U.S. Options

As previously announced in the October 9, 2026 Alert, the MIAX Sapphire Options Exchange will expand the number of customer facing 10G ULL extranet edge switches from six to ten on Friday, December 4, 2026 post close of trading.

If firms would like to order new Cross Connects (CC) to coincide with the activation of the four additional extranet edge switches, Letters of Authorization (LOAs) are required and must be requested by November 13, 2026.

Following the upgrade, firms must conduct mandatory testing for all new CCs. Also, testing is recommended for existing CC customers.
 
Testing Details:

1. Testing will be held on Saturday, December 5, 2026 from 9:00 a.m. to 12:00 p.m. ET.
2. Firms are required to perform the following verifications:
   1. Verify all 10G ULL CCs by logging into each subscribed application for each CC (i.e. establish application-level socket connections to MEO, MEI, FOI, CTD, etc., for all ports, across all CCs) and verify the login.
   2. Confirm heartbeat receipt for both the A & B market data feeds for all subscribed multicast feeds across each CC.
   3. After verifying connectivity, firms must inform MIAX Trading Operations at TradingOperations@miaxglobal.com.

Please contact MIAX Trading Operations at TradingOperations@miaxglobal.com or (609) 897-7302 to arrange testing or to receive additional information on the planned network refresh.