@arstechnica misleading title that implies there was a lawsuit was for $44 billion, as in, in damages, but that amount was actually what Musk paid to buy Twitter

"On May 13 he tweeted the deal was “temporarily on hold” unless the company could prove that “spam/fake accounts do indeed represent less than 5% of users.” The stock fell 9 percent when markets opened that day."

The tweet in question was in an attempt to manipulate Twitter's stock price, so he could buy it for cheaper