First trading date of VTC shares with changed listing registration

Dear Shareholders,

On September 22, 2026, VTC Telecommunications JSC received Notice No. 3961/TB-SGDHN dated September 22, 2026, from the Hanoi Stock Exchange regarding the first trading date of VTC Telecommunications JSC's shares with changed listing registration (Stock code: VTC).

Notice Excerpt

•  Security Name: Shares of VTC Telecommunications JSC
•  Security Type: Common share
•  Stock Code: VTC
•  Par Value: VND 10,000 / share
•  Form of Share Issuance: Issuance of shares for 2025 dividend payment
•  Number of Shares with Changed Listing Registration: 798,467 shares (Seven hundred ninety-eight thousand four hundred and sixty-seven shares)
•  Total Value of Shares with Changed Listing Registration (at par value): VND 7,984,670,000 (Seven billion nine hundred eighty-four million six hundred seventy thousand Vietnamese Dong)
•  Total Number of Listed Shares: 5,333,163 shares (Five million three hundred thirty-three thousand one hundred and sixty-three shares)
•  Total Value of Listed Shares (at par value): VND 53,331,630,000 (Fifty-three billion three hundred thirty-one million six hundred thirty thousand Vietnamese Dong)
•  Official Trading Date: Monday, September 28, 2026.

For further details, please refer to the attached file: NOTICE NO. 3961/TB-SGDHN

Sincerely./.