He's a lawyer, he knows that he can't specifically say, "We're going after Musk's companies" because that would seem like he's targeting certain companies. He's saying that he's going after corruption, so if you're corrupt, be afraid. Source, I know a lot of lawyers.

“We’re not targeting particular corporations,” Raskin said. “We’re targeting systems and networks of corruption, and to the extent corporations are involved, they are subject to the oversight project of Congress and our subpoena authority like everyone else.”