A lawsuit filed by the Federal Trade Commission alleges that food and beverage maker PepsiCo engaged in illegal price discrimination by giving unfair price advantages to one big-box retailer.

Outgoing agency Chair Lina Khan has filed a raft of measures during her last week in office.

Uncle Sam is always watching, even if you’re a major brand like Pepsi or Walmart. The Federal Trade Commission, or what we will call FTC from here on, has filed a major lawsuit against Pepsi for colluding with Walmart to keep prices lower at Walmart stores than any other stores.

The U.S. Federal Trade Commission sued PepsiCo on Friday for offering preferential pricing to a large retailer, whom a source familiar with the matter confirmed was Walmart .