Three private equity firms have agreed to pay $325 million to settle a U.S. lawsuit accusing them of colluding with rivals to keep prices down on corporate takeovers prior to the financial crisis by agreeing not to outbid each other.

Other buyouts remaining in the case are movie theater chain AMC Entertainment Inc AMC.N, food service firm Aramark Corp ARMK.N, casino operator Harrah’s Entertainment Inc, pipeline operator Kinder Morgan Inc KMI.N, software maker SunGard Data Systems Inc and power company TXU Corp, now called Energy Future Holdings.

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