Material event report (equity acquisition)

What happened

Material Event Report / Exchange Reporting Obligation To: Financial Services Commission / Korea Exchange Date: July 15, 2026 Company name: Mecaro Co., Ltd. CEO: Lee Jae-jeong, Park Yeong-sun Head office: 89 Sandan-ro 121beon-gil, Pyeongtaek-si, Gyeonggi-do (Tel) 031-663-4476 (Website) http://www.mecaro.com Preparer: (Title) Head of Management Strategy Division (Name) Ahn Jae-woo (Tel) 031-663-4476

Decision to Acquire Shares and Equity Securities of Another Company

1. Issuing company Company name: Samil Tech Co., Ltd. Nationality: Republic of Korea Representative: Kim Jong-eun Capital stock (KRW): 728,000,000 Relationship with the Company: - Total issued shares: 130,600 Principal business: Development and manufacture of semiconductor manufacturing equipment - Whether new shares were acquired via third-party allotment within the last 6 months: No

2. Details of the acquisition Number of shares acquired: 130,600 Acquisition amount (KRW) (A): 35,599,992,800 Total assets (KRW) (B): 225,650,454,777 A/B (%): 15.78 Equity capital (KRW) (C): 205,450,522,470 A/C (%): 17.33

3. Shares held and equity ratio after acquisition Shares held: 130,600; Equity ratio: 100.00%

4. Purpose of acquisition To secure new growth engines and enhance corporate value through synergy with the Company's existing business.

5. Expected acquisition date: July 31, 2026

6. Counterparty Company name (name): Kim Jong-eun and 9 others Capital stock (KRW): -; Principal business: -; Head office (address): -; Relationship with the Company: -

7. Payment of transaction price 1) Payment method: Cash payment 2) Payment timing: 100% of the transaction price to be paid on July 31 or on a date agreed by both companies 3) Funding method: Own funds

8. External valuation Whether an external valuation was obtained: Yes - Basis and reason: a. Basis: Appropriateness assessment under Article 161 of the Financial Investment Services and Capital Markets Act and Article 171 of its Enforcement Decree. b. Reason: Reference material to assess the appropriateness of the acquisition price the Company has decided to pay, and as an attachment to the material event report. Name of external valuation institution: Samdo Accounting Corporation External valuation period: June 10, 2026 - July 14, 2026 External valuation opinion: Appropriate

9. Date of board resolution (decision date): July 15, 2026 - Outside directors present: 1; Absent: - - Attendance of the audit committee member who is not an outside director: Present

10. Whether this constitutes a backdoor listing: Not applicable - Plans for third-party-allotment capital increase etc. within the next 6 months: Not applicable

11. Whether the issuing company (the other company) meets backdoor-listing requirements: Not applicable

12. Whether subject to Fair Trade Commission reporting: Not applicable

13. Whether a put option or similar contract was entered into: No - Contract details: -

14. Future plans for corporate restructuring - As of the filing date, the Company has not finalized any specific plans for future restructuring.

15. Other material matters relevant to investment decisions - Item 1 ("Issuing company's capital stock and total issued shares") above is as of the filing date. - The total assets and equity capital in Item 2 ("Details of the acquisition") above are based on the consolidated financial statements as of the end of the most recent fiscal year (2025). - Item 5 ("Expected acquisition date") above refers to the expected closing date, i.e., the point at which, assuming all closing conditions are satisfied, the acquirer completes payment of the transaction price to the seller. The Company set the expected acquisition date as July 31, 2026, taking into account the performance period of the contract; the actual closing date may change depending on the contract terms and discussions between the parties. - Item 12 ("Whether subject to Fair Trade Commission reporting") above refers to a business combination filing. - For details of the target company, please refer to the opinion letter of the external valuation institution (Samdo Accounting Corporation). - The above acquisition schedule and payment details may change depending on discussions with the counterparty, and an amendment will be filed if changes occur.

Related disclosures: None

[Summary Financial Status of the Issuing Company] (Unit: KRW millions) Category / Total assets / Total liabilities / Total equity / Capital stock / Revenue / Net income / Audit opinion / External auditor Current year: 21,178 / 2,301 / 18,876 / 728 / 9,590 / -561 / Unqualified / Seoyoon CPA Audit Group (No. 370) Prior year: 22,362 / 2,875 / 19,488 / 728 / 16,856 / 3,070 / Unqualified / Seoyoon CPA Audit Group (No. 370) Year before that: 21,673 / 5,206 / 16,468 / 728 / 27,345 / 6,158 / Unqualified / Seoyoon CPA Audit Group (No. 370) The above summary financial status of the issuing company is prepared under generally accepted accounting standards for the current year (2025), prior year (2024), and year before that (2023).

[Matters Concerning the Counterparty] 1. Personal details - Basic information Name / Nationality / Address (head office) [disclosed only to the town/township/district level]: Kim OO, Chu OO, Kim OO, Ham OO, Lee OO, Kim OO, Kim OO, Kim OO, Chu OO, Chu OO -- all Republic of Korea Addresses: Jonam-dong, Siheung-si, Gyeonggi-do; Hwagok-dong, Gangseo-gu, Seoul; Hwagok-dong, Gangseo-gu, Seoul; Jonam-dong, Siheung-si, Gyeonggi-do; Guro-dong, Guro-gu, Seoul; Guro-dong, Guro-gu, Seoul; Woncheon-dong, Suwon-si, Gyeonggi-do; Beombak-dong, Bucheon-si, Gyeonggi-do; Madu-dong, Goyang-si, Gyeonggi-do; Naebalsan-dong, Gangseo-gu, Seoul Occupation (business details): CEO and others of the target company, etc. - Status and financials of the largest shareholder/CEO/representative executive officer (where the counterparty is a corporation) Category / Name / Shares / Equity ratio(%): Largest shareholder - / - / -; CEO - / - / - (Unit: KRW) Most recent fiscal year -; Fiscal year end -; Total assets -; Capital stock -; Total liabilities -; Revenue -; Total equity -; Net income (loss) -; External auditor -; Suspension of business -; Audit opinion -; Closure of business -

2. Relationship with the target company or its largest shareholder/officers - Relationship between the target company and the counterparty: - - Relationship between the target company's largest shareholder/officers and the counterparty: Name - ; Relationship with counterparty - (none listed)

3. Transactions in the most recent 3 years (excluding routine transactions) Category / Transaction details: Current year -; Prior year -; Year before that -