PORTOLA PHARMACEUTICALS INC

CUSIP: 737010108 Class: COM

CASTLEARK MANAGEMENT LLC's Holding History (CIK: 0001106832)

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

Q4 2017
Shares 99,171 Value ($000) $4,828 Avg Close — Range —
Q3 2017
Shares 99,791 Value ($000) $5,392 Avg Close — Range —
Q2 2017
Shares 42,286 Value ($000) $2,375 Avg Close — Range —
Q1 2017
Shares 77,175 Value ($000) $3,024 Avg Close — Range —