Company · CIK 0001438472 · SIC 6211 — Security Brokers, Dealers & Flotation Companies · NYSE
MIAMI INTERNATIONAL HOLDINGS, INC. · MIAX
Insider activity reported against this company. All insider holders · On EDGAR ↗
Reported at this company — common stock
| Trade | Reported (ET) | Insider | Shares | Avg price | Total | Owned after | Δ stake | Flags |
|---|---|---|---|---|---|---|---|---|
| Sep 16, 2026 SForm 4 → | Sep 17, 4:43 pm EDT | Shelly BrownEVP, Chief Strategy Officer | 21,217 | $38.61 | $819,188 | 316,490 | −6.28% | 10b5-1 |
| Sep 11, 2026 FForm 4 → | Sep 11, 4:23 pm EDT | Shelly BrownEVP, Chief Strategy Officer | 16,283 | $42.54 | $692,679 | 337,707 | — | |
| Sep 3, 2026 SForm 4 → | Sep 4, 4:35 pm EDT | Thomas P. GallagherChairman & CEO, Director | 47,000 | $42.43 | $1,994,210 | 1,423,275 | −3.20% | 10b5-1 |
| Sep 3, 2026 MForm 4 → | Sep 4, 4:35 pm EDT | Thomas P. GallagherChairman & CEO, Director | 89,603 | $12.99 | $1,163,972 | 786,542 | — | 10b5-1 |
| Sep 3, 2026 SForm 4 → | Sep 4, 4:28 pm EDT | Edward DeitzelEVP, CRO, CCO MIAX Exchanges | 11,000 | $42.21 | $464,310 | 119,601 | −8.42% | 10b5-1 |
| Sep 3, 2026 MForm 4 → | Sep 4, 4:28 pm EDT | Edward DeitzelEVP, CRO, CCO MIAX Exchanges | 11,000 | $12.00 | $132,000 | 130,601 | — | 10b5-1 |
| Sep 2, 2026 SForm 4 → | Sep 4, 4:31 pm EDT | Barbara J. ComlyEVP, GC & Corporate Secretary | 44,445 | $40.49 | $1,799,578 | 839,564 | −5.03% | 10b5-1 |
| Sep 2, 2026 MForm 4 → | Sep 4, 4:31 pm EDT | Barbara J. ComlyEVP, GC & Corporate Secretary | 44,445 | $12.00 | $533,340 | 884,009 | — | 10b5-1 |
| Sep 2, 2026 SForm 4 → | Sep 4, 4:25 pm EDT | Douglas M. Schafer Jr.EVP and CIO | 48,000 | $40.48 | $1,943,040 | 387,414 | −11.0% | 10b5-1 |
| Sep 2, 2026 MForm 4 → | Sep 4, 4:25 pm EDT | Douglas M. Schafer Jr.EVP and CIO | 48,000 | $12.00 | $576,000 | 435,414 | — | 10b5-1 |
| Sep 2, 2026 SForm 4 → | Sep 4, 4:21 pm EDT | Judson Gray TeekellDirector | 8,545 | $41.34 | $353,231 | 69,251 | −11.0% | 10b5-1 |
| Aug 19, 2026 SForm 4 → | Aug 20, 4:12 pm EDT | Thomas P. GallagherChairman & CEO, Director | 149,700 | $41.13 | $6,157,161 | 1,423,275 | −9.52% | 10b5-1 |
| Aug 18, 2026 FForm 4 → | Aug 20, 4:12 pm EDT | Thomas P. GallagherChairman & CEO, Director | 150,300 | $42.41 | $6,374,223 | 1,572,975 | — | 10b5-1 |
| Aug 18, 2026 FForm 4 → | Aug 20, 4:11 pm EDT | Barbara J. ComlyEVP, GC & Corporate Secretary | 43,420 | $42.41 | $1,841,442 | 839,564 | — | |
| Aug 17, 2026 SForm 4 → | Aug 19, 4:12 pm EDT | Cynthia SchwarzkopfDirector | 5,000 | $42.85 | $214,250 | 88,545 | −5.35% | 10b5-1 |
| Aug 17, 2026 MForm 4 → | Aug 19, 4:12 pm EDT | Cynthia SchwarzkopfDirector | 5,000 | $12.00 | $60,000 | 93,545 | — | 10b5-1 |
| Aug 17, 2026 SForm 4 → | Aug 19, 4:10 pm EDT | Lance EmmonsEVP and CFO | 35,000 | $42.83 | $1,499,050 | 86,538 | −28.8% | 10b5-1 |
| Aug 4, 2026 SForm 4 → | Aug 6, 4:11 pm EDT | Kurt M. EckertDirector | 1,063 | $45.80 | $48,685 | 149,612 | −0.71% | 10b5-1 |
| Aug 4, 2026 MForm 4 → | Aug 6, 4:11 pm EDT | Kurt M. EckertDirector | 1,063 | $12.00 | $12,756 | 150,675 | — | 10b5-1 |
| Aug 4, 2026 SForm 4 → | Aug 6, 4:10 pm EDT | Judson Gray TeekellDirector | 3,000 | $45.79 | $137,370 | 72,251 | −3.99% | 10b5-1 |
| Aug 4, 2026 SForm 4 → | Aug 6, 4:10 pm EDT | Harish JayabalanEVP, CISO and CRO | 20,000 | $45.90 | $918,000 | 78,065 | −20.4% | 10b5-1 |
| Aug 4, 2026 MForm 4 → | Aug 6, 4:10 pm EDT | Harish JayabalanEVP, CISO and CRO | 20,000 | $12.94 | $258,779 | 98,065 | — | 10b5-1 |
| Aug 4, 2026 SForm 4 → | Aug 6, 4:09 pm EDT | Barbara J. ComlyEVP, GC & Corporate Secretary | 44,445 | $45.69 | $2,030,692 | 882,984 | −4.79% | 10b5-1 |
| Aug 4, 2026 MForm 4 → | Aug 6, 4:09 pm EDT | Barbara J. ComlyEVP, GC & Corporate Secretary | 44,445 | $12.00 | $533,340 | 927,429 | — | 10b5-1 |
| Aug 4, 2026 SForm 4 → | Aug 6, 4:08 pm EDT | Edward DeitzelEVP, CRO, CCO MIAX Exchanges | 11,000 | $45.78 | $503,580 | 119,601 | −8.42% | 10b5-1 |
| Aug 4, 2026 MForm 4 → | Aug 6, 4:08 pm EDT | Edward DeitzelEVP, CRO, CCO MIAX Exchanges | 11,000 | $12.00 | $132,000 | 130,601 | — | 10b5-1 |
| Aug 4, 2026 SForm 4 → | Aug 6, 4:06 pm EDT | Douglas M. Schafer Jr.EVP and CIO | 48,000 | $45.71 | $2,194,080 | 387,414 | −11.0% | 10b5-1 |
| Aug 4, 2026 MForm 4 → | Aug 6, 4:06 pm EDT | Douglas M. Schafer Jr.EVP and CIO | 48,000 | $12.00 | $576,000 | 435,414 | — | 10b5-1 |
| Aug 4, 2026 SForm 4 → | Aug 6, 4:05 pm EDT | Thomas P. GallagherChairman & CEO, Director | 48,334 | $45.69 | $2,208,380 | 1,723,275 | −2.73% | 10b5-1 |
| Aug 4, 2026 MForm 4 → | Aug 6, 4:05 pm EDT | Thomas P. GallagherChairman & CEO, Director | 48,334 | $12.00 | $580,008 | 1,771,609 | — | 10b5-1 |
| Jul 15, 2026 SForm 4 → | Jul 16, 4:15 pm EDT | Cynthia SchwarzkopfDirector | 5,000 | $42.00 | $210,000 | 88,545 | −5.35% | 10b5-1 |
| Jul 15, 2026 MForm 4 → | Jul 16, 4:15 pm EDT | Cynthia SchwarzkopfDirector | 5,000 | $12.00 | $60,000 | 93,545 | — | 10b5-1 |
| Jul 13, 2026 SForm 4 → | Jul 14, 4:07 pm EDT | Barbara J. ComlyEVP, GC & Corporate Secretary | 28,000 | $41.98 | $1,175,440 | 882,984 | −3.07% | 10b5-1 |
| Jul 13, 2026 MForm 4 → | Jul 14, 4:07 pm EDT | Barbara J. ComlyEVP, GC & Corporate Secretary | 28,000 | $12.00 | $336,000 | 910,984 | — | 10b5-1 |
| Jul 13, 2026 SForm 4 → | Jul 14, 4:04 pm EDT | Thomas P. GallagherChairman & CEO, Director | 70,000 | $42.52 | $2,976,400 | 1,723,275 | −3.90% | 10b5-1 |
| Jul 13, 2026 MForm 4 → | Jul 14, 4:04 pm EDT | Thomas P. GallagherChairman & CEO, Director | 70,000 | $12.00 | $840,000 | 1,793,275 | — | 10b5-1 |
| Jul 8, 2026 FForm 4 → | Jul 9, 4:04 pm EDT | David A BrownDirector | 171 | $43.72 | $7,476 | 7,066 | — | |
| Jul 6, 2026 SForm 4 → | Jul 7, 5:03 pm EDT | Thomas P. GallagherChairman & CEO, Director | 70,000 | $42.16 | $2,951,381 | 1,723,275 | −3.90% | 10b5-1 |
| Jul 6, 2026 MForm 4 → | Jul 7, 5:03 pm EDT | Thomas P. GallagherChairman & CEO, Director | 70,000 | $12.00 | $840,000 | 1,751,503 | — | 10b5-1 |
| Jul 6, 2026 SForm 4 → | Jul 7, 4:14 pm EDT | Harish JayabalanEVP, CISO and CRO | 20,000 | $42.12 | $842,400 | 78,065 | −20.4% | 10b5-1 |
| Jul 6, 2026 MForm 4 → | Jul 7, 4:14 pm EDT | Harish JayabalanEVP, CISO and CRO | 20,000 | $12.00 | $240,000 | 98,065 | — | 10b5-1 |
| Jul 6, 2026 SForm 4 → | Jul 7, 4:13 pm EDT | Edward DeitzelEVP, CRO, CCO MIAX Exchanges | 11,000 | $42.04 | $462,440 | 119,601 | −8.42% | 10b5-1 |
| Jul 6, 2026 MForm 4 → | Jul 7, 4:13 pm EDT | Edward DeitzelEVP, CRO, CCO MIAX Exchanges | 11,000 | $12.00 | $132,000 | 130,601 | — | 10b5-1 |
| Jul 6, 2026 SForm 4 → | Jul 7, 4:10 pm EDT | Shelly BrownEVP, Chief Strategy Officer | 16,000 | $42.13 | $674,080 | 353,990 | −4.32% | 10b5-1 |
| Jul 6, 2026 MForm 4 → | Jul 7, 4:10 pm EDT | Shelly BrownEVP, Chief Strategy Officer | 16,000 | $12.00 | $192,000 | 369,990 | — | 10b5-1 |
| Jul 2, 2026 SForm 4 → | Jul 7, 4:09 pm EDT | Judson Gray TeekellDirector | 3,000 | $40.00 | $120,000 | 75,251 | −3.83% | 10b5-1 |
| Jul 2, 2026 SForm 4 → | Jul 7, 4:08 pm EDT | Kurt M. EckertDirector | 5,250 | $39.35 | $206,588 | 149,612 | −3.39% | 10b5-1 |
| Jul 2, 2026 MForm 4 → | Jul 7, 4:08 pm EDT | Kurt M. EckertDirector | 5,250 | $12.00 | $63,000 | 154,862 | — | 10b5-1 |
| Jul 2, 2026 SForm 4 → | Jul 7, 4:06 pm EDT | Barbara J. ComlyEVP, GC & Corporate Secretary | 28,000 | $41.22 | $1,154,160 | 882,984 | −3.07% | 10b5-1 |
| Jul 2, 2026 MForm 4 → | Jul 7, 4:06 pm EDT | Barbara J. ComlyEVP, GC & Corporate Secretary | 28,000 | $12.00 | $336,000 | 910,984 | — | 10b5-1 |
| Jul 2, 2026 SForm 4 → | Jul 7, 4:06 pm EDT | Douglas M. Schafer Jr.EVP and CIO | 48,000 | $41.22 | $1,978,560 | 387,414 | −11.0% | 10b5-1 |
| Jul 2, 2026 MForm 4 → | Jul 7, 4:06 pm EDT | Douglas M. Schafer Jr.EVP and CIO | 48,000 | $12.00 | $576,000 | 435,414 | — | 10b5-1 |
Reported at this company — derivatives (options, RSUs, warrants)
| Trade | Reported (ET) | Insider | Shares | Avg price | Total | Owned after | Δ stake | Flags |
|---|---|---|---|---|---|---|---|---|
| Sep 3, 2026 MForm 4 → | Sep 4, 4:35 pm EDT | Thomas P. GallagherChairman & CEO, Director | 89,603 | — | — | 8,928 | — | 10b5-1 |
| Sep 3, 2026 MForm 4 → | Sep 4, 4:28 pm EDT | Edward DeitzelEVP, CRO, CCO MIAX Exchanges | 11,000 | — | — | 66,000 | — | 10b5-1 |
| Sep 2, 2026 MForm 4 → | Sep 4, 4:31 pm EDT | Barbara J. ComlyEVP, GC & Corporate Secretary | 44,445 | — | — | 44,444 | — | 10b5-1 |
| Sep 2, 2026 MForm 4 → | Sep 4, 4:25 pm EDT | Douglas M. Schafer Jr.EVP and CIO | 48,000 | — | — | 195,334 | — | 10b5-1 |
| Aug 17, 2026 MForm 4 → | Aug 19, 4:12 pm EDT | Cynthia SchwarzkopfDirector | 5,000 | — | — | 11,916 | — | 10b5-1 |
| Aug 4, 2026 MForm 4 → | Aug 6, 4:11 pm EDT | Kurt M. EckertDirector | 1,063 | — | — | 0 | — | 10b5-1 |
| Aug 4, 2026 MForm 4 → | Aug 6, 4:10 pm EDT | Harish JayabalanEVP, CISO and CRO | 20,000 | — | — | 17,598 | — | 10b5-1 |
| Aug 4, 2026 MForm 4 → | Aug 6, 4:09 pm EDT | Barbara J. ComlyEVP, GC & Corporate Secretary | 44,445 | — | — | 88,889 | — | 10b5-1 |
| Aug 4, 2026 MForm 4 → | Aug 6, 4:08 pm EDT | Edward DeitzelEVP, CRO, CCO MIAX Exchanges | 11,000 | — | — | 77,000 | — | 10b5-1 |
| Aug 4, 2026 MForm 4 → | Aug 6, 4:06 pm EDT | Douglas M. Schafer Jr.EVP and CIO | 48,000 | — | — | 43,334 | — | 10b5-1 |
| Aug 4, 2026 MForm 4 → | Aug 6, 4:05 pm EDT | Thomas P. GallagherChairman & CEO, Director | 48,334 | — | — | 235,000 | — | 10b5-1 |
| Jul 15, 2026 MForm 4 → | Jul 16, 4:15 pm EDT | Cynthia SchwarzkopfDirector | 5,000 | — | — | 16,916 | — | 10b5-1 |
| Jul 13, 2026 MForm 4 → | Jul 14, 4:07 pm EDT | Barbara J. ComlyEVP, GC & Corporate Secretary | 28,000 | — | — | 0 | — | 10b5-1 |
| Jul 13, 2026 MForm 4 → | Jul 14, 4:04 pm EDT | Thomas P. GallagherChairman & CEO, Director | 70,000 | — | — | 0 | — | 10b5-1 |
| Jul 6, 2026 MForm 4 → | Jul 7, 5:03 pm EDT | Thomas P. GallagherChairman & CEO, Director | 70,000 | — | — | 70,000 | — | 10b5-1 |
| Jul 6, 2026 MForm 4 → | Jul 7, 4:14 pm EDT | Harish JayabalanEVP, CISO and CRO | 20,000 | — | — | 14,168 | — | 10b5-1 |
| Jul 6, 2026 MForm 4 → | Jul 7, 4:13 pm EDT | Edward DeitzelEVP, CRO, CCO MIAX Exchanges | 11,000 | — | — | 88,000 | — | 10b5-1 |
| Jul 6, 2026 MForm 4 → | Jul 7, 4:10 pm EDT | Shelly BrownEVP, Chief Strategy Officer | 16,000 | — | — | 0 | — | 10b5-1 |
| Jul 2, 2026 MForm 4 → | Jul 7, 4:08 pm EDT | Kurt M. EckertDirector | 5,250 | — | — | 1,063 | — | 10b5-1 |
| Jul 2, 2026 MForm 4 → | Jul 7, 4:06 pm EDT | Barbara J. ComlyEVP, GC & Corporate Secretary | 28,000 | — | — | 28,000 | — | 10b5-1 |
| Jul 2, 2026 MForm 4 → | Jul 7, 4:06 pm EDT | Douglas M. Schafer Jr.EVP and CIO | 48,000 | — | — | 91,334 | — | 10b5-1 |