Amgen Chairman and Chief Executive Kevin Sharer saw his compensation rise 4 percent in 2008 to just under $13.8 million as the company’s stock recovered from safety issues over its anemia drugs and were bolstered by a possible osteoporosis treatment.

Sharer’s base salary was $1.56 million — roughly $21,400 per week — and he earned $3.88 million in performance bonuses during the year, according to a proxy statement filed with the Securities and Exchange Commission. While those are increases over 2007, his other compensation fell 41 percent to $530,697 as the company cut costs.

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