| Symbol | Relationship | Date | Transaction | Cost | # Shares | Value($) | Total Shares | Form 4 |
| ATRC | Director | May 07, 2018 | Option Exercise | $9.30 | 10,000 | 93,000 | 29,967 | May 09, 2018, 09:00 AM |
| ATRC | Director | May 08, 2018 | Sale | $22.82 | 10,000 | 228,200 | 19,967 | May 09, 2018, 09:00 AM |
| ATRC | Director | Mar 12, 2018 | Option Exercise | $14.17 | 10,000 | 141,700 | 29,967 | Mar 14, 2018, 04:34 PM |
| ATRC | Director | Mar 13, 2018 | Sale | $20.00 | 10,000 | 200,000 | 19,967 | Mar 14, 2018, 04:34 PM |
| ATRC | Director | Aug 21, 2017 | Option Exercise | $8.04 | 10,000 | 80,400 | 29,967 | Aug 23, 2017, 09:08 AM |
| ATRC | Director | Aug 22, 2017 | Sale | $22.40 | 10,000 | 224,000 | 19,967 | Aug 23, 2017, 09:08 AM |
| ATRC | Director | May 16, 2017 | Option Exercise | $10.10 | 10,000 | 101,000 | 24,162 | May 17, 2017, 04:35 PM |
| ATRC | Director | May 17, 2017 | Sale | $21.44 | 10,000 | 214,400 | 14,162 | May 17, 2017, 04:35 PM |
| ATRC | Director | Nov 14, 2016 | Option Exercise | $9.50 | 10,000 | 95,000 | 24,162 | Nov 16, 2016, 04:20 PM |
| ATRC | Director | Nov 15, 2016 | Sale | $19.73 | 10,000 | 197,300 | 14,162 | Nov 16, 2016, 04:20 PM |
| ATRC | Director | Sep 12, 2016 | Option Exercise | $5.15 | 10,000 | 51,500 | 20,162 | Sep 14, 2016, 04:27 PM |
| ATRC | Director | Sep 13, 2016 | Sale | $15.93 | 6,000 | 95,580 | 14,162 | Sep 14, 2016, 04:27 PM |
| ATRC | Director | Aug 16, 2016 | Option Exercise | $2.58 | 8,000 | 20,640 | 15,162 | Aug 18, 2016, 04:22 PM |
| ATRC | Director | Aug 17, 2016 | Sale | $15.20 | 5,000 | 76,000 | 10,162 | Aug 18, 2016, 04:22 PM |
| ATRC | Director | Mar 07, 2016 | Option Exercise | $7.99 | 10,000 | 79,900 | 17,162 | Mar 09, 2016, 04:14 PM |
| ATRC | Director | Mar 08, 2016 | Sale | $16.91 | 10,000 | 169,100 | 7,162 | Mar 09, 2016, 04:14 PM |
| ATRC | Director | Dec 01, 2015 | Option Exercise | $7.99 | 10,000 | 79,900 | 17,162 | Dec 03, 2015, 04:36 PM |
| ATRC | Director | Dec 02, 2015 | Sale | $21.88 | 10,000 | 218,800 | 7,162 | Dec 03, 2015, 04:36 PM |
| ATRC | Director | Nov 10, 2015 | Option Exercise | $7.99 | 10,000 | 79,900 | 17,162 | Nov 12, 2015, 04:05 PM |
| ATRC | Director | Nov 11, 2015 | Sale | $20.68 | 10,000 | 206,800 | 7,162 | Nov 12, 2015, 04:05 PM |
| ATRC | Director | May 14, 2015 | Sale | $21.77 | 10,000 | 217,700 | 7,162 | May 18, 2015, 04:18 PM |
| ATRC | Director | May 11, 2015 | Option Exercise | $7.99 | 10,000 | 79,900 | 17,162 | May 13, 2015, 04:11 PM |
| ATRC | Director | Feb 26, 2015 | Option Exercise | $7.99 | 10,000 | 79,900 | 17,162 | Mar 02, 2015, 04:24 PM |
| ATRC | Director | Mar 02, 2015 | Sale | $17.63 | 10,000 | 176,255 | 7,162 | Mar 02, 2015, 04:24 PM |
| ATRC | Director | Mar 07, 2012 | Option Exercise | $2.58 | 1,000 | 2,580 | 7,162 | Mar 08, 2012, 01:43 PM |
| ATRC | Director | Jun 15, 2011 | Option Exercise | $2.58 | 1,000 | 2,580 | 6,162 | Jun 16, 2011, 05:07 PM |
| Symbol | Relationship | Date | Transaction | Value($) |
| ATRC | Director | May 07, 2018 | Option Exercise | 93,000 |
| ATRC | Director | May 08, 2018 | Sale | 228,200 |
| ATRC | Director | Mar 12, 2018 | Option Exercise | 141,700 |
| ATRC | Director | Mar 13, 2018 | Sale | 200,000 |
| ATRC | Director | Aug 21, 2017 | Option Exercise | 80,400 |
| ATRC | Director | Aug 22, 2017 | Sale | 224,000 |
| ATRC | Director | May 16, 2017 | Option Exercise | 101,000 |
| ATRC | Director | May 17, 2017 | Sale | 214,400 |
| ATRC | Director | Nov 14, 2016 | Option Exercise | 95,000 |
| ATRC | Director | Nov 15, 2016 | Sale | 197,300 |
| ATRC | Director | Sep 12, 2016 | Option Exercise | 51,500 |
| ATRC | Director | Sep 13, 2016 | Sale | 95,580 |
| ATRC | Director | Aug 16, 2016 | Option Exercise | 20,640 |
| ATRC | Director | Aug 17, 2016 | Sale | 76,000 |
| ATRC | Director | Mar 07, 2016 | Option Exercise | 79,900 |
| ATRC | Director | Mar 08, 2016 | Sale | 169,100 |
| ATRC | Director | Dec 01, 2015 | Option Exercise | 79,900 |
| ATRC | Director | Dec 02, 2015 | Sale | 218,800 |
| ATRC | Director | Nov 10, 2015 | Option Exercise | 79,900 |
| ATRC | Director | Nov 11, 2015 | Sale | 206,800 |
| ATRC | Director | May 14, 2015 | Sale | 217,700 |
| ATRC | Director | May 11, 2015 | Option Exercise | 79,900 |
| ATRC | Director | Feb 26, 2015 | Option Exercise | 79,900 |
| ATRC | Director | Mar 02, 2015 | Sale | 176,255 |
| ATRC | Director | Mar 07, 2012 | Option Exercise | 2,580 |
| ATRC | Director | Jun 15, 2011 | Option Exercise | 2,580 |