Subway’s $9.6B sale could face US antitrust heat — over its own strict competition rules: sources

Subway agreed to sell itself to Roark Capital for $9.6 billion last month .

The Atlanta -based buyout firm already owns Dunkin Brands , Arby's , Sonic Drive-In , Schlotzky 's and Jimmy John’s .

Subway 's franchise agreement defines a quick service restaurant that would be “competitive’ for Subway as being within three miles of one of its restaurants and deriving “ more than 20% of its total gross revenue”.