Miami International Holdings, Inc. (MIAX) · Insider trading
What Miami International Holdings's directors, officers and largest holders bought and sold themselves, from the Form 4 each of them files with the SEC within two business days of a trade. Open-market purchases and sales first: those are the trades somebody chose to make at the market price.
Bought, 12 months
$722,511
1 insider, 3 trades
Sold, 12 months
$76.56M
11 insiders, 97% under a plan
Net, 12 months
−$75.84M
bought less sold
Latest filing
2026-10-06
filings read to 2026-10-19
Who traded, two years
| Insider | Bought | Sold | Trades | Last trade | Holds after |
|---|---|---|---|---|---|
| Gallagher Thomas P.Director, Chairman & CEO | $276,000 | $32.30M | 13 | 2026-09-03 | – |
| Schafer Douglas M. JrEVP and CIO | – | $13.68M | 7 | 2026-10-02 | 387,414 |
| Comly Barbara J.EVP, GC & Corporate Secretary | – | $9.98M | 7 | 2026-09-02 | 839,564 |
| Brown ShellyEVP, Chief Strategy Officer | – | $4.98M | 9 | 2026-09-16 | 316,490 |
| Horizon Kinetics Asset Management LLCInsider | $1.97M | $2.19M | 7 | 2026-03-05 | – |
| Emmons LanceEVP and CFO | $126 | $3.47M | 3 | 2026-08-17 | 86,538 |
| Deitzel EdwardEVP, CRO, CCO MIAX Exchanges | $2,300 | $2.93M | 9 | 2026-09-03 | 119,601 |
| Jayabalan HarishEVP, CISO and CRO | $57,500 | $2.56M | 5 | 2026-08-04 | 78,065 |
| Eckert Kurt M.Director | – | $2.22M | 5 | 2026-08-04 | 149,612 |
| Schwarzkopf CynthiaDirector | – | $1.24M | 3 | 2026-08-17 | 88,545 |
| Teekell Judson GrayDirector | – | $1.00M | 8 | 2026-09-02 | – |
| Massad Mark I.Director | $184,000 | – | 4 | 2025-08-13 | 3,500 |
| Moore LisaDirector | $126,500 | – | 1 | 2025-08-13 | 5,500 |
| Smollen JohnEVP Traded Products & Relation | $115,000 | – | 1 | 2025-08-13 | 7,226 |
| Nazarali JamilDirector | $57,500 | – | 1 | 2025-08-13 | 2,500 |
| Lozier Kenneth W.Director | $23,000 | – | 1 | 2025-08-13 | 1,000 |
| Stahlin PaulDirector | $23,000 | – | 1 | 2025-08-13 | 1,000 |
Open-market purchases and sales
Newest first. “Plan” marks a trade made under a 10b5-1 plan set up in advance.
| Date | Insider | Trade | Shares | Price | Value | Holds after | Filing |
|---|---|---|---|---|---|---|---|
| 2026-10-02 | Schafer Douglas M. JrEVP and CIO | Saleplan | 40,000 | 33.34 | $1.33M | 387,414 | Form 4 |
| 2026-09-16 | Brown ShellyEVP, Chief Strategy Officer | Saleplan | 21,217 | 38.61 | $819,188 | 316,490 | Form 4 |
| 2026-09-03 | Gallagher Thomas P.Director, Chairman & CEO | Saleplanindirect | 47,000 | 42.43 | $1.99M | 1,423,275 | Form 4 |
| 2026-09-03 | Deitzel EdwardEVP, CRO, CCO MIAX Exchanges | Saleplan | 11,000 | 42.21 | $464,310 | 119,601 | Form 4 |
| 2026-09-02 | Teekell Judson GrayDirector | Saleplanindirect | 5,545 | 41.58 | $230,561 | 81,000 | Form 4 |
| 2026-09-02 | Teekell Judson GrayDirector | Saleplan | 3,000 | 40.89 | $122,670 | 69,251 | Form 4 |
| 2026-09-02 | Schafer Douglas M. JrEVP and CIO | Saleplan | 48,000 | 40.48 | $1.94M | 387,414 | Form 4 |
| 2026-09-02 | Comly Barbara J.EVP, GC & Corporate Secretary | Saleplan | 44,445 | 40.49 | $1.80M | 839,564 | Form 4 |
| 2026-08-19 | Gallagher Thomas P.Director, Chairman & CEO | Saleplanindirect | 149,700 | 41.13 | $6.16M | 1,423,275 | Form 4 |
| 2026-08-17 | Emmons LanceEVP and CFO | Saleplan | 35,000 | 42.83 | $1.50M | 86,538 | Form 4 |
| 2026-08-17 | Schwarzkopf CynthiaDirector | Saleplan | 5,000 | 42.85 | $214,250 | 88,545 | Form 4 |
| 2026-08-04 | Teekell Judson GrayDirector | Saleplan | 3,000 | 45.79 | $137,370 | 72,251 | Form 4 |
| 2026-08-04 | Schafer Douglas M. JrEVP and CIO | Saleplan | 48,000 | 45.71 | $2.19M | 387,414 | Form 4 |
| 2026-08-04 | Gallagher Thomas P.Director, Chairman & CEO | Saleplanindirect | 48,334 | 45.69 | $2.21M | 1,723,275 | Form 4 |
| 2026-08-04 | Jayabalan HarishEVP, CISO and CRO | Saleplan | 20,000 | 45.90 | $918,000 | 78,065 | Form 4 |
| 2026-08-04 | Deitzel EdwardEVP, CRO, CCO MIAX Exchanges | Saleplan | 11,000 | 45.78 | $503,580 | 119,601 | Form 4 |
| 2026-08-04 | Eckert Kurt M.Director | Saleplan | 1,063 | 45.80 | $48,685 | 149,612 | Form 4 |
| 2026-08-04 | Comly Barbara J.EVP, GC & Corporate Secretary | Saleplan | 44,445 | 45.69 | $2.03M | 882,984 | Form 4 |
| 2026-07-15 | Schwarzkopf CynthiaDirector | Saleplan | 5,000 | 42.00 | $210,000 | 88,545 | Form 4 |
| 2026-07-13 | Gallagher Thomas P.Director, Chairman & CEO | Saleplanindirect | 70,000 | 42.52 | $2.98M | 1,723,275 | Form 4 |
| 2026-07-13 | Comly Barbara J.EVP, GC & Corporate Secretary | Saleplan | 28,000 | 41.98 | $1.18M | 882,984 | Form 4 |
| 2026-07-07 | Gallagher Thomas P.Director, Chairman & CEO | Saleplanindirect | 28,228 | 42.27 | $1.19M | 1,723,275 | Form 4 |
| 2026-07-06 | Brown ShellyEVP, Chief Strategy Officer | Saleplan | 16,000 | 42.13 | $674,080 | 353,990 | Form 4 |
| 2026-07-06 | Deitzel EdwardEVP, CRO, CCO MIAX Exchanges | Saleplan | 11,000 | 42.04 | $462,440 | 119,601 | Form 4 |
| 2026-07-06 | Jayabalan HarishEVP, CISO and CRO | Saleplan | 20,000 | 42.12 | $842,400 | 78,065 | Form 4 |
| 2026-07-06 | Gallagher Thomas P.Director, Chairman & CEO | Saleplanindirect | 41,772 | 42.09 | $1.76M | 1,723,275 | Form 4 |
| 2026-07-02 | Schafer Douglas M. JrEVP and CIO | Saleplan | 48,000 | 41.22 | $1.98M | 387,414 | Form 4 |
| 2026-07-02 | Comly Barbara J.EVP, GC & Corporate Secretary | Saleplan | 28,000 | 41.22 | $1.15M | 882,984 | Form 4 |
| 2026-07-02 | Eckert Kurt M.Director | Saleplan | 5,250 | 39.35 | $206,588 | 149,612 | Form 4 |
| 2026-07-02 | Teekell Judson GrayDirector | Saleplan | 3,000 | 40.00 | $120,000 | 75,251 | Form 4 |
| 2026-06-15 | Brown ShellyEVP, Chief Strategy Officer | Saleplan | 4,714 | 44.23 | $208,500 | 316,714 | Form 4 |
| 2026-06-11 | Schwarzkopf CynthiaDirector | Saleplan | 19,500 | 41.73 | $813,735 | 81,308 | Form 4 |
| 2026-06-09 | Jayabalan HarishEVP, CISO and CRO | Saleplan | 9,783 | 40.04 | $391,711 | 73,405 | Form 4 |
| 2026-06-08 | Jayabalan HarishEVP, CISO and CRO | Saleplan | 10,217 | 40.12 | $409,906 | 73,405 | Form 4 |
| 2026-06-02 | Teekell Judson GrayDirector | Saleplan | 3,000 | 42.78 | $128,340 | 71,014 | Form 4 |
| 2026-06-02 | Schafer Douglas M. JrEVP and CIO | Saleplan | 48,000 | 42.84 | $2.06M | 396,681 | Form 4 |
| 2026-06-02 | Gallagher Thomas P.Director, Chairman & CEO | Saleplanindirect | 70,000 | 42.36 | $2.97M | 1,723,275 | Form 4 |
| 2026-06-02 | Brown ShellyEVP, Chief Strategy Officer | Saleplan | 16,000 | 42.12 | $673,920 | 325,047 | Form 4 |
| 2026-06-02 | Deitzel EdwardEVP, CRO, CCO MIAX Exchanges | Saleplan | 11,000 | 42.16 | $463,760 | 116,221 | Form 4 |
| 2026-06-02 | Eckert Kurt M.Director | Saleplan | 5,250 | 42.76 | $224,490 | 142,375 | Form 4 |
45 more
| 2026-06-02 | Comly Barbara J.EVP, GC & Corporate Secretary | Saleplan | 28,000 | 42.85 | $1.20M | 843,844 | Form 4 |
| 2026-05-15 | Emmons LanceEVP and CFO | Saleplan | 35,000 | 56.36 | $1.97M | 84,262 | Form 4 |
| 2026-05-05 | Gallagher Thomas P.Director, Chairman & CEO | Saleplanindirect | 15,771 | 47.92 | $755,746 | 1,723,275 | Form 4 |
| 2026-05-04 | Deitzel EdwardEVP, CRO, CCO MIAX Exchanges | Saleplan | 11,000 | 47.28 | $520,080 | 116,221 | Form 4 |
| 2026-05-04 | Gallagher Thomas P.Director, Chairman & CEO | Saleplanindirect | 54,229 | 47.26 | $2.56M | 1,723,275 | Form 4 |
| 2026-05-04 | Teekell Judson GrayDirector | Saleplan | 3,000 | 47.30 | $141,900 | 56,338 | Form 4 |
| 2026-05-04 | Schafer Douglas M. JrEVP and CIO | Saleplan | 48,000 | 47.25 | $2.27M | 396,681 | Form 4 |
| 2026-05-04 | Brown ShellyEVP, Chief Strategy Officer | Saleplan | 16,000 | 47.28 | $756,480 | 325,047 | Form 4 |
| 2026-05-04 | Eckert Kurt M.Director | Saleplan | 5,625 | 47.29 | $266,006 | 142,375 | Form 4 |
| 2026-05-04 | Comly Barbara J.EVP, GC & Corporate Secretary | Saleplan | 28,000 | 47.26 | $1.32M | 843,844 | Form 4 |
| 2026-04-15 | Comly Barbara J.EVP, GC & Corporate Secretary | Saleplan | 29,667 | 43.64 | $1.29M | 843,844 | Form 4 |
| 2026-04-15 | Gallagher Thomas P.Director, Chairman & CEO | Saleplanindirect | 70,001 | 43.36 | $3.04M | 1,827,399 | Form 4 |
| 2026-04-15 | Gallagher Thomas P.Director, Chairman & CEO | Saleplanindirect | 104,124 | 43.36 | $4.51M | 1,723,275 | Form 4 |
| 2026-04-15 | Gallagher Thomas P.Director, Chairman & CEO | Saleplan | 49,900 | 43.68 | $2.18M | 485,963 | Form 4 |
| 2026-04-08 | Brown ShellyEVP, Chief Strategy Officer | Saleplan | 16,434 | 42.08 | $691,543 | 325,047 | Form 4 |
| 2026-04-08 | Deitzel EdwardEVP, CRO, CCO MIAX Exchanges | Saleplan | 7,572 | 42.02 | $318,175 | 116,221 | Form 4 |
| 2026-04-07 | Brown ShellyEVP, Chief Strategy Officer | Saleplan | 900 | 42.00 | $37,800 | 325,047 | Form 4/A |
| 2026-04-07 | Deitzel EdwardEVP, CRO, CCO MIAX Exchanges | Saleplan | 762 | 42.00 | $32,004 | 116,221 | Form 4 |
| 2026-04-07 | Deitzel EdwardEVP, CRO, CCO MIAX Exchanges | Saleplan | 4,001 | 42.00 | $168,042 | 116,221 | Form 4 |
| 2026-04-06 | Brown ShellyEVP, Chief Strategy Officer | Saleplan | 2,357 | 41.33 | $97,415 | 325,047 | Form 4/A |
| 2026-04-02 | Teekell Judson GrayDirector | Saleplan | 2,700 | 40.00 | $108,000 | 59,338 | Form 4 |
| 2026-03-25 | Teekell Judson GrayDirector | Sale | 300 | 40.00 | $12,000 | 62,038 | Form 4 |
| 2026-03-23 | Brown ShellyEVP, Chief Strategy Officer | Saleplan | 25,932 | 39.33 | $1.02M | 299,197 | Form 4 |
| 2026-03-19 | Eckert Kurt M.Director | Saleplan | 37,917 | 39.00 | $1.48M | 142,375 | Form 4 |
| 2026-03-17 | Schafer Douglas M. JrEVP and CIO | Saleplan | 48,000 | 39.74 | $1.91M | 396,681 | Form 4 |
| 2026-03-05 | Horizon Kinetics Asset Management LLCInsiderwith Stahl Murray | Buyindirect | 7,200 | 43.08 | $310,176 | 4,633,842 | Form 4 |
| 2026-03-04 | Horizon Kinetics Asset Management LLCInsiderwith Stahl Murray | Buyindirect | 7,200 | 43.38 | $312,336 | 4,626,642 | Form 4/A |
| 2026-03-02 | Horizon Kinetics Asset Management LLCInsiderwith Stahl Murray | Saleindirect | 53,578 | 40.92 | $2.19M | 4,619,442 | Form 4/A |
| 2025-12-12 | Horizon Kinetics Asset Management LLCInsiderwith Stahl Murray | Buyindirect | 2,439 | 41.00 | $99,999 | 4,560,364 | Form 4 |
| 2025-10-03 | Horizon Kinetics Asset Management LLCInsiderwith Stahl Murray | Buyindirect | 2 | 41.97 | $84 | 4,557,925 | Form 4 |
| 2025-09-26 | Horizon Kinetics Asset Management LLCInsiderwith Stahl Murray | Buyindirect | 4 | 41.76 | $167 | 4,557,923 | Form 4 |
| 2025-08-28 | Horizon Kinetics Asset Management LLCInsiderwith Stahl Murray | Buyindirect | 34,470 | 36.10 | $1.24M | 4,557,919 | Form 4 |
| 2025-08-14 | Emmons LanceEVP and CFO | Buyindirect | 4 | 31.44 | $126 | 4 | Form 4 |
| 2025-08-13 | Massad Mark I.Director | Buy | 3,500 | 23.00 | $80,500 | 3,500 | Form 4 |
| 2025-08-13 | Massad Mark I.Director | Buyindirect | 2,500 | 23.00 | $57,500 | 2,500 | Form 4 |
| 2025-08-13 | Massad Mark I.Director | Buyindirect | 1,500 | 23.00 | $34,500 | 1,500 | Form 4 |
| 2025-08-13 | Massad Mark I.Director | Buyindirect | 500 | 23.00 | $11,500 | 500 | Form 4 |
| 2025-08-13 | Lozier Kenneth W.Director | Buy | 1,000 | 23.00 | $23,000 | 1,000 | Form 4 |
| 2025-08-13 | Gallagher Thomas P.Director, Chairman & CEO | Buy | 12,000 | 23.00 | $276,000 | 12,000 | Form 4 |
| 2025-08-13 | Deitzel EdwardEVP, CRO, CCO MIAX Exchanges | Buy | 100 | 23.00 | $2,300 | 32,193 | Form 4 |
| 2025-08-13 | Smollen JohnEVP Traded Products & Relation | Buy | 5,000 | 23.00 | $115,000 | 7,226 | Form 4 |
| 2025-08-13 | Nazarali JamilDirector | Buy | 2,500 | 23.00 | $57,500 | 2,500 | Form 4 |
| 2025-08-13 | Stahlin PaulDirector | Buy | 1,000 | 23.00 | $23,000 | 1,000 | Form 4 |
| 2025-08-13 | Jayabalan HarishEVP, CISO and CRO | Buy | 2,500 | 23.00 | $57,500 | 6,443 | Form 4 |
| 2025-08-13 | Moore LisaDirector | Buy | 5,500 | 23.00 | $126,500 | 5,500 | Form 4 |
Grants, exercises and other transactions
Pay, tax and paperwork rather than a choice to trade at the market price. Two years.
85 × option exercise36 × grant or award28 × conversion27 × shares withheld for tax2 × option exercise1 × other1 × gift
Show them
| Date | Insider | What | Shares | Price | Holds after | Filing |
|---|---|---|---|---|---|---|
| 2026-10-02 | Schafer Douglas M. JrEVP and CIO | Option exercise M | +40,000 | 12.00 | 427,414 | Form 4 |
| 2026-09-25 | Jayabalan HarishEVP, CISO and CRO | Option exercise M | +8,333 | 12.00 | 86,398 | Form 4 |
| 2026-09-11 | Brown ShellyEVP, Chief Strategy Officer | Shares withheld for tax F | −16,283 | 42.54 | 337,707 | Form 4 |
| 2026-09-03 | Gallagher Thomas P.Director, Chairman & CEO | Option exercise M | +47,000 | 12.00 | 1,470,275 | Form 4 |
| 2026-09-03 | Gallagher Thomas P.Director, Chairman & CEO | Option exercise M | +16,666 | 12.00 | 760,605 | Form 4 |
| 2026-09-03 | Gallagher Thomas P.Director, Chairman & CEO | Option exercise M | +8,333 | 12.00 | 768,938 | Form 4 |
| 2026-09-03 | Gallagher Thomas P.Director, Chairman & CEO | Option exercise M | +13,140 | 15.22 | 782,078 | Form 4 |
| 2026-09-03 | Gallagher Thomas P.Director, Chairman & CEO | Option exercise M | +4,464 | 22.40 | 786,542 | Form 4 |
| 2026-09-03 | Deitzel EdwardEVP, CRO, CCO MIAX Exchanges | Option exercise M | +11,000 | 12.00 | 130,601 | Form 4 |
| 2026-09-02 | Schafer Douglas M. JrEVP and CIO | Option exercise M | +43,334 | 12.00 | 430,748 | Form 4 |
| 2026-09-02 | Schafer Douglas M. JrEVP and CIO | Option exercise M | +4,666 | 12.00 | 435,414 | Form 4 |
| 2026-09-02 | Comly Barbara J.EVP, GC & Corporate Secretary | Option exercise M | +44,445 | 12.00 | 884,009 | Form 4 |
| 2026-08-18 | Gallagher Thomas P.Director, Chairman & CEO | Shares withheld for tax F | −150,300 | 42.41 | 1,572,975 | Form 4 |
| 2026-08-18 | Comly Barbara J.EVP, GC & Corporate Secretary | Shares withheld for tax F | −43,420 | 42.41 | 839,564 | Form 4 |
| 2026-08-17 | Schwarzkopf CynthiaDirector | Option exercise M | +5,000 | 12.00 | 93,545 | Form 4 |
| 2026-08-04 | Schafer Douglas M. JrEVP and CIO | Option exercise M | +48,000 | 12.00 | 435,414 | Form 4 |
| 2026-08-04 | Gallagher Thomas P.Director, Chairman & CEO | Option exercise M | +48,334 | 12.00 | 1,771,609 | Form 4 |
| 2026-08-04 | Jayabalan HarishEVP, CISO and CRO | Option exercise M | +14,168 | 12.00 | 92,233 | Form 4 |
| 2026-08-04 | Jayabalan HarishEVP, CISO and CRO | Option exercise M | +5,832 | 15.22 | 98,065 | Form 4 |
| 2026-08-04 | Deitzel EdwardEVP, CRO, CCO MIAX Exchanges | Option exercise M | +11,000 | 12.00 | 130,601 | Form 4 |
| 2026-08-04 | Eckert Kurt M.Director | Option exercise M | +1,063 | 12.00 | 150,675 | Form 4 |
| 2026-08-04 | Comly Barbara J.EVP, GC & Corporate Secretary | Option exercise M | +44,445 | 12.00 | 927,429 | Form 4 |
| 2026-07-15 | Schwarzkopf CynthiaDirector | Option exercise M | +5,000 | 12.00 | 93,545 | Form 4 |
| 2026-07-13 | Gallagher Thomas P.Director, Chairman & CEO | Option exercise M | +70,000 | 12.00 | 1,793,275 | Form 4 |
| 2026-07-13 | Comly Barbara J.EVP, GC & Corporate Secretary | Option exercise M | +28,000 | 12.00 | 910,984 | Form 4 |
| 2026-07-08 | Brown David ADirector | Shares withheld for tax F | −171 | 43.72 | 7,066 | Form 4 |
| 2026-07-07 | Gallagher Thomas P.Director, Chairman & CEO | Option exercise M | +28,228 | 12.00 | 1,751,503 | Form 4 |
| 2026-07-06 | Brown ShellyEVP, Chief Strategy Officer | Option exercise M | +16,000 | 12.00 | 369,990 | Form 4 |
| 2026-07-06 | Deitzel EdwardEVP, CRO, CCO MIAX Exchanges | Option exercise M | +7,333 | 12.00 | 126,934 | Form 4 |
| 2026-07-06 | Deitzel EdwardEVP, CRO, CCO MIAX Exchanges | Option exercise M | +3,667 | 12.00 | 130,601 | Form 4 |
| 2026-07-06 | Jayabalan HarishEVP, CISO and CRO | Option exercise M | +834 | 12.00 | 78,899 | Form 4 |
| 2026-07-06 | Jayabalan HarishEVP, CISO and CRO | Option exercise M | +16,667 | 12.00 | 95,566 | Form 4 |
| 2026-07-06 | Jayabalan HarishEVP, CISO and CRO | Option exercise M | +2,499 | 12.00 | 98,065 | Form 4 |
| 2026-07-06 | Gallagher Thomas P.Director, Chairman & CEO | Option exercise M | +41,772 | 12.00 | 1,765,047 | Form 4 |
| 2026-07-02 | Schafer Douglas M. JrEVP and CIO | Option exercise M | +6,000 | 12.00 | 393,414 | Form 4 |
| 2026-07-02 | Schafer Douglas M. JrEVP and CIO | Option exercise M | +42,000 | 12.00 | 435,414 | Form 4 |
| 2026-07-02 | Comly Barbara J.EVP, GC & Corporate Secretary | Option exercise M | +28,000 | 12.00 | 910,984 | Form 4 |
| 2026-07-02 | Eckert Kurt M.Director | Option exercise M | +5,250 | 12.00 | 154,862 | Form 4 |
| 2026-06-16 | Schafer Douglas M. JrEVP and CIO | Grant or award A | +23,298 | – | 387,414 | Form 4 |
| 2026-06-16 | Gallagher Thomas P.Director, Chairman & CEO | Grant or award A | +232,977 | – | 743,939 | Form 4 |
| 2026-06-16 | Brown ShellyEVP, Chief Strategy Officer | Grant or award A | +37,276 | – | 353,990 | Form 4 |
| 2026-06-16 | Jayabalan HarishEVP, CISO and CRO | Grant or award A | +4,660 | – | 78,065 | Form 4 |
| 2026-06-16 | Vermaas CeesCEO of TISEG | Grant or award A | +4,660 | – | 4,660 | Form 4 |
| 2026-06-16 | Deitzel EdwardEVP, CRO, CCO MIAX Exchanges | Grant or award A | +9,319 | – | 119,601 | Form 4 |
| 2026-06-16 | Emmons LanceEVP and CFO | Grant or award A | +37,276 | – | 121,538 | Form 4 |
| 2026-06-16 | Smollen JohnEVP, New Product Development | Grant or award A | +7,455 | – | 178,212 | Form 4 |
| 2026-06-16 | Comly Barbara J.EVP, GC & Corporate Secretary | Grant or award A | +39,140 | – | 882,984 | Form 4 |
| 2026-06-16 | Sites EricDirector | Grant or award A | +4,970 | – | 5,684 | Form 4 |
| 2026-06-16 | Stahlin PaulDirector | Grant or award A | +4,970 | – | 42,143 | Form 4 |
| 2026-06-16 | Brown David ADirector | Grant or award A | +4,970 | – | 7,237 | Form 4 |
| 2026-06-16 | Sommers Jill E.Director | Grant or award A | +4,970 | – | 6,083 | Form 4 |
| 2026-06-16 | Teekell Judson GrayDirector | Grant or award A | +4,970 | – | 78,251 | Form 4 |
| 2026-06-16 | Raymond Mark F.Director | Option exercise M | +16,000 | 12.00 | 62,094 | Form 4 |
| 2026-06-16 | Raymond Mark F.Director | Grant or award A | +4,970 | – | 67,064 | Form 4 |
| 2026-06-16 | Beckelman JohnDirector | Grant or award A | +4,970 | – | 15,904 | Form 4 |
| 2026-06-16 | Schwarzkopf CynthiaDirector | Grant or award A | +4,970 | – | 88,545 | Form 4 |
| 2026-06-16 | Eckert Kurt M.Director | Grant or award A | +4,970 | – | 149,612 | Form 4 |
| 2026-06-16 | Al-Bahar Talal JassimDirector | Grant or award A | +4,970 | – | 40,891 | Form 4 |
| 2026-06-16 | Massad Mark I.Director | Grant or award A | +4,970 | – | 10,737 | Form 4 |
| 2026-06-16 | Lozier Kenneth W.Director | Grant or award A | +4,970 | – | 8,237 | Form 4 |
| 2026-06-16 | Moore LisaDirector | Grant or award A | +4,970 | – | 12,737 | Form 4 |
| 2026-06-15 | Sites EricDirector | Grant or award A | +714 | – | 714 | Form 4 |
| 2026-06-15 | Stahlin PaulDirector | Grant or award A | +2,267 | – | 37,173 | Form 4 |
| 2026-06-15 | Brown David ADirector | Grant or award A | +2,267 | – | 2,267 | Form 4 |
| 2026-06-15 | Sommers Jill E.Director | Grant or award A | +1,113 | – | 1,113 | Form 4 |
| 2026-06-15 | Teekell Judson GrayDirector | Grant or award A | +2,267 | – | 73,281 | Form 4 |
| 2026-06-15 | Raymond Mark F.Director | Grant or award A | +2,267 | – | 46,094 | Form 4 |
| 2026-06-15 | Beckelman JohnDirector | Grant or award A | +2,267 | – | 10,934 | Form 4 |
| 2026-06-15 | Schwarzkopf CynthiaDirector | Grant or award A | +2,267 | – | 83,575 | Form 4 |
| 2026-06-15 | Eckert Kurt M.Director | Grant or award A | +2,267 | – | 144,642 | Form 4 |
| 2026-06-15 | Al-Bahar Talal JassimDirector | Grant or award A | +2,267 | – | 35,921 | Form 4 |
| 2026-06-15 | Massad Mark I.Director | Grant or award A | +2,267 | – | 5,767 | Form 4 |
| 2026-06-15 | Lozier Kenneth W.Director | Grant or award A | +2,267 | – | 3,267 | Form 4 |
| 2026-06-15 | Becker LeeDirector | Grant or award A | +2,267 | – | 2,267 | Form 4 |
| 2026-06-15 | Moore LisaDirector | Grant or award A | +2,267 | – | 7,767 | Form 4 |
| 2026-06-11 | Schafer Douglas M. JrEVP and CIO | Shares withheld for tax F | −32,565 | 40.79 | 364,116 | Form 4 |
| 2026-06-11 | Brown ShellyEVP, Chief Strategy Officer | Shares withheld for tax F | −3,619 | 40.79 | 321,428 | Form 4 |
| 2026-06-11 | Schwarzkopf CynthiaDirector | Option exercise M | +19,500 | 12.00 | 100,808 | Form 4 |
| 2026-06-11 | Deitzel EdwardEVP, CRO, CCO MIAX Exchanges | Shares withheld for tax F | −5,939 | 40.79 | 110,282 | Form 4 |
| 2026-06-11 | Stahlin PaulDirector | Option exercise M | +4,000 | 12.00 | 36,083 | Form 4 |
| 2026-06-11 | Stahlin PaulDirector | Shares withheld for tax F | −1,177 | 40.79 | 34,906 | Form 4 |
| 2026-06-09 | Stahlin PaulDirector | Option exercise M | +7,000 | 12.00 | 32,083 | Form 4 |
| 2026-06-09 | Jayabalan HarishEVP, CISO and CRO | Option exercise M | +9,783 | 12.00 | 83,188 | Form 4 |
| 2026-06-08 | Jayabalan HarishEVP, CISO and CRO | Option exercise M | +10,217 | 12.00 | 83,622 | Form 4 |
| 2026-06-02 | Schafer Douglas M. JrEVP and CIO | Option exercise M | +48,000 | 12.00 | 444,681 | Form 4 |
| 2026-06-02 | Gallagher Thomas P.Director, Chairman & CEO | Option exercise M | +70,000 | 12.00 | 1,793,275 | Form 4 |
| 2026-06-02 | Brown ShellyEVP, Chief Strategy Officer | Option exercise M | +16,000 | 12.00 | 341,047 | Form 4 |
| 2026-06-02 | Deitzel EdwardEVP, CRO, CCO MIAX Exchanges | Option exercise M | +11,000 | 12.00 | 127,221 | Form 4 |
| 2026-06-02 | Eckert Kurt M.Director | Option exercise M | +5,250 | 12.00 | 147,625 | Form 4 |
| 2026-06-02 | Comly Barbara J.EVP, GC & Corporate Secretary | Option exercise M | +28,000 | 12.00 | 871,844 | Form 4 |
| 2026-05-19 | Horizon Kinetics Asset Management LLC10% owner | Other J | −2,455,744 | – | 2,170,898 | Form 4 |
| 2026-05-19 | Teekell Judson GrayDirector | Option exercise M | +22,667 | 12.00 | 79,005 | Form 4 |
| 2026-05-19 | Teekell Judson GrayDirector | Shares withheld for tax F | −4,991 | 54.51 | 74,014 | Form 4 |
| 2026-05-11 | Gallagher Thomas P.Director, Chairman & CEO | Option exercise M | +24,999 | 12.00 | 510,962 | Form 4 |
| 2026-05-05 | Gallagher Thomas P.Director, Chairman & CEO | Option exercise M | +15,771 | 12.00 | 1,739,046 | Form 4 |
| 2026-05-04 | Deitzel EdwardEVP, CRO, CCO MIAX Exchanges | Option exercise M | +11,000 | 12.00 | 127,221 | Form 4 |
| 2026-05-04 | Gallagher Thomas P.Director, Chairman & CEO | Option exercise M | +54,229 | 12.00 | 1,777,504 | Form 4 |
| 2026-05-04 | Schafer Douglas M. JrEVP and CIO | Option exercise M | +48,000 | 12.00 | 444,681 | Form 4 |
| 2026-05-04 | Brown ShellyEVP, Chief Strategy Officer | Option exercise M | +16,000 | 12.00 | 341,047 | Form 4 |
| 2026-05-04 | Eckert Kurt M.Director | Option exercise M | +5,625 | 12.00 | 148,000 | Form 4 |
| 2026-05-04 | Comly Barbara J.EVP, GC & Corporate Secretary | Option exercise M | +28,000 | 12.00 | 871,844 | Form 4 |
| 2026-04-15 | Comly Barbara J.EVP, GC & Corporate Secretary | Option exercise M | +29,667 | 12.00 | 873,511 | Form 4 |
| 2026-04-15 | Gallagher Thomas P.Director, Chairman & CEO | Option exercise M | +70,001 | 12.00 | 1,897,400 | Form 4 |
| 2026-04-09 | Beckelman JohnDirector | Option exercise M | +8,667 | 12.00 | 8,667 | Form 4 |
| 2026-04-08 | Brown ShellyEVP, Chief Strategy Officer | Option exercise M | +16,434 | 12.00 | 341,481 | Form 4 |
| 2026-04-08 | Deitzel EdwardEVP, CRO, CCO MIAX Exchanges | Option exercise M | +7,572 | 12.00 | 123,793 | Form 4 |
| 2026-04-07 | Brown ShellyEVP, Chief Strategy Officer | Option exercise M | +900 | 12.00 | 325,947 | Form 4/A |
| 2026-04-07 | Deitzel EdwardEVP, CRO, CCO MIAX Exchanges | Option exercise M | +762 | 12.00 | 116,983 | Form 4 |
| 2026-04-07 | Deitzel EdwardEVP, CRO, CCO MIAX Exchanges | Option exercise M | +4,001 | 12.00 | 120,222 | Form 4 |
| 2026-03-30 | Gallagher Thomas P.Director, Chairman & CEO | Shares withheld for tax F | −20,875 | 37.50 | 1,827,399 | Form 4 |
| 2026-03-30 | Brown ShellyEVP, Chief Strategy Officer | Shares withheld for tax F | −1,809 | 37.50 | 297,388 | Form 4 |
| 2026-03-30 | Brown ShellyEVP, Chief Strategy Officer | Option exercise M | +8,333 | 12.00 | 305,721 | Form 4 |
| 2026-03-30 | Brown ShellyEVP, Chief Strategy Officer | Option exercise M | +6,570 | 15.22 | 312,291 | Form 4 |
| 2026-03-30 | Brown ShellyEVP, Chief Strategy Officer | Option exercise M | +6,195 | 16.14 | 318,486 | Form 4 |
| 2026-03-30 | Brown ShellyEVP, Chief Strategy Officer | Option exercise M | +3,878 | 25.78 | 322,364 | Form 4 |
| 2026-03-30 | Brown ShellyEVP, Chief Strategy Officer | Option exercise M | +5,040 | 19.84 | 327,404 | Form 4 |
| 2026-03-30 | Deitzel EdwardEVP, CRO, CCO MIAX Exchanges | Shares withheld for tax F | −707 | 37.50 | 116,221 | Form 4 |
| 2026-03-30 | Emmons LanceEVP and CFO | Shares withheld for tax F | −8,350 | 37.50 | 119,262 | Form 4 |
| 2026-03-30 | Smollen JohnEVP, New Product Development | Shares withheld for tax F | −362 | 37.50 | 170,757 | Form 4 |
| 2026-03-30 | Comly Barbara J.EVP, GC & Corporate Secretary | Shares withheld for tax F | −1,448 | 37.50 | 843,844 | Form 4 |
| 2026-03-19 | Eckert Kurt M.Director | Option exercise M | +12,917 | 12.00 | 180,292 | Form 4 |
| 2026-03-17 | Schafer Douglas M. JrEVP and CIO | Option exercise M | +48,000 | 12.00 | 444,681 | Form 4 |
| 2026-03-09 | Comly Barbara J.EVP, GC & Corporate Secretary | Option exercise M | +8,333 | 12.00 | 820,293 | Form 4 |
| 2026-03-09 | Comly Barbara J.EVP, GC & Corporate Secretary | Option exercise M | +8,333 | 12.00 | 828,626 | Form 4 |
| 2026-03-09 | Comly Barbara J.EVP, GC & Corporate Secretary | Option exercise M | +16,666 | 12.00 | 845,292 | Form 4 |
| 2026-03-02 | Horizon Kinetics Asset Management LLCInsider | Option exercise X | +21,290 | 15.00 | 4,581,654 | Form 4/A |
| 2026-03-02 | Horizon Kinetics Asset Management LLCInsider | Option exercise X | +91,366 | 20.50 | 4,673,020 | Form 4/A |
| 2026-02-18 | Schafer Douglas M. JrEVP and CIO | Shares withheld for tax F | −32,565 | 40.89 | 396,681 | Form 4 |
| 2026-02-18 | Brown ShellyEVP, Chief Strategy Officer | Shares withheld for tax F | −19,902 | 40.89 | 325,129 | Form 4 |
| 2026-02-18 | Deitzel EdwardEVP, CRO, CCO MIAX Exchanges | Shares withheld for tax F | −6,035 | 40.89 | 116,928 | Form 4 |
| 2026-02-10 | Schafer Douglas M. JrEVP and CIO | Shares withheld for tax F | −108,550 | 41.33 | 429,246 | Form 4 |
| 2026-02-10 | Gallagher Thomas P.Director, Chairman & CEO | Shares withheld for tax F | −50,100 | 41.33 | 535,863 | Form 4 |
| 2025-12-23 | Gallagher Thomas P.Director, Chairman & CEO | Gift G | −2,000 | – | 585,963 | Form 4 |
| 2025-12-16 | Brown ShellyEVP, Chief Strategy Officer | Option exercise M | +16,666 | 12.00 | 328,365 | Form 4 |
| 2025-12-16 | Brown ShellyEVP, Chief Strategy Officer | Option exercise M | +8,333 | 12.00 | 336,698 | Form 4 |
| 2025-12-16 | Brown ShellyEVP, Chief Strategy Officer | Option exercise M | +8,333 | 12.00 | 345,031 | Form 4 |
| 2025-12-16 | Emmons LanceEVP and CFO | Option exercise M | +22,221 | 13.50 | 116,377 | Form 4 |
| 2025-12-16 | Emmons LanceEVP and CFO | Option exercise M | +6,195 | 16.14 | 122,572 | Form 4 |
| 2025-12-16 | Emmons LanceEVP and CFO | Option exercise M | +5,040 | 19.84 | 127,612 | Form 4 |
| 2025-09-11 | Smollen JohnEVP Traded Products & Relation | Option exercise M | +125,001 | 12.00 | 193,174 | Form 4 |
| 2025-09-11 | Smollen JohnEVP Traded Products & Relation | Shares withheld for tax F | −52,054 | 37.39 | 141,120 | Form 4 |
| 2025-09-11 | Smollen JohnEVP Traded Products & Relation | Option exercise M | +24,999 | 12.00 | 166,119 | Form 4 |
| 2025-09-11 | Deitzel EdwardEVP, CRO, CCO MIAX Exchanges | Option exercise M | +16,666 | 12.00 | 122,963 | Form 4 |
| 2025-09-10 | Brown ShellyEVP, Strat. Planning & BD | Shares withheld for tax F | −16,283 | 36.81 | 311,699 | Form 4 |
| 2025-09-09 | Jayabalan HarishEVP, CISO and CRO | Option exercise M | +21,999 | 12.00 | 72,384 | Form 4 |
| 2025-09-09 | Jayabalan HarishEVP, CISO and CRO | Option exercise M | +3,001 | 12.00 | 75,385 | Form 4 |
| 2025-09-09 | Jayabalan HarishEVP, CISO and CRO | Shares withheld for tax F | −1,980 | 37.30 | 73,405 | Form 4 |
| 2025-09-09 | Deitzel EdwardEVP, CRO, CCO MIAX Exchanges | Option exercise M | +62,500 | 12.00 | 144,387 | Form 4 |
| 2025-09-09 | Deitzel EdwardEVP, CRO, CCO MIAX Exchanges | Shares withheld for tax F | −38,090 | 37.30 | 106,297 | Form 4 |
| 2025-08-26 | Gallagher Thomas P.Director, Chairman & CEO | Shares withheld for tax F | −192,220 | 33.90 | 1,848,274 | Form 4 |
| 2025-08-26 | Brown ShellyEVP, Strat. Planning & BD | Shares withheld for tax F | −11,047 | 33.90 | 327,982 | Form 4 |
| 2025-08-15 | Schwarzkopf CynthiaDirector | Conversion C | +36,250 | – | 81,308 | Form 4 |
| 2025-08-15 | Schwarzkopf CynthiaDirector | Conversion C | +45,058 | – | 81,308 | Form 4 |
| 2025-08-15 | Raymond Mark F.Director | Conversion C | +17,500 | – | 43,827 | Form 4 |
| 2025-08-15 | Raymond Mark F.Director | Conversion C | +26,327 | – | 43,827 | Form 4 |
| 2025-08-15 | Teekell Judson GrayDirector | Conversion C | +30,000 | – | 62,338 | Form 4 |
| 2025-08-15 | Teekell Judson GrayDirector | Conversion C | +31,242 | – | 62,338 | Form 4 |
| 2025-08-15 | Teekell Judson GrayDirector | Conversion C | +30,000 | – | 86,545 | Form 4 |
| 2025-08-15 | Teekell Judson GrayDirector | Conversion C | +38,131 | – | 86,545 | Form 4 |
| 2025-08-15 | Gallagher Thomas P.Director, Chairman & CEO | Conversion C | +500 | – | 2,040,494 | Form 4 |
| 2025-08-15 | Gallagher Thomas P.Director, Chairman & CEO | Conversion C | +573,963 | – | 585,963 | Form 4 |
| 2025-08-15 | Gallagher Thomas P.Director, Chairman & CEO | Conversion C | +135,395 | – | 2,040,494 | Form 4 |
| 2025-08-15 | Eckert Kurt M.Director | Conversion C | +46,875 | – | 167,375 | Form 4 |
| 2025-08-15 | Comly Barbara J.EVP, GC & Corporate Secretary | Conversion C | +100,500 | – | 811,960 | Form 4 |
| 2025-08-15 | Comly Barbara J.EVP, GC & Corporate Secretary | Conversion C | +130,617 | – | 811,960 | Form 4 |
| 2025-08-15 | Jayabalan HarishEVP, CISO and CRO | Conversion C | +500 | – | 50,385 | Form 4 |
| 2025-08-15 | Jayabalan HarishEVP, CISO and CRO | Conversion C | +43,442 | – | 50,385 | Form 4 |
| 2025-08-15 | Deitzel EdwardEVP, CRO, CCO MIAX Exchanges | Conversion C | +500 | – | 81,887 | Form 4 |
| 2025-08-15 | Deitzel EdwardEVP, CRO, CCO MIAX Exchanges | Conversion C | +49,194 | – | 81,887 | Form 4 |
| 2025-08-15 | Brown ShellyEVP, Strat. Planning & BD | Conversion C | +500 | – | 339,029 | Form 4 |
| 2025-08-15 | Brown ShellyEVP, Strat. Planning & BD | Conversion C | +200,475 | – | 339,029 | Form 4 |
| 2025-08-15 | Al-Bahar Talal JassimDirector | Conversion C | +238,462 | – | 3,617,296 | Form 4 |
| 2025-08-15 | Smollen JohnEVP Traded Products & Relation | Conversion C | +73,173 | – | 68,173 | Form 4 |
| 2025-08-15 | Smollen JohnEVP Traded Products & Relation | Conversion C | +91,666 | – | 91,666 | Form 4 |
| 2025-08-15 | Schafer Douglas M. JrEVP and CIO | Conversion C | +500 | – | 537,796 | Form 4 |
| 2025-08-15 | Schafer Douglas M. JrEVP and CIO | Conversion C | +387,296 | – | 537,796 | Form 4 |
| 2025-08-15 | Stahlin PaulDirector | Conversion C | +10,000 | – | 25,083 | Form 4 |
| 2025-08-15 | Stahlin PaulDirector | Conversion C | +14,083 | – | 25,083 | Form 4 |
| 2025-08-15 | Emmons LanceEVP and CFO | Conversion C | +57,646 | – | 94,156 | Form 4 |
| 2025-08-13 | Comly Barbara J.EVP, GC & Corporate Secretary | Shares withheld for tax F | −288,075 | 23.00 | 580,843 | Form 4 |
How to read it
- Buy, sale
- Code P and S on the form: shares bought or sold in the market, at the market price. The other codes are mostly pay (a grant, an option exercised) or tax (shares the company withheld), and say little about what the insider thinks of the price.
- Plan
- A sale or purchase under a Rule 10b5-1 plan, set up in advance and running on its own schedule. Since April 2023 the form has a box for it. Much executive selling is planned and says more about diversifying than about the company.
- Holds after
- The shares the insider still held after the trade, in the form the trade was in (directly, or indirectly through a trust or a fund).
- Value
- Shares times the price the form reports, which is often an average over several fills on the day.
Read from the SEC's own quarterly data sets of Forms 3, 4 and 5, and from each day's filings since the last one. A correcting amendment replaces the lines it restates. Every row links to its filing. None of this is advice: insiders sell for many reasons, and buy for fewer.