Schwarzkopf Cynthia sold $814K of MIAX
Schwarzkopf Cynthia sold 19,500 shares of MIAMI INTERNATIONAL HOLDINGS, INC. (MIAX) at $41.73 ($0.81M total) on 2026-06-11 under a Rule 10b5-1 trading plan.
How this was made
The 30-second read
Why it matters
The newest fact is the specific sale size, price ($41.73/share), and that it was executed under a pre-arranged 10b5-1 plan.
Market read
Insider selling flow is disclosed, but 10b5-1 pre-arrangement typically limits interpretive impact.
What to watch
The filing does not indicate whether other insiders/large holders are buying or whether there are concurrent corporate events; without that, the signal is weak.
Background
The article is a primary-source SEC Form 4 insider transaction disclosure for MIAX.
Ticker impact
Director Cynthia Schwarzkopf filed an open-market sale of 19,500 MIAX shares for ~$813,735 under a pre-arranged 10b5-1 plan.
Low likelihood of sustained price impact; any reaction is likely muted and short-lived.
The disclosure is a Form 4 insider transaction with a stated pre-arranged 10b5-1 plan, which typically reduces interpretive value versus discretionary selling.
Market effects
No clear sector read-through; this is company-specific insider transaction data.
None indicated.
None indicated.
Counterpoint
Because the sale is under a pre-arranged 10b5-1 plan, it may reflect liquidity planning rather than negative expectations.
Key entities
- issuerMIAMI INTERNATIONAL HOLDINGS, INC.
Company whose shares were sold by a director via an open-market transaction under a 10b5-1 plan.
- insiderSchwarzkopf Cynthia
Director who sold 19,500 shares on 2026-06-11.
