There are two places where you can choose to add your company name and logo in an account-based storefront:
To the header in the storefront page layouts, using the Company Name and Company logo elements in the Header widget. See the Create page layouts for account-based storefronts section for more information.
To the email templates used to generate automated email notifications. See the Add company name and logo to account-based email templates section in Extending Oracle Commerce Cloud Service for details on how to do this.