By Christopher Weaver, John Carreyrou and Michael Siconolfi
Drugstore giant Walgreen Co. sued its former lab-testing partner Theranos Inc. in federal court in Delaware, alleging it breached a contract between the two companies, court records show.
The Walgreens Boots Alliance Inc. unit seeks $140 million in damages, the court records show. That amount represents what it invested in Theranos, according to people familiar with the situation.
Walgreens is alleging Theranos misled it about the state of its...