Schafer Douglas M. JR
SEC insider (Form 3/4/5 filer). CIK 0002079445. EVP and CIO at MIAMI INTERNATIONAL HOLDINGS, INC. (MIAX). 37 reported Form 4/5 transactions since Sep 2024; latest on Oct 2, 2026. Located in PRINCETON, NJ.
Companies Schafer Douglas M. JR has filed insider reports for
- MIAMI INTERNATIONAL HOLDINGS, INC. (MIAX): Officer, EVP and CIO
Schafer Douglas M. JR
CIK: 0002079445
Transaction Breakdown
High conviction signal
Position reduction
Derivative conversions
Compensation grants
Gifts, tax withholding, conversions, dispositions to the issuer and other codes
Companies & Roles (1)
MIAMI INTERNATIONAL HOLDINGS, INC.
Discretionary Trading P&L
Holdings
Transaction History (37 total)
- Oct 2, 2026MIAX
MIAMI INTERNATIONAL HOLDINGS, INC.
ExerciseDirect40K shares at avg. $12.00$480K - Oct 2, 2026MIAX
MIAMI INTERNATIONAL HOLDINGS, INC.
SaleDirect40K shares at avg. $33.34$1.3M - Sep 2, 2026MIAX
MIAMI INTERNATIONAL HOLDINGS, INC.
ExerciseDirect43.3K shares at avg. $12.00$520K - Sep 2, 2026MIAX
MIAMI INTERNATIONAL HOLDINGS, INC.
SaleDirect48K shares at avg. $40.48$1.9M - Sep 2, 2026MIAX
MIAMI INTERNATIONAL HOLDINGS, INC.
ExerciseDirect4.7K shares at avg. $12.00$56K - Aug 4, 2026MIAX
MIAMI INTERNATIONAL HOLDINGS, INC.
SaleDirect48K shares at avg. $45.71$2.2M - Aug 4, 2026MIAX
MIAMI INTERNATIONAL HOLDINGS, INC.
ExerciseDirect48K shares at avg. $12.00$576K - Jul 2, 2026MIAX
MIAMI INTERNATIONAL HOLDINGS, INC.
ExerciseDirect6K shares at avg. $12.00$72K - Jul 2, 2026MIAX
MIAMI INTERNATIONAL HOLDINGS, INC.
ExerciseDirect42K shares at avg. $12.00$504K - Jul 2, 2026MIAX
MIAMI INTERNATIONAL HOLDINGS, INC.
SaleDirect48K shares at avg. $41.22$2.0M
| Type | Shares | Price | Ownership | |||
|---|---|---|---|---|---|---|
| Oct 2, 2026 | MIAX MIAMI INTERNATIONAL HOLDINGS, INC. | Exercise | 40,000 | $12.00 | $480,000 | Direct |
| Oct 2, 2026 | MIAX MIAMI INTERNATIONAL HOLDINGS, INC. | Sale | 40,000 | $33.34 | $1,333,600 | Direct |
| Sep 2, 2026 | MIAX MIAMI INTERNATIONAL HOLDINGS, INC. | Exercise | 43,334 | $12.00 | $520,008 | Direct |
| Sep 2, 2026 | MIAX MIAMI INTERNATIONAL HOLDINGS, INC. | Sale | 48,000 | $40.48 | $1,943,040 | Direct |
| Sep 2, 2026 | MIAX MIAMI INTERNATIONAL HOLDINGS, INC. | Exercise | 4,666 | $12.00 | $55,992 | Direct |
| Aug 4, 2026 | MIAX MIAMI INTERNATIONAL HOLDINGS, INC. | Sale | 48,000 | $45.71 | $2,194,080 | Direct |
| Aug 4, 2026 | MIAX MIAMI INTERNATIONAL HOLDINGS, INC. | Exercise | 48,000 | $12.00 | $576,000 | Direct |
| Jul 2, 2026 | MIAX MIAMI INTERNATIONAL HOLDINGS, INC. | Exercise | 6,000 | $12.00 | $72,000 | Direct |
| Jul 2, 2026 | MIAX MIAMI INTERNATIONAL HOLDINGS, INC. | Exercise | 42,000 | $12.00 | $504,000 | Direct |
| Jul 2, 2026 | MIAX MIAMI INTERNATIONAL HOLDINGS, INC. | Sale | 48,000 | $41.22 | $1,978,560 | Direct |
1-10 of 37 transactions