Elon Musk is in talks with private-equity firm Thoma Bravo about partnering on a possible takeover bid for Twitter, two sources close to the situation said.

Thoma Bravo, a Chicago-based buyout firm that’s focused on the technology sector, could be the key to Musk moving forward with a binding offer for Twitter, sources said. That’s mainly because Musk — despite the fact he’s the richest person in the world, with an estimated net worth of $270 billion, according to Forbes — doesn’t want to foot the entire bill for the acquisition, the sources added.

For similar reasons, Thoma Bravo — a major name in private equity whose past investments have include software security giant McAfee — would likely move forward on a Twitter buyout with Musk or not at all, the sources said.

Read more: NY Post