Samsung Asset Management Cuts Stake to 3.70% from 5.06% — Silicon Mitus

Summary

Samsung Asset Management filed a simplified 5% disclosure reporting its holding fell by 222,368 shares to 601,250 shares, lowering its ownership ratio from 5.06% to 3.70% as of June 12, 2026. The 1.36 percentage-point reduction was driven by a mix of on-market sales, ETF creation/redemption flows, and entrusted management activity through Samsung Active Asset Management. The filing is for simple investment purposes with no intent to influence management. With the stake dropping below the 5% threshold, future trades will no longer trigger mandatory disclosure, reducing visibility into this institution's positioning.

Historical Impact

3 past Large Holding Report (5%+) · ≈ Schedule 13D/G events at Silicon Mitus

Median +5d

+0.79%

Range

-2.56% to +6.35%

Positive outcomes

2/3

Filed	P₀	P₊₅	+5d
Jul 1, 2026	₩40,950	₩39,900	-2.56%
Apr 9, 2026	₩50,400	₩53,600

Full Translation

Report on Mass Holding of Stocks, etc. (Simplified) Filing Company: LX Semicon (Silicon Mitus) Filing Date: June 12, 2026 (Simplified format: Filing under Article 147 of the Financial Investment Services and Capital Markets Act where the purpose is NOT to influence management control, or where 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: June 12, 2026 To: Korea Exchange Report Preparation Reference Date: June 12, 2026 Filer: Samsung Asset Management === SUMMARY === Professional Investor Classification (Reporting Exception): - Issuer Name: LX Semicon Relationship to Issuer: Shareholder Report Type: Change Number and Ratio of Shares Held: - Previous Report: 823,618 shares (5.06%) - Current Report: 601,250 shares (3.70%) Voting Rights: None reported Reason for Filing: Change reporting obligation triggered by trading (Includes portion entrusted to Samsung Active Asset Management for management) Holding Purpose: Simple Investment The filer hereby confirms that the holdings of the filer and special-related persons as of the reference date have been accurately prepared in accordance with applicable laws and reporting guidelines, with no false statements or omissions of material matters. Certificate (Simple Investment Purpose) — No Management Participation Intent — Samsung === PART 1: OVERVIEW OF FILING === 1. Information on the Issuer - Company Name: LX Semicon - Company Code: 108320 - Corporation Type: KOSDAQ-listed corporation - Total Issued Shares with Voting Rights: 16,264,300 shares 2. Information on the Mass Holder A. Filer (1) Filer Overview - Report Type: Change (Individual) - Filer Classification: Financial Institution - Nationality: Republic of Korea - Name (Korean): Samsung Asset Management - Name (English): SAMSUNG ASSET MANAGEMENT - Address: Seocho-daero 74-gil, Seocho-gu, Seoul - Business Registration Number: 501-81-23179 - Business Type: Collective Investment Business, etc. - Relationship to Issuer: Shareholder - Contact: Park Myung-gu, Senior Manager, Fund Accounting Team 1 (2) Detailed Filer Information (as of end of March 2026) - Legal Form: Stock Company - Total Assets (or AUM): KRW 1,191,074,278,004 - Total Liabilities: KRW 141,792,856,335 - Total Equity: KRW 1,049,281,421,669 - Capital: KRW 93,430,000,000 - Representative: CEO Kim Woo-seok - Decision-Making Body: Investment Management Committee - Largest Shareholder: Samsung Life Insurance - Largest Shareholder Ownership: 100% B. Special-Related Persons: None C. Collective Investment Manager (1) Overview - Name: Samsung Asset Management - Business Registration Number: 501-81-23179 - Target Collective Investment Vehicles: Collective Investment Vehicles and Discretionary - Nationality: Republic of Korea - Address: 11, Seocho-daero 74-gil, Seocho-gu, Seoul (2) Details - Legal Form: Stock Company - Capital: KRW 93,430,000,000 - Total AUM: KRW 465.9 trillion - Representative: CEO Kim Woo-seok - Decision-Making Body: Investment Management Committee - Largest Shareholder: Samsung Life Insurance (Hong Won-hak) - Largest Shareholder Ownership: 100% 3. Number and Ratio of Shares Held Previous Report (April 6, 2026): - Filer: Samsung Asset Management - Shares: 823,618 (5.06%) - Total Voting Shares Outstanding: 16,264,300 Current Report (June 12, 2026): - Filer: Samsung Asset Management - Shares: 601,250 (3.70%) - Total Voting Shares Outstanding: 16,264,300 Change: -222,368 shares (-1.36%p) 4. Reason for Change - Method: Purchase / Sale - Reason: Simple additional acquisition / disposition === PART 2: MASS HOLDING DETAILS === 1. Holdings by Type of Securities Filer (Samsung Asset Management): 601,250 common shares (3.70%); no convertibles, warrants, or other potential shares. * The filer's holdings include 6,028 shares (0.04%) entrusted to Samsung Active Asset Management for management. - Total Issued Shares with Voting Rights: 16,264,300 - Holding Ratio of Securities: 3.70% - Holding Ratio of Common Stock: 3.70% 2. Proprietary vs. Customer Account Breakdown (for Financial Institutions) - Proprietary Account: - - Customer Account: 601,250 shares (3.70%) - Total: 601,250 shares (3.70%) === PART 3: MAJOR CHANGES SINCE PREVIOUS FILING === 1. Summary of Changes A. Changes in Shares Held - Filer (Samsung Asset Management): -222,368 shares (-1.36%p) - Special-Related Persons: None 2. Detailed Change History A. Detailed Share Movement (Unit: shares, KRW) - 2026.04.07: On-market purchase of 1,494 shares at KRW 49,040 (from 823,618 to 825,112) - 2026.04.07: Other (+) — ETF creation of 3,140 shares at KRW 49,300 (from 825,112 to 828,252) - 2026.04.07: Other (-) — ETF redemption of 10,465 shares at KRW 49,300 (from 828,252 to 817,787) - 2026.04.08: On-market purchase of 14,198 shares at KRW 51,036 (from 817,787 to 831,985) - 2026.04.08: Other (+) — [Translation truncated]