Material event report (treasury share disposal) (subsidiary)

What happened

Material event report / Korea Exchange disclosure obligation: material management matter report of subsidiary SK Telecom Co., Ltd. To: Financial Services Commission / Korea Exchange Date: August 27, 2026 Company name: SK Telecom Co., Ltd. Representative director: Jeong Jae-heon Head office: 65 Eulji-ro, Jung-gu, Seoul (Tel) 02-6100-2114 (Website) https://www.sktelecom.com Preparer: (Title) Head of Corporate Center (CFO) (Name) Park Jong-seok (Tel) 02-6100-2114

Treasury share disposal decision

1. Shares to be disposed: common shares 1,061; other-class shares - 2. Price per share to be disposed (KRW): common shares 99,600; other-class shares - 3. Expected disposal amount (KRW): common shares 105,675,600; other-class shares - 4. Expected disposal period: start 2026.08.28, end 2026.09.30 5. Purpose of disposal: treasury-share compensation payment 6. Method of disposal: pro-rata to shareholders -; off-hours block trade -; over-the-counter disposal: 1,061 shares; other - 7. Disposal counterparty: 5 independent directors 8. Entrusted investment broker: SK Securities Co., Ltd. 9. Treasury shares held before disposal: acquired within distributable profit - common shares 1,732,142 (ratio 0.8%); other-class -; other acquisition - common shares -, other-class - 10. Holding/disposal plan: approved at the shareholders' meeting on 2026.03.26 11. Disposal decision date: 2026.08.27 (independent/outside directors present: 5, absent: 0; audit committee (non-outside-director auditor) attendance: -) 12. Daily sell-order quantity limit: common shares -; other-class -

13. Other material matters relevant to investment decisions - Items 1-3 above are based on the closing price on the day before the board resolution (August 26, 2026). - The actual number of shares, price and amount disposed may change as of the actual disposal date. - The purpose in Item 5 is to pay a total of 1,061 shares to five independent directors under a value-linked independent-director compensation program, paying part of their remuneration in treasury shares of equivalent value; the number of shares per individual varies by role. - The method in Item 6 is a transfer from the company's treasury-share account to each independent director's account.

[Treasury shares held before the disposal decision] (unit: shares) Acquired within distributable profit, trust-contract acquisition held in kind: common shares - opening balance 1,807,778, acquired(+) -, disposed(-) 75,636, retired(-) -, closing balance 1,732,142; other-class shares - all - Subtotal (b): common shares 1,807,778 / - / 75,636 / - / 1,732,142; other-class - All other acquisition categories (direct on-market, direct off-market, tender offer, subtotal (a), trustee-held trust contract, other acquisition (c)): common shares and other-class shares all - Total (a+b+c): common shares 1,807,778 / - / 75,636 / - / 1,732,142; other-class - - "Opening balance" is as of the start of the fiscal year (January 1, 2026); "closing balance" is as of the filing date (August 27, 2026).

[Additional disclosure] 1. Relationship of each disposal counterparty to the company/largest shareholder: 5 independent directors 2. Reason for selecting the counterparty: treasury-share payment under the independent-director compensation program 3. Shares disposed per counterparty (shares): common shares 1,061 4. Basis for pricing: Items 1-3 above are based on the closing price on the day before the board resolution (August 26, 2026). 5. Expected dilutive effect: Item 1 (shares to be disposed) is about 0.0005% of total shares outstanding (214,790,053 common shares), so the dilutive effect is expected to be minimal. 6. Other material matters relevant to investment decisions: -