HC1: Notice of record date for dividend payment in cash

1. Issuer: Hanoi Construction Joint Stock Company No.1
2. Stock code: HC1
3. Par value: VND10,000/share
4. Record date: 23/09/2026
5. Ex-date: 22/09/2026
6. Reason:
     * Dividend payment in cash:
          - Payment method: Cash dividend payment for 2025
          - Exercise rate: 10% per share (shareholder will receive VND1,000 for each share they own)
          - Exercise date: 23/10/2026
          - Place of payment:
               + For deposited shares: securities companies where shares of shareholders have been deposited.
               + For undeposited shares: Finance and Accounting Department of Hanoi Construction Joint Stock Company No.1 (13th Floor, Headquarters at 59 Quang Trung, Hai Ba Trung Ward, Hanoi City) on working days from 23/10/2026. Citizen Identification Card or Identification Card (original copy) is required.