SoftBank, Deutsche Telekom, T-Mobile Board Sued Over Sprint Deal

A T-Mobile US Inc. investor sued in Delaware, claiming its board conspired with Deutsche Telekom AG and SoftBank Group Corp. to force through its $26 billion Sprint merger without renegotiating after a missed deal deadline gave T-Mobile “extreme leverage.”

The heavily redacted derivative lawsuit, filed in Delaware Chancery Court, targets T-Mobile controlling stockholder Deutsche Telekom, former Sprint corporate parent SoftBank, and current and former members of T-Mobile’s board.

Deutsche Telekom, SoftBank, and T-Mobile didn’t immediately respond to requests for comment Monday.

The suit accuses the board of leaving the structure of the merger essentially intact, despite cosmetic changes, when it ...