MARK CUBAN
CIK 1066154 · last filed 2023-09-15
"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
$1.38M
Companies
2
Total Filings
40
Lifetime Open-Market Net
-$271.8K
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 |
|---|---|---|---|---|---|---|---|
| RDIB | 10%+ Owner | 172,555 | $8.01 | $1.38M | -$2.87M | 27 | 2023-09-15 |
| READING INTERNATIONAL INC (RDI.B) Delisted | 10%+ Owner | 207,511 | — | — | $2.60M | 1 | 2009-06-23 |
Recent Filings · Page 3 of 4
40 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 |
|---|---|---|---|---|---|
| 2023-07-07 | RDIB | Sell (S) | −6,126 | -$139.3K | EDGAR |
| 2023-07-06 | RDI | Notice (144) | −3,100 | -$70.5K | EDGAR |
| 2023-07-06 | RDIB | Sell (S) | −2,200 | -$51.7K | EDGAR |
| 2023-07-06 | RDIB | Sell (S) | −2,200 | -$51.7K | EDGAR |
| 2023-07-05 | RDI | Notice (144) | −3,026 | -$68.7K | EDGAR |
| 2023-07-05 | RDIB | Sell (S) | +1,672 | $21.8K | EDGAR |
| 2023-07-03 | RDI | Notice (144) | −2,200 | -$51.7K | EDGAR |
| 2023-06-30 | RDI | Notice (144) | −400 | -$9.3K | EDGAR |
| 2022-09-30 | RDIB | Sell (S) | −936 | -$21.5K | EDGAR |
| 2022-08-22 | RDIB | Sell (S) | −4,009 | -$118.9K | 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.