ONYX PHARMACEUTICALS INC

CUSIP: 683399109 Class: COM

Palo Alto Investors LP's Holding History (CIK: 0001306923)

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

Q3 2013
Shares 343,473 Value ($000) $42,831 Avg Close — Range —
Q2 2013
Shares 1,325,115 Value ($000) $115,046 Avg Close — Range —