Thomas P. Gallagher
CIK 2080477 · Chairman & CEO · last filed 2026-08-06
"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
$104.63M
Companies
1
Total Filings
19
Lifetime Open-Market Net
-$26.08M
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 |
|---|---|---|---|---|---|---|---|
| MIAX | Chairman & CEO | 2,467,214 | $42.41 | $104.63M | -$26.08M | 16 | 2026-08-06 |
Recent Filings · Page 2 of 2
19 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 |
|---|---|---|---|---|---|
| 2026-04-17 | MIAX | Mixed | −154,024 | -$8.89M | EDGAR |
| 2026-04-15 | MIAX | Notice (144) | −454,125 | -$19.49M | EDGAR |
| 2026-04-15 | MIAX | Notice (144) | −49,900 | -$2.14M | EDGAR |
| 2026-04-01 | MIAX | Tax (F) | −20,875 | -$782.8K | EDGAR |
| 2026-02-12 | MIAX | Tax (F) | −50,100 | -$2.07M | EDGAR |
| 2025-12-29 | MIAX | Gift (G) | −2,000 | $0 | EDGAR |
| 2025-08-28 | MIAX | Tax (F) | −192,220 | -$6.52M | EDGAR |
| 2025-08-19 | MIAX | Mixed | +709,858 | $0 | EDGAR |
| 2025-08-15 | MIAX | Buy (P) | +12,000 | $276.0K | EDGAR |
Showing 11–19 of 19
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Page 2 of 2
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.