People · Operator
Named in public records as an officer, director or promoter · active 2016–2021 · Other Technology
| Company | Role | Sector | Stage | Raised · real | Value · est | Tied |
|---|---|---|---|---|---|---|
| Spruce Holdings Inc. | — | Other Technology | Series C | $75.6M | $1.4B | 2018 |
| Staircase, Inc. | — | Other Technology | Series B | $22.9M | $427.1M | 2021 |
| Electric Objects Inc. | — | Other Technology | Series A | $8.1M | $39.5M | 2016 |
CHARLES BIRNBAUM 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 CHARLES BIRNBAUM on the same companies — an interlock signal (shared founding team, board, or fund). Name-matched, so verify before acting.
| Operator | Shared | Their companies |
|---|---|---|
| Stuart Ellman | 1 | 18 |
| CRAIG SHAPIRO | 1 | 15 |
| Bryan Wolff | 1 | 5 |
| Matthew McElhattan | 1 | 4 |
| Nick Hammerschlag | 1 | 4 |
| Alexander Niehenke | 1 | 4 |
| Patrick Burns | 1 | 4 |
| Adam Kalamchi | 1 | 2 |
| Nicholas Hammerschlag | 1 | 2 |
| Soofi Safavi | 1 | 1 |
| Andrew Weisgall | 1 | 1 |
| Jake Levine | 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.