"People will always, always be in the market for a story that resonated with them. Your Products will either have this quality or it wont't. If your Product fails this test, quit your job and go find something else. Just making the product incrementally cheaper or better won't help you." - Hugh MacLeod
Sharing does not mean that everyone has access to all the information in the organization. A web based ERP system softwareis controlled by restrictions and access rights. So you have full control and decide on "who-sees-what" and "who-does-what".
Using a web based ERP System software you can run your multiple businesses on the same software. You can consolidate results of your multiple entities and at the same time you can achieve drill down to the transaction level from a consolidated figure. This makes it easy for the Group level senior management to view the results of individual companies as well as the Group as a whole.