Transactions
12
Insider / MIAMI INTERNATIONAL HOLDINGS, INC.
Schwarzkopf Cynthia
Director at MIAMI INTERNATIONAL HOLDINGS, INC.
- Ticker
- MIAX
- First filing on record
- June 12, 2026
- Latest trade on record
- August 17, 2026
- SEC filings
- EDGAR ↗
Schwarzkopf Cynthia, Director at MIAMI INTERNATIONAL HOLDINGS, INC., has disclosed 12 transactions in MIAX since June 12, 2026: 0 purchases (0 open-market buys) and 3 sales, worth about $1.6M at the reported prices. The latest was filed August 19, 2026, 2 days after the trade.
Open-market buys
0
Sales
3
Avg. disclosure lag
1.3d
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 Schwarzkopf Cynthia made no purchases and 3 sales worth $1.2M, plus 9 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.
Schwarzkopf Cynthia 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 4 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 | 6 | 59,000 | $354K |
| A | Grant or award | 3 | 12,379 | — |
| S | Open-market sale | 3 | 29,500 | $1.2M |
| Year | Rows | Bought | Sold |
|---|---|---|---|
| 2026 | 12 | 0 | 3 · $1.2M |
Transactions
| Security | Side | Trade date | Disclosed | Lag | Shares | Price | Value | Flags | Source | Share |
|---|---|---|---|---|---|---|---|---|---|---|
| MIAX | Option / conversion M | August 17, 2026 | August 19, 2026 | 2d | 5,000 | — | — | 10b5-1 planderivative | Form 4 ↗ | |
| MIAX | Sell S | August 17, 2026 | August 19, 2026 | 2d | 5,000 | $43 | $214K | 10b5-1 plan | Form 4 ↗ | |
| MIAX | Option / conversion M | August 17, 2026 | August 19, 2026 | 2d | 5,000 | $12 | $60K | 10b5-1 plan | Form 4 ↗ | |
| MIAX | Option / conversion M | July 15, 2026 | July 16, 2026 | 1d | 5,000 | — | — | 10b5-1 planderivative | Form 4 ↗ | |
| MIAX | Sell S | July 15, 2026 | July 16, 2026 | 1d | 5,000 | $42 | $210K | 10b5-1 plan | Form 4 ↗ | |
| MIAX | Option / conversion M | July 15, 2026 | July 16, 2026 | 1d | 5,000 | $12 | $60K | 10b5-1 plan | Form 4 ↗ | |
| MIAX | Other A | June 16, 2026 | June 17, 2026 | 1d | 5,142 | — | — | derivative | Form 4 ↗ | |
| MIAX | Other A | June 16, 2026 | June 17, 2026 | 1d | 4,970 | — | — | Form 4 ↗ | ||
| MIAX | Other A | June 15, 2026 | June 17, 2026 | 2d | 2,267 | — | — | Form 4 ↗ | ||
| MIAX | Option / conversion M | June 11, 2026 | June 12, 2026 | 1d | 19,500 | — | — | 10b5-1 planderivative | Form 4 ↗ | |
| MIAX | Sell S | June 11, 2026 | June 12, 2026 | 1d | 19,500 | $42 | $814K | 10b5-1 plan | Form 4 ↗ | |
| MIAX | Option / conversion M | June 11, 2026 | June 12, 2026 | 1d | 19,500 | $12 | $234K | 10b5-1 plan | Form 4 ↗ |
Filings
| Filed | Form | Accession | Rows | Status | Source |
|---|---|---|---|---|---|
| August 19, 2026 | Form 4 | 0001628280-26-057950 | 3 | published | EDGAR ↗ |
| July 16, 2026 | Form 4 | 0002080596-26-000006 | 3 | published | EDGAR ↗ |
| June 17, 2026 | Form 4 | 0002080596-26-000004 | 3 | published | EDGAR ↗ |
| June 12, 2026 | Form 4 | 0002080596-26-000002 | 3 | published | EDGAR ↗ |
Other insiders at MIAMI INTERNATIONAL HOLDINGS, INC.
- Gallagher Thomas P. Chairman & CEO 47 rows
- Brown Shelly EVP, Chief Strategy Officer 40 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
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 | 4 | 12 | June 12, 2026 | August 19, 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.