IMPERVA INC

CUSIP: 45321L100 Class: COM

STATE OF WISCONSIN INVESTMENT BOARD's Holding History (CIK: 0000854157)

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

Q4 2018
Shares 14,100 Value ($000) $785 Avg Close — Range —
Q3 2018
Shares 149,807 Value ($000) $6,959 Avg Close — Range —
Q2 2018
Shares 149,807 Value ($000) $7,228 Avg Close — Range —
Q1 2018
Shares 149,807 Value ($000) $6,487 Avg Close — Range —
Q4 2017
Shares 149,807 Value ($000) $5,947 Avg Close — Range —
Q3 2017
Shares 149,807 Value ($000) $6,502 Avg Close — Range —
Q2 2017
Shares 149,807 Value ($000) $7,168 Avg Close — Range —
Q1 2017
Shares 162,407 Value ($000) $6,667 Avg Close — Range —
Q4 2016
Shares 174,907 Value ($000) $6,716 Avg Close — Range —
Q3 2016
Shares 223,500 Value ($000) $12,004 Avg Close — Range —
Q2 2016
Shares 339,600 Value ($000) $14,606 Avg Close — Range —
Q1 2016
Shares 153,000 Value ($000) $7,726 Avg Close — Range —
Q4 2015
Shares 104,000 Value ($000) $6,584 Avg Close — Range —
Q3 2015
Shares 104,000 Value ($000) $6,810 Avg Close — Range —
Q2 2015
Shares 122,000 Value ($000) $8,259 Avg Close — Range —
Q1 2015
Shares 122,000 Value ($000) $5,209 Avg Close — Range —
Q4 2014
Shares 125,000 Value ($000) $6,179 Avg Close — Range —
Q3 2014
Shares 157,000 Value ($000) $4,511 Avg Close — Range —
Q2 2014
Shares 127,000 Value ($000) $3,325 Avg Close — Range —