Zillion $ Studios from Dun &Bradstreet

Who are the multi-million studios in the following locations:

Minneapolis MN - (Lifetouch a school photographer with 1000 employees??)
Charlotte NC
Chattanooga TN
St Louis MO

These studios are so huge that they distort the average sales statistics in their market areas.

Background: In putting together a business plan, I did some market research on D&B's Zapdata site. There you can pull off the following Industry Report for sic code 7221 "Photographic Studios - Portrait" There are 40,000 studios grossing just over $125,000 each in the USA. But there are 5 studios with over 500 employees grossing $200 million each. Who are these mega-studios?

For single click access for this discussion, I have cached this report (which you can get for free from zapdata.com) at the following location:

http://www.showntellphotos.com/DB_Portrait_Market.htm