Non-registered executive Kim Hyun-jung buys 31 shares on open market (May 18–Jun 1) — SK Hynix

Summary

Non-registered executive Kim Hyun-jung (IR organization, TL position) reported acquiring 31 common shares through four open-market purchases between May 18 and June 1, 2026, raising his holding from 0 to 31 shares. The trades were executed at prices ranging from KRW 1,769,000 to KRW 2,260,158 per share, with an average purchase price of approximately KRW 2,122,935. Total ownership remains effectively 0.00% of the 712,702,365 shares outstanding, so the filing has no governance or float implications. The disclosure is notable mainly as an insider-sentiment signal: an IR-side executive added to his personal stake during a period of sharply rising share prices.

Historical Impact

10 past Insider Ownership Change · ≈ Form 4 events at SK Hynix

Median +5d

+5.08%

Range

-13.16% to +23.42%

Positive outcomes

8/10

Filed	P₀	P₊₅	+5d
Jul 1, 2026	₩2,560,000	₩2,223,000	-13.16%
Jul 1, 2026	₩2,560,000	₩2,223,000	-13.16%

Full Translation

Report on Ownership of Specific Securities by Executives and Major Shareholders Version 6.1 SK hynix Inc. 2026-05-18 Report on Ownership of Specific Securities by Executives and Major Shareholders To: Securities and Futures Commission To: Korea Exchange Date reporting obligation arose: May 19, 2026 Report preparation reference date: June 9, 2026 * The reporter hereby confirms that, as of the report preparation reference date, the ownership status of his/her specific securities has been accurately prepared in accordance with the relevant laws and preparation guidelines, and that there is no false statement or omission of material matters. Reporter: Kim Hyun-jung 1. Information on the Issuing Company - Company name: SK hynix Inc. - Corporate classification: KOSPI-listed company - Company code: 000660 - Total issued shares: 712,702,365 2. Information on the Reporter - Report type: Change - Reporter classification: Individual (domestic) - Name: Kim Hyun-jung (金賢仲) - Date of birth: November 6, 1970 (701106) - Address (to dong/eup/myeon level): Daenong-ro, Heungdeok-gu, Cheongju-si, Chungcheongbuk-do - Relationship to issuer: Executive (Registered status: Non-registered executive) - Position: In charge of (Responsible for) - Appointment date: January 1, 2020 - Date of retirement: - - Major shareholder status: - - Business contact: SK hynix Inc., IR Department, Position: TL, Phone: 031-80-*******, Contact person: Choi Seo-yoon, Fax: 031-8093-4578, Email: ******n.choi@sk.com 3. Ownership of Specific Securities A. Number and ratio of specific securities owned - Previous report (Feb 3, 2025): Specific securities 0 shares (0.00%); Common shares 0 (0.00%) - This report (Jun 9, 2026): Specific securities 31 shares (0.00%); Common shares 31 (0.00%) - Change: +31 shares (+0.00%); +31 common shares (+0.00%) B. Ownership breakdown by type of specific security - Common stock (A): 31 shares - Warrants (B): - - Convertible bonds (C): - - Bonds with warrants (D): - - Profit-participating bonds (E): - - Exchangeable bonds (F): - - Depositary receipts (G): - - Other (H): - - Total (I): 31 shares (0.00%) - Total issued shares (J): 712,702,365 - Non-stock specific securities (B+C+D+E+F+G+H = I): 0 - 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% * For exchangeable bonds with stock as the underlying, and depositary receipts/derivative-linked securities backed by stock, those amounts are excluded from the denominator in calculating the ownership ratio. C. Detailed change history - May 18, 2026: On-market purchase (+), Common stock, Before: 0 → +5 → After: 5; Price: KRW 1,971,000 - May 19, 2026: On-market purchase (+), Common stock, Before: 5 → +5 → After: 10; Price: KRW 1,895,000 - May 22, 2026: On-market purchase (+), Common stock, Before: 10 → +2 → After: 12; Price: KRW 1,769,000 - Jun 1, 2026: On-market purchase (+), Common stock, Before: 12 → +19 → After: 31; Price: KRW 2,260,158 - Total: 0 → +31 → 31; Weighted average price: KRW 2,122,935 * For securities traded on the securities market, the date shown is the contract settlement date. ** For non-stock securities, the price refers to the exercise (conversion/exchange) price, or the trading price of shares acquired/disposed of through the exercise of rights; amounts in parentheses indicate the trading price of the relevant security.