Executive Kang Dong-ho Fully Divests 5,000 Shares via Open-Market Sale — Hana Materials

Summary

Managing Director Kang Dong-ho, a registered executive at the company since November 2021, reported the complete disposal of his entire 5,000-share holding (0.03% stake) through open-market sales on May 27-28, 2026. Shares were sold at an average price of KRW 85,727, with 1,206 shares sold at KRW 83,000 on May 27 and the remaining 3,794 shares at KRW 86,593 on May 28. His ownership ratio dropped from 0.03% to 0.00%, leaving him with zero shares. While the absolute size is small and unlikely to move the stock materially, full insider exits can carry a mildly negative signaling effect.

Historical Impact

2 past Insider Ownership Change · ≈ Form 4 events at Hana Materials

Median +5d

-5.16%

Range

-5.21% to -5.10%

Positive outcomes

0/2

Filed	P₀	P₊₅	+5d
Feb 4, 2026	₩63,300	₩60,000	-5.21%
Jan 28, 2026	₩66,700	₩63,300	-5.10%

Full Translation

Report on Ownership Status of Specific Securities by Executives and Major Shareholders Version 6.1 Hana Materials Co., Ltd. 2026-05-27 Report on Ownership Status of Specific Securities by Executives and Major Shareholders To: Securities and Futures Commission To: Korea Exchange Date reporting obligation arose: May 27, 2026 Report reference date: May 29, 2026 * The reporter hereby confirms that, as of the report reference date, the ownership status of specific securities has been accurately prepared in accordance with relevant laws and reporting instructions, and that there are no false statements or omissions of material facts. Reporter: Kang Dong-ho 1. Information on the Issuing Company - Company name: Hana Materials Co., Ltd. - Corporate classification: KOSDAQ-listed company - Company code: 166090 - Total number of issued shares: 19,777,674 2. Information on the Reporter - Report type: Change - Reporter classification: Individual (domestic) - Name (Korean): Kang Dong-ho - Name (Hanja/English): 姜東昊 - Date of birth or business registration number: 720212 - Address (down to eup/myeon/dong): Yongsan-dong, Yongsan-gu, Seoul - Relationship with issuer: Executive (registered status): Registered executive - Position: Managing Director (Jeonmu) - Appointment date: 2021.11.01 - Retirement date: - - Major shareholder: - - Business contact: Hana Materials Co., Ltd., Finance Group, Chief (Choi Jae-hoon) - Phone: 041-41******, Fax: 041-42******, Email: ******@hanamts.com 3. Ownership Status of Specific Securities A. Number and Ratio of Specific Securities Owned - Previous report (Jan 12, 2022): 5,000 specific securities (0.03%); 5,000 shares (0.03%) - This report (May 29, 2026): 0 specific securities (0.00%); 0 shares (0.00%) - Change: -5,000 (-0.03%); -5,000 shares (-0.03%) B. Ownership Details by Type of Specific Securities - Common stock (A): - - Warrants (B), Convertible bonds (C), Bonds with warrants (D), Profit-participating bonds (E), Exchangeable bonds (F), Depositary receipts (G), Other (H): all - - Total (I): - - Total issued shares (J): 19,777,674 - 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 stock (A/J) × 100: 0.00% * Only exchangeable bonds where the exchange target is stock, and depositary receipts/derivative-linked securities whose underlying asset is stock, are excluded from the denominator when calculating the ownership ratio. C. Detailed Change History - Reason: On-market sale (-); Change date: 2026.05.27; Type: Common stock; Holdings before: 5,000; Change: -1,206; Holdings after: 3,794; Disposal price: KRW 83,000 - Reason: On-market sale (-); Change date: 2026.05.28; Type: Common stock; Holdings before: 3,794; Change: -3,794; Holdings after: 0; Disposal price: KRW 86,593 - Total: Before 5,000; Change -5,000; After 0; Average disposal price: KRW 85,727 * For trades on the securities market, the date refers to the contract settlement date. ** For non-stock securities, the price refers to the exercise (conversion/exchange) price of the security or the share trading price acquired/disposed of through the exercise of the security's rights; amounts in parentheses indicate the trading price of the relevant security.