Material event report (decision to redeem own convertible bonds early)

What happened

KS Industry Co., Ltd. Material event report / Matter subject to KRX reporting obligation To: Financial Services Commission / Korea Exchange August 18, 2026 Company name: KS Industry Co., Ltd. CEO: Song Byeong-gwon Head office location: 223 Seokgyocheon-gil, Gunbuk-myeon, Haman-gun, Gyeongsangnam-do Phone: 055-992-9831 Website: http://ks-industry.co.kr Preparer: (Title) Vice President (Name) Kim Jung-il (Phone) 055-992-9831

Decision to redeem own convertible bonds before maturity 1. Type of bond: Series 18, unregistered, interest-bearing, unsecured, privately placed convertible bond 2. Bond issuance date: March 24, 2026 3. Bond issuance method: Private placement 4. Bond maturity date: March 24, 2031 5. Total face (electronically registered) amount of bond (KRW): 10,100,000,000 6. Face (electronically registered) amount of bond subject to acquisition (KRW): 3,000,000,000 7. Date of acquisition decision: August 18, 2026 8. Acquisition amount: amount (KRW) 3,000,000,000; basis of calculation: partial principal; (expected) payment date: August 18, 2026; source of acquisition funds: own funds 9. Acquisition method: Over-the-counter purchase 10. Reason for acquisition before maturity: Bondholder's early redemption request following an event of default triggered by a disclaimer of opinion on the half-year review 11. Future handling plan: Retirement or resale to be decided later 12. Conversion-related matters: Conversion ratio (%): 100; Conversion price as of reporting date (KRW/share): 4,420; Type of stock to be issued upon conversion: KS Industry Co., Ltd. registered common stock; Number of shares: 678,733; Ratio to total shares outstanding (%): 6.85; Conversion request period: start March 24, 2027; end February 23, 2031 13. Remaining face (electronically registered) balance of bond after acquisition (KRW): 3,100,000,000 14. Subject to Fair Trade Commission reporting: Not applicable 15. Other matters for investment reference: - This bond acquisition is due to the bondholder's early redemption request following an event of default triggered by a disclaimer of opinion on the half-year review. - As a result of this acquisition, the Company has acquired KRW 7,000,000,000 of the face amount of the Series 18 convertible bond, leaving KRW 3,100,000,000 of face amount not acquired. - "7. Date of acquisition decision" above is the date on which the Company paid the acquisition amount. - "8. Acquisition amount" above is a partial principal amount. - The "conversion price as of the reporting date" under "12. Conversion-related matters" was calculated to produce the same effect the bondholder would have had if the conversion right had been exercised and the entire amount converted into shares immediately before the capital reduction. - The "number of convertible shares" is the number of shares corresponding to that conversion price. - The ratio under "shares to be issued upon conversion" is based on 9,910,487 shares issued after the capital reduction.

[Matters concerning the seller] Seller name | Relationship with company or largest shareholder | Selection background | Transactions/plans within 6 months before/after acquisition decision | Face amount of bond sold (KRW) | Note Marine Robotics Fund No. 1 Investment Partnership: -; -; -; 3,000,000,000; -

[Where sellers include a corporation or organization] (1) Basic information: Name: Urban Holdings Co., Ltd.; Number of investors: 1; CEO (representative partner): Jo Su-bin (100%); Managing partner: -; Largest shareholder (largest investor): Jo Su-bin (100%) (2) Key financial matters for the most recent fiscal year (Unit: KRW million): Fiscal year -; Settlement month -; Total assets -; Revenue -; Total liabilities -; Net income (loss) -; Total equity -; External auditor -; Capital stock -; Audit opinion - ※ This is a newly established corporation