- Manufacturing and installing construction equipment.

- Maintaining and repairing motor vehicles.

- Operating, repairing factory electric system equipment, electric lines and substations.

- Producing and trading oxygen.

- Other activities under the business license.

- November 15, 2005: Formerly a member of the Song Da Corporation established under the Decision No. 2125 / QD-BXD of the Minister of Construction with an initial charter capital of VND 10 billion.;

- December 14, 2006: Officially traded on Hanoi Stock Exchange (HNX);

- November 2007: Increased charter capital to VND40 billion.

- May 2008: Renamed as Song Da Someco Joint Stock Company;

- April 2010: Increased charter capital to VND77,350 billion.

- March 2014: Increased charter capital to VND77,350 billion.

- May 2015: Renamed as Song Da Mechanical Assembiling Joint Stock Company.

- December 2016: Increased charter capital to VND83,536 billion.

- May 26, 2020: Delisted from Hanoi Stock Exchange (HNX).

- June 02, 2020: Traded on the UPCOM market.