A company is controlled or shared by several companies, which is the parent company of the company? What are the other companies in this company?

Not necessarily the parent company of the company. The most basic feature of the parent company is not whether it holds the shares of the subsidiary, but whether it participates in the operation of the subsidiary.

Other companies and enterprises are best called affiliated enterprises.

According to our laws:

The parent company refers to a company that owns a certain number of shares in other companies or can control and dominate other companies' personnel, finance, business and other matters according to the agreement. Parent company (subsidiary): according to the different status of the company in the relationship between control and controlled, it can be divided into parent company and subsidiary company. The company that actually controls other companies is the parent company. The company actually controlled by other companies is a subsidiary. They all have legal personality.