Mayer confirms de Castro was fired, will split up responsibilities

|By:, SA News Editor

In a company memo, Marissa Mayer (YHOO) states she "made the difficult decision" that COO Henrique de Castro "should leave the company."

Mayer also indicates many of De Castro's responsibilities will be handed off to other execs. Four ad sales/regional operations execs, including recently-hired Americas ad chief Ned Brody, will report directly to Mayer. CMO Kathy Savitt will be in charge of "media and editorial functions," and "several functions in the COO org" will be given to homepages/verticals chief Mike Kerns.

Kara Swisher reports De Castro had been "fighting for power" with Brody, Savitt, and M&A chief Jackie Reses, and had "developed a tense relationship" with Mayer.

YHOO -1.4% premarket. The timing of de Castro's firing is naturally raising concerns about Yahoo's Q4 ad performance, particularly given the share losses the company has seen in prior quarters.

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