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 4 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 |
|---|---|---|---|---|---|
| 2020-04-09 | RDIB | Mixed | +2,637 | $39.6K | EDGAR |
| 2015-11-06 | RDIB | Sell (S) | +2 | $33 | EDGAR |
| 2011-07-18 | RDIB | Sell (S) | −39,050 | -$164.4K | EDGAR |
| 2011-07-13 | RDIB | Sell (S) | −31,747 | -$133.8K | EDGAR |
| 2011-07-06 | RDIB | Sell (S) | −9,400 | -$42.8K | EDGAR |
| 2011-06-30 | RDIB | Sell (S) | −58,803 | -$268.5K | EDGAR |
| 2011-06-27 | RDIB | Sell (S) | −75,836 | -$359.7K | EDGAR |
| 2011-02-17 | RDIB | Sell (S) | −213,000 | -$1.06M | EDGAR |
| 2009-06-23 | READING INTERNATIONAL INC (RDI.B) Delisted | Buy (P) | +550,100 | $2.60M | EDGAR |
| 2007-03-09 | — | Buy (P) | +2,672 | $5.3K |
Showing 31–40 of 40
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Page 4 of 4
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.