About us
The Independent Power Transmission Operator S.A. (IPTO) was established with Law 4001/2011 and was organized and operates as an Independent Transmission Operator in line with the provisions of EU Directive 2009/72/EC.
The Company has the responsibilities and performs the duties of Owner and Operator of the Hellenic Electricity Transmission System (HETS), in accordance with the provisions of Law 4001/2011 the requirements in the Grid Code and the HETS operation license.
IPTO’s compliance with the requirements applicable to the Independent Transmission Operator model was certified by the Regulatory Authority for Energy in December 2012.
The mission of IPTO is the operation, control, maintenance and development of the Hellenic Electricity Transmission System, to ensure the country’s supply with electricity in an adequate, safe, efficient and reliable manner, as well as the operation of the electricity market for transactions outside the Day Ahead Scheduling, pursuant to the principles of transparency, equality and free competition.
Due to this critical role of the Company, all the necessary measures have been taken and all those necessary procedures have been set in place to ensure its independence, the strict adherence to the “equal treatment” principle for all System Users and Participants in the Electricity Market, transparency in its operation and respect of the confidentiality of the information which IPTO manages.
IPTO, as of 20 June 2017, has been following the Ownership Unbundling model and is fully harmonized with Directive 2009/72/EC.
IPTO’s shareholding structure is the following:

As Operator of the Hellenic Electricity Transmission System (HETS), IPTO’s mission is to assure the country’s supply with electricity in a safe, efficient and reliable manner, promoting free competition in the Greek electricity market, while ensuring the equal treatment of HETS users.
Our vision
Being one of the most efficient electricity transmission operators in Europe, providing added value to all interested parties in the framework of sustainable development, respecting man in parallel to the environment, to the benefit of the System Users and society as a whole.
Commitment for the country's uninterrupted energy supplyOur main objective is to ensure uninterrupted power supply for the country, meeting all quality, safety and efficiency standards, which governs all our activities related to performing our duties as the HETS Operator. | |
ImpartialityWe guarantee equal and non-discriminatory access to the System for all users. | |
TransparencyWe implement fully transparent procedures in our operations and provide all necessary information to market players in order to stimulate healthy competition. | |
| EfficiencyWe perform our System Operator duties in the most efficient way aiming at achieving optimal use of available resources, contributing to the country’s growth for the public benefit and creating value for all stakeholders. |
SustainabilityWe carry out our tasks according to the principles of sustainable development in respect with economic, social and environmental conditions by supporting research and development, technical training, and also by maximising the potential of our human resources. | |
Equal Treatment & InclusionEnsuring equal treatment of workers and creating an inclusive environment that incorporates and promotes diversity in everyday working life. |
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2subsidiaries Ariadne Interconnection Grid Telecom
51%State
24%State Grid
25%ASE
€ 5 bninvestments up to 2030
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1600Workers
21Ultra-high Voltage Centers
356Substations

SEleNe CC was established by the Transmission System Operators of Greece (IPTO), Italy (TERNA SpA), Romania (Transelectrica) and Bulgaria (ESO-EAD).
The mission of this new body is to ensure the efficient cooperation and coordination between the Electricity Systems and the Electricity Markets in Greece, Bulgaria and Romania, aiming to play a critical role in the new era of the integrated European electricity market.
ADMIE HOLDING holds a 51% stake in the share capital of the Independent Power Transmission Operator S.A. (IPTO), and is the first public sector company to be listed in the stock market after 11 years.
Acquisition of a 24% stake by State Grid, the industry's largest and most profitable company.
The Company has the responsibilities and performs the duties of the Owner and Operator of the Hellenic Electricity Transmission System (HETS).
IPTO’s compliance with the requirements applicable to the model of the Independent Transmission Operator was certified by the Regulatory Authority for Energy in December 2012.
The mission of IPTO is the operation, control, maintenance and development of the Hellenic Electricity Transmission System, to ensure the country’s supply with electricity in an adequate, safe, efficient and reliable manner, as well as the operation of the electricity market.





