Official letter from HNX dated april 14, 2026 on the first trading date of ESOP 2025 shares

Hai Duong Pump Manufacturing Joint Stock Company (HAPUMA) respectfully discloses the following information:

On April 20, 2026, the Company received an official letter from the Hanoi Stock Exchange (HNX), dated April 14, 2026, regarding the first trading date of the additional listed shares arising from the change in listing registration, following the 2025 ESOP share issuance.

Official trading date: Wednesday, January 24, 2029.

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