa Stack | 2 | 9 |
| Brian Atwood | 2 | 6 |
| William Hagstrom | 2 | 4 |
| David Levison | 2 | 3 |
| Brook H Byers | 2 | 3 |
| Mark Blumenkranz | 2 | 3 |
| Michael Marks | 1 | 20 |
| Ali Behbahani | 1 | 17 |
| Craig Taylor | 1 | 13 |
| William Link | 1 | 11 |
| Fred Harman | 1 | 11 |
| Peter Bell | 1 | 11 |
| Sean Parker | 1 | 10 |
| Patrick Enright | 1 | 10 |
| Vijay Lathi | 1 | 8 |
| Douglas Crawford | 1 | 8 |
| Brian G. Atwood | 1 | 8 |
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.