Rights offering (paid-in capital increase) decision (subsidiary)

What happened

HS Hyosung Advanced Materials / Rights Offering Decision (Material Event of Subsidiary) / (2026.07.09) Rights Offering Decision (Material Event of Subsidiary), material event report of the subsidiary HS Hyosung Energy Solution Korea Co., Ltd.

1. Type and number of new shares: common shares 7,000,000; special class shares 2. Par value per share (KRW): 5,000 3. Total shares issued before the capital increase: common shares 200,000; special class shares 4. Purpose of financing: facility funds KRW 35,000,000,000; business-acquisition funds,; working capital,; debt repayment,; funds to acquire securities of other companies,; other 5. Capital increase method: shareholder rights offering 6. New share issue price: confirmed price, common shares KRW 5,000; special class shares 7. Method of determining the issue price: par-value issuance by board resolution 8. Record date for allotment of new shares: 2026-06-29 9. New shares allotted per share held: 35 10. Preferential allotment ratio for employee stock ownership association members: - 11. Expected subscription period: employee stock ownership association,; existing shareholders 12. Payment date: 2026-07-28 13. Plan for handling forfeited shares: - 14. Dividend record date for new shares: - 15. Expected date of delivery of new share certificates: - 16. Lead underwriter (if not a direct public offering): - 17. Whether subscription rights are transferable: not applicable 18. Board resolution (decision) date: 2026-07-08 (outside directors present: 3; absent:; audit committee member present) 19. Whether a securities registration statement must be filed: No 20. Reason for exemption: not a public offering, and the subsidiary is an unlisted company 21. Whether subject to Fair Trade Commission reporting: No 22. Other material matters relevant to investment decisions 1. Extra Mile Materials BV (Belgium) changed its name to HS Hyosung Energy Solution BV on June 19, 2026; HS Hyosung Energy Solution Korea Co., Ltd. is 100%-owned by HS Hyosung Energy Solution BV. For the initial equity acquisition of HS Hyosung Energy Solution BV, see the company's disclosure "Decision to Acquire Shares and Equity Securities of Another Company" filed on March 31, 2026. 2. The payment date above is the expected deadline for payment of the share subscription price. 3. The board resolution (decision) date above is the board resolution date of HS Hyosung Energy Solution Korea Co., Ltd. 4. The subsidiary's total assets below are as of its incorporation on June 1, 2026.

Related disclosures: None

[Matters concerning the subsidiary] Subsidiary name: HS Hyosung Energy Solution Korea Co., Ltd. (English: HS Hyosung Energy Solution Korea Co., Ltd.) Representative: Lee Gi-su Main business: manufacture and production of silicon anode materials Whether a major subsidiary: No Subsidiary's total assets (KRW): 1,000,000,000 Parent company's consolidated total assets (KRW): 3,903,414,776,514 Ratio to the parent's consolidated total assets: 0.03%