Lawsuit by cryptocurrency exchange, which collapsed in November, is attempt to recoup assets sought by creditors.
The bankrupt cryptocurrency exchange FTX is suing its founder Sam Bankman-Fried and three other former executives for $1bn.
FTX collapsed in November and Bankman-Fried was arrested the following month in the Bahamas over allegations he stole customer funds and extradited to the US, where he has pleaded not guilty to charges of fraud and conspiracy to violate campaign finance laws and bribe Chinese authorities.
An executive team led by his successor as FTX chief executive, the restructuring expert John Ray, has instigated the new lawsuit, which takes aim at a litany of share awards, property purchases, cash transfers and other transactions that the company says should be reversed under US bankruptcy law.