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 OF

THE SECURITIES EXCHANGE ACT OF 1934

FOR THE MONTH OF MARCH 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 ☐

RESULTS OF THE ANNUAL GENERAL MEETING OF SHAREHOLDERS

1. Approval of Financial Statements for the 42nd Fiscal Year (2025): approved as originally submitted (with [70.9]% of issued and outstanding shares withvoting rights (or [96.5]% of such shares that actually exercised voting power) voting in favor)

2. Amendments to the Articles of Incorporation: approved as originally submitted (with [73.4]% of issued and outstandingshares with voting rights (or [99.9]% of such shares that actually exercised voting power) voting in favor)

3. Approval of Reduction of CapitalReserve: approved as originally submitted (with [73.4]% of issued and outstanding shares with voting rights (or [99.9]% of such shares that actually exercised voting power) voting in favor)

4-1. Appointment of an Executive Director (Jung, Jaihun):approved as originally submitted (with [73.3]% of issued and outstanding shares with voting rights (or [99.8]% of such shares that actually exercised voting power) voting in favor)

4-2. Appointment of an Executive Director (Han, Myung Jin): approved as originallysubmitted (with [72.1]% of issued and outstanding shares with voting rights (or [98.1]% of such shares that actually exercised voting power) voting in favor)

4-3. Appointment of a Non-executiveDirector (Yoon, Poong Young): approved as originally submitted (with [73.1]% of issued and outstanding shares with voting rights (or [99.5]% of such shares that actually exercised voting power) voting in favor)

4-4. Appointment of an IndependentNon-executive Director (Oh, Alice Haeyun): approved as originally submitted (with [71.3]% of issued and outstanding shares with voting rights (or [97.1]% of such shares that actually exercised voting power)voting in favor)

4-5. Appointment of an IndependentNon-executive Director (Lee, Seong Yeob): approved as originally submitted (with [73.3]% of issued and outstanding shares with voting rights (or [99.8]% of such shares that actually exercised voting power)voting in favor)

5. Appointment of an Independent Non-executive Director and AuditCommittee Member (Lim, Tay Seop): approved as originally submitted (with [61.0]% of issued and outstanding shares with voting rights (or [99.6]% of such shares that actually exercised voting power) voting in favor)

6. Appointment of an Audit Committee Member (Lee, Seong Yeob): approved as originally submitted (with [99.6]% of issued andoutstanding shares with voting rights (or [61.0]% of such shares that actually exercised voting power) voting in favor)

7. Approval of the Ceiling Amount of Remuneration for Directors: approved as originally submitted (with[73.2]% of issued and outstanding shares with voting rights (or [99.6]% of such shares that actually exercised voting power) voting in favor)

8.Approval of the Plan for Holding and Disposal of Treasury Shares: approved as originally submitted (with [72.2]% of issued and outstanding shares with voting rights (or [98.3]% of such shares that actually exercised voting power) voting in favor)

Related disclosure: see Current Report titled “Resolution to Call the Annual General Meeting of Shareholders” furnished by theregistrant on Form 6-K dated February 25, 2026 and Amendment No. 1 to Current Report titled “Amendment Regarding Resolution to Call the Annual General Meeting of Shareholders” furnishedby the registrant on Form 6-K/A dated March 5, 2026.

SIGNATURE

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.

Date: March 26, 2026