Ivan G Seidenberg
CIK 1187727 · Chairman · last filed 2026-02-19
Ivan G Seidenberg is a Chairman who has filed 232 SEC Form 4 insider transactions across 7 companies since 2007. The most recent filing, for MSGS, was dated Feb 19, 2026. Across all open-market trades the lifetime net is −$8.8M, making them a net seller over the disclosed history. Current disclosed insider exposure totals $17.6M across reported positions. 13 SEC filings were submitted jointly with Madison Square Garden Sports Corp.
"Disclosed insider exposure" sums this person's most-recently-reported share counts across each company they're an insider in, multiplied by the current underlying price. It is not net worth — it misses retail holdings, private investments, real estate, index funds, and any company where the person isn't an SEC-reporting insider. For informational purposes only.
Charts
Trading activity, where the exposure sits, and each trade against the stock price.
WWVY price and trades
Daily close with each Form 4 filing on this company marked: green = open-market buy, red = open-market sale, purple = grants, exercises, gifts and other non-market transactions. Marker size scales with the dollar value.
Shares held
Shares owned after each reported transaction on this company (direct holdings as reported).
Open-market buying and selling
by monthDollar value of open-market purchases (code P, up) and sales (code S, down) across all companies, by filing month. Grants, exercises and gifts are excluded.
Exposure by company
latestMost recently reported shares × current price. Faded bars (*) have had no filing in 3 years, so the person may no longer hold them. Click a bar to chart that company.
Filer Profile
140 WEST STREET, 29TH FLOOR
NEW YORK, NY 10007
Holdings By Company
| Symbol | Role | Shares | Price | Disclosed Exposure | Lifetime OM Net | Filings | Latest Filed |
|---|---|---|---|---|---|---|---|
| MSGS | Director | — | $396.10 | — | $0 | 12 | 2026-02-19 |
| PWP | Director | 9,476 | $13.26 | $125.7K | $0 | 2 | 2022-05-26 |
| BLK | Director | 14,434 | $1134.38 | $16.37M | $0 | 36 | 2020-04-02 |
| BXP | Director | 9,038 | $59.20 | $535.0K | $0 | 17 | 2016-05-02 |
| VERIZON COMMUNICATIONS INC (WWVY) Delisted | Chairman | 629,218 | — | — | -$8.78M | 139 | 2011-12-27 |
| HON | Director | 2,755 | $211.41 | $582.4K | $0 | 20 | 2008-02-27 |
| WYETH (WYE) Delisted | Director | 8,086 | — | — | $0 | 6 | 2008-01-23 |
Recent Filings
232 filings| Filed | Symbol | Action | Net Shares | Net $ | Link |
|---|---|---|---|---|---|
| 2026-02-19 | MSGS | Grant (A) | — | $0 | EDGAR |
| 2025-12-10 | MSGS | Grant (A) | — | $0 | EDGAR |
| 2025-02-20 | MSGS | Grant (A) | — | $0 | EDGAR |
| 2024-12-06 | MSGS | Grant (A) | — | $0 | EDGAR |
| 2024-02-16 | MSGS | Grant (A) | — | $0 | EDGAR |
| 2023-12-12 | MSGS | Grant (A) | — | $0 | EDGAR |
| 2023-02-17 | MSGS | Grant (A) | — | $0 | EDGAR |
| 2022-12-13 | MSGS | Grant (A) | — | $0 | EDGAR |
| 2022-05-26 | PWP | Grant (A) | +13,859 | $0 | EDGAR |
| 2022-02-17 | MSGS | Grant (A) | — | $0 | EDGAR |
Notice (144 / 144/A): Form 144 is a notice of intent to sell restricted/control stock under Rule 144, filed before the sale; 144/A is an amendment. Many notices are pre-scheduled under Rule 10b5-1 plans. A Form 4 with code S typically follows within a few days when the planned sale executes; missing follow-up Form 4s suggest the notice was cancelled or modified.