SK TELECOM CO LTD

6-K 1 d141168d6k.htm FORM 6-K

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 **

UNDER THE SECURITIES EXCHANGE ACT OF 1934

FOR THE MONTH OF September 2026

**COMMISSION FILE NUMBER:333-04906 **

SK Telecom Co., Ltd.

(Translation of registrant’s name into English)

65, Eulji-ro, 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 ☐

SEMI-ANNUAL BUSINESS REPORT

(From January 1, 2026 to June 30, 2026)

THIS IS A SUMMARY OF THE SEMI-ANNUAL BUSINESS REPORT ORIGINALLY PREPARED IN KOREAN WHICH IS IN SUCH FORM AS REQUIRED BY THE KOREAN FINANCIAL SERVICES COMMISSION.

IN THE TRANSLATION PROCESS, SOME PARTS OF THE REPORT WERE REFORMATTED, REARRANGED OR SUMMARIZED FOR THE CONVENIENCE OF READERS.

ALL REFERENCES TO THE “COMPANY” SHALL MEAN SK TELECOM CO., LTD. AND, UNLESS THE CONTEXT OTHERWISE REQUIRES, ITS CONSOLIDATED SUBSIDIARIES. REFERENCES TO “SK TELECOM” SHALL MEAN SK TELECOM CO., LTD., BUT SHALL NOT INCLUDE ITS CONSOLIDATED SUBSIDIARIES.

UNLESS EXPRESSLY STATED OTHERWISE, ALL INFORMATION CONTAINED HEREIN IS PRESENTED ON A CONSOLIDATED BASIS IN ACCORDANCE WITH THE INTERNATIONAL FINANCIAL REPORTING STANDARDS ADOPTED FOR USE IN KOREA(“K-IFRS”) WHICH DIFFER IN CERTAIN RESPECTS FROM GENERALLY ACCEPTED ACCOUNTING PRINCIPLES IN CERTAIN OTHER COUNTRIES, INCLUDING THE UNITED STATES. THE COMPANY HAS MADE NO ATTEMPT TO IDENTIFY OR QUANTIFY THE IMPACT OF THESE DIFFERENCES.

1. Company Overview

The following table sets forth a summary of the Company’s consolidated subsidiaries:

For a list of the Company’s subsidiaries as of June 30, 2026, see Note 1(2) of the notes to the Company’s interim consolidated financial statements attached hereto.

Changes in the Company’s consolidated subsidiaries during the six months ended June 30, 2026 are set forth below.

The Company’s businesses consist of (1) the wireless business including cellular voice, wireless data and wireless Internet services, (2) the fixed-line business including fixed-line telephone, high-speed Internet, and data and network lease services, and (3) other businesses including commercial retail data broadcasting channel services, among others.

Set forth below is a summary description of each of the Company’s businesses.

The total number of the Company’s consolidated subsidiaries as of June 30, 2026 was 18, including SK Broadband and PS&Marketing, among others.

2. Company History

March 1984: Establishment of Korea Mobile Telecommunications Co., Ltd.

November 1989: Listing on the KOSPI Market of the Korea Exchange

March 1997: Change of name to SK Telecom Co., Ltd.

March 2008: Acquisition of Hanaro Telecom (the predecessor entity of SK Broadband)

May 2018: Acquisition of ADT CAPS Co., Ltd. (“Former ADT CAPS”) through the acquisition of shares of Siren Holdings Korea Co., Ltd.

December 2018: Comprehensive exchange of shares of SK Infosec Co., Ltd. (“SK Infosec”)

April 2020: Merger of SK Broadband and Tbroad (“Tbroad Merger”)

December 2020: Spin-off of T map Mobility Co., Ltd. (“T Map Mobility”)

March 2021: Merger of SK Infosec and Former ADT CAPS

November 2021: Spin-off of SK Square Co., Ltd. (“SK Square”) from SK Telecom (the“Spin-off”)

As disclosed in the current report on Form 6-K titled “Completion of Share Exchange” furnished by the Company on May 29, 2026, the Company converted SK Broadband into a wholly-owned subsidiary in order to enhance management efficiency and flexibility and to increase corporate value by generating business synergies between the two companies. To this end, the Company acquired a 24.76% equity interest in SK Broadband in November 2024 and converted SK Broadband into a wholly-owned subsidiary through a comprehensive share exchange in May 2026.

On January 5, 2021, SK Broadband established Media S Co., Ltd. (“Media S”), a subsidiary engaged in the production and supply of broadcasting programs, through a capital contribution of Won 23.0 billion (representing a 100% equity interest), and the subsidiary was added as a member of the SK Group as of March 2, 2021. On June 23, 2022, SK Broadband acquired 5,000,000 additional shares of Media S for Won 25.0 billion through a capital increase by allocation to shareholders.

On March 30, 2022, the board of directors of SK Broadband approved the merger contract with Broadband Nowon Broadcasting Co., Ltd., as originally proposed. On October 5, 2022, the merger was completed.

On December 27, 2023, the board of directors and the shareholders of Home&Service, a subsidiary of SK Broadband, resolved to transfer Home&Service’s electric vehicle standard-charge business. The business was transferred to GS ChargEV on April 15, 2024.

On July 5, 2024, the board of directors and the shareholders of Home&Service approved the capital reduction with consideration. The capital reduction will be achieved by acquiring 2,770,000 common shares of Home&Service held by SK Broadband (at Won 7,237 per share) and immediately canceling such shares. In consideration of the capital reduction, Won 20,046 million will be paid to SK Broadband. Such transaction will not result in a change in SK Broadband’s ownership interest in Home&Service (100%) while the number of shares owned will decrease from 9,200,000 shares to 6,430,000 shares.

On May 12, 2025, the board of directors of SK Broadband resolved to acquire SK Inc.’s Pangyo Data Center in order to expand the data center business and generate synergy. The acquisition was completed on July 1, 2025.

On December 24, 2025, SK Broadband entered into a share purchase agreement to sell 100% (9,600,000 shares) of its ownership interest in Media S to Rapport Labs Inc.

On March 25, 2026 and May 27, 2026, the board of directors of SK Broadband resolved to cancel 383,168 and 27,408 treasury shares, respectively. The total number of issued shares changed to 401,634,869 shares following the cancellations.

On March 26, 2026, the board of directors of SK Broadband resolved to enter into a comprehensive share exchange agreement with SK Telecom, which was approved as originally proposed at the meeting of the board of directors held on April 27, 2026. The purpose of the share exchange was for SK Telecom to acquire 100% of the equity interest in SK Broadband by exchanging all issued shares, excluding the shares of SK Broadband held by SK Telecom as of the date of the share exchange, for cash consideration of Won 15,032 per share. There was no change in management control in terms of governance structure as a result of the share exchange, and SK Telecom and SK Broadband will continue to be maintained as listed and unlisted corporations, respectively.

[PS&Marketing]

PS&Marketing acquired 3,099,112 shares of SK M&Service (representing a 100% equity interest) to strengthen its competitiveness in distribution and promote synergies within the ICT businesses of SK Telecom and its affiliates. The transaction was completed on February 9, 2022.

On December 18, 2024, the board of directors of PS&Marketing approved the disposal of certain of its equity interest in SK M&Service, a subsidiary of PS&Marketing, as originally proposed. On February 25, 2025, PS&Marketing transferred 2,169,379 shares of SK M&Service (representing a 70% equity interest) to Samgu Inc. for Won 58,515 million. Following the transfer, PS&Marketing holds a 30% equity interest in SK M&Service, and SK M&Service has become excluded from the scope of the Company’s consolidated subsidiaries.

3. Total Number of Shares

(Unit: in Won and shares)

During the first half of 2026, the Company disposed 75,636 treasury shares for the purpose of compensation of officers and employees.

Of the treasury shares held by the Company, 99,272 shares will be utilized for the purpose of compensation for directors, officers and employees, and the remaining 1,601,312 shares are scheduled to be canceled through a resolution of the Board of Directors at a later date in order to enhance shareholder value. The timing and quantity of treasury shares to be disposed of for director, officer and employee compensation remain subject to change, depending on factors such as the share price at the time of compensation or exercise, the number of stock options exercised and the terms of the compensation programs for officers and employees, and accordingly, the number of shares to be canceled may also vary.

The Company plans to obtain approval for its treasury share retention and disposition plan at the General Meeting of Shareholders in March 2027.

4. Matters Concerning Articles of Incorporation

1. Business Overview

Each company in the consolidated entity is a separate legal entity providing independent services and products. The Company’s business is primarily separated into (1) the wireless business consisting of cellular voice, wireless data and wireless Internet services, (2) the fixed-line business consisting of fixed-line telephone, high-speed Internet, data and network lease services, among others and (3) other businesses consisting of commercial retail data broadcasting channel business, among others.

Set forth below is a summary description of the business of each of the Company’s material consolidated subsidiaries.

Wireless telecommunications companies provide services based on competitive strengths in handheld devices, affordable pricing, network coverage and an extensive contents library. The Company continues to maintain its reputation as the unparalleled premium network operator in the 5G market on the basis of its technological leadership and network management technology. With the world’s first commercialization of 5G technology in 2019, the Company continues to maintain its position as the top network operator in the 5G era and strives to provide differentiated services to its customers.

In order to strengthen its sales channels, the Company has been offering a variety of fixed-line and wireless telecommunications convergence products through its subsidiary, PS&Marketing. PS&Marketing provides differentiated service to customers through the establishment of new sales channels and product development. Additionally, SK O&S, the Company’s subsidiary responsible for the operation of the Company’s networks, including base stations and related transmission and power facilities, provides customers with quality network services and provides the Company with technological know-how in network operations.

The Company has been maintaining solid profitability based on the stable sales generated from its 5G subscribers, together with efficient investments in, and operation of, its wireless networks and stabilization of market competition. The number of the Company’s 5G subscribers has reached its maturation stage and continues to maintain a gradual upward trend. The Company recorded 17.97 million subscribers as of June 30, 2026, of which 5G subscribers accounted for 82%. The Company seeks to enhance profitability through stable market operations while striving to further expand customer choices and benefits in order to minimize the slowdown in the growths of wireless services revenue and Average Revenue Per User (“ARPU”). The Company seeks to achieve solid growth in profit from its wireless telecommunications business even in the mature 5G market by enhancing its fundamental competitive strengths, including product and channel realignment and the optimization of operations centered on customer lifetime value.

The telecommunications services market can be categorized into telecommunications services (such as fixed-line, wireless and leased line services, as well as sales intermediary services relating thereto and value-added services) and broadcasting and telecommunications convergence services (including IPTV and integrated fixed-line and wireless telecommunications services). Pursuant to the Telecommunications Business Act, the telecommunications services market can be further classified into basic telecommunications (fixed-line and wireless telecommunications), special category telecommunications (resale of telecommunications equipment, facilities and services) and value-added telecommunications (Internet connection and management, media contents and others).

The size of the domestic telecommunications services market is determined based on various factors specific to Korea, including the size of the population that uses telecommunications services and telecommunications expenditures per capita. While it is possible for Korean telecommunications service providers to provide services abroad through acquisitions or otherwise, foreign telecommunications services markets have their own characteristics depending, among others, on the regulatory environment and demand for telecommunications services.

The Korean mobile communications market is considered to have reached its maturation stage with more than a 100% penetration rate. However, the Korean mobile communications market continues to improve in the quality of services with the help of advances in network-related technology and the development of highly advanced smartphones which enable the provision of new information and communications technology (“ICT”) services for advanced multimedia contents, mobile commerce, mobility and other related services. In addition, theultra-low latency and high capacity characteristics of 5G networks as well as the advancement of artificial intelligence (“AI”) are expected to accelerate the introduction of new services and the growth of Internet-of-Things (“IoT”)-based business-to-business (“B2B”) businesses.

The Korean mobile communications market includes the entire population of Korea with mobile communications service needs, and almost every Korean is considered a potential user. Sales revenue related to data services has been growing due to the increasing popularity of smartphones and high-speed wireless networks. There is also a growing importance of the B2B segment, which creates added value by selling and developing various solutions. The telecommunications industry is a regulated industry requiring license and approval from the MSIT.

In the wireless business, industry players compete on the basis of the following three main competitive elements:

(i) brand competitiveness, which refers to the overall sense of recognition and loyalty experienced by customers with respect to services and values provided by a company, including the images created by a company’s comprehensive activities and communications on top of the actual services rendered;

(ii) product and service competitiveness, which refers to the fundamental criteria for wireless telecommunications services, including voice quality, service coverage, broad ranges of rate plans, diversified mobile Internet services, price and quality of devices, and customer service quality, as well as the ability to develop new services that meet customer needs in a market environment defined by convergence; and

(iii) sales competitiveness, which refers to novel and diversified marketing methods and the strength of the distribution network.

Set forth below is the historical market share of the Company (excluding MVNO subscribers).

For the six months ended June 30, 2026, SK Broadband recorded Won 2.31 trillion in revenue on a consolidated basis, which represented a 3.43% increase from Won 2.23 trillion for the six months ended June 30, 2025. Such increase was primarily attributable to the growth of SK Broadband’s high-speed Internet business resulting from an increase in the number of subscribers and the growth of its B2B business primarily focused on new data centers.

SK Broadband’s business is divided into the media business segment, which provides IPTV and cable TV services, and the fixed-line business segment, which provides high-speed Internet, telecommunications, leased lines and data center services.

For the six months ended June 30, 2026, the media business segment recorded Won 0.94 trillion in revenue, which represented a 1.1% decrease compared to the six months ended June 30, 2025. For the six months ended June 30, 2026, the fixed-line business segment recorded Won 1.37 trillion in revenue, which represented a 6.81% increase compared to the six months ended June 30, 2025.

The domestic telecommunications service industry displays the typical characteristics of a domestic industry given that its coverage area is limited to Korea. As a result, the size of the industry is greatly affected by the domestic user population and the level of telecommunications service expenditures in light of the domestic income level. Domestic telecommunications companies may expand overseas through mergers and acquisitions or direct expansion, but the overseas telecommunications service industries are subject to inherently different industry characteristics from the domestic one, depending on the regulatory and demand characteristics of each country.

The broadcasting business involves the planning, programming or production of broadcasting programs and the process of transmitting them to viewers through telecommunications facilities. The broadcasting market can primarily be categorized into terrestrial broadcasting, fixed-line TV broadcasting, satellite broadcasting and programming-providing businesses, in each case pursuant to the Broadcasting Act, as well as Internet multimedia broadcasting business pursuant to the Internet Multimedia Broadcast Services Act.

SK Broadband engages in the fixed-line TV broadcasting business, which is defined as the business of managing and operating fixed-line TV broadcasting stations (including their facilities and employees for the purpose of providing multi-channel broadcasting) and providing broadcasts through transmission and line facilities. The Internet multimedia broadcasting refers to the broadcasting of programs through a combination of various contents including data, video, voice, sound and/ore-commerce, including real-time broadcasting, while guaranteeing a consistent service quality through a bidirectional Internet protocol using a broadband integrated information network.

As a result of the government’s direct and indirect control over the fixed-line telecommunications industry, ranging from service licensing to business activities, the industry’s growth potential and degree of competition are greatly affected by the government’s regulatory policies. The fixed-line telecommunications industry is also a technology-intensive industry that evolves rapidly and continuously through the development of communications technology and equipment, which requires proactive responses in meeting the various needs of subscribers by developing new services and penetrating the market. Fixed-line telecommunications services have become essential commodities and act as the foundation for integration and convergence with various other services. The essential nature of such services provides stable demand, resulting in low sensitivity to economic conditions.

In addition, due to the government’s restrictive licensing policies aimed at efficient resource allocation, the Korean fixed-line services industry is marked by a high level of market concentration. In the fixed-line and wireless services markets, an oligopolistic structure has been established, centered around the Company (including SK Broadband), KT and LG U+. However, with the development of faster and more stable telecommunications technologies, integrated convergence products combining fixed-line and wireless communications with broadcasting have become the market standard. Consequently, competition among operators is now centered on providing high-quality services and ensuring customer satisfaction.

The high-speed Internet market continues to grow as mobile data traffic surges due to the expanding use of mobile devices for activities such as AI utilization, video streaming and online gaming. In particular, Wi-Fi services, which provide a stable and fast communication environment without imposing significant additional costs despite increased usage, have become essential communication services. Consequently, demand for Giga Internet, necessary for providing these services, is expanding, and related businesses are growing steadily.

In the pay TV market, competition is shifting from a focus on traditional channels and platforms to a content-centric model due to the expansion of global OTT services. Consequently, the Company is pursuing content differentiation to reflect the rapid changes in viewers’ content consumption preferences and usage patterns, and is seeking new growth opportunities in the home platform sector by providing personalized services utilizing AI technology, smart TVs andset-top boxes.

In the enterprise business market, growth opportunities are expanding, particularly in new areas such as AI data centers. Furthermore, to respond to continually increasing market demand and strengthen business competitiveness, the Company is focusing on securing core infrastructure, such as data centers and dedicated lines, and continues its efforts to establish a stable revenue base.

(Unit: in persons)

There is little difference among the services provided by operators ofhigh-speed Internet, fixed-line telephone and broadcasting services. Such services, which demonstrate characteristics of essential public utilities, are subject to a subscriber-based business model, and are not sensitive to cyclical economic changes. Due to the low income elasticity of telecommunications services, the overall telecommunications market is not expected to be particularly affected by an economic downturn.

Set forth below is the historical market share of SK Broadband.

(Unit: in percentages)

SK Broadband is engaged in a number of business areas including high-speed Internet, home telephone, corporate business, IPTV and cable TV pursuant to the relevant communications regulations such as the Telecommunications Business Act, the Internet Multimedia Broadcast Services Act and the Broadcasting Act. In each of its principal business areas, SK Broadband competes on the basis of price, service quality and speed. In the IPTV business, the ability to offer complex services and differentiated contents are becoming increasingly important. The basic telecommunications business is characterized by high barriers to entry, as it requires authorization from the Minister of the MSIT under the Telecommunications Business Act, and an oligopolistic structure has been established, comprising SK Broadband, KT and LG U+.

[Other Businesses]

SK Stoa operates the commercial retail data broadcasting channel business, offering an interactive service that integrates television home shopping and data home shopping services. The integrated television commerce service operated by SK Stoa allows television viewers to organize various product categories on the television screen and select and purchase desired products using a television remote control or mobile device, unlike traditional home shopping services that only allowed for real-time purchase through the relevant broadcast.

2. Key Financial Data by Business Line

3. Updates on Major Products and Services

4. Price Trends for Major Products

As of June 30, 2026, based on the Company’s standard monthly subscription plan, the basic service fee was Won 12,100 (including value-added tax) and the usage fee was Won 1.98 per second.

The Company, which commercially launched 5G technology for the first time in the world in 2019, has entered a mature phase with its 5G subscriber ratio exceeding 80%. Accordingly, in July 2026, the Company launched integrated 5G and LTE subscription plans to expand customer choices and improve user experience, and concurrently commenced the complimentary application of the “Ansim Data” service, which provides a maximum quality of service of 400 Kbps even after exhaustion of the basic allotted data, to all of its LTE subscription plans.

The new integrated subscription plans consist of the “Best” plan, which provides unlimited data at Won 89,000 to Won 129,000 per month (including value-added tax), and the “Lite” plan, which provides 6GB to 250GB of data at Won 39,000 to 79,000 per month. In addition, certain LTE subscription plans now offer 5G access, thereby expanding the scope of customer benefits.

The Company provides a variety of other subscription plans catering to subscriber demand, which may be reviewed on the Company’s website at www.tworld.co.kr.

The monthly subscription fees for the services offered by SK Broadband are as follows:

The above fees may vary depending on the conditions for subscription, including services provided, contract period and bundled products.

SK Broadband is preparing a variety of new rate plans for 2026. In January 2026, SK Broadband launched the “Giga Wi-Fi 7” plan, which utilizes the next-generation wireless standard, and offers a stable wireless Internet environment with transmission speeds up to twice as fast as the existing “Giga Wi-Fi 6” plan and minimizes latency and disconnections through multi-link operation (“MLO”) technology. In addition, a minimalist design was applied to better harmonize with interior spaces, and the plan is offered at a competitive discounted rate of Won 27,500 per month for 1 Gbps Internet when bundled with a wireless plan.

In February 2026, SK Broadband launched the “AI 5 Set-Top Box,” which featureson-device AI powered by a neural processing unit (“NPU”). The AI 5 Set-Top Box offers functions that optimize image quality and color tones for each scene and improve voice clarity, while incorporating a minimalist design and anultra-low-power design with standby power of less than 1W. It is available for Won 7,700 per month based on a three-year contract. Subscribers can also choose the “AI 5 Set-Top Box Care” package, which offers a reduced monthly fee of Won 5,500, as well as waivers on service call fees and compensation charges for damages, thereby enhancing customer convenience and satisfaction.

SK Broadband also provides a variety of other subscription plans based on consumer demand, which may be reviewed on SK Broadband’s website at www.bworld.co.kr.

5. Investment Status

(Unit: in billions of Won)

6. Revenues

7. Derivative Transactions

Currency and interest rate swap contracts under cash flow hedge accounting as of June 30, 2026 are as follows:** **

8. Major Contracts

None.

9. R&D Investments

Set forth below are the Company’s R&D expenditures.

(Unit: in millions of Won except percentages)

10. Other Information Relating to Investment Decisions

The Company manages its corporate brand and other product brands in a comprehensive way to protect and increase their value. The Company operates an intranet system called “Comm.ON” in order to implement consistent communication with consumers across various areas including branding, design, marketing and public relations, and systematically manages the development, registration and licensing of brands through such system.

As of June 30, 2026, the registered patents and trademarks held by the Company included 2,869 Korean-registered patents, 1,862 foreign-registered patents and 735 Korean-registered trademarks. The number of registered patents and trademarks is subject to constant change due to the acquisition of new rights, expiration of terms, abandonments and dispositions.

As of June 30, 2026, SK Broadband held 193 Korean-registered patents and 38 foreign-registered patents (including those held jointly with other companies). It also holds 245 Korean-registered trademarks. The number of registered patents and trademarks is subject to continual change due to the acquisition of new rights, expiration of terms, abandonments and dispositions.

The Company does not directly engage in any manufacturing and therefore does not undertake any industrial processes that emit pollutants into the air or industrial processes in which hazardous materials are used. Nevertheless, the Company clearly recognizes the severity of the climate crisis and has been diligently fulfilling its social obligations by establishing a systematic and practical environmental management strategy system. Under the vision of “realizing a sustainable future based on AI” and to achieve Net Zero by 2050, the Company is making efforts to (1) respond to climate change, (2) improve its environmental management system and (3) create a green culture. To this end, the Company was one of the first information technology companies in Korea to join the RE100 (Renewable Electricity 100%) initiative and signed a green premium contract with Korea Electric Power Corporation. The Company has been implementing company-wide adoption of renewable energy through efforts such as installing solar power generation equipment in its office buildings and base stations. In addition, the Company leads in energy savings and environmental protections based on AI technology, and recently became the first company in the telecommunications industry to obtain carbon emission rights by reducing greenhouse gas through integration of telecommunications equipment and technology upgrades.

SK Broadband does not directly engage in any manufacturing processes that emit environmental pollutants, and more than 99% of its greenhouse gas emissions is indirect emissions from its use of external electricity. SK Broadband was selected as a business subject to allocation of emission permits as part of Korea’s greenhouse gas emissions trading scheme that commenced in 2015, and it actively fulfills its obligations and consistently achieves the targets set by the government.

In 2021, SK Broadband declared its goal to achieve Net Zero by 2045 in an effort to actively participate in the international community’s response to climate change. Prior to the declaration, SK Broadband had already subscribed to the RE100 initiative in 2020. Since 2021, SK Broadband has participated in Korea Electrical Power Corporation’s renewable energy power purchase program, “Green Premium,” to purchase renewable energy and has installed additional solar power generation facilities to increase the self-production and use of renewable energy.

1. Summary Financial Information (Consolidated and Separate)

Below is the summary consolidated financial information of the Company as of June 30, 2026, December 31, 2025 and December 31, 2024 and for the six months ended June 30, 2026 and for the years ended December 31, 2025 and 2024. The Company’s interim consolidated financial statements as of June 30, 2026 and December 31, 2025 and for the six months ended June 30, 2026 and 2025, which are prepared in accordance with K-IFRS, are attached hereto.

Below is the summary separate financial information of the Company as of June 30, 2026, December 31, 2025 and December 31, 2024 and for the six months ended June 30, 2026 and for the years ended December 31, 2025 and 2024. The Company’s interim separate financial statements as of June 30, 2026 and December 31, 2025 and for the six months ended June 30, 2026 and 2025, which are prepared in accordance with K-IFRS, are attached hereto.

(Unit: in millions of Won except per share data)

2. Dividends and Others

In April 2024, the Company disclosed its shareholder return policy for fiscal years 2024 through 2026, under which the total amount of shareholder return for each year is expected to be at least 50% of the adjusted profit for the year on a consolidated basis. Shareholder returns are expected to be provided in the form of cash dividend distribution and/or through acquisition and cancellation of the Company’s treasury shares. The Board of Directors will make its determinations on dividends in accordance with such policy.

Adjusted consolidated profit is based on profit attributable to controlling interests, excludingone-time non-recurring gains and losses.

The Company seeks to enhance its enterprise value through stable business performance and by increasing long-term shareholder returns based on sustainable growth. The Company has established and is implementing a capital allocation strategy that balances the use of additional free cash flow generated from enhancements in its fundamental competitive strengths, including improvements in performance and productivity, across shareholder returns, investments for growth and enhancement in financial structure.

The Company determines the amount of its shareholder return in consideration of a comprehensive set of factors including its business performance, investment plans, financial status and prospects, and the Company may make shareholder return in the form of cash or shares in accordance with its Articles of Incorporation. Cash dividends are determined based on the Company’s consideration of investment needs for its continued future growth as well as its annual business performance and overall cash flow status. In the case of share dividends, the type of the shares to be distributed may be determined pursuant to the resolution of the Company’s general meeting of shareholders.

In accordance with the global trend towards stable dividend distribution, the Company adopted a quarterly dividend distribution policy through the approval of certain amendments to the Company’s Articles of Incorporation at the

37 th General Meeting of Shareholders held in March 2021 and has been distributing quarterly dividends since the second quarter of 2021.

The Company has engaged in repurchases and cancelations of its own shares from time to time to enhance its enterprise value in consideration of the market price of the Company’s shares and its financial resources. From 2020 to 2021, the Company purchased approximately Won 500 billion of treasury shares, and in May 2021, the Company canceled 8,685,568 units of previously acquired treasury shares (10.76% of the total number of shares issued at the time) to enhance shareholder value. In addition, in 2023, the Company purchased approximately Won 300 billion of treasury shares, and in February 2024, the Company canceled 4,043,091 units of treasury share (1.85% of the total number of shares issued at the time).

Not Applicable.

(Unit: in millions of Won, except per share data and percentages)

(1) Distribution of quarterly dividends of Won 830 per share was approved during the 491st Board of Directors’ Meeting on April 25, 2024.

(2) Distribution of quarterly dividends of Won 830 per share was approved during the 495th Board of Directors’ Meeting on July 25, 2024.

(3) Distribution of quarterly dividends of Won 830 per share was approved during the 498th Board of Directors’ Meeting on October 24, 2024.

(4) Distribution of cash dividends of Won 1,050 per share was approved during the 41st General Meeting of Shareholders on March 26, 2025.

(5) Distribution of quarterly dividends of Won 830 per share was approved during the 512th Board of Directors’ Meeting on April 23, 2025.

(6) Distribution of quarterly dividends of Won 830 per share was approved during the 515th Board of Directors’ Meeting on July 24, 2025.

(7)Non-distribution of dividends for the third quarter of 2025 was decided at the 517th Board of Directors’ Meeting on October 29, 2025.

(8)Non-distribution of annual dividends for the year ended 2025 was decided at the 520th Board of Directors’ Meeting on February 5, 2026.

(9) Distribution of quarterly dividends of Won 830 per share was approved during the 524th Board of Directors’ Meeting on April 27, 2026.

(10) Distribution of quarterly dividends of Won 830 per share was approved during the 526th Board of Directors’ Meeting on July 23, 2026.

3. Use of Direct Financing

Not Applicable.

4. Other Matters Related to Financial Information

Not applicable.

The Company establishes loss allowances based on the likelihood of recoverability of trade and other receivables based on their aging at the end of the period and past customer default experience for the past three years. With respect to trade receivables relating to wireless telecommunications services, the Company considers the likelihood of recovery based on past customer default experience and the length of default in connection with the type of default (e.g., whether the customer’s service has been terminated or is continued). Consistent with customary practice, the Company writes off trade and other receivables for which the prescription period has passed or that are determined to be impossible or economically too costly to collect, including receivables that are less than Won 200,000 and more than six months overdue and receivables that have been determined to be the subject of identity theft.

The Company holds handsets, ICT equipment for offline sales, etc. in inventory.

See Note 29 of the notes to the Company’s interim consolidated financial statements attached hereto for more information.

The following are key terms and conditions of bonds issued by SK Telecom as of June 30, 2026. The compliance status is as of June 30, 2026, the date of the latest financial statements including the review or audit opinion of the independent auditor applicable to the determination of compliance status, except for the compliance status of the restriction on changes of ownership structure, which is as of the end of the reporting period.

The following are key terms and conditions of bonds issued by SK Broadband as of June 30, 2026. The compliance status is as of June 30, 2026, the date of the latest financial statements including the review or audit opinion of the independent auditor applicable to the determination of compliance status, except for the compliance status of the restriction on changes of ownership structure, which is as of the end of the reporting period.

Omitted in semi-annual reports in accordance with applicable Korean disclosure rules. For more information, please refer to the Company’s annual business report for the year ended December 31, 2025.

1. Independent Auditors and Audit Opinions

1. Board of Directors

The Board of Directors is composed of eight members: two executive directors, five independent directors and onenon-executive director. The Board of Directors operates the following five committees: Independent Director Nomination Committee, Audit Committee, Future Strategy Committee, Compensation Committee and ESG Committee.

2. Audit System

The Company’s Audit Committee consists of four independent directors, Tay Seop Lim (financial and accounting expert), Chang Bo Kim, Mi Kyung Noh (financial and accounting expert) and Seong Yeob Lee.

3. Shareholders’ Exercise of Voting Rights

The Company implemented a proxy solicitation procedure for the 42nd General Meeting of Shareholders, pursuant to which shareholders were permitted to provide written proxy to exercise their voting rights.

1. Shareholdings of the Largest Shareholder and Related Persons

As of June 30, 2026, the Company’s largest shareholder was SK Inc. SK Inc. was established on April 13, 1991 and was made public on the securities market on November 11, 2009 under the identification code “034730.” SK Inc. is located at 26, Jong-ro, Jongno-gu, Seoul, Korea. SK Inc.’s telephone number is+82-2-2121-5114 and its website ishttps://www.sk-inc.com/.

2. Distribution of Shares

3. Share Price and Trading Volume in the Last Six Months

1. Officers and Employees

2. Compensation of Directors

(3) Amount by Type of Income

3. Individual Compensation of Directors and Officers

(1) Status of Stock Option Grants

(2) Status of Other Share-based Compensation Grants