U.S. Options

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

Change to the Market for Underlying Security Used for Openings on MIAX Options, MIAX Pearl Options, MIAX Emerald Options, and MIAX Sapphire Options for Symbol BBBY (NXH) Effective Monday, August 17, 2026

Market for Underlying Security Used for Openings on MIAX Options, MIAX Pearl Options, MIAX Emerald Options, and MIAX Sapphire Options for Newly Listed Symbol EROC Effective Monday, August 17, 2026

Change to the Penny Interval Program for August 14, 2026