- Investing, trading real estate, and leasing buildings and offices.

- Trading tourism, hotel and restaurant services.

- January 1994: Tuoi Tre Limited Company was established;

- 10 October 1997: Transformed into Century 21 Joint Stock Company with an initial charter capital of VND12 billion;

- 2007: Charter capital was raised up to VND100 billion;

- 2009: Charter capital was raised up to VND137.12 billion;

- 2010: Charter capital was raised up to VND193.36 billion;

- 15 July 2011: Listed on Ho Chi Minh Stock Exchange (HOSE) with a Ticker-C21;

- 18 September 2015: Delisted voluntarily from Ho Chi Minh Stock Exchange (HOSE);

- 01 November 2016: Started to be transacted on UPCOM market;