Earlier this month, Paramount Skydance completed its US$110 billion takeover of Warner Bros Discovery and the combined entity was named Skydance.
"It's going to be a great company," US President Trump told reporters earlier this month, expressing his approval of the merger.
SpaceX SPCX.O CEO Musk, who has been rebuilding his ties with Trump, has had a longstanding bond with Oracle co-founder Larry Ellison, whose son David Ellison leads Skydance.
The investment comes as Ellison looks to position Skydance as a technology-driven media business and cut costs.
Last month, Ellison named former Mattel MAT.O CEO Ynon Kreiz as Skydance's co-CEO.
Musk's commitment is part of a wider effort by Skydance to raise equity investments, according to Semafor, which first reported the news.
In 2022, Larry Ellison had committed US$1 billion to fund Musk's purchase of Twitter, now X.
"I'm very close friends with Elon Musk," senior Ellison had said in 2018.
Larry Ellison had also personally guaranteed over US$40 billion equity financing when Paramount offered to buy Warner Bros.