I have about 1100 usernames for our organization, they are in the cells like this:

|aanderson|
|bdarius|
|ceffrum|
|dbladenly|
and so on....

I want to add the rest of the email address to these for print, so:

|aanderson@company.com|
|bdarius@company.com|
|ceffrum@company.com|
|dbladenly@company.com|

how can I add "@company.com" to all these cells without going into each cell and typing it in?

Thanks.