The receiver for collapsed hedge fund Bayou Group is ramping up its efforts to recover—and equitably distribute—assets.

The hedge fund’s estate almost doubled the number of lawsuits it has filed against investors seeking the return of “fictitious profit investment gains,” with 47 new suits filed Friday in U.S. Bankruptcy Court in White Plains, N.Y.

Bayou collapsed in 2005 after regulators found that the firm had hid millions in losses from investors. As part of its effort to conceal the losses, Bayou became, in effect, a Ponzi scheme, sending false account statements to existing investors and paying them with money from new investors.

All told, Bayou defrauded investors of some $450 million. Two of its masterminds, former CFO Daniel Marino and co-founder James Marquez, have been sentenced to 20 years and more than four years in prison, respectively. Co-founder Samuel Israel will be sentenced in April.

Bayou has filed more than 100 lawsuits against investors in the hedge fund.