NSL: Notice of record date for a ballot

1. Issuer: Son La Water Supply Joint Stock Company
2. Stock code: NSL
3. Par value: VND10,000/share
4. Record date: 08/12/2025
5. Ex-date: 05/12/2025
6. Reason: for a ballot
      + Exercise rate: 1 share – 1 voting rights
      + Expected exercise date: 15/12/2025
      + Place: Son La Water Supply Joint Stock Company
      + Issue in the ballot: Seeking shareholders' approval for the Feasibility Study Report and the Investment Decision for the project: Construction of the Chieng Dong Water Treatment Plant and clean water transmission pipelines connecting Son La City and Mai Son District