MIAX
MIAMI INTERNATIONAL HOLDINGS, INC.
NYSE · USFinancial ServicesFinancial - Capital Markets
$42.68+0.83%
Price as of Jul 20, 2026
MIAX ownership
MIAMI INTERNATIONAL HOLDINGS, INC. ownership & insider activity
Latest available institutional positioning and SEC Form 4 insider transactions, coalesced at the company entity level when listings share coverage.
Insider Activity
Sentiment
0/100
Buys (3m)
0
Sells (3m)
32
Net (3m)
-$32.9M
Insider trades by month Buys Sells
Mar
Apr
May
Jun
Jul
Context3-month price -5.8%Institutions accumulating (13F)
| Date | Insider | Type | Shares | Price |
|---|---|---|---|---|
| Jul 16, 2026 | Schwarzkopf Cynthiadirector | Option | 5,000 | $12.00 |
| Jul 16, 2026 | Schwarzkopf Cynthiadirector | Sell | 5,000 | $42.00 |
| Jul 14, 2026 | Comly Barbara J.officer: EVP, GC & Corporate Secretary | Sell | 28,000 | $41.98 |
| Jul 14, 2026 | Gallagher Thomas P.director, officer: Chairman & CEO | Sell | 70,000 | $42.52 |
| Jul 14, 2026 | Gallagher Thomas P.director, officer: Chairman & CEO | Option | 70,000 | $12.00 |
| Jul 14, 2026 | Comly Barbara J.officer: EVP, GC & Corporate Secretary | Option | 28,000 | $12.00 |
| Jul 9, 2026 | BROWN DAVID Adirector | Tax | 171 | $43.72 |
| Jul 7, 2026 | Eckert Kurt M.director | Option | 5,250 | $12.00 |
| Jul 7, 2026 | Teekell Judson Graydirector | Sell | 3,000 | $40.00 |
| Jul 7, 2026 | Brown Shellyofficer: EVP, Chief Strategy Officer | Sell | 16,000 | $42.13 |
| Jul 7, 2026 | Brown Shellyofficer: EVP, Chief Strategy Officer | Option | 16,000 | $12.00 |
| Jul 7, 2026 | Deitzel Edwardofficer: EVP, CRO, CCO MIAX Exchanges | Sell | 11,000 | $42.04 |
| Jul 7, 2026 | Deitzel Edwardofficer: EVP, CRO, CCO MIAX Exchanges | Option | 3,667 | $12.00 |
| Jul 7, 2026 | Deitzel Edwardofficer: EVP, CRO, CCO MIAX Exchanges | Option | 7,333 | $12.00 |
| Jul 7, 2026 | Jayabalan Harishofficer: EVP, CISO and CRO | Sell | 20,000 | $42.12 |
| Jul 7, 2026 | Jayabalan Harishofficer: EVP, CISO and CRO | Option | 2,499 | $12.00 |
| Jul 7, 2026 | Jayabalan Harishofficer: EVP, CISO and CRO | Option | 16,667 | $12.00 |
| Jul 7, 2026 | Jayabalan Harishofficer: EVP, CISO and CRO | Option | 834 | $12.00 |
| Jul 7, 2026 | Gallagher Thomas P.director, officer: Chairman & CEO | Sell | 28,228 | $42.27 |
| Jul 7, 2026 | Gallagher Thomas P.director, officer: Chairman & CEO | Option | 28,228 | $12.00 |
| Jul 7, 2026 | Gallagher Thomas P.director, officer: Chairman & CEO | Sell | 41,772 | $42.09 |
| Jul 7, 2026 | Gallagher Thomas P.director, officer: Chairman & CEO | Option | 41,772 | $12.00 |
| Jul 7, 2026 | Schafer Douglas M. JRofficer: EVP and CIO | Sell | 48,000 | $41.22 |
| Jul 7, 2026 | Schafer Douglas M. JRofficer: EVP and CIO | Option | 42,000 | $12.00 |
| Jul 7, 2026 | Schafer Douglas M. JRofficer: EVP and CIO | Option | 6,000 | $12.00 |
| Jul 7, 2026 | Comly Barbara J.officer: EVP, GC & Corporate Secretary | Sell | 28,000 | $41.22 |
| Jul 7, 2026 | Comly Barbara J.officer: EVP, GC & Corporate Secretary | Option | 28,000 | $12.00 |
| Jul 7, 2026 | Eckert Kurt M.director | Sell | 5,250 | $39.35 |
| Jun 18, 2026 | Gallagher Thomas P.director, officer: Chairman & CEO | Grant | 2,485 | $40.24 |
| Jun 18, 2026 | Vermaas Ceesofficer: CEO of TISEG | Grant | 4,660 | — |
Source: MIAX SEC Form 4 filings, latest Jul 16, 2026. For informational purposes only — not investment advice.
Institutional activity (13F)
How institutions changed their MIAX positions over the last 6 months (SEC Form 13F).
Increased
144
New positions
152
Reduced
50
Sold out
58
Largest moves
| Institution | Action | Shares | Filed |
|---|---|---|---|
| T. ROWE PRICE INVESTMENT MANAGEMENT, INC. | Increased | 4.1M | May 15, 2026 |
| SUSQUEHANNA INTERNATIONAL GROUP, LLP | Increased | 3.6M | May 15, 2026 |
| HORIZON KINETICS ASSET MANAGEMENT LLC | Increased | 3.5M | May 15, 2026 |
| SUSQUEHANNA INTERNATIONAL GROUP, LLP | Increased | 3.3M | Feb 17, 2026 |
| T. ROWE PRICE INVESTMENT MANAGEMENT, INC. | Increased | 3.0M | Feb 19, 2026 |
| BLACKROCK, INC. | Increased | 2.2M | May 13, 2026 |
| VANGUARD GROUP INC | Increased | 1.9M | Jan 29, 2026 |
| HORIZON KINETICS ASSET MANAGEMENT LLC | Increased | 1.8M | Feb 11, 2026 |
| BLACKROCK, INC. | Increased | 1.8M | Feb 12, 2026 |
| CITADEL ADVISORS LLC | Increased | 1.7M | May 15, 2026 |
| INVESCO LTD. | Increased | 1.6M | May 12, 2026 |
| AMERICAN CENTURY COMPANIES INC | Increased | 1.4M | Feb 13, 2026 |
| ALYESKA INVESTMENT GROUP, L.P. | Increased | 1.4M | May 15, 2026 |
| VANGUARD CAPITAL MANAGEMENT LLC | New Position | 1.4M | May 15, 2026 |
| VANGUARD PORTFOLIO MANAGEMENT LLC | New Position | 1.4M | May 8, 2026 |
Source: SEC Form 13F filings. For informational purposes only — not investment advice.