Director's Report on Ownership of Specific Securities

Report on Ownership of Specific Securities by Officers and Major Shareholders 6.1 SK Hynix Co., Ltd. 2026-05-04 Report on Ownership of Specific Securities by Officers and Major Shareholders To: Securities and Futures Commission To: Korea Exchange Date of Reporting Obligation: May 4, 2026 Report Reference Date: May 6, 2026 *The reporter hereby confirms that, as of the report reference date, he has accurately prepared the ownership status of his specific securities in accordance with relevant laws and instructions, and that there is no false statement or omission of material information. Reporter: Sohn Hyun Chul 1. Information on the Issuing Company - Company Name: SK Hynix Co., Ltd. - Corporate Classification: KOSPI-listed corporation - Company Code: 000660 - Total Issued Shares: 712,702,365 2. Information on the Reporter - Report Classification: Change - Reporter Classification: Individual (Domestic) - Name (Korean): Sohn Hyun Chul - Name (English): Sohn Hyun Chul - Date of Birth: March 18, 1961 - Address: Hakdong-ro, Gangnam-gu, Seoul - Relationship with Issuer: Officer (Registered) - Position: Outside Director - Appointment Date: March 27, 2024 - Retirement Date: - - Major Shareholder: - Business Contact: - Affiliated Company: SK Hynix Co., Ltd. - Department: IR - Position: TL - Phone: 031-80******* - Contact Name: Choi Seo-yoon - Fax: 031-8093-4578 - Email: ******n.choi@sk.com 3. Ownership Status of Specific Securities A. Number and Ownership Ratio of Specific Securities Held Previous Report (April 25, 2025): - Specific Securities: 572 shares (0.00%) - Common Shares: 572 shares (0.00%) Current Report (May 6, 2026): - Specific Securities: 612 shares (0.00%) - Common Shares: 612 shares (0.00%) Change: +40 shares (0.00%) B. Ownership Details by Type of Specific Securities - Common Shares: 612 - Warrant Certificates: - - Convertible Bonds: - - Bonds with Warrants: - - Profit-Participating Bonds: - - Exchangeable Bonds: - - Depositary Receipts: - - Other: - - Total: 612 shares (0.00%) Total Issued Shares (J): 712,702,365 Number of Non-Stock Specific Securities (B+C+D+E+F+G+H=I): 0 Ownership Ratio (%): 0.00 Ownership Ratio of Specific Securities [(A+I) / (J+I-(F+G+H))] × 100: 0.00 Ownership Ratio of Common Shares (A/J) × 100: 0.00 *The denominator excludes exchangeable bonds whose underlying is stock, and depositary receipts/derivative-linked securities based on stock. C. Detailed Changes Reason for Change: Treasury Share Bonus (+) Date of Change: May 4, 2026 Type of Specific Security: Common Shares - Pre-change holdings: 572 - Change: +40 - Post-change holdings: 612 - Acquisition/Disposal Unit Price (KRW): - - Note: - - Trading Plan Report Date: - Total: 572 → 612 (+40) * For securities traded on the stock exchange, the contractual settlement date. ** For non-stock securities, this refers to the exercise (conversion/exchange) price or the trading unit price of shares acquired/disposed through the exercise of rights; amounts in parentheses indicate the trading unit price of the relevant security.