Forced sale of securities pledged as collateral for margin loans by a customer who is an insider/a related person of an insider

NOTICE
(Re: Forced sale of securities pledged as collateral for margin loans by a customer
who is an insider/ a related person of an insider)

VIX Securities Joint Stock Company (“VIX/the Company”) hereby announces the forced sale of securities pledged as collateral for margin loans by an insider/ a related person of an insider, as follows:

1. Name: LEO REGULUS INVESTMENT JOINT STOCK COMPANY

Nationality: Vietnam.

2. Current position at the public company/ relationship with the public company: An entity related to an insider.

3. Ticker symbol for the proposed forced sale: KOS

4. Number of shares expected to be sold in the forced sale: 1,396,000 shares.

5. Expected forced sale period: From 29 October 2026 until the outstanding margin loan balance is fully recovered in accordance with VIX’s regulations.

Please note:

• The number of securities expected to be sold in the forced sale under item 4 is an estimate at the time of disclosure, and the actual number sold may be higher or lower as market price movements affect the value of the collateral.
• VIX may decide not to proceed with the forced sale without public notice if the market price of the collateral changes or the account holder provides additional collateral in accordance with margin trading regulations.

Respectfully./.