People · Operator
Named in public records as an officer, director or promoter · active 2009–2014 · Other Energy, Other Technology
| Company | Role | Sector | Stage | Raised · real | Value · est | Tied |
|---|---|---|---|---|---|---|
| Arista Power, Inc. | — | Other Energy | Series A | $22.6M | $15.9M | 2014 |
| Document Security Systems Inc | — | Other Technology | Seed | $8.9M | $93.7M | 2009 |
Ira A. Greenstein 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 Ira A. Greenstein on the same companies — an interlock signal (shared founding team, board, or fund). Name-matched, so verify before acting.
| Operator | Shared | Their companies |
|---|---|---|
| David Klein | 1 | 10 |
| John Cronin | 1 | 8 |
| Philip Jones | 1 | 5 |
| Patrick White | 1 | 3 |
| Ira Greenstein | 1 | 3 |
| Robert Fagenson | 1 | 2 |
| Roger O'Brien | 1 | 2 |
| Gerald E. Brock | 1 | 2 |
| Adeeb A Saba | 1 | 1 |
| Pierre A Leignadier | 1 | 1 |
| George A Naselaris | 1 | 1 |
| David Wicker | 1 | 1 |
| Robert Bzdick | 1 | 1 |
| Timothy Ashman | 1 | 1 |
| William A Schmitz | 1 | 1 |
| Mark A Matthews | 1 | 1 |
| John E. Blake | 1 | 1 |
| John A Blake | 1 | 1 |
| Alan Harrison | 1 | 1 |
| Steven A DiNunzio | 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.