3 sentences

1. 这家企业集团拥有数十家子公司。

   zhè jiā qǐ​yè​jí​tuán yōng​yǒu shù​shí jiā zǐ​gōng​sī.

   This business group owns dozens of subsidiaries.

   Source: Dong Chinese Dictionary

2. 这家母公司在海外设立了几家子公司。

   zhè jiā mǔ​gōng​sī zài hǎi​wài shè​lì le jǐ jiā zǐ​gōng​sī.

   The parent company has established several subsidiaries overseas.

   Source: Dong Chinese Dictionary

3. 这家子公司的重大决策必须报请总公司批准。

   zhè jiā zǐ​gōng​sī de zhòng​dà jué​cè bì​xū bào​qǐng zǒng​gōng​sī pī​zhǔn.

   Major decisions of this subsidiary must be submitted to the headquarters for approval.

   Source: Dong Chinese Dictionary