# EDGAR Filing Document

**Accession Number:** 0001015650
**File Stem:** 0001193125-26-289380
**Filing Date:** 2026-6
**Character Count:** 5851
**Document Hash:** cb50341f6a811ac77b1749207a8f8a85
**Contains OCR:** False
**Source Format:** 

## Filing Content

## Filing Summary
**0001193125-26-289380.hdr.sgml**: 20260630

**ACCESSION NUMBER**: 0001193125-26-289380

**CONFORMED SUBMISSION TYPE**: 6-K

**PUBLIC DOCUMENT COUNT**: 1

**CONFORMED PERIOD OF REPORT**: 20260630

**FILED AS OF DATE**: 20260630

**DATE AS OF CHANGE**: 20260630

**FILER**: 

**COMPANY DATA:**
- **COMPANY CONFORMED NAME:** SK TELECOM CO LTD
- **CENTRAL INDEX KEY:** 0001015650
- **STANDARD INDUSTRIAL CLASSIFICATION:** RADIO TELEPHONE COMMUNICATIONS [4812]
- **ORGANIZATION NAME:** 06 Technology
- **EIN:** 999999999
- **FISCAL YEAR END:** 1231

**FILING VALUES:**
- **FORM TYPE:** 6-K
- **SEC ACT:** 1934 Act
- **SEC FILE NUMBER:** 333-04906
- **FILM NUMBER:** 261137985

**BUSINESS ADDRESS:**
- **ADDRESS IS A NON US LOCATION:** YES
- **STREET 1:** 11, EULJIRO2-GA
- **STREET 2:** JUNG-GU
- **CITY:** SEOUL
- **PROVINCE COUNTRY:** M5
- **BUSINESS PHONE:** 82-2-6100-1639

**MAIL ADDRESS:**
- **ADDRESS IS A NON US LOCATION:** YES
- **STREET 1:** 11, EULJIRO2-GA
- **STREET 2:** JUNG-GU
- **CITY:** SEOUL
- **PROVINCE COUNTRY:** M5

**FORMER COMPANY:**
- **FORMER CONFORMED NAME:** KOREA MOBILE TELECOMMUNICATIONS CORP
- **DATE OF NAME CHANGE:** 19960530

**UNITED STATES** 

**SECURITIES AND EXCHANGE COMMISSION** 

**Washington, D.C. 20549** 

**Form 6-K** 

**REPORT OF FOREIGN PRIVATE ISSUER** 

**PURSUANT TO RULE 13a-16 OR 15d-16 OF** 

**THE SECURITIES EXCHANGE ACT OF 1934** 

**FOR THE MONTH OF JUNE 2026** 

**Commission File Number: 333-04906** 

## SK Telecom Co., Ltd.
**(Translation of registrant's name into English)** 

**65, Euljiro, Jung-gu** 

**Seoul 04539, Korea** 

**(Address of principal executive office)** 

Indicate by check mark whether the registrant files or will file annual reports under cover of Form 20-F or Form 40-F.

Form 20-F ☒ Form 40-F ☐

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**Matters Relating to Corporate Sustainability Report of SK Telecom Co., Ltd. (the "Company")** 

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| | |
|:---|:---|
| &nbsp;&nbsp;&nbsp;1. Title of the Report | "SK Telecom Sustainability Report 2025" (the "Report") |
| &nbsp;&nbsp;&nbsp;2. Certifying Institution | DNV Business Assurance Korea |
| &nbsp;&nbsp;&nbsp;3. Reporting Standards | The Report has been prepared in accordance with the requirements of the GRI Standards, the sustainability reporting standards of the Global Reporting Initiative (GRI). It also references KSSB Sustainability Disclosure Standard No. 1 (General Requirements for Disclosure of Sustainability-Related Financial Information), No. 2 (Climate-Related Disclosure), as well as relevant standards such as SASB. |
| &nbsp;&nbsp;&nbsp;4. Filing Location | The Company's corporate website<br> (https://www.sktelecom.com/esg/lib/persist.do)<br>|
| &nbsp;&nbsp;&nbsp;5. Details of the Report | &nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp; 1. Summary<br> The Report is SK Telecom's Sustainability Report, published to share the company's sustainability management strategies, key activities, and achievements across environmental, social, and governance (ESG) areas with a wide range of stakeholders, including investors.<br>2. Reporting Period<br> The reporting period for this report is from January 1, 2025 to December 31, 2025. Some qualitative activities are included up to May 2026. For quantitative data, four years of data from 2022 to 2025 are presented to enable year-on-year trend analysis. In cases where significant changes have occurred in previously reported data, past data have been recalculated based on 2025 and reflected accordingly.<br>3. Scope of the Report<br> The geographical boundary of the Report is limited to the Republic of Korea, where over 99% of SK Telecom's revenue is generated and its main business sites are located. Unless otherwise specified, data from SK Telecom's overseas branches, subsidiaries, and affiliates are excluded from general descriptions and information. Financial data included in the Report are presented on a consolidated basis in accordance with the Korean International Financial Reporting Standards ("K-IFRS"), including K-IFRS No. 16, which has been applied since 2019. Non-financial data on environmental performance and fulfillment of corporate social responsibility are presented on a non-consolidated basis.<br>4. **Table of Contents**<br>Business Overview<br>- CEO Message, Business Overview, Sustainability Management Directions<br>Special Report<br>- From the Customer, By the Customer<br>Material Topics<br>- Information Security & Personal Data Protection, Technological Innovation, Climate Change Response |

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| | |
|:---|:---|
|  | &nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp; <br> ESG Management<br>- Environmental: Environmental Management, Natural Capital, Circular Economy<br>- Social: Employees, Health & Safety, Human Rights Management,<br>Customer-Centric Management, Network Stability, Supply Chain Management, Community Engagement<br>- Governance: Corporate Governance, Ethical Management, Compliance, AI Governance, Risk Management<br>Appendix<br>- Materiality Assessment, Stakeholder Engagement, Financial Statements, Non-Financial Statements, Index, About This Report |
| &nbsp;&nbsp;&nbsp;6. Submission Date | June 30, 2026 |
| &nbsp;&nbsp;&nbsp;7. Other Important Matters Relating to an Investment Decision | The English version of the Report is expected to be posted on the Company's corporate website within July 2026. |

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**SIGNATURES** 

Pursuant to the requirements of the Securities Exchange Act of 1934, the registrant has duly caused this report to be signed on its behalf by the undersigned, thereunto duly authorized.

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| | |
|:---|:---|
| **SK TELECOM CO., LTD.** | **SK TELECOM CO., LTD.** |
| (*Registrant*) | (*Registrant*) |
| By: | /s/ Taehee Kim |
| (*Signature*) | (*Signature*) |
| Name: | Taehee Kim |
| Title: | Vice President |

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Date: June 30, 2026