IMPERVA INC

CUSIP: 45321L100 Class: COM

BLAIR WILLIAM & CO/IL's Holding History (CIK: 0000902367)

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

Q4 2016
Shares 19,159 Value ($000) $736 Avg Close — Range —
Q3 2016
Shares 20,509 Value ($000) $1,102 Avg Close — Range —
Q2 2016
Shares 22,349 Value ($000) $961 Avg Close — Range —
Q1 2016
Shares 93,011 Value ($000) $4,696 Avg Close — Range —
Q4 2015
Shares 68,923 Value ($000) $4,363 Avg Close — Range —
Q3 2015
Shares 79,263 Value ($000) $5,190 Avg Close — Range —
Q2 2015
Shares 89,513 Value ($000) $6,059 Avg Close — Range —
Q1 2015
Shares 93,828 Value ($000) $4,006 Avg Close — Range —
Q4 2014
Shares 79,551 Value ($000) $3,932 Avg Close — Range —
Q3 2014
Shares 89,366 Value ($000) $2,567 Avg Close — Range —
Q2 2014
Shares 47,825 Value ($000) $1,252 Avg Close — Range —
Q1 2014
Shares 203,187 Value ($000) $11,317 Avg Close — Range —
Q4 2013
Shares 195,115 Value ($000) $9,390 Avg Close — Range —
Q3 2013
Shares 6,300 Value ($000) $264 Avg Close — Range —