SK Telecom Co. Ltd. SKM

What this company does

SK Telecom offers wireless voice and data transmission services throughout Korea using digital wireless networks that consist primarily of its 5G, LTE, WCDMA, Wi-Fi and LoRa networks. As of December 31, 2025, it had 23.5 million mobile phone subscribers, including the subscribers of mobile virtual network operators that lease its networks. Its 5G, LTE and WCDMA networks had an aggregate of 58,567 base stations on that date. Devices and services reach subscribers through branch offices and stores operated by its subsidiary PS&Marketing, more than 2,500 authorized exclusive dealers and a network of independent retailers. Its operations are reported in three segments: cellular services, fixed-line telecommunications services and other businesses. Cellular services segment revenue was Won 12,552.5 billion in 2025, or 73.4% of consolidated revenue. Fixed-line telecommunications services generated segment revenue of Won 4,191.1 billion in 2025, or 24.5% of consolidated revenue. The other businesses segment, consisting primarily of the T-commerce and former portal service businesses, produced revenue of Won 355.6 billion in 2025.

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