Dear Users,

We would like to inform you that a planned outage of OTE systems will take place on Tuesday, July 21, 2026. During this outage, all affected environments will be completely unavailable, including automated communications.

The unavailability is scheduled for the following maintenance window:

• OTE Trading System Production and Sandbox Environments: from 16:30 to 20:00

Thank you for your understanding, and we apologize for any inconvenience this may cause.