Largest Shareholder Reports Sale of 80,000 Shares, Stake Drops to 15.03% — Hana Micron

Summary

The company's largest shareholder and de facto controlling shareholder, Choi Chang-ho, reported a change in ownership of specified securities. He sold 80,000 common shares on the open market on June 2, 2026, at a disposal price of KRW 40,159 per share, classified as a simple sale. As a result, his holdings decreased from 10,071,667 shares (15.32%) to 9,991,667 shares (15.03%), a reduction of 0.29 percentage points. While the absolute change is modest, insider selling by the controlling shareholder can be interpreted as a mildly negative signal regarding near-term share price expectations.

Historical Impact

10 past Insider Ownership Change · ≈ Form 4 events at Hana Micron

Median +5d

+2.88%

Range

-6.66% to +4.48%

Positive outcomes

6/10

Filed	P₀	P₊₅	+5d
Jun 4, 2026	₩45,400	₩47,050	+3.63%
Jun 2, 2026	₩41,400	₩43,050

Full Translation

Report on Ownership Status of Specified Securities by Executives and Major Shareholders Form 6.1 Hana Micron Co., Ltd. Date: June 2, 2026 Report on Ownership Status of Specified Securities by Executives and Major Shareholders To: Securities and Futures Commission To: Korea Exchange Date of Reporting Obligation: June 2, 2026 Report Reference Date: June 2, 2026 * The reporter confirms that, as of the report reference date, the ownership status of his specified securities has been accurately prepared in accordance with relevant laws and notes for preparation, and that there is no false statement or omission of material matters. Reporter: Choi Chang-ho 1. Information on the Issuing Company - Company Name: Hana Micron Co., Ltd. - Corporate Classification: KOSDAQ-listed corporation - Company Code: 067310 - Total Issued Shares: 66,478,426 2. Information on the Reporter - Report Classification: Change - Reporter Type: Individual (Domestic) - Name (Korean): Choi Chang-ho - Name (Chinese/English): 崔昌浩 (Choi Chang Ho) - Date of Birth or Business Registration Number: 501226 - Address: Dongcheon-dong, Suji-gu, Yongin-si, Gyeonggi-do - Relationship with Issuer: - Executive (Registered): - - Position: Largest Shareholder - Appointment Date: - - Retirement Date: - - Major Shareholder: De facto controlling shareholder - Business Contact: - Affiliated Company: Hana Micron Co., Ltd. - Department: Finance Group - Position: Senior Manager - Phone: 041-42****** - Contact: Kim Jae-wook - Fax: 041-42****** - Email: ******hanamicron.co.kr 3. Ownership Status of Specified Securities A. Number and Ownership Ratio of Specified Securities Held - Previous Report (2024.08.14): 10,071,667 securities (15.32%) / 10,071,667 shares (15.32%) - Current Report (2026.06.02): 9,991,667 securities (15.03%) / 9,991,667 shares (15.03%) - Change: -80,000 (-0.29%p) / -80,000 (-0.29%p) B. Ownership Details by Type of Specified Securities - Common Shares: 9,991,667 - Warrants: - - Convertible Bonds: - - Bonds with Warrants: - - Profit-Participating Bonds: - - Exchangeable Bonds: - - Depositary Receipts: - - Other: - - Total: 9,991,667 (15.03%) - Total Issued Shares (J): 66,478,426 - Number of Non-Stock Specified Securities: - - Ownership Ratio of Specified Securities: 15.03% - Ownership Ratio of Common Shares: 15.03% C. Detailed Change History - Reason for Change: On-market Sale (-) - Change Date: June 2, 2026 - Type of Specified Securities: Common Shares - Shares Held Before: 10,071,667 - Change: -80,000 - Shares Held After: 9,991,667 - Acquisition/Disposal Unit Price: KRW 40,159 (disposal price) - Notes: Simple sale - Trading Plan Report Date: - - Total: -80,000 shares * For trades on the securities market, the contract settlement date applies. ** For securities other than stocks, 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 refer to the trading unit price of the relevant security.