Add additional field to registration page

The registration page for the site includes fields for:
username
email
password
first name
last name

However on the member profile page there are a lot more fields and one in particular that I need members to fill in, the Company Name.

Is there any easy way I can get this Company Name field onto the registration page please? I would also like to change the name and have it as Website Name if possible, although that wouldn’t be as critical.
Thanks