Chairman Kwak Dong-shin Increases Stake via Open-Market Purchase — Hanmi Semiconductor

Summary

Chairman and CEO Kwak Dong-shin purchased 29,336 common shares on the open market on July 30, 2026 at an average price of KRW 170,565 per share, for a total consideration of approximately KRW 5.0 billion (~USD 3.6 million). Following settlement on August 3, 2026, his beneficial ownership rises to 32,048,145 shares, or 33.62% of total shares outstanding (95,312,200). The trade was pre-announced under a trading plan filed on July 2, 2026, indicating a deliberate, planned accumulation rather than a reactive purchase. While the incremental ownership gain is modest at 0.03 percentage points, open-market buying by a controlling chairman at current price levels carries a constructive signal on management's view of intrinsic value.

Historical Impact

10 past Insider Ownership Change · ≈ Form 4 events at Hanmi Semiconductor

Median +5d

-0.34%

Range

-15.37% to +45.76%

Positive outcomes

5/10

Filed	P₀	P₊₅	+5d
Jul 2, 2026	₩219,500	₩209,000	-4.78%
Jun 16, 2026	₩328,500	₩278,000	-15.37%

Full Translation

REPORT ON OWNERSHIP STATUS OF SPECIFIC SECURITIES BY DIRECTORS AND MAJOR SHAREHOLDERS Version: 6.1 Company: Hanmi Semiconductor Co., Ltd. Filing Date: August 3, 2026 Report on Ownership Status of Specific Securities by Directors and Major Shareholders To: Korea Securities and Futures Commission To: Korea Exchange Obligation Date: August 3, 2026 Report Basis Date: July 30, 2026 ※ The reporter confirms that, as of the report basis date, the information regarding the reporter's ownership of specific securities has been accurately prepared in accordance with relevant laws and filing guidelines, and that there are no false statements or material omissions. Reporter: Kwak Dong-shin, Chairman of Hanmi Semiconductor 1. ISSUING COMPANY Company Name: Hanmi Semiconductor Co., Ltd. Entity Type: KOSPI-Listed Corporation Company Code: 042700 Total Shares Issued: 95,312,200 2. REPORTER INFORMATION Report Type: Change Reporter Classification: Individual (Domestic) Name (Korean): 곽 동 신 Name (Chinese/English): 郭東信 / Kwak, Dong Shin Date of Birth: December 17, 1974 Address (district level): Hannam-dong, Yongsan-gu, Seoul Relationship to Issuer: Executive (Registered Director) Title: Representative Director & Chairman Date Appointed: March 16, 2007 Date of Resignation: — Major Shareholder Status: De Facto Controlling Shareholder Contact Information: Affiliated Company: Hanmi Semiconductor Co., Ltd. Department: IR & Public Relations Title: Assistant Manager Phone: 032-58-×××××× Name: Jo Jae-hoon Fax: 032-57-×××××× Email: ××××××9@hanmisemi.com 3. OWNERSHIP STATUS OF SPECIFIC SECURITIES a. Number and Ownership Ratio of Specific Securities Held | | Report Basis Date | Specific Securities (shares) | Ratio (%) | Common Shares (shares) | Ratio (%) | |---|---|---|---|---|---| | Previous Report | June 16, 2026 | 32,018,809 | 33.59 | 32,018,809 | 33.59 | | This Report | July 30, 2026 | 32,048,145 | 33.62 | 32,048,145 | 33.62 | | Change | | +29,336 | +0.03 | +29,336 | +0.03 | b. Holdings by Type of Specific Securities Common Shares: 32,048,145 shares (33.62%) Warrant Certificates: — Convertible Bonds: — Bonds with Warrant: — Participating Bonds: — Exchangeable Bonds: — Depositary Receipts: — Other: — Total Specific Securities: 32,048,145 shares (33.62%) Total Shares Issued (J): 95,312,200 Non-share Specific Securities: — Ownership Ratio: 33.62% Common Share Ownership Ratio: 33.62% c. Detailed Change Log | Reason | Settlement Date | Type | Shares Before | Change | Shares After | Price per Share (KRW) | Note | Trade Plan Filed | |---|---|---|---|---|---|---|---|---| | Open-Market Purchase (+) | August 3, 2026 | Common Share | 32,018,809 | +29,336 | 32,048,145 | 170,565 | — | July 2, 2026 | | Total | | | 32,018,809 | +29,336 | 32,048,145 | 170,565 | — | | ※ The report basis date for this filing is the trade execution date (July 30, 2026). The actual settlement date (change date) is execution date + 2 business days, i.e., August 3, 2026.