Treasury share disposal.

MATERIAL EVENT REPORT (TREASURY STOCK DISPOSITION DECISION)

Company Name: HYTC Co., Ltd. Representative Director: Kim Wook-hyun Headquarters: 9-14, Sanbon-ro 101beon-gil, Gunpo-si, Gyeonggi-do Telephone: 031-8068-8099 Website: http://www.hytc.kr Report Prepared By: Representative Director Kim Wook-hyun, Telephone: 031-8068-8099 Report Date: September 18, 2026

TREASURY STOCK DISPOSITION DECISION

1. Planned Disposition Shares (shares) - Common Stock: 25,000 - Other Stock: -

2. Disposition Target Stock Price (KRW) - Common Stock: 3,210 - Other Stock: -

3. Planned Disposition Amount (KRW) - Common Stock: 80,250,000 - Other Stock: -

4. Planned Disposition Period - Start Date: September 21, 2026 - End Date: October 16, 2026

5. Purpose of Disposition: Payment of bonuses to executives and employees

6. Disposition Method: Other (25,000 shares), Direct transfer from company treasury stock account to recipients' securities accounts

7. Disposition Counterparties: 120 company employees

8. Commissioned Investment Broker: Shinyoung Securities Co., Ltd.

9. Treasury Stock Holdings Before Disposition - Acquisition within distributable earnings range: Common Stock: 1,593,781 shares (15.7%) Other Stock: - - Other Acquisition: -

10. Holding and Disposition Plan - Shareholder Meeting Approval Date: March 27, 2026

11. Disposition Decision Date: September 18, 2026 - Independent (Outside) Directors in Attendance: 2 - Independent (Outside) Directors Absent: 0 - Audit Committee Member (non-independent) in Attendance: Yes

12. Daily Sale Order Quantity Limit - Common Stock: - - Other Stock: -

13. Other Matters for Investment Consideration - This treasury stock disposition decision was conducted within the "Treasury Stock Holding and Disposition Plan" approved at the company's regular shareholder meeting held on March 27, 2026. - Item "1. Planned Disposition Shares" states the maximum limit of disposition (up to 25,000 common shares) pursuant to board resolution. - Item "2. Disposition Target Stock Price" applies the closing price on the day before the board resolution date (September 17, 2026). - Item "3. Planned Disposition Amount" is calculated by multiplying the planned disposition shares by the disposition target stock price (based on the company's common stock market closing price on the day before the board resolution date). The actual disposition amount may vary depending on the disposition results. - Item "6. Disposition Method" is planned to be executed by direct transfer from the company's treasury stock account to the recipients' securities accounts. - The number of counterparties in Item "7. Disposition Counterparties" is based on the number of persons as of the public disclosure document preparation date (board resolution date) and may change as of the payment date. - Item "9. Treasury Stock Holdings Before Disposition" represents the actual settlement balance as of the public disclosure document preparation date (board resolution date) and includes shares that completed settlement on the resolution date. - Item "12. Daily Sale Order Quantity Limit" is not applicable as disposition is conducted through other methods.

TREASURY STOCK HOLDINGS BEFORE DISPOSITION DECISION (Unit: shares)

Acquisition Method | Stock Type | Opening Balance | Acquisition (+) | Disposition (-) | Cancellation (-) | Closing Balance | Remarks

Direct Acquisition within Distributable Earnings Range: - On-market direct acquisition: Common Stock, / Other Stock - Off-market direct acquisition: Common Stock, / Other Stock - Public tender offer: Common Stock, / Other Stock - Subtotal (a): Common Stock, / Other Stock

Acquisition by Trust Agreement: - Trustee holdings: Common Stock 1,140,628 / Other Stock - Physical holdings: Common Stock 453,153 / Other Stock - Subtotal (b): Common Stock 1,593,781 / Other Stock

Other Acquisition (c): Common Stock, / Other Stock

Total (a+b+c): Common Stock 1,593,781 / Other Stock

ADDITIONAL DISCLOSURE MATTERS

1. Relationship between Disposition Counterparties and the Company or Largest Shareholder - Company employees

2. Reason for Selection of Disposition Counterparties - Employees currently employed as of the stock payment date who meet the payment requirements

3. Disposition Shares by Counterparty (shares) - Total 120 persons (up to 25,000 common shares)

4. Basis for Price Calculation - Calculated based on the Korea Exchange closing price on the day before the board resolution date (September 17, 2026). - However, as this is a gratuitous distribution of shares as employee bonuses, the actual per-share disposition price will be finalized at the "closing price on the day before the stock distribution date," and the actual number of shares processed and disposition amount may vary depending on the payment recipients and stock price fluctuations.

5. Anticipated Dilution Effect on Stock Value - Item "1. Planned Disposition Shares" represents approximately 0.25% of the company's total issued shares (10,175,213 common shares), and the dilution effect on stock value is expected to be minimal.

6. Other Matters for Investment Consideration - Not applicable.