Private contacts only containing entries for form of address, first name and last name are listed in your contact overview due to contact links. If you find these contacts irritating in your contact overview and you would prefer only having the company contacts displayed, proceed as follows:
Open "Contacts", click "Detailed filter", select the "Company" option under "Contact type", press the "Save filter" button and assign the filter a name of your choice such as "Only companies".
You can now also define this customized filter ("Only companies") as your default view for contacts. To find out how, read the helpdesk's article "New feature - defining default tabs".