Sam Bankman-Fried's girlfriend and a co-founder of FTX have pled guilty to criminal fraud charges and are cooperating with feds

Sam Bankman-Fried's girlfriend Caroline Ellison and another co-founder of FTX pleaded guilty to criminal fraud charges related to the billion-dollar FTX cryptocurrency exchange, according to unsealed court documents.

The report on Friday came after Bankman-Fried was extradited from the Bahamas to the United States to face charges, including wire fraud and money laundering.

Bankman-Fried was lauded by many as a genius when he co-founded the massive cryptocurrency exchange FTX. He shrouded his actions by claiming that he was amassing billions in wealth in order to donate much of it to charity.

Ellison had been the CEO of Alameda Research, a privately-controlled hedge fund. Bankman-Fried is accused of illegally and covertly transferring billions from FTX to Alameda without properly notifying his investors. She pleaded guilty to seven counts, including conspiracy to commit commodities fraud, conspiracy to commit securities fraud, and conspiracy to commit money laundering.

Ellison faces a maximum sentence of 110 years in prison for the seven charges.

FTX co-founder Gary Wang pleaded guilty to four counts, including conspiracy to commit wire fraud, conspiracy to commit commodities fraud, and faces a maximum sentence of 50 years in prison.

Among the celebrities who have been caught in the web of the FTX collapse are NFL superstar quarterback Tom Brady, who is being sued by an investor for promoting the exchange in commercials.

At one point, Bankman-Fried was estimated to be worth $16 billion. He is expected to make his first court appearance on Thursday.

In an interview with the New York Times, Bankman-Fried claimed he never intended to defraud anyone but admitted that mistakes were made.

"Whatever happened, why it happened, I had a duty to our stakeholders, our customers, our investors, the regulators of the world, to do right by them," said Bankman-Fried. "Clearly I didn’t do a good job of that."

The financial fraud case is considered the largest in U.S. history.

Here's an explainer for the FTX collapse:

The FTX Collapse, Explained | What Went Wrong | WSJwww.youtube.com