Capital Research cuts stake to 3.53% from 5.05% via market sales — SK Hynix

Summary

Capital Research and Management Company, a major US institutional investor, filed an abbreviated large-shareholding report disclosing that its combined holding (with five affiliated Capital Group entities) fell to 25,149,374 shares (3.53%) from 36,730,947 shares (5.05%). The 1.52 percentage-point reduction — roughly 11.58 million shares — was executed through on-market and off-market sales for the stated purpose of recovering investment capital. The holding purpose remains classified as 'simple investment,' not management influence. Because the stake has dropped below the 5% reporting threshold, this may be the filer's final mandatory disclosure absent future buying. The sale by a long-term foreign institutional holder of this size can weigh on near-term sentiment, particularly given SK Hynix's heavy foreign ownership base.

Historical Impact

5 past Large Holding Report (5%+) · ≈ Schedule 13D/G events at SK Hynix

Median +5d

+11.80%

Range

+0.79% to +16.40%

Positive outcomes

5/5

Filed	P₀	P₊₅	+5d
Feb 20, 2026	₩949,000	₩1,061,000	+11.80%
Feb 9, 2026	₩887,000	₩894,000

Full Translation

Report on Mass Holding of Stocks, etc. (Abbreviated) Version 6.0 SK Hynix Inc. 1111 1000 2026-05-12 Report on Mass Holding of Stocks, etc. (Abbreviated form: applicable when the filing under Article 147 of the Financial Investment Services and Capital Markets Act is NOT for the purpose of influencing management control, or when the filer is a professional investor under the latter part of paragraph 1 of the same article) To: Financial Services Commission Reporting Obligation Trigger Date: May 13, 2026 To: Korea Exchange Report Preparation Reference Date: May 29, 2026 Filer: Capital Research and Management Company Authorized Representative: Attorney Han Byung-ha [Summary Information] Professional Investor Classification under Reporting Exception: - Issuer: SK Hynix Inc. Relationship with Issuer: Other Report Type: Change Number and Ratio of Shares Held: - Previous Report: 36,730,947 shares (5.05%) - This Report: 25,149,374 shares (3.53%) Voting Rights and Ratio: - Previous Report: - / - - This Report: - / - Reason for Report: - Disposal of issuer's shares on-market for the purpose of recovering investment capital - Disposal of issuer's shares off-market for the purpose of recovering investment capital Holding Purpose: Simple Investment The filer confirms that, as of the report preparation reference date, the holding status of the filer and special-related persons has been accurately prepared in accordance with relevant laws and disclosure precautions, and that there are no material misstatements or omissions. Confirmation Letter (Simple Investment Purpose): - 단순투자확인서.jpg (Confirmation Letter) - 단순투자확인서 번역본.jpg (Translation) [Part 1: Overview of the Report] 1. Matters Concerning the Issuer Company Name: SK Hynix Inc. Company Code: 000660 Corporate Classification: KOSPI-listed corporation Total Issued Voting Shares: 712,702,365 shares 2. Matters Concerning the Mass Holder A. Filer (1) Filer Overview Report Type: Change Joint Filing: Yes Filer Classification: Foreign corporation Nationality: USA Name (Korean): 캐피탈 리서치 앤 매니지먼트 컴퍼니 Name (English): Capital Research and Management Company Address: 333 South Hope Street, 55th Floor, Los Angeles, California 90071-1406 Registration: CRD 110885 Occupation: Investment Advisory Relationship with Issuer: Other Contact: Kim & Chang Law Offices — Attorney Han Byung-ha, Tel 02-648****, Fax 02-737****, Email ****a.han@kimchang.com (2) Filer Details Legal Nature: Corporation Total Assets / Liabilities / Capital / Capital Stock: - Representative: Donald H. Rolfe (Secretary) Decision-Making Body: Board of Directors, Officers Largest Shareholder: The Capital Group Companies, Inc. Largest Shareholder Stake: 100% B. Special-Related Persons (1) Overview 1. Capital International, Inc. — Foreign corp / Affiliate / CRD 110682 / USA / 333 South Hope Street, Los Angeles, CA 90071 / Investment Advisor / Other 2. Capital International Sarl — Foreign corp / Affiliate / CRD 162640 / USA / 3, place des Bergues, 1201 Geneva, Switzerland / Investment Advisor / Other 3. Capital Group Private Client Services, Inc. — Foreign corp / Affiliate / CRD 312837 / USA / 333 South Hope Street, Los Angeles, CA 90071 / Investment Advisor / Other 4. Capital International Limited — Foreign corp / Affiliate / FCA 119193 / UK / 1 Paddington Square London W2 1GL / Investment Advisor / Other 5. Capital Group Investment Management Pte. Ltd. — Foreign corp / Affiliate / 549300Q36PMBAR1HRM92 / Singapore / One Raffles Quay 43rd floor North Tower 048583 / Investment Advisor / Other (2) Details of Special-Related Persons 1. Capital International, Inc. — Legal Nature: Stock Corporation; Representative: Naseem Z. Nixon (Secretary); Decision-Making Body: Board of Directors, Officers; Largest Shareholder: Capital Group International, Inc. (100%) 2. Capital International Sarl — Legal Nature: Corporation; Representative: Guido Caratsch (Senior Vice President (Directeur), Senior Counsel & Secretary); Decision-Making Body: Board of Directors, Officers; Largest Shareholder: Capital Group International, Inc. (100%) 3. Capital Group Private Client Services, Inc. — Legal Nature: Stock Corporation; Representative: Guido Caratsch; Decision-Making Body: Board of Directors, Officers; Largest Shareholder: Capital Group International, Inc. (100%) 4. Capital International Limited — Legal Nature: Limited Company; Representative: Guido Caratsch; Decision-Making Body: Board of Directors, Officers; Largest Shareholder: Capital Group International, Inc. (100%) 5. Capital Group Investment Management Pte. Ltd. — Legal Nature: Limited Company; Representative: Guido Caratsch; Decision-Making Body: Board of Directors, Officers; Largest Shareholder: Capital Group International, Inc. (100%) C. Collective Investment Business Operator: Not applicable (all fields '-') 3. Number and Ratio of Shares Held Reference Date / Filer / Shares / Stock Certificates / Total Issued Voting Shares / Filer Name / Number of Special-Related Persons / Number of Shares / Ratio (%) / Number of Shares / Ratio (%) Previous Report: January 30, 2026 [Translation truncated]