Amended Stock Pledge Agreement Involving Largest Shareholder — Hana Materials

Summary

The largest shareholder, Hana Micron, amended its previously disclosed stock pledge agreement that could trigger a change in control if fully executed. Key changes include extending Contract #1 (NH Investment & Securities) by six months to November 16, 2026, and replacing Contract #2 with a new KB Securities pledge that reduces pledged shares from 423,819 to 256,806 while keeping the KRW 10 billion collateral amount unchanged. Total shares that would transfer if all pledges are executed rose slightly to 1,462,495 (7.39% stake), while cumulative pledged shares decreased to 4,966,013. The underlying credit support for Hana Micron Vina's USD 200 million loan was also restructured, switching lenders from KDB/Eximbank to Citibank N.A. and others, with Hana Materials' guarantee reduced from USD 240 million to USD 200 million. Overall, this is a routine refinancing/extension rather than new borrowing.

Historical Impact

10 past Collateral Provision · ≈ 8-K events at Hana Materials

Median +5d

+0.65%

Range

-10.17% to +17.23%

Positive outcomes

5/10

Filed	P₀	P₊₅	+5d
Jun 22, 2026	₩68,400	₩61,700	-9.80%
May 4, 2026	₩79,400	₩77,500	-2.39%

Full Translation

Hana Materials / Stock Pledge Agreement Involving Change of Largest Shareholder / (2026-05-18) Conclusion of Stock Pledge Agreement Involving Change of Largest Shareholder Amendment Report Amendment Date: 2026-05-18 1. Original disclosure document subject to amendment Conclusion of Stock Pledge Agreement Involving Change of Largest Shareholder 2. Original disclosure submission date: 2026-05-04 3. Reason for amendment 1) Change of contract (amendment) date and termination date due to extension 2) Re-execution after repayment of existing contract; change in pledged share quantity 4. Amendment details [Before amendment] 1. Information on pledgor (largest shareholder) - Shares owned upon full execution of pledge: 1,295,482 shares - Ownership ratio upon full execution: 6.55% 2. Total debt (borrowing) amount: KRW 343,860,000,000 3. Total collateral amount: KRW 343,860,000,000 4. Cumulative total pledged shares: 5,133,026 shares [After amendment] 1. Information on pledgor (largest shareholder) - Shares owned upon full execution of pledge: 1,462,495 shares - Ownership ratio upon full execution: 7.39% 2. Total debt (borrowing) amount: KRW 343,860,000,000 3. Total collateral amount: KRW 343,860,000,000 4. Cumulative total pledged shares: 4,966,013 shares [Individual pledge contract details] No. 1 contract execution date: 2025-11-17 → 2026-05-18 No. 1 termination date: 2026-05-18 → 2026-11-16 No. 2: Before: Pledged shares 423,819; Pledge period 2022-01-03 to 2026-05-18; Contract date 2025-12-19 After: Pledged shares 256,806; Pledge period 2026-05-18 to 2026-11-16; Contract date 2026-05-18 For No. 1, there is no change in collateral quantity. For No. 2, the collateral quantity changed but the collateral amount is unchanged. Shares: 423,819 → 256,806; Collateral amount: KRW 10,000,000,000 --- Main Disclosure --- Conclusion of Stock Pledge Agreement Involving Change of Largest Shareholder 1. Information on pledgor (largest shareholder) - Name: Hana Micron Co., Ltd. - As of disclosure date: Shares owned 6,428,508 (32.50%) - Upon full execution of pledge: Shares owned 1,462,495 (6.76%) 2. Total debt (borrowing) amount: KRW 342,860,000,000 3. Total collateral amount: KRW 342,860,000,000 4. Pledge details: Cumulative number of pledge contracts: 9; Cumulative pledged shares: 4,966,013 5. Pledge agreement execution date (this case): 2026-04-27 6. Other matters for investment reference Item 'No. 7' in [Individual pledge contract details]: Previously, Hana Materials provided a joint guarantee of USD 240 million for Hana Micron Vina Co., Ltd.'s USD 200 million loan (KDB, Korea Eximbank), with Hana Micron providing additional guarantee and collateral to Hana Materials as credit enhancement. This has been changed to: Hana Materials provides a joint guarantee of USD 200 million for Hana Micron Vina Co., Ltd.'s USD 200 million loan (Citibank N.A. and others), with Hana Micron providing additional guarantee and collateral to Hana Materials as credit enhancement. ※ Related disclosure: 2026-05-04 Conclusion of Stock Pledge Agreement Involving Change of Largest Shareholder [Individual pledge contract details] No.1 NH Investment & Securities / Hana Micron / Operating funds / KRW 2,000,000,000 / Summary pledge / 111,332 shares / Not subject to mandatory holding / 2022-01-03 to 2026-11-16 / Contract date 2026-05-18 No.2 KB Securities / Hana Micron / Operating funds / KRW 10,000,000,000 / Summary pledge / 256,806 shares / 2026-05-18 to 2026-11-16 / Contract date 2026-05-18 No.3 Daishin Securities / Hana Micron / Operating funds / KRW 40,000,000,000 / Summary pledge / 2,398,801 shares / 2022-01-03 to 2026-09-29 / Contract date 2026-03-30 No.4 Hana Securities / Hana Micron / Operating funds / KRW 9,000,000,000 / Summary pledge / 444,245 shares / 2023-05-18 to 2026-10-23 / Contract date 2026-04-27 No.5 Jeonbuk Bank / Hana Micron / Operating funds / KRW 4,000,000,000 / Registered pledge / 199,631 shares / 2022-11-22 to 2026-11-24 / Contract date 2022-11-22 No.6 Kyobo Securities / Hana Micron / Operating funds / KRW 5,000,000,000 / Summary pledge / 166,716 shares / 2022-10-30 to 2026-06-22 / Contract date 2026-03-23 No.7 (Pledgee) Hana Materials / (Pledgor) Hana Micron / Additional guarantee and collateral to joint guarantor / KRW 260,860,000,000 / Summary pledge / 987,633 shares / 2024-01-12 to 2029-11-28 / Contract date 2024-01-12 No.8 BNK Investment & Securities / Hana Micron / Operating funds / KRW 10,000,000,000 / Summary pledge / 272,777 shares / 2024-05-10 to 2026-06-22 / Contract date 2026-05-04 No.9 Yuanta Securities / Hana Micron / Operating funds / KRW 2,000,000,000 / Summary pledge / 86,300 shares / 2023-09-12 to 2026-06-22 / Contract date 2026-03-23 [Pledge execution conditions] All 9 contracts: In the event of default or breach of agreement. [Debtor information] 1. Basic information - Name: Hana Micron Co., Ltd. - Nationality: Korea - Address: Eumbong-myeon, Asan-si, Chungcheongnam-do - Business registration number: 312-81-50630 - Business: Semiconductor manufacturing - Largest shareholder: Choi Chang-ho (10,071,667 shares, 15.17%) - CEO: Lee Dong-cheol (150,002 shares, 0.23%) - FY2025 financials (KRW millions): Total assets 2,017,839; Capital 33,189; Total liabilities 1,365,163; Revenue 1,534,419; Total equity 652,676; Net income 65,579 - Auditor: Daejoo Accounting Firm; Audit opinion: Unqualified 2. Relationship: Debtor (Hana Micron) is the largest shareholder of the listed company; relationship to listed company is parent (subsidiary relationship listed as Hana Micron being parent of Hana Materials) 3. Transactions over past 3 years (excluding ordinary): 2025: Fund support agreement extension (KRW 20,000 million); 2024: Fund loan recovery (KRW 21,000 million), participation in rights offering (KRW 7,493 million), fund support agreement extension (KRW 20,000 million); 2023: Fund loan extension (KRW 21,000 million), fund support agreement extension (KRW 20,000 million)