Wachtell, Lipton, Rosen & Katz is an American white-shoe law firm in New York City. Wachtell has only a single, Manhattan office, making it one of the smallest firms in the AmLaw 100. From Wikipedia
OpenAI has enlisted a high-profile legal team to defend against Elon Musk's lawsuit, calling his claims 'incoherent' and 'frivolous'.