- Constructing civil, industrial, transportation, irrigation works and technical infrastructure.

- Constructing and installing electric lines and electricity substations.

- Producing construction materials.

- Real estate.

- Others under the business license.

- On Dec 8, 1971: Song Da No. 25 Joint Stock Company, formerly known as Thanh Hoa Industrial Construction and Installation Company, was established;

- On Sep 9, 1977: Renamed as Thanh Hoa Construction No.2 Company;

- On Jan 7, 1999: Thanh Hoa Construction C Company was merged into Thanh Hoa Construction No.2 Company;

- On Jun 25, 2001: Quang Yen - Thanh Hoa Brick and Tile Enterprise was merged into Thanh Hoa Construction No.2 Company;

- In 2005: Renamed as Song Da No.25 Company;

- On Dec 13, 2005: Changed to Song Da No. 25 Joint Stock Company;

- On Dec 25, 2007: Company's stock was listed on the HNX;

- On May 21, 2013: Company's stock was delisted from the HNX;

- On Dec 2, 2014: Company's stock was approved to list on the Upcom;