You can set up a company name in the proofing settings. The company name is used for your website title, comment labels, send favorites options, as well as the footer of your proofing events. By default, the company name is the same as the company name on your account, however you can edit it separately.
From the proofing control panel, click on settings. Enter the name in the company name field.
Then click save changes (scroll to bottom of the page).