[6-K] SK TELECOM CO LTD Current Report (Foreign Issuer)

Rhea-AI Filing Summary

SK Telecom reported preliminary Q3 2025 results that show weaker performance on both a consolidated and separate basis, and the figures may change after audit. On a consolidated basis, operating revenue was 39,781 (unit: 100 millions of Won), down 8.31% from the prior quarter and 12.23% year over year. Operating income was 484, a sharp decline from 3,383 in Q2 (down 85.68%) and 5,333 a year ago (down 90.92%). The period result swung to a loss of 1,667 versus a profit of 832 in Q2. Year-to-date, operating revenue was 127,705 and operating income was 9,541.

On a separate basis, operating revenue was 26,647, down 15.00% quarter over quarter and 16.81% year over year. Operating income turned to a loss of 522 from a profit of 2,509 in Q2, and the period result was a loss of 2,066. Year-to-date, separate operating revenue was 89,673 and operating income was 6,811. Management provided these preliminary figures for the Q3 2025 earnings results conference call and noted they are prepared under IFRS as adopted in Korea.

Insights

Telecom equity analyst

Preliminary Q3 shows broad profit pressure and a swing to losses.

SK Telecom lists Q3 consolidated operating revenue of 39,781 (unit: 100 millions of Won) with operating income of 484, down 85.68% quarter over quarter. The quarter moved to a consolidated period loss of 1,667, indicating significant margin compression versus Q2.

Separate results also weakened: operating revenue 26,647 and operating income at a loss of 522. Year-to-date consolidated operating income of 9,541 trails the prior year, reflecting sustained pressure through September 30, 2025.

These figures are preliminary and subject to audit. The scale of the operating income drop and the losses point to weaker fundamentals this quarter; actual impact will depend on final audited results and any management commentary in subsequent disclosures.

UNITED STATES

SECURITIES AND EXCHANGE COMMISSION

Washington, D.C. 20549

Form 6-K

REPORT OF FOREIGN PRIVATE ISSUER

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

OF THE SECURITIES EXCHANGE ACT OF 1934

FOR THE MONTH OF OCTOBER 2025

Commission File Number: 333-04906

SK Telecom Co., Ltd.

(Translation of registrant’s name into English)

65, Euljiro, Jung-gu

Seoul 04539, Korea

(Address of principal executive office)

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

Form 20-F ☒    Form 40-F ☐

Preliminary Results of Operations

• The preliminary results shown below may differ from the final results. 

1. Basis: Consolidated 

Classification (unit : in 100 millions of Won, %)				Current Period (Third quarter(1) of 2025)				Previous Period (Second quarter(2) of 2025)				Changes (%)				Year to Year Comparison (Third quarter(1) of 2024)				Changes (%)
Operating Revenue		Quarterly Results			39,781				43,388				(8.31)				45,321				(12.23)
		Year-to-date (“YTD”)(3) Results			127,705				—				—				134,291				(4.90)
Operating Income		Quarterly Results			484				3,383				(85.68)				5,333				(90.92)
		YTD(3) Results			9,541				—				—				15,693				(39.20)
Profit (Loss) from Continuing Operations Before Income Tax		Quarterly Results			(1,639)				2,404				N.A*				3,647				N.A*
		YTD(3) Results			5,844				—				—				12,836				(54.47)
Profit (Loss) for the Period		Quarterly Results			(1,667)				832				N.A*				2,802				N.A*
		YTD(3) Results			2,781				—				—				9,923				(71.97)
Attributable To: Controlling Interests		Quarterly Results			(1,582)				896				N.A*				2,689				N.A*
		YTD(3) Results			2,959				—				—				9,593				(69.16)

(1) Refers to the three-month period from July 1 to September 30 of a given year.

(2) Refers to the three-month period from April 1 to June 30 of a given year.

(3) Refers to the nine-month period from January 1 to September 30 of a given year.

* Means “not applicable.”

2. Basis: Separate 

Classification (unit : in 100 millions of Won, %)				Current Period (Third quarter(1) of 2025)				Previous Period (Second quarter(2) of 2025)				Changes (%)				Year to Year Comparison (Third quarter(1) of 2024)				Changes (%)
Operating Revenue		Quarterly Results			26,647				31,351				(15.00)				32,032				(16.81)
		YTD(3) Results			89,673				—				—				95,834				(6.43)
Operating Income (Loss)		Quarterly Results			(522)				2,509				N.A*				4,570				N.A*
		YTD(3) Results			6,811				—				—				13,438				(49.32)
Profit (Loss) Before Income Tax		Quarterly Results			(2,305)				1,950				N.A*				2,918				N.A*
		YTD(3) Results			5,655				—				—				12,443				(54.55)
Profit (Loss) for the Period		Quarterly Results			(2,066)				369				N.A*				2,224				N.A*
		YTD(3) Results			3,048				—				—				9,948				(69.36)

(1) Refers to the three-month period from July 1 to September 30 of a given year.

(2) Refers to the three-month period from April 1 to June 30 of a given year.

(3) Refers to the nine-month period from January 1 to September 30 of a given year.

* Means “not applicable.”

3. Source of Data		Data Provider		IR, SK Telecom
		Provided for		Analysts and Investors
		Date of Provision		October 30, 2025 / 10:00 a.m. (Seoul time)
		Location		2025 3Q Earnings Results Conference Call
		Organizing Team		IR, SK Telecom (+82-2-6100-2114)
4. Other Important Matters Relating to an Investment Decision		-  The preliminary results set forth in this report have been prepared on a consolidated basis and separate basis in accordance with International Financial Reporting Standards as adopted in Korea and may be subject to change based on the results of the audit by the Company’s external auditor. - For further relevant materials, please refer to the Company’s IR website at: https://www.sktelecom.com/en/investor/lib/announce.do

SIGNATURES

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

SK TELECOM CO., LTD.
(Registrant)
By:		/s/ Hee Jun Chung
(Signature)
Name:		Hee Jun Chung
Title:		Vice President

Date: October 30, 2025