No reason for his departure from Yahoo has been given. Ms Mayer brought him in from Google when she was trying to build a strong management team of her own to revive Yahoo traffic and falling sales and Mr de Castro was a prized expert on internet advertising.
Yahoo is among the most visited web properties but its revenue has been in a slump in recent few year due to increased competition from Facebook and Google. Mr. Mayer is at the moment trying to turn fortunes around for Yahoo after building her team and bring the glory back to once number one destination on internet.
Mr. de Castro will also be getting severance benefits which include $20 million stock bonus and $40 million for his work of 15 months.