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UNITRONTEK / Execution of Stock Pledge Agreement Accompanied by Change of Largest Shareholder / (2026.09.18) Correction Notice (Report) on Execution of Stock Pledge Agreement Accompanied by Change of Largest Shareholder

Correction Date: 2026-09-18

1. Public Disclosure Document Subject to Correction Execution of Stock Pledge Agreement Accompanied by Change of Largest Shareholder

2. Submission Date of Public Disclosure Document Subject to Correction 2026-03-23

3. Reason for Correction - Extension of stock pledge loan contract period

4. Corrected Items Item | Before Correction | After Correction Security Interest Setting Contract Execution Date (Current Matter) | 2025-09-16 | 2026-09-18

[Matters Regarding Individual Pledge Provision Contracts] Sequence Numbers 2, 3 - End Date: 2026-09-21 → 2027-03-17

[Matters Regarding Individual Pledge Provision Contracts] Sequence Number 2 - Contract Execution Date: 2025-09-26 → 2026-09-18

[Matters Regarding Individual Pledge Provision Contracts] Sequence Number 3 - Contract Execution Date: 2025-10-13 → 2026-09-18

Execution of Stock Pledge Agreement Accompanied by Change of Largest Shareholder

1. Matters Regarding Pledge Provider (Largest Shareholder) - Name (Individual Name, Corporate Name, Partnership Name, Organization Name): Nam Gung Seon - Number of Shares Owned as of Disclosure Date: 3,057,503 shares - Shareholding Ratio (%): 14.73% - Number of Shares Owned Upon Full Execution of Security Interest: 768,003 shares - Shareholding Ratio (%): 3.70%

2. Total Debt (Borrowing) Amount Total (KRW): 4,500,000,000

3. Total Security Interest Setting Amount Total (KRW): 6,000,000,000

4. Details of Pledge Provision - Cumulative Number of Pledge Provision Contracts: 3 - Total Number of Cumulative Pledge Provision Shares: 2,289,500 shares

5. Security Interest Setting Contract Execution Date (Current Matter) 2026-09-18

6. Other Matters for Reference in Investment Decision - Upon full execution of the security interest, the largest shareholder will change to Hyundai Enterprise Co., Ltd. - Hyundai Enterprise Co., Ltd. has executed a stock purchase agreement with the largest shareholder. Please refer to the relevant public disclosure regarding this matter. - The contract execution dates in the "Matters Regarding Individual Pledge Provision Contracts" below refer to the dates of new or extended stock pledge contract execution.

※ Related Public Disclosures: 2025-06-27 Major Management Matters Related to Investment Decision (Stock Purchase Agreement Containing Option Conditions Accompanied by Change of Largest Shareholder) 2025-09-16 Execution of Stock Pledge Agreement Accompanied by Change of Largest Shareholder 2025-09-26 Execution of Stock Pledge Agreement Accompanied by Change of Largest Shareholder 2025-10-13 Execution of Stock Pledge Agreement Accompanied by Change of Largest Shareholder 2026-01-22 Execution of Stock Pledge Agreement Accompanied by Change of Largest Shareholder 2026-02-20 Execution of Stock Pledge Agreement Accompanied by Change of Largest Shareholder 2026-03-23 Execution of Stock Pledge Agreement Accompanied by Change of Largest Shareholder

[Matters Regarding Individual Pledge Provision Contracts]

Sequence | Creditor (Security Interest Holder) | Debtor | Purpose of Borrowing | Security Interest Setting Amount (KRW) | Type of Security Interest | Number of Pledged Shares | Mandatory Holding Requirement | Pledge Provision Period (Start Date - End Date) | Contract Execution Date 1 | NH Nonghyup Bank | Nam Gung Seon | Personal Funds | 3,000,000,000 | Abbreviated Pledge | 1,650,000 | Not Applicable | 2020-09-29 - 2026-09-29 | 2025-09-16 2 | NH Investment & Securities | Nam Gung Seon | Personal Funds | 1,500,000,000 | Abbreviated Pledge | 318,472 | Not Applicable | 2025-09-26 - 2027-03-17 | 2026-09-18 3 | NH Investment & Securities | Nam Gung Seon | Personal Funds | 1,500,000,000 | Abbreviated Pledge | 321,028 | Not Applicable | 2025-10-13 - 2027-03-17 | 2026-09-18

[Security Interest Execution Conditions for Individual Pledge Provision Contracts]

Sequence | Security Interest Execution Conditions (Including Special Provisions) 1 | In case of default of debt or breach of agreement 2 | In case of default of debt or breach of agreement 3 | In case of default of debt or breach of agreement

[Matters Regarding Debtor]

1. Personal Information - Basic Information Name (Corporate Name) | Nationality | Address (Principal Place of Business) [Up to Eup/Myeon/Dong] | Date of Birth (Business Registration Number, etc.) Nam Gung Seon | Republic of Korea | Samseong-ro, Gangnam-gu, Seoul | 650314

Occupation (Business Content): Representative Director of UNITRONTEK Co., Ltd.

- Status of Largest Shareholder, Representative Director, and Representative Executive Officer and Financial Condition (If Debtor is a Corporation) Classification | Name | Number of Shares | Shareholding Ratio (%) Representative Director | - | - | - Largest Shareholder | - | - | -

(Unit: Million KRW) Fiscal Year | - | Closing Date | - | Total Assets | - | Capital | - | Total Liabilities | - | Sales | - | Total Capital | - | Net Income for the Period | - | External Auditor | - | Suspension of Business | No | Audit Opinion | - | Closure of Business | No

2. Relationship with the Listed Company or Largest Shareholder, etc. - Relationship between Debtor and the Listed Company: Largest Shareholder - Relationship between Debtor and the Company's Largest Shareholder and Officers Name | Relationship with Debtor Nam Gung Seon | Self

3. Transaction History with the Listed Company Over the Past Three Years (Excluding Routine Transactions) Classification | Name (Corporate Name) | Current Year | - | Previous Year | - | Year Before Previous | -