VIROPHARMA INC

CUSIP: 928241108 Class: COMMON STOCK

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

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

Q4 2013
Shares 290,916 Value ($000) $14,502 Avg Close — Range —
Q3 2013
Shares 3,093,291 Value ($000) $121,443 Avg Close — Range —
Q2 2013
Shares 3,968,818 Value ($000) $113,707 Avg Close — Range —