04-12-2017 03:06 AM
While this option is available for contacts, it is not for the companies and would be required to change one by one or to be made private.
If in the future companies created would be using an Access list I could recommend the 'record Creation Options' from 'Tools - Preferences - Startup'
04-19-2017 06:35 AM
There is an addon that will do this.
https://www.keystroke.ca/apps/our-act-plugins Company/Group Limited Access (Extended Edition)