Pro License

As long as all the companies are under a single Zoom account ( as associated domains or sub accounts), you can distribute your licenses between them. Here are some helpful links:

Sub account: https://support.zoom.us/hc/en-us/articles/8789157884173-Managing-Zoom-sub-account

Associated domains: https://support.zoom.us/hc/en-us/articles/203395207-Getting-started-with-associated-domains