Four former Twitter executives sued Elon Musk on Monday, claiming the billionaire owes them more than $128 million in unpaid severance after he fired them over email shortly after he took over the social media giant.

The suit was filed by former Twitter chief executive Parag Agrawal, former chief financial officer Ned Segal, former head of legal and policy Vijaya Gadde and former general counsel Sean Edgett. The executives, fired after Musks 2022 takeover, say they were entitled to severance due to clauses in their contracts. (Twitter was later renamed X.)

The amounts include a years salary and stock options, but the group claims Musk fired them without reason, then made up fake cause and appointed employees of his various companies to uphold his decision.

According to Agrawals offer letter, obtained by The New York Times , he was entitled to a severance payment of more than $57 million. Segal was entitled to more than $44 million in benefits and Gadde more than $20 million. Edgett was also entitled to nearly $7 million, according to the suit.