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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.

"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.

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Disclosed Exposure

$17.62M

Companies

7

Total Filings

232

Lifetime Open-Market Net

-$8.78M

Holdings By Company

Latest on-record share count from this person's most recent non-derivative Form 4 transaction in each company. Disclosed exposure = shares × current underlying price.
Symbol Role Shares Price Disclosed Exposure Lifetime OM Net Filings Latest Filed
MSGS Director — $381.69 — $0 12 2026-02-19
PWP Director 9,476 $16.40 $155.4K $0 2 2022-05-26
BLK Director 14,434 $1128.10 $16.28M $0 36 2020-04-02
BXP Director 9,038 $67.06 $606.1K $0 17 2016-05-02
VERIZON COMMUNICATIONS INC (WWVY) Delisted Chairman 629,218 — — -$8.78M 139 2011-12-27
HON Director 2,755 $209.98 $578.5K $0 20 2008-02-27
WYETH (WYE) Delisted Director 8,086 — — $0 6 2008-01-23

Recent Filings

232 filings
Insider activity across all companies, newest first. Form 4 rows are post-trade confirmations (buys, sells, grants, exercises). Notice (144) rows are pre-trade notices of intent to sell restricted or control stock under Rule 144 — they may not all execute. Compare adjacent dates to see which notices became actual sales.
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
Showing 1–10 of 232
Page 1 of 24
Form 4 codes: P = open-market purchase · S = open-market sale · A = grant/award · M = option exercise · F = tax withholding at vest · G = bona-fide gift · D = disposition to issuer · J = other (see filing footnote). Only P / S codes carry directional signal.
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.