- 1961: Hai Phong Electrification Factory was established by merging 3 small partnership companies
- 1992: Established Hai Phong Electrical Mechanical Factory, a State-owned enterprise
- 2004: Converted into Hai Phong Electrical Mechanical Joint Stock Company with the charter capital of VND6.5 billion
- 2008: Raised the charter capital to VND8.4 billion by issuing shares to existing shareholders
- 2010: Raised the charter capital to VND16.9 billion by paying stock dividend
- 2012: Raised the charter capital to VND33.8 billion by paying stock dividend (June)
- 2012: Raised the charter capital to VND94.9 billion through private placement (August)
- 2013: Officially listed on Hanoi Stock Exchange (HNX).