Breaking: Jim Simons To Retire From Rentec At Year-End

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Jim Simons announced to employees today that he will retire from his role as CEO of Renaissance Technologies, a person familiar with firm has confirmed to Dealbreaker. Current co-presidents Peter Brown and Robert Mercer will be named co-CEO's as of January 1, 2010 (Simons will remain non-executive chairman). Simons will remain the largest shareholder at the fund and will keep "sizable investments in RIEF and RIFF."