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CORRECTION NOTICE REGARDING EXECUTION OF STOCK PURCHASE AGREEMENT ACCOMPANIED BY CHANGE OF LARGEST SHAREHOLDER

Correction Date: 2026-09-18

1. CORRECTED PUBLIC DISCLOSURE DOCUMENT Execution of Stock Purchase Agreement Accompanied by Change of Largest Shareholder

2. ORIGINAL DISCLOSURE SUBMISSION DATE August 6, 2026

3. REASON FOR CORRECTION Correction of entries due to change in transaction completion date

4. CORRECTED ITEMS Item: Payment Schedule for Stock Transfer Consideration Before Correction: Final Payment: 17,603,832,500 won (2026.09.18) After Correction: Final Payment: 17,603,832,500 won (2026.09.23)

Item: Scheduled Date of Change of Largest Shareholder Before Correction: 2026-09-18 After Correction: 2026-09-23

Item: Address of Scheduled New Largest Shareholder (Corporate) Before Correction: Seoul, Seongsu-gu, Seongsu-dong After Correction: Seoul, Seongdong-gu, Seongsu-dong

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EXECUTION OF STOCK PURCHASE AGREEMENT ACCOMPANIED BY CHANGE OF LARGEST SHAREHOLDER

1. CONTRACTING PARTIES Sellers: Yoo Chang-soo and 3 others (Previous largest shareholder and related parties) Buyers: KBN Holdings Co., Ltd. and 3 others

2. CONTRACT DETAILS Number of Shares to be Transferred: 8,801,533 shares Price per Share: 2,500 won Total Consideration: 22,003,832,500 won

Contract Execution Date: August 6, 2026 Total Transfer Amount: 22,003,832,500 won

3. CONTRACTING PARTIES BREAKDOWN Sellers: - Yoo Chang-soo: 8,451,533 shares / 61.66% / 21,128,832,500 won - Jung Hye-jin: 300,000 shares / 2.19% / 750,000,000 won - Yoo Ji-in: 25,000 shares / 0.18% / 62,500,000 won - Yoo Ji-hu: 25,000 shares / 0.18% / 62,500,000 won

Buyers: - KBN Holdings Co., Ltd.: 2,601,533 shares / 18.98% / 6,503,832,500 won - Sun Asset Investment Partnership No. 1: 2,200,000 shares / 16.05% / 5,500,000,000 won - Kairos Investment Partnership No. 1: 2,000,000 shares / 14.59% / 5,000,000,000 won - Interface Holdings Investment Partnership No. 1: 2,000,000 shares / 14.59% / 5,000,000,000 won

Total Shares to be Transferred: 8,801,533 shares / 64.21% / 22,003,832,500 won

4. PAYMENT SCHEDULE ① Contract Deposit: 4,400,000,000 won (August 6, 2026) ② Final Payment: 17,603,832,500 won (September 23, 2026)

5. MATTERS REGARDING TRANSFER OF MANAGEMENT CONTROL ① Following execution of this contract, directors designated by the buyers shall be appointed at an extraordinary shareholders' meeting to be convened, whereby management control of the company shall be transferred. ② Upon payment of the final consideration under this contract, the transferred shares and ancillary rights shall be transferred to the buyers.

6. MANDATORY HOLDING REQUIREMENT FOR TRANSFERRED SHARES No

3. SCHEDULED NEW LARGEST SHAREHOLDER KBN Holdings Co., Ltd.

Scheduled Date of Change: September 23, 2026 Scheduled Number of Shares Owned: 2,601,533 shares Scheduled Ownership Ratio: 18.98%

4. CONTRACT DATE August 6, 2026

5. OTHER MATTERS FOR INVESTMENT CONSIDERATION 1. The above number of shares to be transferred (8,801,533 shares) and ownership ratio (64.21%) are calculated based on the company's total issued shares of 13,707,500 shares as of the disclosure date.

2. The above scheduled date of change is the scheduled final payment date under this stock purchase agreement.

3. The schedule and detailed conditions under this contract may be changed depending on consultations between the contracting parties and the progress of related procedures. In the event of material changes, the company shall provide notice through relevant disclosures.

4. Upon completion of the stock transfer and confirmation of the change of largest shareholder, the company shall proceed with relevant disclosures.

DETAILED CHANGES

Name (Corporate Name, Partnership Name, Other Organization Name) | Relationship | Before Change (Shares / Ownership Ratio %) | After Change (Shares / Ownership Ratio %) | Remarks

Yoo Chang-soo | Previous Largest Shareholder | 8,451,533 / 61.66 | - / - | - Jung Hye-jin | Related Party of Previous Largest Shareholder | 300,000 / 2.19 | - / - | - Yoo Ji-in | Related Party of Previous Largest Shareholder | 25,000 / 0.18 | - / - | - Yoo Ji-hu | Related Party of Previous Largest Shareholder | 25,000 / 0.18 | - / - | - KBN Holdings Co., Ltd. | Scheduled New Largest Shareholder | - / - | 2,601,533 / 18.98 | -

MATTERS REGARDING SCHEDULED NEW LARGEST SHAREHOLDER (CORPORATE)

1. Corporate Name: KBN Holdings Co., Ltd. 2. Establishment Date: February 2020 3. Nationality: Republic of Korea 4. Address (Principal Place of Business) [Up to Eup/Myeon/Dong Level]: Seoul, Seongdong-gu, Seongsu-dong 5. Largest Shareholder of the Corporation: Park Mi-ran Ownership Ratio: 40% 6. Representative Director: Park Mi-ran 7. Principal Business: Corporate investment, acquisition, financing 8. Major Financial Information (Unit: Million won) Fiscal Year: 2025 (Closing Date: December 31) Total Assets: 3,590 Capital: 50 Total Liabilities: 4,431 Sales: 300 Total Capital: -841 Net Income (Loss) for the Period: 103 External Auditor: - Business Suspension: No Audit Opinion: - Business Closure: No

9. Relationship between the Listed Company and the Scheduled New Largest Shareholder (Corporate): [Not specified in the filing]