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Yahoo said chief operating officer Henrique de Castro will leave the company effective Thursday, but did not explain why he’s ankling.

In an 8-K filing with the SEC, the Internet media company said de Castro will receive the severance benefits as per his employment offer letter dated Oct. 15, 2012. He joined Yahoo in December 2012.

Yahoo CEO Marissa Mayer hired de Castro to be her right-hand man shortly after she took over in July 2012. Both execs hail from Google.

A Yahoo rep declined to provide additional info about de Castro’s departure.

At Google, de Castro led worldwide partner business solutions and prior to that oversaw Google’s media, mobile and platforms organization worldwide. Prior to Google, de Castro managed sales and business development operations across Western Europe for Dell and consulted for McKinsey & Co.