HEnEx - Hellenic Energy Exchange

The Hellenic Energy Exchange S.A. (HEnEx) is part of the EnEx Group and was founded on 18 June 2018 as a spin-off from the electricity market branch of LAGIE S.A.. Building upon experience gained over more than a decade, HEnEx has been designated by the Greek Regulatory Authority for Energy as the Nominated Electricity Market Operator (NEMO) and is operating the Greek day-ahead market, while working on the creation of an intraday electricity market and an energy derivatives market. HEnEx is also responsible for organising and operating Greek gas and environmental markets. Its subsidiary, EnEx Clearing House S.A. (EnExClear) provides clearing and settlement services.

HEnEx is committed to providing high quality, transparent, and non-discriminatory services to all market participants, working towards the EU’s target model and coupling its market with neighbouring countries. To that end, HEnEx has become a full member of the Price Coupling of Regions (PCR) initiative.

Corporate structure

HEnEx S.A. is a private company governed by Greek law. Its shareholders are:

  • Public Sector –  49%
    • DAPEEP (Hellenic RES & GO) 22%
    • ADMIE (Hellenic Power TSO) 20%
    • DESFA (Hellenic Gas TSO)  7%


  • Private Sector –  51%
    • ATHEX Group (Athens Exchange) 21%
    • EBRD (European Bank for Reconstruction and Development) 20%
    • CSE (Cyprus Exchange) 10%

Facts & Figures


110 Athinon Avenue


104 42 Athens



Date of foundation



Alexandros Papageorgiou

Number of employees (March 2023)


Annual report(s)

Traded commodities and traded volumes in 2022

Day-ahead power market: 56,80 TWh

Europex GA member

Alexandros Papageorgiou


Europex contact person

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General contact details


Hellenic Energy Exchange S.A.
110, Athinon Avenue
104 42 Athens