What company do you work for?
Which company are you with?
Who do you represent?
I work for ABC Company.
I’m with ABC.
I represent (the) XYZ (company).
What is the name of your company?
Where are you located?
The name of our company is . . . .
Our company is located in . . . .
Our headquarters is in . . .
What (type of business) do you do?
What business are you in?
We are in the computer business.
We’re in computers
We sell . . .
We produce . . .
We manufacture . . .
Our major products are . . .
(originally published on eslgold.com)