ONYX PHARMACEUTICALS INC

CUSIP: 683399109 Class: COM

PRICE T ROWE ASSOCIATES INC /MD/'s Holding History (CIK: 0000080255)

Note: Option positions (PUT/CALL) are excluded.

Q3 2013
Shares 353,850 Value ($000) $44,114 Avg Close — Range —
Q2 2013
Shares 4,937,894 Value ($000) $428,708 Avg Close — Range —