Insider · CIK 0002079445
Douglas M. Schafer JR
officer
Files at MIAX (MIAMI INTERNATIONAL HOLDINGS, INC.). First filing Sep 4, 2026, latest Oct 6, 2026.
Track record
Not enough history
Fewer than three past buys with six months of prices.
Median 6-month excess
-
after past buys, n = 0
Hit rate
-
past buys that beat the index over 6 months
Open-market trades
0 / 2
$0 bought, $3.3M sold
Where the trades landed
Last year at the company this insider has traded most, with each buy and sell on the bar it happened.
MIAX: MIAMI INTERNATIONAL HOLDINGS, INC.
MIAXOct 9, 2026 · close 30.71
Daily candles, adjusted for splits and dividends. Green arrows are insider buys, red are sells, sized by value. Click a marked bar to open the signal.Charts by TradingView Lightweight Charts™
Signals
This insider’s open-market buys and sells, scored.
| Score | Company | Value | Holdings | Price context | Filed |
|---|---|---|---|---|---|
| 5Weak | MIAMI INTERNATIONAL HOLDINGS, INC. | $1.3M 40,000 shares | -9% | 0% from low-42% from high | |
| 25Weak | MIAMI INTERNATIONAL HOLDINGS, INC. | $1.9M 48,000 shares | -11% | - |
Transactions
Every row this insider has filed, newest first.
| Date | Company | Transaction | Shares | Price | Value | Holdings after | Filed |
|---|---|---|---|---|---|---|---|
| Oct 2, 2026 | MIAX MIAMI INTERNATIONAL HOLDINGS, INC. | MOption exercise Common Stock10b5-1 | +40,000 | $12.00 | $480k | 427,414 | 6 d ago |
| Oct 2, 2026 | MIAX MIAMI INTERNATIONAL HOLDINGS, INC. | SOpen-market sale Common Stock10b5-1 | -40,000 | $33.34 | $1.3M | 387,414 | 6 d ago |
| Oct 2, 2026 | MIAX MIAMI INTERNATIONAL HOLDINGS, INC. | MOption exercise Nonqualified Stock Option (Right to Buy)derivative10b5-1 | -40,000 | $0.00 | $0 | 155,334 | 6 d ago |
| Sep 2, 2026 | MIAX MIAMI INTERNATIONAL HOLDINGS, INC. | MOption exercise Common Stock10b5-1 | +43,334 | $12.00 | $520k | 430,748 | 38 d ago |
| Sep 2, 2026 | MIAX MIAMI INTERNATIONAL HOLDINGS, INC. | MOption exercise Common Stock10b5-1 | +4,666 | $12.00 | $56k | 435,414 | 38 d ago |
| Sep 2, 2026 | MIAX MIAMI INTERNATIONAL HOLDINGS, INC. | SOpen-market sale Common Stock10b5-1 | -48,000 | $40.48 | $1.9M | 387,414 | 38 d ago |
| Sep 2, 2026 | MIAX MIAMI INTERNATIONAL HOLDINGS, INC. | MOption exercise Nonqualified Stock Option (Right to Buy)derivative10b5-1 | -43,334 | $0.00 | $0 | 0 | 38 d ago |
| Sep 2, 2026 | MIAX MIAMI INTERNATIONAL HOLDINGS, INC. | MOption exercise Nonqualified Stock Option (Right to Buy)derivative10b5-1 | -4,666 | $0.00 | $0 | 195,334 | 38 d ago |
| Aug 15, 2025 | MIAX MIAMI INTERNATIONAL HOLDINGS, INC. | CConversion Common Stock | +500 | - | - | 537,796 | Aug 19, 2025 |
| Aug 15, 2025 | MIAX MIAMI INTERNATIONAL HOLDINGS, INC. | CConversion Common Stock | +387,296 | - | - | 537,796 | Aug 19, 2025 |
| Aug 15, 2025 | MIAX MIAMI INTERNATIONAL HOLDINGS, INC. | CConversion Series B Preferred Stockderivative | -500 | $0.00 | $0 | 0 | Aug 19, 2025 |
| Aug 15, 2025 | MIAX MIAMI INTERNATIONAL HOLDINGS, INC. | CConversion Nonvoting Common Stockderivative | -387,296 | $0.00 | $0 | 0 | Aug 19, 2025 |
| Aug 15, 2025 | MIAX MIAMI INTERNATIONAL HOLDINGS, INC. | MOption exercise Incentive Stock Option (Right to Buy)derivative | -16,666 | $0.00 | $0 | 0 | Aug 19, 2025 |
| Aug 15, 2025 | MIAX MIAMI INTERNATIONAL HOLDINGS, INC. | MOption exercise Incentive Stock Option (Right to Buy)derivative | +16,666 | $0.00 | $0 | 16,666 | Aug 19, 2025 |
| Aug 15, 2025 | MIAX MIAMI INTERNATIONAL HOLDINGS, INC. | MOption exercise Incentive Stock Option (Right to Buy)derivative | -19,710 | $0.00 | $0 | 0 | Aug 19, 2025 |
| Aug 15, 2025 | MIAX MIAMI INTERNATIONAL HOLDINGS, INC. | MOption exercise Incentive Stock Option (Right to Buy)derivative | +19,710 | $0.00 | $0 | 19,710 | Aug 19, 2025 |
| Aug 15, 2025 | MIAX MIAMI INTERNATIONAL HOLDINGS, INC. | MOption exercise Nonqualified Stock Option (Right to Buy)derivative | -150,000 | $0.00 | $0 | 0 | Aug 19, 2025 |
| Aug 15, 2025 | MIAX MIAMI INTERNATIONAL HOLDINGS, INC. | MOption exercise Nonqualified Stock Option (Right to Buy)derivative | +150,000 | $0.00 | $0 | 150,000 | Aug 19, 2025 |
| Aug 15, 2025 | MIAX MIAMI INTERNATIONAL HOLDINGS, INC. | MOption exercise Nonqualified Stock Option (Right to Buy)derivative | -133,334 | $0.00 | $0 | 0 | Aug 19, 2025 |
| Aug 15, 2025 | MIAX MIAMI INTERNATIONAL HOLDINGS, INC. | MOption exercise Nonqualified Stock Option (Right to Buy)derivative | +133,334 | $0.00 | $0 | 133,334 | Aug 19, 2025 |
| Aug 15, 2025 | MIAX MIAMI INTERNATIONAL HOLDINGS, INC. | MOption exercise Nonqualified Stock Option (Right to Buy)derivative | -200,000 | $0.00 | $0 | 0 | Aug 19, 2025 |
| Aug 15, 2025 | MIAX MIAMI INTERNATIONAL HOLDINGS, INC. | MOption exercise Nonqualified Stock Option (Right to Buy)derivative | +200,000 | $0.00 | $0 | 200,000 | Aug 19, 2025 |
| Aug 15, 2025 | MIAX MIAMI INTERNATIONAL HOLDINGS, INC. | MOption exercise Nonqualified Stock Option (Right to Buy)derivative | -130,290 | $0.00 | $0 | 0 | Aug 19, 2025 |
| Aug 15, 2025 | MIAX MIAMI INTERNATIONAL HOLDINGS, INC. | MOption exercise Nonqualified Stock Option (Right to Buy)derivative | +130,290 | $0.00 | $0 | 130,290 | Aug 19, 2025 |
| Aug 15, 2025 | MIAX MIAMI INTERNATIONAL HOLDINGS, INC. | MOption exercise Nonqualified Stock Option (Right to Buy)derivative | -150,000 | $0.00 | $0 | 0 | Aug 19, 2025 |
| Aug 15, 2025 | MIAX MIAMI INTERNATIONAL HOLDINGS, INC. | MOption exercise Nonqualified Stock Option (Right to Buy)derivative | +150,000 | $0.00 | $0 | 150,000 | Aug 19, 2025 |
| Aug 13, 2025 | MIAX MIAMI INTERNATIONAL HOLDINGS, INC. | FTax withholding Nonvoting Common Stockderivative | -21,710 | $23.00 | $499k | 387,296 | Aug 15, 2025 |
Not investment advice. Scores and forward returns are decision support built from public SEC filings and past prices; they describe what happened after comparable filings, not what will happen after this one. Do your own research and size your risk.