Gallagher Thomas P. — SEC Form 4 filings
SEC reporting owner CIK 2080477. 17 Form 4 filings on record with FilingPulse; latest filed 2026-09-04.
Transaction summary — filings shown
Covers all 17 filings on record, filed 2025-08-15 to 2026-09-04. Counts and totals are arithmetic on values as filed — descriptive data, not a recommendation.
- Open-market purchases (code P, non-derivative): 1 leg across 1 filing — 12,000 shares, $276,000 total (shares × price as filed).
- Open-market sales (code S, non-derivative): 12 legs across 9 filings — 749,059 shares, $32,301,033 total (shares × price as filed).
- Other reported legs (grants, option exercises, tax withholding, gifts, derivative-security transactions, …): 60.
- Largest priced transaction: sale of 149,700 shares @ $41.13 ($6,157,161) in MIAMI INTERNATIONAL HOLDINGS, INC., filed 2026-08-20.
By issuer — same filings
Open-market purchase/sale legs on non-derivative securities, grouped by issuer. Role is as filed on the newest filing for that issuer. Dollar totals cover priced legs only (shares × price as filed). Ordered by priced transaction value, largest first.
| Issuer | Role (as filed) | Filings | Purchases (P) | Sales (S) | Other legs |
|---|---|---|---|---|---|
| MIAMI INTERNATIONAL HOLDINGS, INC. (MIAX) | Chairman & CEO, Director | 17 | 1 leg · 12,000 sh · $276,000 | 12 legs · 749,059 sh · $32,301,033 | 60 |
Form 4 filings — Gallagher Thomas P.
| Filed | Form | Issuer | Reported transactions | Source |
|---|---|---|---|---|
| 2026-09-04 | 4 | MIAMI INTERNATIONAL HOLDINGS, INC. (MIAX) | Option exercise (M): 47,000 @ $12 · Sale (S): 47,000 @ $42.43 · Option exercise (M): 16,666 @ $12 · Option exercise (M): 8,333 @ $12 · Option exercise (M): 13,140 @ $15.22 · Option exercise (M): 4,464 @ $22.40 · +5 more | EDGAR |
| 2026-08-20 | 4 | MIAMI INTERNATIONAL HOLDINGS, INC. (MIAX) | Tax withholding (F): 150,300 @ $42.41 · Sale (S): 149,700 @ $41.13 | EDGAR |
| 2026-08-06 | 4 | MIAMI INTERNATIONAL HOLDINGS, INC. (MIAX) | Option exercise (M): 48,334 @ $12 · Sale (S): 48,334 @ $45.69 · Option exercise (M): 48,334 (derivative) @ $0 | EDGAR |
| 2026-07-14 | 4 | MIAMI INTERNATIONAL HOLDINGS, INC. (MIAX) | Option exercise (M): 70,000 @ $12 · Sale (S): 70,000 @ $42.52 · Option exercise (M): 70,000 (derivative) @ $0 | EDGAR |
| 2026-07-07 | 4 | MIAMI INTERNATIONAL HOLDINGS, INC. (MIAX) | Option exercise (M): 41,772 @ $12 · Sale (S): 41,772 @ $42.09 · Option exercise (M): 28,228 @ $12 · Sale (S): 28,228 @ $42.27 · Option exercise (M): 41,772 (derivative) @ $0 · Option exercise (M): 28,228 (derivative) @ $0 | EDGAR |
| 2026-06-18 | 4 | MIAMI INTERNATIONAL HOLDINGS, INC. (MIAX) | Grant/award (A): 232,977 @ $0 · Grant/award (A): 2,485 (derivative) @ $0 · Grant/award (A): 237,175 (derivative) @ $0 | EDGAR |
| 2026-06-04 | 4 | MIAMI INTERNATIONAL HOLDINGS, INC. (MIAX) | Option exercise (M): 70,000 @ $12 · Sale (S): 70,000 @ $42.36 · Option exercise (M): 70,000 (derivative) @ $0 | EDGAR |
| 2026-05-13 | 4 | MIAMI INTERNATIONAL HOLDINGS, INC. (MIAX) | Option exercise (M): 24,999 @ $12 · Option exercise (M): 24,999 (derivative) @ $0 | EDGAR |
| 2026-05-07 | 4 | MIAMI INTERNATIONAL HOLDINGS, INC. (MIAX) | Option exercise (M): 15,771 @ $12 · Sale (S): 15,771 @ $47.92 · Option exercise (M): 15,771 (derivative) @ $0 | EDGAR |
| 2026-05-05 | 4 | MIAMI INTERNATIONAL HOLDINGS, INC. (MIAX) | Option exercise (M): 54,229 @ $12 · Sale (S): 54,229 @ $47.26 · Option exercise (M): 54,229 (derivative) @ $0 | EDGAR |
| 2026-04-17 | 4 | MIAMI INTERNATIONAL HOLDINGS, INC. (MIAX) | Option exercise (M): 70,001 @ $12 · Sale (S): 70,001 @ $43.36 · Sale (S): 104,124 @ $43.36 · Sale (S): 49,900 @ $43.68 · Option exercise (M): 70,001 (derivative) @ $0 | EDGAR |
| 2026-04-01 | 4 | MIAMI INTERNATIONAL HOLDINGS, INC. (MIAX) | Tax withholding (F): 20,875 @ $37.50 | EDGAR |
| 2026-02-12 | 4 | MIAMI INTERNATIONAL HOLDINGS, INC. (MIAX) | Tax withholding (F): 50,100 @ $41.33 | EDGAR |
| 2025-12-29 | 4 | MIAMI INTERNATIONAL HOLDINGS, INC. (MIAX) | Gift (G): 2,000 | EDGAR |
| 2025-08-28 | 4 | MIAMI INTERNATIONAL HOLDINGS, INC. (MIAX) | Tax withholding (F): 192,220 @ $33.90 | EDGAR |
| 2025-08-19 | 4 | MIAMI INTERNATIONAL HOLDINGS, INC. (MIAX) | Conversion (C): 500 · Conversion (C): 573,963 · Conversion (C): 135,395 · Conversion (C): 500 (derivative) @ $0 · Conversion (C): 573,963 (derivative) @ $0 · Conversion (C): 135,395 (derivative) @ $0 · +18 more | EDGAR |
| 2025-08-15 | 4 | MIAMI INTERNATIONAL HOLDINGS, INC. (MIAX) | Purchase (P): 12,000 @ $23 | EDGAR |
FilingPulse's Form 4 archive currently extends back to 2024-01-11 and is expanding backward through EDGAR history — earlier filings by this insider may not be indexed yet. Names and roles are shown as filed.
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