Walgreens has sued its former partner, blood-testing startup Theranos Inc., alleging breach of contract.
The unit of Walgreens Boots Alliance Inc. is seeking $140 million, the amount it invested in Theranos, according to The Wall Street Journal.
The lawsuit was filed under seal in U.S. District Court for the District of Delaware. A spokesman for Deerfield, Illinois-based Walgreens declined to comment Tuesday beyond confirming the lawsuit had been filed.
Theranos raised millions of dollars by pitching its technology as a cheaper, faster way to run blood tests. But the companies' yearslong partnership unraveled after questions were raised about the reliability of Theranos'...