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

What happened

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 - reason: change in method of receiving sale proceeds - Before: Working capital / After: Adjustment of asset-holding portfolio and strategic partnership purposes Item 13. Other matters relevant to investment judgment - reason: change in payment method and acquisition of own convertible bonds - Before: (b) Regarding item (a), the company sold, via call-option exercise, own convertible bonds acquired before maturity, on June 26, 2025 and December 30, 2025; as of the report date the remaining face-amount balance after sale is KRW 0. - After: (b) Same sales occurred on June 26, 2025 and December 30, 2025. On June 19, 2026, through negotiation with the bondholder, the company acquired KRW 800 million of own convertible bonds; the remaining balance held after sale is now KRW 800 million. (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: amended due to change in payment method - payment now 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: 11th series, unregistered interest-bearing unsecured private convertible bond 2. Issuance date: May 11, 2023 3. Issuance method: Private placement 4. Maturity date: May 11, 2028 5. Total face (electronically registered) amount: KRW 31,500,000,000 6. Pre-maturity acquisition details of bonds subject to sale: face amount KRW 1,000,000,000; acquisition amount KRW 1,160,178,092; 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 73,305/share; shares to be issued upon conversion: Enchem registered common shares, 13,641 shares, 0.06% of total shares outstanding; conversion exercise period: May 11, 2024~April 11, 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 29,700,000,000 has been converted; the company has acquired a total face amount of KRW 11,000,000,000 before maturity via call-option exercise, paying total consideration (including call premium and other costs) of KRW 12,761,959,004. (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) 11th-series convertible bond issuance decision disclosed May 9, 2023; acquisition disclosure date May 11, 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, so no financial history reported.