Transactions
40
Insider / MIAMI INTERNATIONAL HOLDINGS, INC.
Brown Shelly
EVP, Chief Strategy Officer at MIAMI INTERNATIONAL HOLDINGS, INC.
- Ticker
- MIAX
- First filing on record
- December 17, 2025
- Latest trade on record
- September 16, 2026
- SEC filings
- EDGAR ↗
Brown Shelly, EVP, Chief Strategy Officer at MIAMI INTERNATIONAL HOLDINGS, INC., has disclosed 40 transactions in MIAX since December 17, 2025: 0 purchases (0 open-market buys) and 13 sales, worth about $8.4M at the reported prices. The latest was filed September 17, 2026, 1 day after the trade.
Open-market buys
0
Sales
13
Avg. disclosure lag
1.5d
Trading in charts
Trade timeline
When does this person trade, how big, and in which direction? Every trade in the last 12 months.
Bought (above the line)Sold (below the line)Other transaction
In the last 12 months Brown Shelly made no purchases and 13 sales worth $6.7M, plus 27 other transactions. Dot size is the dollar amount.
Portfolio mix
Which stocks does this person trade most? Tile size is dollars traded, all time on record.
Brown Shelly has traded 1 stock on record; the largest by dollars is MIAX.
Reporting lag
Does this person report on time? One bar per filing against the Form 4 deadline.
On timeLate
0 of 14 filings on record were reported after the Form 4 deadline (two business days, counted here as 4 calendar days).
What kind of transactions
Most Form 4 rows are pay arriving or tax being withheld, not a decision to buy or sell. Only code P is an open-market purchase and code S an open-market sale. What each code means: Form 4 transaction codes.
| Code | Meaning | Rows | Shares | Value |
|---|---|---|---|---|
| M | Option exercise or conversion | 24 | 255,564 | $1.7M |
| S | Open-market sale | 9 | 119,554 | $5.0M |
| F | Shares withheld for tax | 4 | 41,613 | $1.7M |
| A | Grant or award | 3 | 75,622 | — |
| Year | Rows | Bought | Sold |
|---|---|---|---|
| 2026 | 34 | 0 | 13 · $6.7M |
| 2025 | 6 | 0 | 0 |
Transactions
| Security | Side | Trade date | Disclosed | Lag | Shares | Price | Value | Flags | Source | Share |
|---|---|---|---|---|---|---|---|---|---|---|
| MIAX | Sell S | September 16, 2026 | September 17, 2026 | 1d | 21,217 | $39 | $819K | 10b5-1 plan | Form 4 ↗ | |
| MIAX | Sell F | September 11, 2026 | September 11, 2026 | 0d | 16,283 | $43 | $693K | Form 4 ↗ | ||
| MIAX | Option / conversion M | July 6, 2026 | July 7, 2026 | 1d | 16,000 | — | — | 10b5-1 planderivative | Form 4 ↗ | |
| MIAX | Sell S | July 6, 2026 | July 7, 2026 | 1d | 16,000 | $42 | $674K | 10b5-1 plan | Form 4 ↗ | |
| MIAX | Option / conversion M | July 6, 2026 | July 7, 2026 | 1d | 16,000 | $12 | $192K | 10b5-1 plan | Form 4 ↗ | |
| MIAX | Other A | June 16, 2026 | June 18, 2026 | 2d | 35,861 | — | — | derivative | Form 4 ↗ | |
| MIAX | Other A | June 16, 2026 | June 18, 2026 | 2d | 2,485 | — | — | derivative | Form 4 ↗ | |
| MIAX | Other A | June 16, 2026 | June 18, 2026 | 2d | 37,276 | — | — | Form 4 ↗ | ||
| MIAX | Sell S | June 15, 2026 | June 17, 2026 | 2d | 4,714 | $44 | $209K | 10b5-1 plan | Form 4 ↗ | |
| MIAX | Sell F | June 11, 2026 | June 12, 2026 | 1d | 3,619 | $41 | $148K | Form 4 ↗ | ||
| MIAX | Option / conversion M | June 2, 2026 | June 4, 2026 | 2d | 16,000 | — | — | 10b5-1 planderivative | Form 4 ↗ | |
| MIAX | Sell S | June 2, 2026 | June 4, 2026 | 2d | 16,000 | $42 | $674K | 10b5-1 plan | Form 4 ↗ | |
| MIAX | Option / conversion M | June 2, 2026 | June 4, 2026 | 2d | 16,000 | $12 | $192K | 10b5-1 plan | Form 4 ↗ | |
| MIAX | Option / conversion M | May 4, 2026 | May 5, 2026 | 1d | 16,000 | — | — | 10b5-1 planderivative | Form 4 ↗ | |
| MIAX | Sell S | May 4, 2026 | May 5, 2026 | 1d | 16,000 | $47 | $756K | 10b5-1 plan | Form 4 ↗ | |
| MIAX | Option / conversion M | May 4, 2026 | May 5, 2026 | 1d | 16,000 | $12 | $192K | 10b5-1 plan | Form 4 ↗ | |
| MIAX | Option / conversion M | April 8, 2026 | April 9, 2026 | 1d | 16,434 | — | — | 10b5-1 planderivative | Form 4 ↗ | |
| MIAX | Sell S | April 8, 2026 | April 9, 2026 | 1d | 16,434 | $42 | $692K | 10b5-1 plan | Form 4 ↗ | |
| MIAX | Option / conversion M | April 8, 2026 | April 9, 2026 | 1d | 16,434 | $12 | $197K | 10b5-1 plan | Form 4 ↗ | |
| MIAX | Sell S | April 7, 2026 | April 8, 2026 | 1d | 900 | $42 | $38K | 10b5-1 plan | Form 4 ↗ | |
| MIAX | Sell S | April 6, 2026 | April 8, 2026 | 2d | 2,357 | $41 | $97K | 10b5-1 plan | Form 4 ↗ | |
| MIAX | Option / conversion M | March 30, 2026 | April 1, 2026 | 2d | 5,040 | — | — | derivative | Form 4 ↗ | |
| MIAX | Option / conversion M | March 30, 2026 | April 1, 2026 | 2d | 3,878 | — | — | derivative | Form 4 ↗ | |
| MIAX | Option / conversion M | March 30, 2026 | April 1, 2026 | 2d | 6,195 | — | — | derivative | Form 4 ↗ | |
| MIAX | Option / conversion M | March 30, 2026 | April 1, 2026 | 2d | 6,570 | — | — | derivative | Form 4 ↗ | |
| MIAX | Option / conversion M | March 30, 2026 | April 1, 2026 | 2d | 8,333 | — | — | derivative | Form 4 ↗ | |
| MIAX | Option / conversion M | March 30, 2026 | April 1, 2026 | 2d | 5,040 | $20 | $100K | Form 4 ↗ | ||
| MIAX | Option / conversion M | March 30, 2026 | April 1, 2026 | 2d | 3,878 | $26 | $100K | Form 4 ↗ | ||
| MIAX | Option / conversion M | March 30, 2026 | April 1, 2026 | 2d | 6,195 | $16 | $100K | Form 4 ↗ | ||
| MIAX | Option / conversion M | March 30, 2026 | April 1, 2026 | 2d | 6,570 | $15 | $100K | Form 4 ↗ | ||
| MIAX | Option / conversion M | March 30, 2026 | April 1, 2026 | 2d | 8,333 | $12 | $100K | Form 4 ↗ | ||
| MIAX | Sell F | March 30, 2026 | April 1, 2026 | 2d | 1,809 | $38 | $68K | Form 4 ↗ | ||
| MIAX | Sell S | March 23, 2026 | March 24, 2026 | 1d | 25,932 | $39 | $1.0M | 10b5-1 plan | Form 4 ↗ | |
| MIAX | Sell F | February 18, 2026 | February 20, 2026 | 2d | 19,902 | $41 | $814K | Form 4 ↗ | ||
| MIAX | Option / conversion M | December 16, 2025 | December 17, 2025 | 1d | 8,333 | — | — | derivative | Form 4 ↗ | |
| MIAX | Option / conversion M | December 16, 2025 | December 17, 2025 | 1d | 8,333 | — | — | derivative | Form 4 ↗ | |
| MIAX | Option / conversion M | December 16, 2025 | December 17, 2025 | 1d | 16,666 | — | — | derivative | Form 4 ↗ | |
| MIAX | Option / conversion M | December 16, 2025 | December 17, 2025 | 1d | 8,333 | $12 | $100K | Form 4 ↗ | ||
| MIAX | Option / conversion M | December 16, 2025 | December 17, 2025 | 1d | 8,333 | $12 | $100K | Form 4 ↗ | ||
| MIAX | Option / conversion M | December 16, 2025 | December 17, 2025 | 1d | 16,666 | $12 | $200K | Form 4 ↗ |
Filings
| Filed | Form | Accession | Rows | Status | Source |
|---|---|---|---|---|---|
| September 17, 2026 | Form 4 | 0002080506-26-000027 | 1 | published | EDGAR ↗ |
| September 11, 2026 | Form 4 | 0002080506-26-000025 | 1 | published | EDGAR ↗ |
| July 7, 2026 | Form 4 | 0001628280-26-047491 | 3 | published | EDGAR ↗ |
| June 18, 2026 | Form 4 | 0002080506-26-000023 | 3 | published | EDGAR ↗ |
| June 17, 2026 | Form 4 | 0002080506-26-000021 | 1 | published | EDGAR ↗ |
| June 12, 2026 | Form 4 | 0002080506-26-000019 | 1 | published | EDGAR ↗ |
| June 4, 2026 | Form 4 | 0002080506-26-000017 | 3 | published | EDGAR ↗ |
| May 5, 2026 | Form 4 | 0002080506-26-000015 | 3 | published | EDGAR ↗ |
| April 9, 2026 | Form 4 | 0002080506-26-000013 | 3 | published | EDGAR ↗ |
| April 8, 2026 | Form 4 | 0002080506-26-000009 | 2 | published | EDGAR ↗ |
| April 1, 2026 | Form 4 | 0002080506-26-000005 | 11 | published | EDGAR ↗ |
| March 24, 2026 | Form 4 | 0001628280-26-020862 | 1 | published | EDGAR ↗ |
| February 20, 2026 | Form 4 | 0002080506-26-000002 | 1 | published | EDGAR ↗ |
| December 17, 2025 | Form 4 | 0002080506-25-000007 | 6 | published | EDGAR ↗ |
Other insiders at MIAMI INTERNATIONAL HOLDINGS, INC.
- Gallagher Thomas P. Chairman & CEO 47 rows
- Comly Barbara J. EVP, GC & Corporate Secretary 35 rows
- Schafer Douglas M. JR EVP and CIO 34 rows
- Deitzel Edward EVP, CRO, CCO MIAX Exchanges 32 rows
- Jayabalan Harish EVP, CISO and CRO 23 rows
- Eckert Kurt M. Director 18 rows
- STAHL MURRAY Director 13 rows
- Teekell Judson Gray Director 13 rows
- Emmons Lance EVP and CFO 12 rows
- Schwarzkopf Cynthia Director 12 rows
Everyone on file, with contracts and lobbying under the company's name: MIAMI INTERNATIONAL HOLDINGS, INC..
Guides for this page
- What is SEC Form 4? Who files: officers, directors and owners of more than 10% of a class of the company's shares.
- Form 4 transaction codes P = purchase. S = sale. These are the two market trades.
- Insider buying vs insider selling Selling outweighs buying by a wide margin in normal times.
- Rule 10b5-1 trading plans The plan must be set up when the insider has no important non-public information.
- Options and derivatives on Form 4 Table I = shares. Table II = options and other derivatives.
Sources and method
| Source | Filings | Rows | First filed | Newest filed | Read the originals |
|---|---|---|---|---|---|
| SEC EDGAR, Form 4 | 14 | 40 | December 17, 2025 | September 17, 2026 | Form 4 list on EDGAR |
Site built October 27, 2026. Every row in the tables above links to its own filing. To quote a figure, use the Cite button at the top of the page; see how to cite and reuse.
Every row comes from the reporting owner's Form 4 as filed with the SEC (EDGAR ownership XML), read daily. "Value" is shares × the reported price; code P is an open-market purchase, S a sale, M an option exercise, A a grant. The lag is the filing date minus the trade date; Form 4 is due within two business days. Amendments (4/A) are not merged. Details on the methodology page; report an error on corrections.
Not investment advice. Figures are public disclosures shown as filed; they may lag the trade and may be amended later. No recommendation is made or implied.