MET Sales and Trading, the trading, wholesale and sales segment of Swiss-based integrated energy company MET Group, has acquired a majority stake in Zephiros Energy Trading S.A., opening a new chapter for the company and for renewable and battery asset owners in Greece.
Zephiros Energy Trading S.A. represents the aggregation activity of Zephiros Group. It provides integrated services to renewable energy producers, investors and asset owners in the Greek energy market. As a licensed Renewable Energy Aggregator (RES Aggregator), the company combines renewable energy aggregation and related energy trading activities with technical, operational and commercial expertise across wind, solar and battery energy storage, supporting energy assets throughout their lifecycle.
The partnership pairs Zephiros’ local market knowledge with MET Group’s international trading expertise, financial strength and market reach. The acquisition also supports MET Group’s long-term growth strategy, opening new opportunities across the Greek energy sector, particularly in the rapidly developing renewable energy and battery energy storage segments.
Following completion of the transaction, Georgios Oikonomou has been appointed CEO of Zephiros Energy Trading S.A. and will lead the company into its next stage of development.
“This transaction marks an exciting new chapter for Zephiros Energy Trading. With MET Group’s expertise, market reach and financial strength, we are well positioned to build on our success and further strengthen our role as a trusted renewable energy aggregator in Greece. Our focus remains on helping producers and investors optimize their portfolios while expanding into complementary areas such as battery energy storage and flexible asset optimization.
Georgios Oikonomou, CEO, Zephiros Energy Trading S.A.
“This strategic partnership combines Zephiros Energy Trading’s local expertise with MET Group’s trading capabilities, market reach and financial strength, creating new opportunities for renewable and battery asset owners in Greece. Together, we are well positioned to strengthen our role in renewable energy aggregation, develop new products and services, and support the growing flexibility needs of the Greek energy market.”
Kamen Ivchev, representing the Board of Directors, Zephiros Energy Trading S.A.
“Joining forces with MET Group is a defining moment for Zephiros Energy Trading. MET Group brings a level of international trading expertise, financial strength and market access that will meaningfully accelerate what we can achieve in the Greek renewable energy sector. With MET Group’s backing, we are well positioned to strengthen our role as a leading renewable energy aggregator in Greece — combining our local market knowledge with MET Group’s proven trading capabilities and broader European reach to optimize portfolios and create real value for our partners. Looking ahead, MET Group’s support also gives us the foundation to develop new products and services for our partners, further broadening what we can offer the Greek renewable energy market. We look forward to this next chapter with confidence, as Zephiros Energy Trading continues to grow into a stronger, more capable partner for the Greek energy transition.”
Alexandros Karadimas, Board Member, Zephiros Energy Trading S.A.
About ZEPHIROS Group
Zephiros Group is an independent multi-technology renewable energy company with 30 years of experience in Greece and beyond, active both as an energy producer and a service provider. The Group owns and operates wind and PV power generation assets while also delivering integrated renewable energy solutions across wind, solar and battery energy storage systems for third-party investors, asset managers and utilities. Its offering spans the full asset lifecycle, from project development, engineering and construction management, through operations and maintenance, to investments and brokerage, and aggregation. Zephiros is headquartered in Marousi, Athens, with additional offices in Alexandroupoli, Larissa and Crete.
About MET Group
MET Group is an integrated European energy company, headquartered in Switzerland, with activities and assets in natural gas, LNG, power and renewables. MET serves customers in 24 countries through subsidiaries and is present in 33 national energy markets as well as 51 international trading hubs. The company’s 1,400+ employees represent close to 60 nationalities. MET has extensive experience operating renewable and flexible assets, thus providing the widest possible support to energy transition. In 2025, MET Group’s consolidated sales revenue amounted to EUR 28.6 billion, with a total transacted volume of natural gas amounting to 241 BCM and total traded electricity of 160 TWh.
