For general queries related to SEMO please contact markethelpdesk@sem-o.com
For queries related to Market Registration please contact registration@sem-o.com
Market Participants should submit data and settlement queries to datasettlementquery@sem-o.com.
ROI: 1 800 778 111
NI: 0 8000 778 111
International: +353 1 669 2467
SEMO Customer Service SEMO Customer Service
42 Merrion Square Castlereagh House
Dublin 2 12 Manse Road
Republic of Ireland Belfast BT6 9RT
Northern Ireland
If you have any queries relating to SEMO, please use the contact form below. Please note that fields marked * are required.
SEMO is a joint venture between EirGrid plc and SONI Limited
