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TIAA CREF INVESTMENT MANAGEMENT LLC
> IMPV
| Date | Name | Ticker | Shares | Change | Value | Change | Price |
| 03/31/2019 | IMPERVA INC | IMPV | 0 | -193,135 | 0 | -10,756,000 | |
| 12/31/2018 | IMPERVA INC | IMPV | 193,135 | -48,533 | 10,756,000 | -469,000 | $55.69 |
| 09/30/2018 | IMPERVA INC | IMPV | 241,668 | -99,389 | 11,225,000 | -5,231,000 | $46.45 |
| 06/30/2018 | IMPERVA INC | IMPV | 341,057 | 26,128 | 16,456,000 | 2,820,000 | $48.25 |
| 03/31/2018 | IMPERVA INC | IMPV | 314,929 | 149,920 | 13,636,000 | 7,085,000 | $43.30 |
| 12/31/2017 | IMPERVA INC | IMPV | 165,009 | -28,412 | 6,551,000 | -1,843,000 | $39.70 |
| 09/30/2017 | IMPERVA INC | IMPV | 193,421 | 20,970 | 8,394,000 | 142,000 | $43.40 |
| 06/30/2017 | IMPERVA INC | IMPV | 172,451 | 32,388 | 8,252,000 | 2,502,000 | $47.85 |
| 03/31/2017 | IMPERVA INC | IMPV | 140,063 | -2,499 | 5,750,000 | 276,000 | $41.05 |
| 12/31/2016 | IMPERVA INC | IMPV | 142,562 | 12,869 | 5,474,000 | -1,492,000 | $38.40 |
| 09/30/2016 | IMPERVA INC | IMPV | 129,693 | 27,112 | 6,966,000 | 249,000 | $53.71 |
| 06/30/2016 | IMPERVA INC | IMPV | 131,911 | 1,773 | 5,673,000 | -899,000 | $43.01 |
| 03/31/2016 | IMPERVA INC | IMPV | 130,138 | 27,557 | 6,572,000 | -145,000 | $50.50 |
| 12/31/2015 | IMPERVA INC | IMPV | 129,394 | 26,813 | 8,192,000 | 1,475,000 | $63.31 |
| 09/30/2015 | IMPERVA INC | IMPV | 102,581 | 6,568 | 6,717,000 | 2,617,000 | $65.48 |
| 06/30/2015 | IMPERVA INC | IMPV | 105,000 | 8,987 | 7,109,000 | 3,009,000 | $67.70 |
| 03/31/2015 | IMPERVA INC | IMPV | 96,013 | -6,574 | 4,100,000 | 1,153,000 | $42.70 |
| 12/31/2014 | IMPERVA INC | IMPV | 89,879 | -12,708 | 4,443,000 | 1,496,000 | $49.43 |
| 09/30/2014 | IMPERVA INC | IMPV | 102,587 | 19,941 | 2,947,000 | -1,656,000 | $28.73 |
| 06/30/2014 | IMPERVA INC | IMPV | 126,128 | 43,482 | 3,302,000 | -1,301,000 | $26.18 |
| 03/31/2014 | IMPERVA INC | IMPV | 82,646 | -2,471 | 4,603,000 | 1,026,000 | $55.70 |
| 12/31/2013 | IMPERVA INC | IMPV | 83,946 | -1,171 | 4,040,000 | 463,000 | $48.13 |
| 09/30/2013 | IMPERVA INC | IMPV | 85,117 | 85,117 | 3,577,000 | 3,577,000 | $42.02 |
| 06/30/2013 | IMPERVA INC | IMPV | 84,970 | 40,192 | 3,827,000 | 2,415,000 | $45.04 |
| 03/31/2013 | IMPERVA INC | IMPV | 44,778 | 0 | 1,723,953 | 311,953 | $38.50 |
| 12/31/2012 | IMPERVA INC | IMPV | 44,778 | -600 | 1,412,000 | -267,000 | $31.53 |
| 09/30/2012 | IMPERVA INC | IMPV | 45,378 | -1,341 | 1,679,000 | 333,000 | $37.00 |
| 06/30/2012 | IMPERVA INC | IMPV | 46,719 | 7,662 | 1,346,000 | -183,000 | $28.81 |
| 03/31/2012 | IMPERVA INC | IMPV | 39,057 | 39,057 | 1,529,000 | 1,529,000 | $39.15 |
| 12/31/2011 | IMPERVA INC | IMPV | 26,057 | 26,057 | 907,000 | 907,000 | $34.81 |
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