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Cortina Asset Management, LLC
> ATRC
| Date | Name | Ticker | Shares | Change | Value | Change | Price |
| 06/30/2019 | AtriCure, Inc. | ATRC | 320,660 | 32,411 | 9,568,000 | 1,846,000 | $29.84 |
| 03/31/2019 | AtriCure, Inc. | ATRC | 288,249 | -8,922 | 7,722,000 | -1,371,000 | $26.79 |
| 12/31/2018 | AtriCure, Inc. | ATRC | 297,171 | -76,632 | 9,093,000 | -4,001,000 | $30.60 |
| 09/30/2018 | AtriCure, Inc. | ATRC | 373,803 | -42,649 | 13,094,000 | 1,829,000 | $35.03 |
| 06/30/2018 | AtriCure, Inc. | ATRC | 416,452 | -7,658 | 11,265,000 | 2,562,000 | $27.05 |
| 03/31/2018 | AtriCure, Inc. | ATRC | 424,110 | -2,355 | 8,703,000 | 924,000 | $20.52 |
| 12/31/2017 | AtriCure, Inc. | ATRC | 426,465 | -13,607 | 7,779,000 | 7,769,156 | $18.24 |
| 09/30/2017 | AtriCure, Inc. | ATRC | 440,072 | 221,605 | 9,844 | -5,288,156 | $0.02 |
| 06/30/2017 | AtriCure, Inc. | ATRC | 218,467 | -404,216 | 5,298,000 | -6,888,000 | $24.25 |
| 12/31/2016 | AtriCure, Inc. | ATRC | 622,683 | -35,279 | 12,186,000 | 1,777,000 | $19.57 |
| 09/30/2016 | AtriCure, Inc. | ATRC | 657,962 | 58,794 | 10,409,000 | 1,943,000 | $15.82 |
| 06/30/2016 | AtriCure, Inc. | ATRC | 599,168 | -339,183 | 8,466,000 | -1,837,000 | $14.13 |
| 03/31/2016 | AtriCure, Inc. | ATRC | 670,702 | -267,649 | 11,288,000 | 985,000 | $16.83 |
| 12/31/2015 | AtriCure, Inc. | ATRC | 679,166 | -271,526 | 15,240,000 | -3,736,000 | $22.44 |
| 09/30/2015 | AtriCure, Inc. | ATRC | 643,688 | -278,260 | 14,103,000 | -4,788,000 | $21.91 |
| 06/30/2015 | AtriCure, Inc. | ATRC | 899,842 | -22,106 | 22,172,000 | 3,281,000 | $24.64 |
| 03/31/2015 | AtriCure, Inc. | ATRC | 921,948 | -28,744 | 18,891,000 | -85,000 | $20.49 |
| 12/31/2014 | AtriCure, Inc. | ATRC | 950,692 | -25,715 | 18,976,000 | 4,603,000 | $19.96 |
| 09/30/2014 | AtriCure, Inc. | ATRC | 976,407 | 4,634 | 14,373,000 | -3,488,000 | $14.72 |
| 06/30/2014 | AtriCure, Inc. | ATRC | 971,773 | -23,481 | 17,861,000 | -860,000 | $18.38 |
| 03/31/2014 | AtriCure, Inc. | ATRC | 995,254 | 138,213 | 18,721,000 | 2,711,000 | $18.81 |
| 12/31/2013 | AtriCure, Inc. | ATRC | 857,041 | -81,310 | 16,010,000 | 5,707,000 | $18.68 |
| 09/30/2013 | AtriCure, Inc. | ATRC | 938,351 | -166,518 | 10,303,000 | -193,000 | $10.98 |
| 06/30/2013 | AtriCure, Inc. | ATRC | 1,104,869 | 1,104,869 | 10,496,000 | 10,496,000 | $9.50 |
| 03/31/2013 | AtriCure, Inc. | ATRC | 745,986 | 745,986 | 5,908,000 | 5,908,000 | $7.92 |
| 09/30/2012 | AtriCure, Inc. | ATRC | 0 | -425,190 | 0 | -4,086,000 | |
| 06/30/2012 | AtriCure, Inc. | ATRC | 530,815 | 27,520 | 5,101,000 | 93,000 | $9.61 |
| 03/31/2012 | AtriCure, Inc. | ATRC | 503,295 | -17,671 | 5,008,000 | -775,000 | $9.95 |
| 12/31/2011 | AtriCure, Inc. | ATRC | 520,966 | 222,383 | 5,783,000 | 2,875,000 | $11.10 |
| 09/30/2011 | AtriCure, Inc. | ATRC | 298,583 | 88,731 | 2,908,000 | 201,000 | $9.74 |
| 06/30/2011 | AtriCure, Inc. | ATRC | 209,852 | 16,745 | 2,707,000 | 509,000 | $12.90 |
| 03/31/2011 | AtriCure, Inc. | ATRC | 193,107 | -98,893 | 2,198,000 | -801,000 | $11.38 |
| 12/31/2010 | AtriCure, Inc. | ATRC | 292,000 | 0 | 2,999,000 | 701,000 | $10.27 |
| 09/30/2010 | AtriCure, Inc. | ATRC | 292,000 | 292,000 | 2,298,000 | 2,298,000 | $7.87 |
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