SK Telecom Co., Ltd. 2025 Annual Financial Summary
Business Context and Reporting Period
This Form 6-K filing contains the audited consolidated financial statements for SK Telecom Co., Ltd. and its subsidiaries for the fiscal year ended December 31, 2025. The report was signed on March 11, 2026, and audited by KPMG Samjong Accounting Corp., which issued an unmodified opinion on both the financial statements and the effectiveness of Internal Control over Financial Reporting (ICFR). The Group operates primarily in South Korea, focusing on cellular services, fixed-line telecommunications, and other digital businesses.
Key Financial Metrics (Year Ended Dec 31, 2025)
| Metric | 2025 (W million) | 2024 (W million) |
|---|---|---|
| Operating Revenue | 17,099,213 | 17,940,609 |
| Operating Profit | 1,073,215 | 1,823,409 |
| Profit for the Year | 375,084 | 1,387,095 |
| Profit Attributable to Parent | 408,410 | 1,250,155 |
| Net Cash from Operating Activities | 3,923,847 | 5,087,285 |
| Total Assets | 30,107,783 | 30,515,255 |
| Total Liabilities | 17,152,491 | 18,687,621 |
| Debt-to-Equity Ratio | 132.40% | 158.00% |
Material Changes vs. Prior Period
- Significant Profit Decline: Profit for the year dropped by approximately 73% to W375 billion, primarily driven by a W134.8 billion penalty imposed by the Personal Information Protection Commission related to a cybersecurity incident and W212 billion in associated response costs.
- Revenue Reduction: Operating revenue decreased by 4.7% to W17.1 trillion. Wireless service revenue was reduced by W454 billion due to customer appreciation packages and fee waivers implemented in response to the cybersecurity incident.
- Investment Gains/Losses: The Group recognized a net loss of W63.6 billion relating to investments in subsidiaries, associates, and joint ventures, compared to a gain of W321.8 billion in 2024. This includes a significant loss recognized on the associate Rebellions Inc. (formerly SAPEON Korea Inc.).
- Dividend Policy: The dividend yield ratio decreased to 3.10% in 2025 from 6.41% in 2024, reflecting the lower profitability.
Guidance, Risks, and Unusual Items
- Cybersecurity Incident Impact: The filing explicitly details the financial impact of a major cybersecurity incident, including regulatory penalties and customer compensation, which materially affected the 2025 bottom line.
- Key Audit Matters: Auditors highlighted the "Existence and Accuracy of Wireless Service Revenue" (W9.7 trillion) and the "Impairment Assessment of Goodwill" allocated to the Fixed-Line Telecommunication Services CGU (W764 billion) as critical areas requiring significant judgment.
- Strategic Investments: The Group continues to invest heavily in AI and infrastructure, evidenced by the acquisition of the Pangyo Data Center business from SK Inc. (a related party) for W507 billion and significant holdings in associates like SK China Company Ltd. and Rebellions Inc.
- Commitments: The Group has a 10-year contract with SK Inc. for AWS services valued at USD 800 million, commencing July 2025.
Investor Verification Checklist
- Cybersecurity Recovery: Verify the status of the cybersecurity incident remediation and whether the W134.8 billion penalty and W212 billion in costs represent the full extent of the financial impact.
- Goodwill Valuation: Review the assumptions used in the Value-in-Use (VIU) model for the Fixed-Line Telecommunication Services CGU, specifically the perpetual growth rate (1.0%) and discount rate (6.3% pre-tax), given the sector's volatility.
- Investment Portfolio Performance: Assess the performance of major associates, particularly Rebellions Inc., which contributed significantly to the investment loss in 2025.
- Cash Flow Sustainability: Confirm that the decline in operating cash flow (down W1.16 trillion) is temporary and does not impact the ability to service the W8.2 trillion in debentures and maintain dividend payouts.
- Related Party Transactions: Scrutinize the W507 billion acquisition of the Pangyo Data Center from SK Inc. to ensure fair value and strategic alignment.