IMPERVA INC

CUSIP: 45321L100 Class: COM

WESTFIELD CAPITAL MANAGEMENT CO LP's Holding History (CIK: 0001177719)

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

Q1 2016
Shares 1,115,883 Value ($000) $56,352 Avg Close — Range —
Q3 2013
Shares 416,910 Value ($000) $17,519 Avg Close — Range —