KEY POINTS
  • MillerCoors sued Anheuser-Busch in March for its Super Bowl commercial that shamed Miller Lite and Coors Light for using corn syrup.
  • A judge sided with MillerCoors and barred Anheuser-Busch from using Bud Light packaging that says "no corn syrup."
  • In a court filing from Thursday, Anheuser-Busch now claims that a MillerCoors employee obtained its secret recipes immediately before and after the Super Bowl ad aired.

In the latest escalation of the legal battle between Anheuser-Busch InBev and MillerCoors, the Bud Light brewer is accusing its rival of stealing secret recipes for its beers, including Michelob Ultra and Bud Light.

MillerCoors, the U.S. subsidiary of Molson Coors, first filed a lawsuit against Anheuser-Busch in March after its rival aired a Super Bowl commercial that shamed Miller Lite and Coors Light for using corn syrup. In September, a federal judge issued a preliminary injunction against Anheuser-Busch, preventing the beer giant from using Bud Light packaging that says "no corn syrup." Anheuser-Busch is appealing the decision.