However, a US bankruptcy court was told on Wednesday that the extent of losses to customers is still not known.
Mr Dietderich said that the recovered funds do not include assets seized by the Securities Commission of the Bahamas, where FTX was based and where Mr Bankman-Fried was living at the time of his arrest.
In December the 30-year-old was arrested in the Bahamas and extradited to the US. He has been accused of committing "one of the biggest financial frauds in US history."
FTX, which a year ago was valued at $32bn, filed for bankruptcy protection on 11 November. It has been estimated that $8bn of customer's funds was missing.
FTX co-founder Gary Wang and Caroline Ellison, the former head of Alameda, have also been charged over their alleged roles in the company's collapse. Authorities said they were both cooperating with the investigation.
In late December Mr Bankman-Fried was released from detention on $250m bail on condition that he does not leave his parents' home in California.
In an interview with BBC News before his arrest, he said: "I didn't knowingly commit fraud. I don't think I committed fraud. I didn't want any of this to happen. I was certainly not nearly as competent as I thought I was."
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