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605 Reports

February 2023

Rule 605 Disclosure of Order Execution Information

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Alerts and Notices Trader Alerts

Trader Alert 23-12: MWCB Testing Opportunity – April 1, 2023

The Securities Information Processors (“SIPs”) will conduct data center failover testing as well as Market-Wide Circuit Breaker (“MWCB”) breach Level 1 and 2 on Saturday, April 1, 2023. In coordination with other market participants, MEMX will participate in the test and published a test script: MEMX 2023 Market-Wide Circuit Breaker Test Script. Certain members designated by MEMX […]

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Alerts and Notices Product Notices

Product Notice 23-61: Additional Exchange Products Approved for Trading

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Alerts and Notices Trader Alerts Uncategorized

Trader Alert 23-11: Holiday Reminder – Closed April 7, 2023

MEMX will be closed Friday, April 7, 2023, in observance of Good Friday. Normal trading will resume on Monday April 10, 2023. MEMX Market Hours and Holiday Schedule Please contact Market Operations with any questions. MEMX Market Operations mops@memx.com 1-833-415-6677  

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Effective Rule Filings Rule Filings

SR-MEMX-2023-06: Amendment to LLC Agreement of MEMX Holdings LLC

Date Filed: March 17, 2023 Description: Proposed rule change to amend and restate the Sixth Amended and Restated Limited Liability Company Agreement of MEMX Holdings LLC as the Seventh Amended and Restated Limited Liability Company Agreement of MEMX Holdings LLC.

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Alerts and Notices Product Notices

Product Notice 23-56: Additional Exchange Products Approved for Trading

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Alerts and Notices Product Notices

Product Notice 23-54 to 23-55: Additional Exchange Products Approved for Trading

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Alerts and Notices Product Notices

Product Notice 23-53: Additional Exchange Products Approved for Trading

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Alerts and Notices Product Notices

Product Notice 23-52: Additional Exchange Products Approved for Trading

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Alerts and Notices Product Notices

Product Notice 23-50 to 23-51: Additional Exchange Products Approved for Trading