ONYX PHARMACEUTICALS INC

CUSIP: 683399109 Class: COM

GROUP ONE TRADING, L.P.'s Holding History (CIK: 0000932540)

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

Q3 2013
Shares 119,408 Value ($000) $14,887 Avg Close — Range —
Q2 2013
Shares 303 Value ($000) $26 Avg Close — Range —