ONYX PHARMACEUTICALS INC

CUSIP: 683399AB5 Class: CNV

WELLINGTON MANAGEMENT GROUP LLP's Holding History (CIK: 0000902219)

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

Q3 2013
Shares 140,000 Value ($000) $448 Avg Close — Range —
Q2 2013
Shares 465,000 Value ($000) $1,059 Avg Close — Range —