Musk Sued by Twitter Investor Over Busted $44 Billion Deal (1)

A Twitter Inc. shareholder hit Elon Musk with a proposed class action, effectively joining the tech giant’s bid to block the world’s richest man from backing out of his pledge to pay $44 billion to acquire the influential social networking platform.

The lawsuit was filed in Delaware Chancery Court—the same forum that’s set to hold a fast-tracked trial in October of Twitter’s claims against Musk—by an investor who holds 5,500 Twitter shares. In addition to Musk, it names as defendants two “corporate acquisition entities” related to the deal.

The suit, docketed July 29, targets Musk’s “lame rationales for reneging on ...