You can modify your registration data that appears on the pass by accessing the event registration web with your username and password. In the User data section you can modify, among others, your name, last name and company data.

Access Registered Users - Login: 

 Log in with your username and password, and access the User data section:

From there you can modify your data and press the Save profile button.

Once the data has been edited, access the My Purchases section and download your pass, which should contain the updated data.