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ESSEX INVESTMENT MANAGEMENT CO LLC
> CGNX
| Date | Name | Ticker | Shares | Change | Value | Change | Price |
| 06/30/2023 | COGNEX CORP | CGNX | 134,898 | -2,323 | 7,556,986,000 | 757,685,000 | $56,020.00 |
| 03/31/2023 | COGNEX CORP | CGNX | 137,221 | -4,166 | 6,799,301,000 | 6,792,640,000 | $49,550.00 |
| 12/31/2022 | COGNEX CORP | CGNX | 141,387 | -3,413 | 6,661,000 | 659,000 | $47.11 |
| 09/30/2022 | COGNEX CORP | CGNX | 144,800 | 33,805 | 6,002,000 | 1,282,000 | $41.45 |
| 06/30/2022 | COGNEX CORP | CGNX | 110,995 | 12,580 | 4,720,000 | -2,873,000 | $42.52 |
| 03/31/2022 | COGNEX CORP | CGNX | 98,415 | 1,900 | 7,593,000 | 88,000 | $77.15 |
| 12/31/2021 | COGNEX CORP | CGNX | 96,515 | 14,646 | 7,505,000 | 937,000 | $77.76 |
| 09/30/2021 | COGNEX CORP | CGNX | 81,869 | 94 | 6,568,000 | -305,000 | $80.23 |
| 06/30/2021 | COGNEX CORP | CGNX | 81,775 | -3,020 | 6,873,000 | 65,000 | $84.05 |
| 12/31/2020 | COGNEX CORP | CGNX | 84,795 | -5,407 | 6,808,000 | 936,000 | $80.29 |
| 09/30/2020 | COGNEX CORP | CGNX | 90,202 | 12,985 | 5,872,000 | 1,261,000 | $65.10 |
| 06/30/2020 | COGNEX CORP | CGNX | 77,217 | 11,857 | 4,611,000 | 1,852,000 | $59.71 |
| 03/31/2020 | COGNEX CORP | CGNX | 65,360 | -1,070 | 2,759,000 | -964,000 | $42.21 |
| 12/31/2019 | COGNEX CORP | CGNX | 66,430 | 60,717 | 3,723,000 | 3,442,000 | $56.04 |
| 09/30/2019 | COGNEX CORP | CGNX | 5,713 | -14,598 | 281,000 | -694,000 | $49.19 |
| 06/30/2019 | COGNEX CORP | CGNX | 20,311 | -27,152 | 975,000 | -1,439,000 | $48.00 |
| 03/31/2019 | COGNEX CORP | CGNX | 47,463 | -5,475 | 2,414,000 | 367,000 | $50.86 |
| 12/31/2018 | COGNEX CORP | CGNX | 52,938 | 33,001 | 2,047,000 | 934,000 | $38.67 |
| 09/30/2018 | COGNEX CORP | CGNX | 19,937 | -17,538 | 1,113,000 | -559,000 | $55.83 |
| 06/30/2018 | COGNEX CORP | CGNX | 37,475 | -160,176 | 1,672,000 | -8,604,000 | $44.62 |
| 03/31/2018 | COGNEX CORP | CGNX | 197,651 | -19,059 | 10,276,000 | -2,978,000 | $51.99 |
| 12/31/2017 | COGNEX CORP | CGNX | 216,710 | 104,389 | 13,254,000 | 867,000 | $61.16 |
| 09/30/2017 | COGNEX CORP | CGNX | 112,321 | -2,583 | 12,387,000 | 2,632,000 | $110.28 |
| 06/30/2017 | COGNEX CORP | CGNX | 114,904 | -3,238 | 9,755,000 | -163,000 | $84.90 |
| 03/31/2017 | COGNEX CORP | CGNX | 118,142 | 36,552 | 9,918,000 | 4,727,000 | $83.95 |
| 12/31/2016 | COGNEX CORP | CGNX | 81,590 | 32,051 | 5,191,000 | 2,572,000 | $63.62 |
| 09/30/2016 | COGNEX CORP | CGNX | 49,539 | -23 | 2,619,000 | 483,000 | $52.87 |
| 06/30/2016 | COGNEX CORP | CGNX | 49,562 | 14,100 | 2,136,000 | 1,512,578 | $43.10 |
| 03/31/2016 | COGNEX CORP | CGNX | 52,261 | 16,799 | 2,036,000 | 1,412,578 | $38.96 |
| 12/31/2015 | COGNEX CORP | CGNX | 53,844 | 18,382 | 1,818,000 | 1,194,578 | $33.76 |
| 06/30/2010 | COGNEX CORP | CGNX | 35,462 | -387,373 | 623,422 | -7,900,932 | $17.58 |
| 09/30/2008 | COGNEX CORP | CGNX | 422,835 | -33,461 | 8,524,354 | -1,993,269 | $20.16 |
| 06/30/2008 | COGNEX CORP | CGNX | 456,296 | 456,296 | 10,517,623 | 10,517,623 | $23.05 |
| 03/31/2007 | COGNEX CORP | CGNX | 0 | -9,000 | 0 | -270,630 | |
| 09/30/2005 | COGNEX CORP | CGNX | 9,000 | -425,425 | 270,630 | -16,446,044 | $30.07 |
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