Seidenberg Ivan G
SEC-identified person · CIK 1187727 Identifier-verified
Public-company roles (from insider filings)
| Company | Capacity as filed | Filings |
|---|---|---|
| Madison Square Garden Sports Corp. MSGS | Director | filed 2020–2026 |
| Perella Weinberg Partners PWP | Director | filed 2021–2022 |
| Blackrock, Inc. BLK | Director | filed 2011–2020 |
| BXP, Inc. BXP | Director | filed 2014–2016 |
| Boston Properties LTD Partnership N/A | Director | filed 2014–2014 |
| Verizon Communications INC VZ | Director · Chairman and CEO | filed 2006–2011 |
| Honeywell International INC [HON] | Director | filed 2006–2008 |
| Wyeth WYE | Director | filed 2006–2008 |
All roles under one Commission-assigned identifier - the same person by the SEC's own record, not by name matching. From the SEC's insider-transaction filings (Forms 3, 4 and 5). Every reporting director and officer carries a Commission-assigned identifier (CIK), so these footprints are identifier-verified - no name matching involved. Insiders file when they transact, so dates are filing dates: "last filed" never means "served until". This layer is not yet joined to the nonprofit register - identity joins ship only after independent review.