KT Corp. KT

What this company does

KT provides mobile voice and data telecommunications services in Korea based on 5G, 4G LTE and 3G W-CDMA technology, along with fixed-line telephone, VoIP telephone, broadband Internet access and data communication services. In mobile services, it had approximately 29.0 million subscribers as of December 31, 2025, consisting of 20.6 million MNO mobile subscribers and 8.4 million MVNO mobile subscribers. It provided broadband Internet access to approximately 10.2 million subscribers in Korea as of December 31, 2025, a market share of 40.3%. In 2025, its operating revenue of ₩28,548 billion was derived from mobile services (26.6%), fixed-line services (18.2%), media and content services (10.8%), financial services (12.2%), other business activities (15.2%) and sale of goods (17.0%). In fixed-line and VoIP telephone services, it had approximately 10.9 million subscribers, consisting of 7.7 million PSTN subscribers and 3.2 million VoIP subscribers, and held a 51.7% share of the fixed-line local telephone and VoIP market as of December 31, 2025.

Written from the business description in KT Corporation's annual report to the U.S. Securities and Exchange Commission, filed 29 April 2026. Every sentence was checked against that document before publication.