MARK S SHAPIRO
CIK 1345978 · See Remarks · last filed 2026-05-13
MARK S SHAPIRO is a corporate insider who has filed 125 SEC Form 4 insider transactions across 10 companies since 2007. The most recent filing shows the insider bought $2.0M of TKO on May 13, 2026. Across all open-market trades the lifetime net is −$55.0M, making them a net seller over the disclosed history. Current disclosed insider exposure totals $35.3M 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.
$35.31M
10
125
-$55.00M
Holdings By Company
| Symbol | Role | Shares | Price | Disclosed Exposure | Lifetime OM Net | Filings | Latest Filed |
|---|---|---|---|---|---|---|---|
| TKO | See Remarks | 123,207 | $203.36 | $25.06M | -$14.49M | 10 | 2026-05-13 |
| EQR | Director | 23,636 | $67.34 | $1.59M | -$4.02M | 24 | 2025-07-03 |
| Endeavor Group Holdings, Inc. (EDR) Delisted | See Remarks | 251,990 | $29.25 | $7.37M | -$34.67M | 14 | 2025-02-25 |
| LYV | Director | 45,492 | $172.51 | $7.85M | -$1.66M | 16 | 2021-06-11 |
| Frontier Communications Parent, Inc. (FTR) Delisted | Director | 37,824 | — | — | $498.9K | 30 | 2019-04-02 |
| Frontier Communications Parent, Inc. (FTRPR) Delisted | Director | — | — | — | $0 | 6 | 2018-04-03 |
| PZZA | Director | 25,070 | $32.60 | $817.3K | -$448.9K | 11 | 2018-03-05 |
| Frontier Communications Parent, Inc. (FTRP.R) Delisted | Director | — | — | — | $0 | 4 | 2016-04-04 |
| EQUITY RESIDENTIAL (EQRpN) Delisted | Director | 3,158 | — | — | -$342.9K | 4 | 2012-06-22 |
| Six Flags Entertainment Corp/OLD (SIXpB) Delisted | President, CEO | 1,652,596 | — | — | $128.2K | 4 | 2007-11-15 |
Recent Filings
125 filings| Filed | Symbol | Action | Net Shares | Net $ | Link |
|---|---|---|---|---|---|
| 2026-05-13 | TKO | Buy (P) | +10,807 | $2.00M | EDGAR |
| 2026-01-22 | TKO | Mixed | +13,558 | -$2.90M | EDGAR |
| 2026-01-05 | TKO | Mixed | +31,165 | -$6.54M | EDGAR |
| 2025-08-19 | TKO | Grant (A) | — | $0 | EDGAR |
| 2025-07-03 | EQR | Grant (A) | — | $0 | EDGAR |
| 2025-03-26 | — | Mixed | −198,167 | -$9.55M | |
| 2025-03-04 | EQR | Grant (A) | +1,598 | $100.0K | EDGAR |
| 2025-02-25 | Endeavor Group Holdings, Inc. (EDR) Delisted | Mixed | +95,201 | -$2.95M | EDGAR |
| 2025-01-17 | TKO | Grant (A) | — | $0 | EDGAR |
| 2025-01-06 | TKO | Mixed | +31,521 | -$4.49M | EDGAR |