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Material Event Report (Paid-in Capital Increase Decision) Correction Notice for Sambo Industrial Co., Ltd. September 17, 2026

1. Corrected Public Disclosure Document: Material Event Report (Paid-in Capital Increase Decision)

2. Original Submission Date of Corrected Document: June 12, 2026

3. Correction Details:

Item | Reason for Correction | Before Correction | After Correction 9. Payment Date | Regarding the paid-in capital increase by third-party allocation of in-kind contribution resolved by the Board of Directors, the court approval procedure for in-kind contribution under Article 422 of the Commercial Act has been delayed | June 12, 2026 | October 15, 2026 11. Expected Date of Share Certificate Delivery | | September 28, 2026 | October 28, 2026 12. Expected Listing Date of New Shares | | September 29, 2026 | October 29, 2026

Material Event Report / Exchange Notification Obligation Financial Services Commission / Korea Exchange June 12, 2026

Company Name: Sambo Industrial Co., Ltd. Representative Directors: Lee Tae-yong, Choi Jae-hun Headquarters Address: 36 Namui-ro 21-gil, Jinhae-gu, Changwon-si, Gyeongnam Province Telephone: 055-552-7130 Website: http://www.samboind.kr Document Preparer: (Title) Representative Director (Name) Choi Jae-hun (Telephone) 055-552-7130

Paid-in Capital Increase Decision

1. Type and Number of New Shares Common Stock: 860,000 shares Other Stock: -

2. Par Value per Share (KRW): 500

3. Total Issued Shares Before Capital Increase Common Stock: 3,494,609 shares Other Stock: -

4. Purpose of Fund Raising Facility Funds (KRW): - Business Acquisition Funds (KRW): - Operating Funds (KRW): - Debt Repayment Funds (KRW): - Securities Acquisition Funds of Other Entities (KRW): 2,786,407,624 Other Funds (KRW): -

5. Method of Capital Increase: Third-Party Allocation

Regarding Other Stock: Articles of Incorporation Basis: Article 10; New Share Subscription Rights: Stock Content,; Other: -

6. Issuance Price of New Shares Common Stock (KRW): 3,240 Other Stock (KRW): -

7. Benchmark Stock Price Common Stock (KRW): 2,945 Other Stock (KRW): -

7-1. Benchmark Stock Price Calculation Method: Simple average of [weighted arithmetic average stock price over the past one month, one week, and most recent day, with the base date being the day before the Board of Directors resolution date; and the most recent day weighted arithmetic average stock price]

7-2. Discount Rate or Premium Rate for Benchmark Stock Price (%): 10

7-3. Basis for Discount Rate (Premium Rate) Calculation: Article 5-18, Paragraphs 1 and 2 of the "Regulations on Issuance and Disclosure of Securities"

8. Articles of Incorporation Basis for Third-Party Allocation: Article 10, Paragraph 2, Item 5 of the Articles of Incorporation

9. Payment Date: October 15, 2026

10. Dividend Base Date of New Shares: January 1, 2026

11. Expected Date of Share Certificate Delivery: October 28, 2026

12. Expected Listing Date of New Shares: October 29, 2026

13. Whether Reverse Listing Due to In-Kind Contribution Applies: No Whether In-Kind Contribution Exists: Yes Whether Unlisted Company Shares Exist Among In-Kind Contribution Assets: Yes In-Kind Contribution Amount of Shares to be Paid In: 2,786,407,624 KRW Ratio to Total Assets of Company's Most Recent Business Year (%): 0.86 Number of Shares to be Paid In: 285,142

14. Compliance with Reverse Listing Requirements: Not Applicable

15. Board of Directors Resolution Date (Decision Date): June 12, 2026 Attendance of Independent (Outside) Directors: Attended (1 person), Did Not Attend (, ) Attendance of Auditor (Audit Committee): Attended

16. Whether Subject to Securities Registration Statement Submission: No

17. Reason for Exemption from Submission: Lock-up (Transfer Restriction) for One Year from Deposit Date

18. Whether Short Selling Transaction Period Prohibiting Subscription Applies: No Start Date:; End Date: -

19. Whether Subject to Fair Trade Commission Notification: Not Applicable

20. Other Matters for Reference in Investment Decision:

1) Sambo Industrial Co., Ltd. (hereinafter "the Company") shall receive in-kind contribution of 285,142 registered common shares of C-Max Communications Co., Ltd. (par value: 500 KRW per share) held by Lee Tae-yong, a related party, and in return shall allocate 860,000 registered common shares of the Company to Lee Tae-yong, the in-kind contributor, through third-party allocation method.

2) The "4. Purpose of Fund Raising, Securities Acquisition Funds of Other Entities (KRW)" above is the valuation amount according to the unlisted share valuation report of accounting firm Gonggam for the in-kind contribution amount.

※ The in-kind contribution amount may be changed depending on the court's review results for this in-kind contribution, and accordingly, the number of Company shares to be granted as consideration for the in-kind contribution may also be changed.

3) Regarding Lock-up: The Company, as an investment environment improvement stock, has a six-month lock-up obligation for new share issuance. However, this paid-in capital increase is a private placement with full one-year lock-up planned, and the six-month lock-up obligation is included in this period.

4) The issuance price of new shares is calculated in accordance with Article 5-18, Paragraph 2 of the "Regulations on Issuance and Disclosure of Securities." The benchmark stock price is determined as the lower of: (i) the simple average of the weighted arithmetic average stock price over the past one month, one week, and most recent day (with the base date being the day before the Board of Directors resolution date), and (ii) the most recent day weighted arithmetic average stock price. A 10% premium is applied.

5) The total assets in "13. Whether Reverse Listing Due to In-Kind Contribution Applies, In-Kind Contribution Amount of Shares to be Paid In, Ratio to Total Assets of Company's Most Recent Business Year (%)" are figures from the Company's consolidated financial statements as of December 31, 2025 (the end of the most recent business year) under K-IFRS (1.69% on a separate basis).

6) As a result of this in-kind contribution paid-in capital increase, the Company shall acquire registered common shares of C-Max Communications Co., Ltd. The changes are as follows:

Company's Shareholding in C-Max Communications Co., Ltd. Before Acquisition: 784,000 shares, Ownership Ratio: 27.5% After Acquisition: 1,069,142 shares, Ownership Ratio: 37.5%

7) The details regarding this in-kind contribution and the resulting new share issuance (including the in-kind contribution amount, number of new shares issued, schedule changes, etc.) may be changed depending on the court's review and approval of this in-kind contribution, subsequent schedules, and coordination with relevant authorities.

8) Other detailed matters regarding new share issuance are delegated to the Representative Director.

Benchmark Stock Price Calculation Table (Unit: Shares, KRW):

Category | Trading Volume | Trading Amount | Weighted Arithmetic Average Stock Price Weighted Arithmetic Average Stock Price over Past One Month (A) | 8,810,249 | 5,869,250,385 | 666.2 Weighted Arithmetic Average Stock Price over Past One Week (B) | 3,920,746 | 2,365,717,142 | 603.4 Most Recent Day Weighted Arithmetic Average Stock Price (C) | 310,123 | 182,674,323 | 589.0 Simple Arithmetic Average of (A), (B), (C) (D) | | | 619.5 Benchmark Stock Price: Lower of (C) and (D) | | | 589.0 Discount or Premium Rate (%) | | | 10 Issuance Price | | | 648

* Fractions less than the quotation unit are rounded up in issuance price calculation. * Following the effectiveness of a stock consolidation (5:1 consolidation, par value 100 KRW → 500 KRW) to be resolved at an extraordinary shareholders' meeting on July 27, 2026, the issuance price is changed to 3,240 KRW (5 times the existing issuance price).

【Basis, Purpose, etc. of Third-Party Allocation】

Articles of Incorporation Provision Serving as Basis for Third-Party Allocation: Article 10 (New Share Subscription Rights)

Purpose of Third-Party Allocation Capital Increase: Improvement of Financial Structure and Expansion of Direct Control Shareholding

Article 10 (New Share Subscription Rights) ① Shareholders have the right to be allocated new shares in proportion to the number of shares they own. ② Notwithstanding the provision of Paragraph 1, the Company may, by Board of Directors resolution, allocate new shares to persons other than shareholders in any of the following cases:

1. When issuing new shares through general public offering method in accordance with Article 165-6 of the "Capital Markets and Financial Investment Business Act" within a range not exceeding 20% of total issued shares 2. When issuing new shares due to exercise of stock purchase options under Article 542-3 of the "Commercial Act" 3. When preferentially allocating shares to employee stock association members within 20% of total issued shares 4. When issuing new shares due to exercise of employee stock purchase options under Article 39 of the "Labor Standards Act" 5. When issuing new shares to specific persons (including shareholders of this company) such as domestic and foreign financial institutions or institutional investors for urgent fund raising not exceeding 20% of total issued shares 6. When issuing new shares to the counterparty for important technology introduction, research and development, production, sales, or capital alliance in business, within a range not exceeding 20% of total issued shares

③ When issuing new shares pursuant to any of the provisions in Paragraph 2, the type, number, and issuance price of shares to be issued shall be determined by Board of Directors resolution.

④ The handling method for fractional shares arising from abandonment or loss of new share subscription rights and new share allocation shall be determined by Board of Directors resolution.

⑤ When allocating new shares to persons other than shareholders pursuant to Paragraph 2, the Company shall notify or announce to shareholders the matters specified in Article 416, Items 1, 2, 2-2, 3, and 4 of the "Commercial Act" at least two weeks before the payment date. However, the Company may substitute such notification and announcement by publicly disclosing a Material Event Report to the Financial Services Commission and the Exchange in accordance with Article 165-9 of the "Capital Markets and Financial Investment Business Act."

【Specific Use of Funds Raised by Third-Party Allocation】

【For Operating Funds and Other Funds】(Unit: Million KRW)

Fund Use | Details | Planned Use Amount by Year | Total | | 2026 | 2027 | 2028 and Later | Other Funds | Improvement of financial structure and expansion of direct control shareholding through capital expansion with no cash outflow via in-kind contribution method |, |, |, |

【Selection Process, Transaction Details, Allocation Details, etc. by Third-Party Allocation Recipient】

Third-Party Allocation Recipient | Relationship with Company or Largest Shareholder | Selection Process | Transaction Details and Plans Within 6 Months Before and After Capital Increase Decision | Number of Allocated Shares (Shares) | Remarks Lee Tae-yong | Largest Shareholder (Self) | Selected as in-kind contribution recipient by Board of Directors in consideration of achievement of company management objectives, etc. | Acquired 1,086,957 new shares through third-party allocation paid-in capital increase in April 2026 | 860,000 |