[Amended] Material event report (decision to sell own convertible bonds)

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Enchem Co., Ltd. / Material Event Report (Decision to Sell Own Convertible Bonds) / 6.0

Amendment Report, July 24, 2026 1. Disclosure document being amended: Material event report (decision to sell own convertible bonds) 2. Original filing date: December 30, 2025 3. Amendments Item 10. Purpose of sale - Before: Working capital / After: Adjustment of asset-holding portfolio and strategic partnership purposes Item 13. Other matters relevant to investment judgment - Before: (b) Regarding item (a), the company sold, via call-option exercise, own convertible bonds acquired before maturity, on September 10, 2025, November 6, 2025, December 4, 2025, December 26, 2025 and December 30, 2025; as of report date the remaining face-amount balance after sale is KRW 0. - After: (b) Same sales occurred on the same five dates (September 10, 2025, November 6, 2025, December 4, 2025, December 26, 2025 and December 30, 2025). On July 8, 2026, through negotiation with the bondholder, the company acquired KRW 2 billion of own convertible bonds; the remaining balance held after sale is now KRW 2 billion. (h) By changing the sale-proceeds receipt method from cash only to cash plus shares of a specific company, the company intends to adjust its asset holdings for future strategic partnerships and portfolio management. Shares acquired: Wizdom common shares; price per share: KRW 76,172; shares acquired: 13,128; cash received: KRW 13,984. [Buyer information] - Note: Before: none stated. After: payment in shares of another company plus cash.

Material Event Report / Korea Exchange filing requirement To the Financial Services Commission / Korea Exchange, December 30, 2025 Company name: Enchem Co., Ltd. | CEO: Oh Jeong-gang Head office: 107 Biovalley-ro, Jecheon-si, Chungcheongbuk-do (944 Wangam-dong); Phone 041-568-9454; Website https://www.enchem.net Preparer: Managing Director Choi Jae-hee, Phone 041-568-9454

Decision to Sell Own Convertible Bonds 1. Type of bond: 13th series, unregistered interest-bearing unsecured private convertible bond 2. Issuance date: July 7, 2023 3. Issuance method: Private placement 4. Maturity date: July 7, 2028 5. Total face (electronically registered) amount: KRW 50,000,000,000 6. Pre-maturity acquisition details: face amount KRW 1,000,000,000; acquisition amount KRW 1,174,450,751; circumstances: exercise of the company's call option 7. Date of sale decision: December 30, 2025 8. Sale amount: KRW 1,000,000,000 - basis: negotiated with the buyer considering acquisition cost and other factors 9. Scheduled date of receiving sale proceeds: July 24, 2026 10. Purpose of sale: Adjustment of asset-holding portfolio and strategic partnership purposes 11. Conversion matters: conversion ratio 100%; conversion price as of report date KRW 70,711/share; shares to be issued upon conversion: Enchem registered common shares, 14,142 shares, 0.06% of total shares outstanding; conversion exercise period: July 7, 2024~June 7, 2028 12. Subject to Fair Trade Commission reporting: Not applicable 13. Other matters relevant to investment judgment (a) Item 5 above is the total electronically registered amount at original issuance; as of report date KRW 33,000,000,000 has been converted; the company has acquired a total face amount of KRW 18,100,368,822 before maturity via call-option exercise, paying total consideration (including call premium and other costs) of KRW 21,254,625,896. (b) [as amended above] (c) The "acquisition amount" in item 6 equals the sale amount multiplied by the ratio of the acquisition amount in (a) to the face amount. (d) Item 7 is the date of the board resolution approving the sale and of bond sale agreement execution. (g) 13th-series convertible bond issuance decision disclosed July 5, 2023; acquisition disclosure date July 7, 2023. (h) [as amended above]

[Buyer information]: Golden Value No. 5 New Technology Partnership - no relationship to company/largest shareholder - selected considering achievement of the company's management objectives - no related transactions within 6 months - face amount purchased: KRW 1,000,000,000 - note: payment in shares of another company plus cash.

[Where the buyer includes a corporation or entity] (1) Basic information: Golden Value No. 5 New Technology Partnership - 2 contributors; representative director (managing partner)/largest contributor: Plutus Investment Co., Ltd., 99.99% each. (2) Most recent settlement-period financials: Not stated - newly established in 2025.