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.

I.	COMPANY OVERVIEW

1. Company Overview

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

		Number of Consolidated Subsidiaries
Classification		Beginning of the Reporting Period		Additions		Subtractions		End of the Reporting Period		Number of Material Subsidiaries*
Listed Companies		0		0		0		0		0
Unlisted Companies		19		0		1		18		12
Total		19		0		1		18		12

*	“Material Subsidiary” means a subsidiary with total assets of Won 75 billion or more as of the end of the previous fiscal year.

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.

Change		Name		Remarks
Exclusions		Global AI Platform Corporation Korea Co., Ltd. (“Global AI Platform Corporation”)		Liquidated during the reporting period

A.	Corporate Legal Business Name: SK Telecom Co., Ltd.

B.	Date of Incorporation: March 29, 1984

C.	Location of Headquarters

(1)

Address: 65 Euljiro, Jung-gu, Seoul, Korea

(2)

Phone: +82-2-6100-2114

(3)

Website: http://www.sktelecom.com

D.	Major Businesses

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.

Classification		Material Entities		Description of Business		Proportion of Revenue
Wireless business		SK Telecom		Mobile telephone, wireless data, information and communications services, etc.		74%
		PS&Marketing Co., Ltd. (“PS&Marketing”)
		SK O&S Co., Ltd. (“SK O&S”)
Fixed-line business		SK Broadband Co., Ltd. (“SK Broadband”)		Telephone, high-speed Internet, data, communications network leasing services, etc.		24%
		SK Telink Co., Ltd. (“SK Telink”)
		Home & Service Co., Ltd. (“Home&Service”)
Other businesses		SK stoa Co., Ltd. (“SK Stoa”)		Commercial retail data broadcasting channel services, database and online information provision services, etc.		2%
Total						100%

3

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

E.	Credit Ratings

(1)

Corporate bonds and other long-term securities

Credit Rating Date		Subject of Rating		Credit Rating		Credit Rating Entity (Credit Rating Range)		Rating Classification
February 7, 2024		Corporate bond		AAA (Stable)		Korea Ratings		Current rating
February 7, 2024		Corporate bond		AAA (Stable)		Korea Investors Service, Inc.		Current rating
February 7, 2024		Corporate bond		AAA (Stable)		NICE Investors Service, Co., Ltd.		Current rating
June 7, 2024		Hybrid securities		AA+ (Stable)		Korea Ratings		Current rating
June 7, 2024		Corporate bond		AAA (Stable)		Korea Ratings		Current rating
June 11, 2024		Hybrid securities		AA+ (Stable)		Korea Investors Service, Inc.		Current rating
June 11, 2024		Corporate bond		AAA (Stable)		Korea Investors Service, Inc.		Current rating
June 17, 2024		Hybrid securities		AA+ (Stable)		NICE Investors Service, Co., Ltd.		Current rating
June 17, 2024		Corporate bond		AAA (Stable)		NICE Investors Service, Co., Ltd.		Current rating
November 26, 2024		Corporate bond		AAA (Stable)		Korea Investors Service, Inc.		Current rating
November 27, 2024		Corporate bond		AAA (Stable)		NICE Investors Service, Co., Ltd.		Current rating
November 27, 2024		Corporate bond		AAA (Stable)		Korea Ratings		Current rating
February 10, 2025		Corporate bond		AAA (Stable)		Korea Ratings		Current rating
February 10, 2025		Corporate bond		AAA (Stable)		Korea Investors Service, Inc.		Current rating
February 10, 2025		Corporate bond		AAA (Stable)		NICE Investors Service, Co., Ltd.		Current rating
August 28, 2025		Corporate bond		AAA (Stable)		Korea Investors Service, Inc.		Current rating
September 1, 2025		Corporate bond		AAA (Stable)		Korea Ratings		Current rating
August 29, 2025		Corporate bond		AAA (Stable)		NICE Investors Service, Co., Ltd.		Current rating
June 2, 2026		Corporate bond		AAA (Stable)		Korea Ratings		Regular rating
June 19, 2026		Corporate bond		AAA (Stable)		Korea Investors Service, Inc.		Regular rating
June 16, 2026		Corporate bond		AAA (Stable)		NICE Investors Service, Co., Ltd.		Regular rating

*	Rating definition: “AAA” – The certainty of principal and interest payment is at the highest level with extremely low investment risk and is stable such that it will not be influenced by reasonably foreseeable changes in external factors.

**	Rating definition: “AA” – The certainty of principal and interest payment is very high with very low investment risk, but has slightly inferior factors compared to securities that are rated “AAA.”

***	From ratings “AA” to “B,” “+” and “-” signs are attached depending on the relative superiority within the grade.

4

(2)

Commercial paper (“CP”) and short-term bonds

Credit Rating Date		Subject of Rating		Credit Rating		Credit Rating Entity (Credit Rating Range)		Rating Classification
June 7, 2024		Short-term bond		A1		Korea Ratings		Current rating
June 7, 2024		CP		A1		Korea Ratings		Current rating
June 11, 2024		Short-term bond		A1		Korea Investors Service, Inc.		Current rating
June 11, 2024		CP		A1		Korea Investors Service, Inc.		Current rating
June 17, 2024		Short-term bond		A1		NICE Investors Service Co., Ltd.		Current rating
June 17, 2024		CP		A1		NICE Investors Service Co., Ltd.		Current rating
November 26, 2024		Short-term bond		A1		Korea Investors Service, Inc.		Current rating
November 26, 2024		CP		A1		Korea Investors Service, Inc.		Current rating
November 27, 2024		Short-term bond		A1		Korea Ratings		Current rating
November 27, 2024		CP		A1		Korea Ratings		Current rating
November 27, 2024		Short-term bond		A1		NICE Investors Service Co., Ltd.		Current rating
November 27, 2024		CP		A1		NICE Investors Service Co., Ltd.		Current rating
June 12, 2025		Short-term bond		A1		Korea Investors Service, Inc.		Current rating
June 12, 2025		CP		A1		Korea Investors Service, Inc.		Current rating
June 12, 2025		Short-term bond		A1		Korea Ratings		Current rating
June 12, 2025		CP		A1		Korea Ratings		Current rating
June 13, 2025		Short-term bond		A1		NICE Investors Service Co., Ltd.		Current rating
June 13, 2025		CP		A1		NICE Investors Service Co., Ltd.		Current rating
June 2, 2026		CP		AAA (Stable)		Korea Ratings		Current rating
June 19, 2026		CP		AAA (Stable)		Korea Investors Service, Inc		Current rating
June 16, 2026		CP		AAA (Stable)		NICE Investors Service Co., Ltd		Current rating
June 2, 2026		Short-term bond		AAA (Stable)		Korea Ratings		Current rating
June 19, 2026		Short-term bond		AAA (Stable)		Korea Investors Service, Inc		Current rating
June 16, 2026		Short-term bond		AAA (Stable)		NICE Investors Service Co., Ltd		Current rating

*	Rating definition: “A1” – Timely repayment capability is at the highest level with extremely low investment risk and is stable such that it will not be influenced by reasonably foreseeable changes in external factors.

5

(3)

International credit ratings

Credit Rating Date		Subject of Rating		Credit Rating		Credit Rating Entity (Credit Rating Range)		Rating Classification
February 25, 2024		Bonds denominated in foreign currency		A- (Stable)		S&P Global Ratings		Regular rating
May 2, 2024		Bonds denominated in foreign currency		A- (Stable)		Fitch Ratings		Regular rating
May 24, 2024		Bonds denominated in foreign currency		A3 (Stable)		Moody’s Investors Service		Regular rating
January 7, 2025		Bonds denominated in foreign currency		A- (Stable)		Fitch Ratings		Regular rating
February 25, 2025		Bonds denominated in foreign currency		A- (Stable)		S&P Global Ratings		Regular rating
April 2, 2025		Bonds denominated in foreign currency		A3 (Stable)		Moody’s Investors Service		Regular rating
November 4, 2025		Bonds denominated in foreign currency		A- (Stable)		Fitch Ratings		Regular rating
April 7, 2026		Bonds denominated in foreign currency		A- (Stable)		S&P Global Ratings		Regular rating

(4)

Listing (registration or designation) of Company’s shares and special listing status

Listing (Registration or Designation) of Stock		Date of Listing (Registration or Designation)		Special Listing
KOSPI Market of Korea Exchange		November 7, 1989		Not applicable

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”)

A.	Location of Headquarters

-

22 Dohwa-dong, Mapo-gu, Seoul (July 11, 1988)

-

16-49 Hangang-ro 3-ga, Yongsan-gu, Seoul (November 19, 1991)

-

267 Namdaemun-ro 5-ga, Jung-gu, Seoul (June 14, 1995)

-

99 Seorin-dong, Jongno-gu, Seoul (December 20, 1999)

-

65 Euljiro, Jung-gu, Seoul (December 13, 2004)

6

B.	Significant Changes in Management

Date of Change		Shareholder Meeting Classification		Appointment				Term Termination or Dismissal
				Newly Appointed		Re-elected
March 25, 2022		General Meeting of Shareholders		Jong Ryeol Kang		Seok-Dong Kim		—
March 28, 2023		General Meeting of Shareholders		Hae Yun Oh		Yong-Hak Kim, Junmo Kim		Jung Ho Ahn
March 26, 2024		General Meeting of Shareholders		Yang Seob Kim, Sung Hyung Lee, Mi Kyung Noh		Young Sang Ryu		Kyu-Nam Choi, Youngmin Yoon
March 26, 2025		General Meeting of Shareholders		Dong Soo Kang, Chang Bo Kim		—		Jong Ryeol Kang, Sung Hyung Lee, Seok-Dong Kim
March 26, 2026		General Meeting of Shareholders		Jaihun Jung, Myung Jin Han, Poong Young Yoon, Seong Yeob Lee, Tay Seop Lim		Hae Yun Oh		Young Sang Ryu, Yang Seob Kim, Dong Soo Kang, Yong-Hak Kim, Junmo Kim

*	At the 42nd General Meeting of Shareholders held on March 26, 2026, Tay Seop Lim and Seong Yeob Lee were newly elected as an independent director/audit committee member and an audit committee member, respectively.

C.	Mergers, Acquisitions and Restructuring

[SK Telecom]

(1)

Conversion of SK Broadband into a wholly-owned subsidiary

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.

[SK Broadband]

(1)

Establishment of a subsidiary and acquisition of shares

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.

(2)

Merger

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.

(3)

Transfer of business

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.

(4)

Capital reduction of subsidiary

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.

7

(5)

Acquisition of business

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.

(6)

Sale of equity interest in subsidiary

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.

(7)

Cancellation of repurchased shares

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.

(8)

Comprehensive share exchange

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]

(1)

Acquisition of shares of SK M&Service

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.

(2)

Disposal of equity interest in SK M&Service

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

A.	Total Number of Shares

(As of June 30, 2026)						(Unit: in shares and percentages)
Classification		Share Type												Remarks
		Common Shares				Preferred Shares				Total
I. Total number of authorized shares			670,000,000				—				670,000,000				—
II. Total number of shares issued to date			304,927,159				—				304,927,159				—
III. Total number of shares canceled to date			90,137,106				—				90,137,106				—
a. reduction of capital			—				—				—				—
b. canceled with profit			90,137,106				—				90,137,106				—
c. redemption of redeemable shares			—				—				—				—
d. others			—				—				—				—
IV. Total number of issued shares (II-III)			214,790,053				—				214,790,053				—
V. Number of treasury shares			1,732,142				—				1,732,142				—
VI. Number of outstanding shares (IV-V)			213,057,911				—				213,057,911				—
VII. Percentage of treasury shares held			0.81	%			—				0.81	%			—

*

Following the stock split of October 28, 2021 (the “Stock Split”) and the split-off of November 1, 2021, the total number of issued shares changed from 72,060,143 shares (par value of Won 500 per share) to 218,833,144 shares (par value of Won 100 per share). Additionally, the total number of issued shares changed to 214,790,053 shares following the cancellation of 4,043,091 treasury shares on February 5, 2024.

8

B.	Treasury Shares

(As of June 30, 2026)												(Unit: in shares)
Acquisition Methods						Share Type		At the Beginning of Period				Changes												At the End of Period
												Acquired (+)				Disposed (-)				Canceled (-)
Acquisition pursuant to the Financial Investment Services and Capital Markets Act of Korea		Direct acquisition		Direct acquisition from market		Common shares			—				—				—				—				—
						Preferred shares			—				—				—				—				—
				Direct over-the-counter acquisition		Common shares			—				—				—				—				—
						Preferred shares			—				—				—				—				—
				Tender offer		Common shares			—				—				—				—				—
						Preferred shares			—				—				—				—				—
				Sub-total (a)		Common shares			—				—				—				—				—
						Preferred shares			—				—				—				—				—
		Acquisition through trust and other agreements		Held by trustee		Common shares			—				—				—				—				—
						Preferred shares			—				—				—				—				—
				Held in actual stock		Common shares			1,807,778				—				75,636				—				1,732,142
						Preferred shares			—				—				—				—				—
				Sub-total (b)		Common shares			1,807,778				—				75,636				—				1,732,142
						Preferred shares			—				—				—				—				—
Other acquisition (c)						Common shares			—				—				—				—				—
						Preferred shares			—				—				—				—				—
Total (a+b+c)						Common shares			1,807,778				—				75,636				—				1,732,142
						Preferred shares			—				—				—				—				—

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

C.	Status of Direct Acquisitions and Disposal of Treasury Shares

(As of June 30, 2026)

(Unit: in Won and percentages)

Classification

Expected Acquisition (Disposal) Period

Expected Value of Shares (A)

Executed Value of Shares (B)

Execution Ratio (B/A)

Reporting Date

Start Date

End Date

Direct Disposal

Jan. 29, 2024

Feb. 29, 2024

24,508,242,000

24,707,496,000

101

Feb. 2, 2024

Direct Disposal

Apr. 26, 2024

May 31, 2025

279,874,700

280,422,400

100

Apr. 30, 2024

Direct Disposal

Apr. 25, 2025

May 31, 2025

279,936,000

261,954,000

94

Apr. 30, 2025

Direct Disposal

May 2, 2025

Mar. 26, 2027

14,240,890,460

5,466,438,328

38

—

Direct Disposal

Feb. 4, 2026

Mar. 25, 2026

3,606,096,376

1,161,969,600

32

Mar. 27, 2026

Direct Disposal

Feb. 12, 2026

Mar. 25, 2027

11,101,630,700

677,286,300

6

—

Direct Disposal

Apr. 28, 2026

May 31, 2026

5,195,200,000

5,471,321,600

105

May 18, 2026

*

As the disposal on May 2, 2025 involved the delivery of treasury shares in connection with the exercise of certain outstanding stock options, the submission of the disposal results was omitted in accordance with Article 5-9(4) of the Regulation on Securities Issuance and Disclosure. Such disposal concerns the disclosure of all stock options granted at the 36th General Meeting of Shareholders as shares scheduled for disposal, triggered by the initial exercise of stock options. The confirmed number of shares scheduled for disposal is 92,608 shares.

**

The disposal on February 4, 2026 involved the disposal of treasury shares in connection with the exercise of stock options granted at the 37th General Meeting of Shareholders. All stock options exercised during this period were settled through the “compensation in treasury shares for the difference in price” method, whereby treasury shares corresponding to the difference between the closing price on the exercise date and the exercise price were delivered (after deduction of withholding amounts including taxes), resulting in a difference from the number of shares disclosed as scheduled for disposal.

***

As the disposal on February 12, 2026 involved the delivery of treasury shares in connection with the exercise of certain outstanding stock options, the submission of the disposal results was omitted in accordance with Article 5-9(4) of the Regulation on Securities Issuance and Disclosure. Such disposal concerns the disclosure of all stock options granted at the 38th General Meeting of Shareholders as shares scheduled for disposal, triggered by the initial exercise of stock options. The confirmed number of shares scheduled for disposal is 7,528 shares.

9

D.	Status of Trust Agreement on Repurchase of Treasury Shares

(As of June 30, 2026)

(Unit: in Won and percentages)

Classification

Agreement Period

Maximum Value of Treasury Shares to be Acquired under Agreement (A)

Actual Value of Treasury Shares Acquired under Agreement (B)

Execution Ratio (B/A)

Reporting Date

Start Date

End Date

Trust Agreement Execution

Aug. 28, 2020

Apr. 30, 2021

W500,000,000,000

W499,646,025,000

99.93%

Apr. 30, 2021

Trust Agreement Execution

Jul. 27, 2023

Jan. 26, 2024

W300,000,000,000

W301,274,969,250

100.42%

Jan. 26, 2024

*	The Company completed the repurchase of treasury shares pursuant to the Trust Agreement on July 27, 2023, and reported the results of the termination of the Trust Agreement on January 26, 2024.

E.	Status of Cancellation of Treasury Shares

(Unit: in Won and shares)

Cancellation Date

Cancellation Method

Share Type

Number of Shares Canceled

Value of Shares Canceled

May 6, 2021

Share repurchase and cancellation

Common share

8,685,568

1,965,952,260,096

February 5, 2024

Share repurchase and cancellation

Common share

4,043,091

200,000,000,000

*	The number of shares canceled on May 6, 2021 is based on the figures prior to the Stock Split.

F.	Status of Treasury Shares Held

(As of June 30, 2026)																				(Unit: in shares and percentages)
Classification				Share Type		Number of Shares Held				Ratio to Total Issued Shares				Purpose of Acquisition		Year Acquired		Cancellation Deadline		Approved Details of Holding/Disposal Plan
																				Approval Date		Deadline		Purpose
Acquisition within distributable profits		Direct holding		Common shares			1,732,142				0.81			Enhancement of shareholder value (partial cancellation of shares)		2023		2027		March 26, 2026		Payment date in accordance with the operation of the compensation plan for officers and employees		Compensation for officers and employees
		Trustee holding		—			—				—			—		—		—		—		—		—
Other acquisitions				—			—				—			—		—		—		—		—		—
Total				Common shares			1,732,142				0.81

*	The acquisitions of shares occurred between 2023 and 2024 and the cancellation deadline is September 6, 2027.

10

G.	Short-Term Plan for Acquisition, Disposal and Cancellation of Treasury Shares

(Relevant Period: January 1, 2026 to December 31, 2026)								(Unit: in shares and percentages)
Classification		Form of Holding		Share Type		Original Purpose of Acquisition		Transaction Method		Quantity		Ratio to Total Issued Shares		Reason for Decision
Acquisition		—		—		—		—		—		—		—
Disposal		Acquisition within distributable profits (Direct holding)		Common shares		Enhancement of shareholder value (partial cancellation of shares)		Other		107,194		0.05		Exercise of stock options and compensation for officers and employees
Cancellation		—		—		—		—		—		—		—
Retention		Acquisition within distributable profits (Direct holding)		Common shares		Enhancement of shareholder value (partial cancellation of shares)		Other		99,272		0.05		Compensation for officers and employees
		Acquisition within distributable profits (Direct holding)		Common shares		Enhancement of shareholder value (partial cancellation of shares)		Cancellation of repurchased shares		1,601,312		0.75		Enhancement of shareholder value

H.	Status of Implementation of Short-Term Plan for Acquisition, Disposal and Cancellation of Treasury Shares

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

I.	Long-Term Plan for Acquisition, Disposal and Cancellation of Treasury Shares

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.

J.	Other Matters Necessary for Investor Protection

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

Date of Revision		General Meeting of Shareholders		Key Revisions		Reason for Revisions
March 26, 2024		40th General Meeting of Shareholders		Board meeting notice period, year-end dividend record date		To strengthen the Board’s deliberation function by providing sufficient time for advance review and to enhance shareholders’ ability to estimate future dividends
March 26, 2025		41st General Meeting of Shareholders		Quarterly dividend record date		To enhance shareholders’ ability to estimate future dividends
March 26, 2026		42nd General Meeting of Shareholders		Title of independent directors, basis for the number of Audit Committee members subject to separate election		To reflect amendments to the Korean Commercial Code and revise existing language

11

II.

BUSINESS

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.

Classification		Company Name		Description of Business
Wireless		SK Telecom		Wireless voice and data telecommunications services via digital wireless networks
		PS&Marketing		Sale of fixed-line and wireless telecommunications products through wholesale, retail and online distribution channels
		SK O&S		Maintenance of base stations
Fixed-line		SK Broadband		High-speed Internet, TV, telephone, commercial data and other fixed-line services and management of the transmission system for online digital contents Various media-related services, such as channel management services including video-on-demand services
		Home&Service		System maintenance of high-speed Internet, Internet protocol TV (“IPTV”) and fixed-line services
		SK Telink		International wireless direct-dial “00700” services and mobile virtual network operator (“MVNO”) business
Other business		SK Stoa		Operation of commercial retail data broadcasting channel services
		Atlas Investment		Investments
		SK Telecom Innovation Fund, L.P.		Investments
		SAPEON Inc.		Manufacture of non-memory and other electronic integrated circuits
		Astra AI Infra LLC		Investments
		SK Telecom Americas, Inc.		Information collection and consulting services
		Global AI Platform Corporation		Software development and supply

[Wireless Business]

A.

Overview

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.

12

B.	Industry Characteristics

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.

C.	Growth Potential

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, the ultra-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.

(Unit: in 1,000 persons)
Classification				As of June 30, 2026		As of December 31,
						2025		2024
Number of Subscribers		SK Telecom		30,937		30,853		31,786
		Others (KT, LG U+)		41,888		41,466		38,360
		MVNO		20,577		19,885		17,825
		Total		93,402		92,203		87,971

*	Source: Wireless telecommunications service data from the Ministry of Science and ICT (“MSIT”) as of May 31, 2026.

D.	Domestic and Overseas Market Conditions

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

13

(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).

						(Unit: in percentages)
Classification		As of June 30, 2026				As of December 31,
						2025				2024
Mobile communication services			42.5				42.7				45.3

*	Source: Wireless telecommunications service data from the MSIT as of May 31, 2026.

[Fixed-line Business]

A.

Overview

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.

B.	Industry Characteristics

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/or e-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.

14

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 and set-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.

C.	Growth Potential

(Unit: in persons)

Classification				As of June 30, 2026***				As of December 31,
								2025				2024
Fixed-line Subscribers*		High-speed Internet			25,417,529				25,233,811				24,721,782
		Fixed-line telephone (including Voice over Internet Protocol (“VoIP”))**			17,290,006				17,581,886				18,347,951
		IPTV			21,310,250				21,310,250				21,190,908
		Cable TV			12,273,098				12,273,098				12,342,797

*	Source: MSIT website.

**	With respect to fixed-line telephone, the number of subscribers was calculated based on the number of fixed-line and VoIP subscribers of the Company, KT and LG U+.

***	High-speed Internet and fixed-line telephone subscribers represent the number of subscribers as of April 30, 2026, while IPTV and cable TV subscribers represent the average number of subscribers in the second half of 2024.

D.	Cyclical Nature and Seasonality

There is little difference among the services provided by operators of high-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.

E.	Domestic and Overseas Market Conditions

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

(Unit: in percentages)

Classification		As of June 30, 2026***				As of December 31,
						2025				2024
High-speed Internet (including resales)*			28.8				28.7				28.9
Fixed-line telephone (including VoIP)*			18.7	**			18.6				18.3
IPTV*			31.8				31.8				31.9
Cable TV*			22.9				22.9				22.8

15

*	Source: MSIT website.

**	With respect to fixed-line telephone, the market share was calculated based on market shares among SK Broadband, KT and LG U+ and is based on the number of fixed-line and VoIP subscribers.

***	Market shares for the high-speed Internet and fixed-line telephone markets are based on the market shares as of April 30, 2026, and market shares for the IPTV and cable TV markets are based on the average number of subscribers in the second half of 2024.

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]

A.	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

A.

Assets

						(Unit: in millions of Won and percentages)
Classification		As of June 30, 2026								As of December 31,
										2025								2024
		Amount				Ratio				Amount				Ratio				Amount				Ratio
Wireless			27,140,476				74	%			25,731,253				75	%			25,154,898				75	%
Fixed-line			7,693,677				21	%			7,158,666				21	%			7,174,920				21	%
Other			1,732,400				5	%			1,392,466				4	%			1,276,546				4	%
Subtotal			36,566,553				100	%			34,282,385				100	%			33,606,364				100	%
Consolidation Adjustment			(4,136,402	)			—				(4,174,602	)			—				(3,091,111	)			—
Total			32,430,151				—				30,107,783				—				30,515,254				—

B.

Revenue

						(Unit: in millions of Won and percentages)
Classification		For the six months ended June 30, 2026								For the year ended December 31,
										2025								2024
		Amount				Ratio				Amount				Ratio				Amount				Ratio
Wireless			6,497,465				74	%			12,552,543				73	%			13,318,213				74	%
Fixed-line			2,106,992				24	%			4,191,113				25	%			4,075,412				23	%
Other			146,912				2	%			355,557				2	%			546,984				3	%
Total			8,751,369				100	%			17,099,213				100	%			17,940,609				100	%

C.	Operating Profit

						(Unit: in millions of Won and percentages)
Classification		For the six months ended June 30, 2026								For the year ended December 31,
										2025								2024
		Amount				Ratio				Amount				Ratio				Amount				Ratio
Wireless			847,784				77	%			817,941				75	%			1,529,971				84	%
Fixed-line			253,686				23	%			308,372				28	%			366,517				20	%
Other			5,188				—				(30,511	)			(3	)%			(64,929	)			(4	)%
Subtotal			1,106,658				100	%			1,095,762				100	%			1,831,559				100	%
Consolidation Adjustment			(3,024	)			—				(22,547	)			—				(8,150	)			—
Total			1,103,634				—				1,073,215				—				1,823,409				—

16

3. Updates on Major Products and Services

								(Unit: in millions of Won and percentages)
Business		Major Companies		Items		Major Trademarks		For the six months ended June 30, 2026								For the year ended December 31,
																2025								2024
								Consolidated Sales Amount				Ratio				Consolidated Sales Amount				Ratio				Consolidated Sales Amount				Ratio
Wireless		SK Telecom, PS&Marketing, SK O&S, etc.		Mobile communications service, wireless data service, ICT service and others		T, 5GX, T Plan and others			6,497,465				74	%			12,552,543				73	%			13,318,213				74	%
Fixed-line		SK Broadband, SK Telink, Home&Service, etc.		Fixed-line phone, high-speed Internet, data and network lease service and others		B tv, 00700 international call, 7mobile and others			2,106,992				24	%			4,191,113				25	%			4,075,412				23	%
Other		SK Stoa, etc.		Commercial retail data broadcasting channel service and others		Stoa ON			146,912				2	%			355,557				2	%			546,984				3	%
Total									8,751,369				100	%			17,099,213				100	%			17,940,609				100	%

4. Price Trends for Major Products

[Wireless Business]

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.

[Fixed-line Business]

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

-

IPTV (media business segment): from Won 11,000 (B tv Mini) to Won 50,600 (B tv All + Catch On + major networks) under no fixed-term contract

17

-

Cable TV (based on Suwon broadcasting) direct cable TV: from Won 4,400 or less (B tv Cable 20) to Won 16,500 or less (B tv Cable 90) under no fixed-term contract, and from Won 3,520 or less (B tv Cable 20) to Won 13,200 (B tv Cable 90) under a three-year contract

-

Digital cable TV: from Won 13,200 or less (B tv Cable 100) to Won 26,400 (B tv Cable 200) under no fixed-term contract, and from Won 10,560 (B tv Cable 100) to Won 21,120 (B tv Cable 200) under a three-year contract

-

Technology-neutral service: from Won 13,200 (B tv Pop 100) to Won 33,990 (B tv Pop 230+) under no fixed-term contract, and from Won 7,700 (B tv Pop 100) to Won 20,900 (B tv Pop 230+) under a three-year contract

-

High-speed Internet service (fixed-line business segment): from Won 30,800 (Speed Internet) to Won 104,500 (Giga Premium×10) under no fixed-term contract, and from Won 22,000 (Speed Internet) to Won 82,500 (Giga Premium×10) under a three-year contract

-

Bundled products that combine high-speed Internet and IPTV services: from Won 33,000 (Speed Internet + B tv Economy) to Won 111,100 (Giga Premium×10 + B tv All + Catch On + major networks) under a three-year contract

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 features on-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 an ultra-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

[Wireless Business]

A.	Investment in Progress and Future Investment Plan

(Unit: in billions of Won)

Purpose of Investment

Subject of Investment

Investment Period

Expected Investment Amount

Amount Already Invested

Investment Effect

Upgrade/New installation

Network, systems and others

Six months ended June 30, 2026

To be determined

254

Upgrades to the existing services and expanded provision of network services including 5G

18

[Fixed-line Business]

A.	Investment in Progress and Future Investment Plan

(Unit: in billions of Won)

Purpose of Investment

Subject of Investment

Investment Period

Amount already Invested*

Future Investment

Investment Effect

Coverage expansion, upgrade of media platform

Network, systems, Internet data center and others

Six months ended June 30, 2026

370

To be determined

Securing subscriber network and equipment; quality and system improvement

*	Represents investments by SK Broadband on a separate basis.

6. Revenues

(Unit: in millions of Won)

Business		Sales Type		Item				For the six months ended June 30, 2026				For the year ended December 31, 2025				For the year ended December 31, 2024
Wireless		Services		Mobile communication, wireless data, information communication		Export			93,846				196,249				212,235
						Domestic			6,403,619				12,356,294				13,105,978
						Subtotal			6,497,465				12,552,543				13,318,213
Fixed-line		Services		Fixed-line, high-speed Internet, data, lease line service		Export			97,850				205,494				213,815
						Domestic			2,009,142				3,985,619				3,861,597
						Subtotal			2,106,992				4,191,113				4,075,412
Other		Services		Commercial retail data broadcasting channel services		Export			—				—				—
						Domestic			146,912				355,557				546,984
						Subtotal			146,912				355,557				546,984
Total						Export			191,696				401,744				426,050
						Domestic			8,559,673				16,697,469				17,514,559
						Total			8,751,369				17,099,213				17,940,609

(Unit: in millions of Won)

For the six months ended June 30, 2026		Wireless				Fixed-line				Other				Subtotal				Consolidation Adjustment				After Consolidation
Total sales			7,219,471				2,722,416				153,127				10,095,014				(1,343,645	)			8,751,369
Internal sales			722,006				615,424				6,215				1,343,645				(1,343,645	)			—
External sales			6,497,465				2,106,992				146,912				8,751,369				—				8,751,369
Operating profit (loss)			847,784				253,686				5,188				1,106,658				(3,024	)			1,103,634
Finance profit (loss)																							(119,075	)
Loss from investments in associates and joint ventures																							(31,815	)
Other non-operating profit (loss)																							21,184
Profit before income tax																							1,037,558

7. Derivative Transactions

A.	Current Swap Contract Applying Cash Flow Risk Hedge Accounting

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

[SK Telecom]

Borrowing Date		Hedged Item		Hedged Risk		Contract Type		Financial Institution		Duration of Contract
July 20, 2007		Fixed rate foreign currency denominated bonds (face value of US$400,000,000)		Foreign currency risk		Cross currency swap		Morgan Stanley and four other banks		July 20, 2007 – July 20, 2027
June 28, 2023		Fixed rate foreign currency denominated bonds (face value of US$300,000,000)		Foreign currency risk		Cross currency swap		Citibank, Shinhan Bank, KDB, J.P. Morgan		June 28, 2023 – June 28, 2028
October 7, 2024		Floating rate Won denominated borrowings (face value of Won 200 billion)		Interest rate risk		Interest rate swap		DBS Bank Ltd.		October 10, 2024 – October 8, 2026
May 28, 2025		Floating rate foreign currency denominated bonds (face value of US$300,000,000)		Foreign currency risk and interest rate risk		Cross currency interest rate swap		DBS Bank Ltd.		May 28, 2025 – May 26, 2028

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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)

Category				For the six months ended June 30, 2026				For the year ended December 31, 2025				For the year ended December 31, 2024				Remarks
Raw material					6				27				492				—
Labor					60,682				116,856				134,508				—
Depreciation					68,073				123,083				134,989				—
Commissioned service					16,963				49,033				61,588				—
Others					41,063				66,773				61,267				—
Total R&D costs					186,787				355,772				392,844				—
Government Subsidies					—				—				—				—
Accounting		Sales and administrative expenses			182,502				338,841				378,079				—
		Development costs (Intangible assets)			4,285				16,931				14,765				—
R&D cost / sales amount ratio (Total R&D costs / Current sales amount×100)					2.13	%			2.08	%			2.19	%			—

10. Other Information Relating to Investment Decisions

A.	Brand Management Policies

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.

B.	Business-related Intellectual Property

[SK Telecom]

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.

[SK Broadband]

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.

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C.	Business-related Pollutants and Environmental Protection

[SK Telecom]

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]

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.

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III.	FINANCIAL INFORMATION

1. Summary Financial Information (Consolidated and Separate)

A.	Summary Financial Information (Consolidated)

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.

(Unit: in millions of Won)
		As of June 30, 2026				As of December 31, 2025				As of December 31, 2024
Assets
Current Assets			7,292,630				6,727,130				7,476,682
• Cash and Cash Equivalents			1,203,896				1,490,024				2,023,721
• Short-Term Financial Instruments			799,534				151,426				323,890
• Short-Term Investment Securities			33,102				35,217				—
• Accounts Receivable – Trade, net			2,025,065				1,918,502				1,989,306
• Short-Term Loans, net			80,335				69,664				65,205
• Accounts Receivable – Other, net			321,287				346,326				369,192
• Contract Assets			154,188				124,831				90,385
• Accrued Income			2,942				1,998				4,242
• Advance Payments			21,512				26,064				38,656
• Prepaid Expenses			2,237,177				2,135,763				1,945,610
• Prepaid Income Taxes			929				6,217				21
• Derivative Financial Assets			7,043				6,945				119,500
• Inventories, net			149,132				167,640				209,783
• Assets Held for Sale			156,636				143,489				174,839
• Others			99,852				103,024				122,332
Non-Current Assets			25,137,521				23,380,653				23,038,573
• Long – Term Financial Instruments			3,458				370				373
• Long-Term Investment Securities			5,847,279				3,188,572				1,877,922
• Investments in Associates and Joint Ventures			2,356,277				2,238,470				2,341,827
• Investment Property, net			25,875				39,841				26,611
• Property and Equipment, net			11,221,896				11,902,173				12,617,394
• Goodwill			2,072,493				2,072,493				2,072,493
• Intangible Assets, net			1,370,218				1,710,620				2,194,871
• Long-Term Contract Assets			65,133				63,778				46,352
• Long-Term Loans, net			32,330				32,184				34,446
• Long-Term Accounts Receivable – Other, net			171,355				164,762				173,252
• Long-Term Prepaid Expenses			1,271,428				1,280,751				1,108,406
• Guarantee Deposits, net			156,310				167,823				155,875
• Long-Term Derivative Financial Assets			413,363				303,201				221,608
• Defined Benefit Assets			119,152				205,477				154,329
• Others			10,954				10,138				12,814
Total Assets			32,430,151				30,107,783				30,515,255

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(Unit: in millions of Won)
		As of June 30, 2026				As of December 31, 2025				As of December 31, 2024
Liabilities
Current Liabilities			5,847,626				6,529,775				9,224,278
• Accounts Payable – Trade, net			117,593				110,867				126,508
• Other Payables			1,087,940				1,576,870				2,798,978
• Deposits Withheld			1,077,112				1,011,918				928,679
• Contract Liabilities			161,423				207,682				168,194
• Accrued Expenses			1,274,115				1,345,998				1,522,750
• Current Income Tax Liabilities			245,869				28,482				243,564
• Derivative Financial Liabilities – Current			6,281				5,782				—
• Current Provisions			154,590				145,953				50,016
• Short-Term Borrowings			130,000				130,000				100,000
• Current Portion of Bonds and Long-Term Borrowings			1,060,277				1,122,584				2,460,109
• Current Portion of Long-Term Payables – Other			90,500				368,572				367,765
• Lease Liabilities			387,909				407,959				351,363
• Liabilities Held for Sale			54,017				67,108				106,352
Non-Current Liabilities			11,087,526				10,622,716				9,463,343
• Bonds, excluding current portion			7,282,641				7,294,445				6,363,646
• Long-Term Borrowings, excluding current portion			300,000				300,000				203,125
• Long-Term Payables – Other, excluding current portion			90,103				179,389				539,955
• Long-Term Accrued Expenses			495				279				271
• Long-Term Lease Liabilities			988,324				1,117,839				1,286,588
• Long-Term Contract Liabilities			275,759				194,261				61,512
• Defined Benefit Liabilities			—				—				2,086
• Derivative Financial Liabilities – Non-Current			—				621				3,437
• Non-Current Provisions			74,823				80,094				70,044
• Deferred Income Tax Liabilities			1,976,720				1,363,191				851,200
• Others			98,661				92,597				81,479
Total Liabilities			16,935,152				17,152,491				18,687,621
Shareholders’ Equity
Equity Attributable to Owners of the Parent Company			15,436,629				12,863,103				11,698,627
Share Capital			30,493				30,493				30,493
Capital Surplus and Others			(13,859,497	)			(12,131,340	)			(11,954,936	)
Retained Earnings			25,220,392				22,938,268				22,976,127
Reserves			4,045,241				2,025,682				646,943
Non-Controlling Interests			58,370				92,189				129,007
Total Shareholders’ Equity			15,494,999				12,955,292				11,827,634
Total Liabilities and Shareholders’ Equity			32,430,151				30,107,783				30,515,255

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(Unit: in millions of Won except per share data and number of consolidated subsidiaries)
		For the six months ended June 30, 2026				For the year ended December 31, 2025				For the year ended December 31, 2024
Operating Revenue			8,751,369				17,099,213				17,940,609
Operating Profit			1,103,634				1,073,215				1,823,409
Profit Before Income Tax			1,037,558				722,261				1,761,765
Profit for the Period			782,395				375,084				1,387,095
Profit for the Period Attributable to Owners of the Parent Company			793,012				408,410				1,250,155
Profit for the Period Attributable to Non-Controlling Interests			(10,617	)			(33,326	)			136,940
Basic Earnings Per Share (Won)			3,676				1,825				5,780
Diluted Earnings Per Share (Won)			3,676				1,825				5,765
Total Number of Consolidated Subsidiaries			18				19				21

B.	Summary Financial Information (Separate)

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)

		As of June 30, 2026				As of December 31, 2025				As of December 31, 2024
Assets
Current Assets			4,988,608				4,932,557				5,242,405
• Cash and Cash Equivalents			575,767				771,861				1,165,158
• Accounts Receivable – Trade, net			1,545,489				1,469,426				1,508,893
• Accounts Receivable – Other, net			447,728				393,136				390,243
• Others			2,419,624				2,298,134				2,178,111
Non-Current Assets			21,542,038				20,216,179				19,343,221
• Long-Term Investment Securities			4,678,787				2,396,996				1,418,465
• Investments in Subsidiaries and Associates			5,933,569				5,892,726				4,899,558
• Property and Equipment, net			6,988,071				7,680,504				8,515,225
• Goodwill			1,306,236				1,306,236				1,306,236
• Intangible Assets, net			934,737				1,230,202				1,683,018
• Others			1,700,638				1,709,515				1,520,719
Total Assets			26,530,646				25,148,736				24,585,626
Liabilities
Current Liabilities			4,354,755				5,070,242				6,240,886
Non-Current Liabilities			8,170,654				8,087,444				7,383,886
Total Liabilities			12,525,409				13,157,686				13,624,772
Equity
Share Capital			30,493				30,493				30,493
Capital Surplus (Deficit) and Other Capital Adjustments			(6,251,547	)			(4,547,673	)			(4,551,820	)
Retained Earnings			17,336,199				15,199,915				15,273,451
Reserves			2,890,092				1,308,315				208,730
Total Equity			14,005,237				11,991,050				10,960,854
Total Liabilities and Equity			26,530,646				25,148,736				24,585,626

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