System Status

All Systems Operational

Uptime over the past 90 days. View historical uptime.
MEMX U.S. Equities Exchange Operational
90 days ago
99.97 % uptime
Today
MEMX U.S. Options Exchange Operational
90 days ago
99.79 % uptime
Today
User Portal (memxtrading.com) Operational
90 days ago
100.0 % uptime
Today
Operational
Degraded Performance
Partial Outage
Major Outage
Maintenance
Major outage
Partial outage
No downtime recorded on this day.
No data exists for this day.
had a major outage.
had a partial outage.

No incidents or maintenance related to this downtime.

Dec 17, 2025

No incidents reported today.

Dec 16, 2025

No incidents reported.

Dec 15, 2025

No incidents reported.

Dec 14, 2025

No incidents reported.

Dec 13, 2025

No incidents reported.

Dec 12, 2025

No incidents reported.

Dec 11, 2025

No incidents reported.

Dec 10, 2025

No incidents reported.

Dec 9, 2025

No incidents reported.

Dec 8, 2025

No incidents reported.

Dec 7, 2025

No incidents reported.

Dec 6, 2025

No incidents reported.

Dec 5, 2025

No incidents reported.

Dec 4, 2025
MEMX Equities Issue Resolved
Postmortem - Read details
Dec 4, 16:28 EST
Resolved - MEMX Equities has resumed trading in all symbols at 6:30 AM EST
Dec 4, 06:37 EST
Identified - MEMX Equities has identified the the issue and plans to resume trading all symbols at 6:30 AM EST.
Dec 4, 06:20 EST
Update - MEMX Equities has halted. Additional information to follow.

MEMX Market Operations | mops@memx.com | 1-833-415-6677
Dec 4, 05:06 EST
Update - MEMX Equities is currently investigating an issue. Additional information to follow.

MEMX Market Operations | mops@memx.com | 1-833-415-6677
Dec 4, 04:40 EST
Investigating - MEMX Equities is currently investigating an issue. Additional information to follow.

MEMX Market Operations | mops@memx.com | 1-833-415-6677
Dec 4, 04:37 EST
LEU ROUND LOT TRADING SIZE FOR THURSDAY 12/4/25
Resolved - Due to an incorrect change in the round lot configuration from 40 to 100 shares at NYSE for symbol LEU (Centrus Energy Corp.), LEU will remain at the CTA SIP start-of-day configured round lot size of 100 shares for trading today 12/4/25.

MEMX will trade LEU in around lot size of 100 shares today.
Dec 4, 06:12 EST
Dec 3, 2025

No incidents reported.

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