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 ~~May~~MAY 2026

Commission File Number: 333-04906

SK Telecom Co., Ltd.

(Translation of registrant’s name into English)

65, Euljiro, Jung-gu

Seoul 04539, Korea

(Address of principal executive office)

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

Form 20-F ☒ Form 40-F ☐

~~Preliminary~~Report ~~Results~~on Disposal of ~~Operations~~Treasury Shares

•From ~~The~~April 28, ~~preliminary~~2026 ~~results~~to ~~shown~~May 13, ~~below~~2026, ~~may~~SK ~~differ~~Telecom ~~from~~Co., Ltd. (the ~~final~~“Company”) ~~results~~disposed of a portion of its treasury shares.

1. ~~Basis:~~Report ~~Consolidated~~on Disposal

Classification (unit : in 100 millions of Won, %)		Current Period(First quarter(1)of 2026)		Previous Period(Fourthquarter(2)of 2025)			Changes(%)			Year to YearComparison(First quarter(1)of 2025)		Changes(%)
Operating Revenue	Quarterly Results		43,923		43,287			1.47			44,537		(1.38)
	Year-to- date (“YTD”)(3) Results		43,923		N.A	*		N.A	*		44,537		(1.38)
Operating Income	Quarterly Results		5,376		1,191			351.25			5,674		(5.25)
	YTD(3) Results		5,376		N.A	*		N.A	*		5,674		(5.25)
Profit (Loss) from Continuing Operations Before Income Tax	Quarterly Results		4,656		1,378			237.75			5,079		(8.33)
	YTD(3) Results		4,656		N.A	*		N.A	*		5,079		(8.33)
Profit (Loss) for the Period	Quarterly Results		3,164		970			226.22			3,616		(12.49)
	YTD(3) Results		3,164		N.A	*		N.A	*		3,616		(12.49)
Attributable To: Controlling Interests	Quarterly Results		3,224		1,125			186.44			3,644		(11.53)
	YTD(3) Results		3,224		N.A	*		N.A	*		3,644		(11.53)

Date of the Report of Decision on Disposal of Treasury Shares (the “Initial Report”): April 27, 2026 (Please refer to the current report on Form 6-K furnished by the Company on April 27, 2026.)

~~(1)~~B. ~~Refers~~Period toof ~~the~~Disposal: ~~three-month~~April ~~period~~28, ~~from~~2026 ~~January~~– 1May ~~to March~~ 31 of, ~~a given year.~~2026

~~(2)~~C. ~~Refers~~Type toand ~~the~~Number ~~three-month~~of ~~period~~Disposed ~~from~~Shares: ~~October~~51,952 1common ~~to December 30 of a given year.~~shares

~~(3)~~2. ~~Refers~~Details ~~to the three-month period from January 1 to March 31~~ of ~~a given year.~~Disposal

* Means “not applicable.”

Date

Type

Number

Disposal Price
per Share
(Won)⁽²⁾

Aggregate
Disposal Price
(Won)⁽²⁾

Recipient of Shares

Investment
Brokerage Agent

Order

Disposed

May 13, 2026

Common shares

49,152

105,800

5,200,281,600

Officers and employees

SK Securities Co., Ltd.

April 28, 2026

Common shares

2,800

96,800

271,040,000

Officers and employees

SK Securities Co., Ltd.

Total

51,952

—

5,471,321,600

2.※ ~~Basis:~~Based ~~Separate~~on the market closing price on the date of the disposal.

Classification (unit : in 100 millions of Won, %)		Current Period(Firstquarter(1)of 2026)		Previous Period(Fourthquarter(2)of 2025)			Changes(%)			Year to YearComparison(Firstquarter(1)of 2025)		Changes(%)
Operating Revenue	Quarterly Results		31,058		30,837			0.71			31,675		(1.95)
	YTD(3) Results		31,058		N.A	*		N.A	*		31,675		(1.95)
Operating Income (Loss)	Quarterly Results		4,095		1,308			213.20			4,824		(15.10)
	YTD(3) Results		4,095		N.A	*		N.A	*		4,824		(15.10)
Profit (Loss) Before Income Tax	Quarterly Results		4,339		1,710			153.83			6,010		(27.80)
	YTD(3) Results		4,339		N.A	*		N.A	*		6,010		(27.80)
Profit (Loss) for the Period	Quarterly Results		3,327		1,060			214.01			4,746		(29.90)
	YTD(3) Results		3,327		N.A	*		N.A	*		4,746		(29.90)

Discrepancy with the Initial Report

~~(1)~~4. ~~Refers~~Treasury toShares ~~the~~Held ~~three-month~~after ~~period~~the ~~from~~Disposal ~~January~~(as ~~1 to March 31~~ of aMay ~~given~~18, ~~year.~~2026)

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

(units: in millions of Won or percentages)

Type

Direct Acquisition (A)

Acquisition through Broker (B)

Total (A + B)

Number of
Shares

Percentage
of Total
Shares

Value

Number of
Shares

Percentage
of Total
Shares

Value

Number of
Shares

Percentage
of Total
Shares

Value

Common Shares

1,732,142

0.81

86,990

—

1,732,142

0.81

86,990

~~(3)~~※ ~~Refers~~The toabove status of treasury shares held after disposal represents the ~~three-month~~number ~~period~~of ~~from~~treasury ~~January~~shares 1held toas ~~March~~of 31May 18, 2026, reflecting the changes resulting from the Decision on Disposal of aTreasury ~~given~~Shares ~~year~~disclosed on February 4, 2026.

*SIGNATURE ~~Means “not applicable.”~~

3. Source of Data	Data Provider	IR, SK Telecom
	Provided for	Analysts and Investors
	Date of Provision	May 7, 2026 / 4:00 p.m. (Seoul time)
	Location	2026 1Q 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/ Taehee Kim
		(Signature)
Name:		Taehee Kim
Title:		Vice President

Date: May 7 18, 2026

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