ONYX PHARMACEUTICALS INC

CUSIP: 683399109 Class: COM

RATIONAL ADVISORS LLC's Holding History (CIK: 0001143565)

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

Q1 2012
Shares 19,000 Value ($000) $716 Avg Close — Range —
Q4 2011
Shares 19,000 Value ($000) $835 Avg Close — Range —
Q3 2011
Shares 19,000 Value ($000) $570 Avg Close — Range —