The controlling shareholder was Chinese state-owned mega-conglomerate China Aerospace Science and Technology Corporation (CASC).

[1] China Energine engages in wind power and telecommunication equipment manufacturing business.

As of 31 December 2007[update], CASC, via China Academy of Launch Vehicle Technology and its BVI subsidiary, "Astrotech Group Limited", owned 73.10% shares of the listed company.

The brand Castel was retained by the Hong Kong-incorporated subsidiary "China Aerospace Telecommunications Limited" (Chinese: 中國航天科技通信有限公司).

[5] As of 31 December 2016[update], China Energine major shareholder was Astrotech Group Limited for 60.64%, which was a subsidiary of China Academy of Launch Vehicle Technology, in turn a wholly owned subsidiary of China Aerospace Science and Technology Corporation, in turn a wholly owned subsidiary of the State-owned Assets Supervision and Administration Commission of the State Council.