U.S. Options

Market for Underlying Security Used for Openings on MIAX Options and MIAX Emerald Options for Newly Listed Symbols Effective Tuesday, August 25, 2026

Change to the Penny Interval Program for August 24, 2026

Market for Underlying Security Used for Openings on MIAX Options, MIAX Pearl Options, and MIAX Sapphire Options for Newly Listed Adjusted Symbol MSTU2 Effective Monday, August 24, 2026

Update to New Selective Liquidity Auto Purge (SLAP) Functionality Implementation Date

Update to Aggregate Risk Manager Change to Adopt Origin Multiplier Implementation Date

Market for Underlying Security Used for Openings on MIAX Options, MIAX Pearl Options, MIAX Emerald Options, and MIAX Sapphire Options for Newly Listed Symbols Effective Friday, August 21, 2026

Amendment to Request for Response Messages to Remove Initiating Price for PRIME and cPRIME Auctions

Administrative Information Subscriber Feed Update to Include Origin in Liquidity Seeking Event Notification Messages