Possessives and Attributives

Q. How would this be punctuated correctly? “The AZ Group of Companies’, comprising ABC Machine Company, DEF Machine Company, and GHI Corporation, mission is to provide . . .” or “The AZ Group of Companies,’ comprising ABC Machine Company, DEF Machine Company, and GHI Corporation, mission is to provide . . .”? I’m writing a brochure and can’t find it anywhere online.

A. Forgive the bluntness, but you will never find this online, because no one would ever write it either way. Please rewrite it—there are many better ways. Here are two suggestions:

The mission of the AZ Group of Companies, comprising ABC, etc., is to provide . . .
The mission of the AZ Group of Companies (ABC, etc.) is to provide . . .