5 Most Valuable Greek Companies In The World

3. Hellenic Telecommunications Organization S.A. (HTO.AT)

Market Cap as of February 6, 2023: $6.8 billion

Hellenic Telecommunications Organization S.A. (HTO.AT) is a Greek telecommunications company that provides a range of services, including fixed-line and mobile services, broadband, internet, and television services. The company’s operating segments include OTE, Telekom Romania, Telekom Romania Mobile, and Cosmote Group. The OTE segment of the company generates the majority of the company’s revenue.