From all indications, De Castro's tenure at Yahoo was a rocky one. AdWeek reported in September the Yahoo COO was "feeling increasing pressure to deliver better ad results," as Yahoo continued to report weak display ad sales, and had failed to endear himself to Madison Ave execs.
De Castro, praised for his intelligence and criticized for his people skills by former Google co-workers, was given a compensation package that had a maximum 4-year value of $56M at the time it was provided.
The departure comes ahead of Yahoo's Jan. 28 Q4 report.
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