Query: What company has a 40% stake in OTE?
Context: Despite the liberalization of telephone communications in the country in the 1980s, OTE still dominates the Greek market in its field and has emerged as one of the largest telecommunications companies in Southeast Europe. Since 2011, the company's major shareholder is Deutsche Telekom with a 40% stake, while the Greek state continues to own 10% of the company's shares. OTE owns several subsidiaries across the Balkans, including Cosmote, Greece's top mobile telecommunications provider, Cosmote Romania and Albanian Mobile Communications.