IMPERVA INC

CUSIP: 45321L100 Class: COM

NORTHERN TRUST CORP's Holding History (CIK: 0000073124)

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

Q4 2018
Shares 411,238 Value ($000) $22,901 Avg Close — Range —
Q3 2018
Shares 447,045 Value ($000) $20,765 Avg Close — Range —
Q2 2018
Shares 433,433 Value ($000) $20,913 Avg Close — Range —
Q1 2018
Shares 414,209 Value ($000) $17,936 Avg Close — Range —
Q4 2017
Shares 416,795 Value ($000) $16,548 Avg Close — Range —
Q3 2017
Shares 419,293 Value ($000) $18,197 Avg Close — Range —
Q2 2017
Shares 435,986 Value ($000) $20,861 Avg Close — Range —
Q1 2017
Shares 395,208 Value ($000) $16,223 Avg Close — Range —
Q4 2016
Shares 388,920 Value ($000) $14,934 Avg Close — Range —
Q3 2016
Shares 386,292 Value ($000) $20,748 Avg Close — Range —
Q2 2016
Shares 386,648 Value ($000) $16,630 Avg Close — Range —
Q1 2016
Shares 365,797 Value ($000) $18,700 Avg Close — Range —
Q4 2015
Shares 355,860 Value ($000) $22,530 Avg Close — Range —
Q3 2015
Shares 356,440 Value ($000) $23,340 Avg Close — Range —
Q2 2015
Shares 322,604 Value ($000) $21,841 Avg Close — Range —
Q1 2015
Shares 310,896 Value ($000) $13,275 Avg Close — Range —
Q4 2014
Shares 297,260 Value ($000) $14,693 Avg Close — Range —
Q3 2014
Shares 328,778 Value ($000) $9,446 Avg Close — Range —
Q2 2014
Shares 315,000 Value ($000) $8,247 Avg Close — Range —
Q1 2014
Shares 300,560 Value ($000) $16,742 Avg Close — Range —
Q4 2013
Shares 318,402 Value ($000) $15,324 Avg Close — Range —
Q3 2013
Shares 307,392 Value ($000) $12,917 Avg Close — Range —
Q2 2013
Shares 203,164 Value ($000) $9,151 Avg Close — Range —