The company is a non-feeling entity. It is, not as. So if the CEO ran it based on christian principles, that would still not make it a christian business.
However, not to stir the pot, but what is being a christian, or catholic? He left his wife for another woman. At the time of his birth, he would have been raised in the catholic church. If he continued going to services, mass, or even considered himself a catholic is subject to debate.
However, the catholic church considers anyone baptized in it, or converted to, a catholic for life. PERIOD! But whether you consider yourself would be up to you.