Washington Mutual Inc. said Friday that David Bonderman, founding partner of private-equity firm TPG, will resign from the company's board.

Bonderman gained the seat following a TPG-led $7 billion infusion at the Seattle-based company in April.

According to a regulatory filing, Bonderman's resignation will take effect at the close of business Friday.

Washington Mutual filed for Chapter 11 bankruptcy after its thrift was seized by regulators and was sold to JPMorgan Chase & Co.  in late September.

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