Only you will be able to view a saved list you created, but if you share your list, everyone from your organization will be able to view & edit your list.
Share my List
You and your colleagues will be able to edit the list (remove company(s), add company(s), update list title name, add notes, etc.) as necessary.
Go to the Lists tab on the navigation bar > click the 'share' icon to the right and your colleagues will have access to that specific list.
Once you've shared a list with your colleagues, the access column will update from 'private' to 'shared' letting you know that your list is now accessible for your colleagues to view.