FTX declared bankruptcy on Nov. 11, collapsing amid a wave of customer withdrawals. Federal prosecutors have charged founder Sam Bankman-Fried with stealing billions of dollars in FTX customer assets to plug losses at his hedge fund, Alameda Research, and two of his former associates have already pleaded guilty. Bankman-Fried is scheduled to be arraigned in New York on Thursday.

New York-based law firm Sullivan & Cromwell is representing FTX in its Chapter 11 case and guiding its efforts to return assets to customers. FTX late Wednesday asked the Delaware federal judge overseeing the case for approval to pay the firm's partners and special counsel between $1,575 and $2,165 per hour for their work.

The top lawyers' rates far exceed the $1,300 per hour billed by FTX's new CEO John Ray, who also filed an application with the court late Wednesday.

Court-approved billing rates for bankruptcy attorneys did not cross the $2,000-per-hour mark until earlier this year, when a U.S. bankruptcy judge approved a $2,035-per-hour fee in the bankruptcy of cosmetics giant Revlon.

Bankruptcy experts have said total legal fees in a case as complex as FTX can exceed $100 million.

Bankman-Fried criticized Sullivan & Cromwell in draft congressional testimony he planned to deliver before his Dec. 12 arrest, claiming he was pressured into filing for bankruptcy at least in part because the case would deliver large legal fees.

Sullivan & Cromwell did not immediately respond to a request for comment.

Before FTX's bankruptcy, Sullivan & Cromwell represented the company in U.S. regulatory inquiries and on potential acquisitions, including its proposed acquisition of bankrupt crypto lender Voyager Digital. The firm was paid $8.56 million for that pre-bankruptcy legal work.