MARK S SHAPIRO
CIK 1345978 · See Remarks · last filed 2026-08-19
"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
$40.43M
Companies
9
Total Filings
140
Lifetime Open-Market Net
-$58.72M
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 |
|---|---|---|---|---|---|---|---|
| TKO | See Remarks | 166,191 | $182.27 | $30.29M | -$18.21M | 11 | 2026-08-19 |
| EQR | Director | 23,636 | $63.66 | $1.50M | -$4.36M | 29 | 2026-06-23 |
| Endeavor Group Holdings, Inc. (EDR) Delisted | See Remarks | 251,990 | $29.25 | $7.37M | -$34.67M | 14 | 2025-02-25 |
| LYV | Director | 45,492 | $177.20 | $8.06M | -$1.66M | 16 | 2021-06-11 |
| Frontier Communications Parent, Inc. (FTR) Delisted | Director | 2,522 | — | — | $498.9K | 30 | 2019-04-02 |
| Frontier Communications Parent, Inc. (FTRPR) Delisted | Director | — | — | — | $0 | 6 | 2018-04-03 |
| PZZA | Director | 25,070 | $22.71 | $569.3K | -$448.9K | 11 | 2018-03-05 |
| Frontier Communications Parent, Inc. (FTRP.R) Delisted | Director | — | — | — | $0 | 4 | 2016-04-04 |
| Six Flags Entertainment Corp/OLD (SIX) Delisted | President, CEO | 6,610,384 | $32.00 | $211.53M | $128.2K | 4 | 2007-11-15 |
Recent Filings · Page 2 of 14
140 filingsInsider 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 |
|---|---|---|---|---|---|
| 2025-03-04 | EQR | Grant (A) | +1,598 | $100.0K | EDGAR |
| 2025-02-25 | — | Notice (144) | −23,610 | -$711.2K | EDGAR |
| 2025-02-25 | Endeavor Group Holdings, Inc. (EDR) Delisted | Mixed | +95,201 | -$2.95M | EDGAR |
| 2025-02-24 | — | Notice (144) | −74,525 | -$2.24M | EDGAR |
| 2025-01-17 | TKO | Grant (A) | — | $0 | EDGAR |
| 2025-01-06 | TKO | Mixed | +31,521 | -$4.49M | EDGAR |
| 2025-01-03 | TKO | Notice (144) | −63,187 | -$9.02M | EDGAR |
| 2024-09-16 | TKO | Notice (144) | −60,651 | -$7.09M | EDGAR |
| 2024-09-16 | TKO | Mixed | +29,625 | -$3.56M | EDGAR |
| 2024-06-24 | EQR | Grant (A) | — | $0 | EDGAR |
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.
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.