To create a new Company, you will want to navigate to CRM–>Contacts–>Companies, and click the + button at the top of the “Manage Companies” table.
From there, you will be presented with a form which you can fill out with all of the new Company’s appropriate information, as well as assign associated Contacts. The only required field for this form is Company Name.
You can add as many or as few Contacts to a single Company as you like. If you don’t have any existing Contacts already created, you can “quick add” a Contact using "Add Contact" button under the “Choose Associated Contacts” field.