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| Latest Insider Trading | Top Insider Trading Recent Week | Top 10% Owner Trading Recent Week | Filter
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| Ticker | Owner | Relationship | Date | Transaction | Cost  |
#Shares | Value ($) | #Shares Total | SEC Form 4 |
|---|---|---|---|---|---|---|---|---|---|
| ALTR | Scapa James Ralph | Chief Executive Officer | Mar 18 | Sale | 80.74 | 10,000 | 807,424 | 0 | Mar 19 05:34 PM |
| ALTR | Scapa James Ralph | Chief Executive Officer | Mar 13 | Sale | 81.66 | 1,686 | 137,678 | 98,605 | Mar 14 04:02 PM |
| ALTR | Scapa James Ralph | Chief Executive Officer | Mar 13 | Sale | 81.66 | 93 | 7,594 | 1,202 | Mar 14 04:02 PM |
| ALTR | Scapa James Ralph | Chief Executive Officer | Mar 04 | Sale | 85.32 | 3,300 | 281,556 | 100,291 | Mar 05 02:34 PM |
| ALTR | Scapa James Ralph | Chief Executive Officer | Feb 16 | Sale | 91.07 | 10,000 | 910,688 | 0 | Feb 20 08:13 AM |
| ALTR | Scapa James Ralph | Chief Executive Officer | Jan 16 | Sale | 83.73 | 10,000 | 837,312 | 0 | Jan 18 06:01 PM |
| ALTR | Scapa James Ralph | Chief Executive Officer | Dec 18 | Sale | 74.12 | 10,000 | 741,150 | 0 | Dec 19 07:08 PM |
| ALTR | Scapa James Ralph | Chief Executive Officer | Nov 16 | Sale | 72.52 | 10,000 | 725,218 | 0 | Nov 17 04:22 PM |
| ALTR | Scapa James Ralph | Chief Executive Officer | Oct 16 | Sale | 65.23 | 10,000 | 652,339 | 0 | Oct 17 03:15 PM |
| ALTR | Scapa James Ralph | Chief Executive Officer | Sep 18 | Sale | 65.29 | 10,000 | 652,900 | 0 | Sep 19 08:04 PM |
| ALTR | Scapa James Ralph | Chief Executive Officer | Aug 16 | Sale | 62.47 | 10,000 | 624,650 | 0 | Aug 17 12:00 PM |
| ALTR | Scapa James Ralph | Chief Executive Officer | Jul 17 | Sale | 74.91 | 10,000 | 749,117 | 0 | Jul 18 11:05 AM |
| ALTR | Scapa James Ralph | Chief Executive Officer | Jun 16 | Sale | 75.18 | 10,000 | 751,752 | 0 | Jun 20 10:48 AM |
| ALTR | Scapa James Ralph | Chief Executive Officer | Jun 06 | Sale | 74.30 | 9,267 | 688,557 | 103,591 | Jun 07 12:40 PM |
| ALTR | Scapa James Ralph | Chief Executive Officer | May 16 | Sale | 67.94 | 10,000 | 679,430 | 0 | May 17 02:06 PM |
| ALTR | Scapa James Ralph | Chief Executive Officer | May 12 | Sale | 67.40 | 548 | 36,935 | 112,858 | May 15 06:31 PM |
| ALTR | Scapa James Ralph | Chief Executive Officer | May 10 | Sale | 67.82 | 5,358 | 363,380 | 113,406 | May 11 10:47 AM |
| ALTR | Scapa James Ralph | Chief Executive Officer | Apr 17 | Sale | 70.33 | 10,000 | 703,294 | 0 | Apr 18 03:50 PM |
| ALTR | Scapa James Ralph | Chief Executive Officer | Mar 16 | Sale | 64.97 | 1,784 | 115,906 | 118,764 | Mar 17 02:22 PM |
| ALTR | Scapa James Ralph | Chief Executive Officer | Mar 16 | Sale | 64.97 | 109 | 7,081 | 1,295 | Mar 17 02:22 PM |
| ALTR | Scapa James Ralph | Chief Executive Officer | Mar 15 | Sale | 66.16 | 35,000 | 2,315,661 | 0 | Mar 16 09:24 AM |
| ALTR | Scapa James Ralph | Chief Executive Officer | Mar 13 | Sale | 62.49 | 1,414 | 88,362 | 120,548 | Mar 15 04:42 PM |
| ALTR | Scapa James Ralph | Chief Executive Officer | Mar 13 | Sale | 62.49 | 91 | 5,687 | 1,404 | Mar 15 04:42 PM |
| ALTR | Scapa James Ralph | Chief Executive Officer | Feb 15 | Sale | 57.70 | 35,000 | 2,019,332 | 0 | Feb 16 01:32 PM |
| ALTR | Scapa James Ralph | Chief Executive Officer | Jan 17 | Sale | 49.91 | 35,000 | 1,746,675 | 0 | Jan 19 02:48 PM |
| ALTR | Scapa James Ralph | Chief Executive Officer | Jan 09 | Sale | 48.45 | 35,000 | 1,695,777 | 0 | Jan 10 04:43 PM |
| ALTR | Scapa James Ralph | Chief Executive Officer | Nov 15 | Sale | 49.97 | 57,915 | 2,894,128 | 103,224 | Nov 17 09:41 AM |
| ALTR | Scapa James Ralph | Chief Executive Officer | Nov 16 | Sale | 49.52 | 19,262 | 953,893 | 83,962 | Nov 17 09:41 AM |
| ALTR | Scapa James Ralph | Chief Executive Officer | May 12 | Sale | 49.31 | 2,520 | 124,254 | 161,139 | May 13 09:36 AM |
| ALTR | Scapa James Ralph | Chief Executive Officer | Mar 16 | Option Exercise | 0.00 | 19,305 | 0 | 138,029 | Mar 18 04:35 PM |
| ALTR | Scapa James Ralph | Chief Executive Officer | Mar 16 | Sale | 58.50 | 1,760 | 102,958 | 136,269 | Mar 18 04:35 PM |
| ALTR | Scapa James Ralph | Chief Executive Officer | Mar 16 | Sale | 58.49 | 107 | 6,259 | 1,495 | Mar 18 04:35 PM |
| ALTR | Scapa James Ralph | Chief Executive Officer | Mar 17 | Sale | 24.61 | 85 | 2,092 | 1,776 | Mar 18 04:35 PM |
| ALTR | Scapa James Ralph | Chief Executive Officer | Mar 12 | Sale | 59.50 | 81 | 4,820 | 1,695 | Mar 18 04:35 PM |
| ALTR | Scapa James Ralph | Chief Executive Officer | Mar 16 | Sale | 60.42 | 84 | 5,075 | 1,694 | Mar 18 04:35 PM |
| ALTR | Scapa James Ralph | Chief Executive Officer | Mar 14 | Sale | 59.96 | 92 | 5,516 | 1,602 | Mar 18 04:35 PM |
| ALTR | Scapa James Ralph | Chief Executive Officer | Mar 14 | Sale | 59.96 | 1,406 | 84,302 | 118,724 | Mar 16 12:47 PM |
| ALTR | Scapa James Ralph | Chief Executive Officer | Mar 07 | Sale | 64.55 | 1,791 | 115,609 | 120,130 | Mar 09 08:08 PM |
| ALTR | Scapa James Ralph | Chief Executive Officer | Mar 09 | Sale | 28.83 | 2,369 | 68,296 | 36,322 | Feb 02 01:12 PM |
| ALTR | Scapa James Ralph | Chief Executive Officer | Dec 15 | Sale | 71.34 | 42,809 | 3,053,785 | 0 | Dec 17 10:56 AM |
| ALTR | Scapa James Ralph | Chief Executive Officer | Nov 17 | Sale | 78.27 | 18,727 | 1,465,746 | 0 | Nov 19 01:43 PM |
| ALTR | Scapa James Ralph | Chief Executive Officer | Nov 15 | Sale | 77.75 | 14,498 | 1,127,290 | 0 | Nov 17 12:06 PM |
| ALTR | Scapa James Ralph | Chief Executive Officer | Nov 16 | Sale | 79.12 | 15,174 | 1,200,595 | 0 | Nov 17 12:06 PM |
| ALTR | Scapa James Ralph | Chief Executive Officer | Oct 19 | Sale | 74.13 | 21,031 | 1,558,976 | 0 | Oct 21 09:51 AM |
| ALTR | Scapa James Ralph | Chief Executive Officer | Oct 15 | Sale | 73.46 | 23,616 | 1,734,768 | 0 | Oct 19 11:03 AM |
| ALTR | Scapa James Ralph | Chief Executive Officer | Oct 18 | Sale | 73.66 | 25,353 | 1,867,457 | 0 | Oct 19 11:03 AM |
| ALTR | Scapa James Ralph | Chief Executive Officer | Sep 17 | Sale | 74.67 | 36,722 | 2,742,129 | 0 | Sep 20 10:42 AM |
| ALTR | Scapa James Ralph | Chief Executive Officer | Sep 15 | Sale | 75.41 | 16,382 | 1,235,306 | 0 | Sep 17 02:15 PM |
| ALTR | Scapa James Ralph | Chief Executive Officer | Sep 16 | Sale | 75.10 | 16,896 | 1,268,920 | 0 | Sep 17 02:15 PM |
| ALTR | Scapa James Ralph | Chief Executive Officer | Aug 18 | Sale | 70.93 | 23,628 | 1,676,049 | 0 | Aug 19 10:13 AM |
| ALTR | Scapa James Ralph | Chief Executive Officer | Aug 16 | Sale | 72.12 | 33,434 | 2,411,230 | 0 | Aug 18 10:58 AM |
| ALTR | Scapa James Ralph | Chief Executive Officer | Aug 17 | Sale | 71.11 | 12,938 | 920,004 | 0 | Aug 18 10:58 AM |
| ALTR | Scapa James Ralph | Chief Executive Officer | Jul 19 | Sale | 64.97 | 15,922 | 1,034,513 | 0 | Jul 20 02:40 PM |
| ALTR | Scapa James Ralph | Chief Executive Officer | Jul 15 | Sale | 66.02 | 26,003 | 1,716,808 | 0 | Jul 19 11:34 AM |
| ALTR | Scapa James Ralph | Chief Executive Officer | Jul 16 | Sale | 65.22 | 28,075 | 1,830,948 | 0 | Jul 19 11:34 AM |
| ALTR | Scapa James Ralph | Chief Executive Officer | Jun 17 | Sale | 62.99 | 19,933 | 1,255,655 | 0 | Jun 21 08:41 AM |
| ALTR | Scapa James Ralph | Chief Executive Officer | Jun 15 | Sale | 64.97 | 19,709 | 1,280,422 | 0 | Jun 17 01:44 PM |
| ALTR | Scapa James Ralph | Chief Executive Officer | Jun 16 | Sale | 63.44 | 30,358 | 1,926,013 | 0 | Jun 17 01:44 PM |
| ALTR | Scapa James Ralph | Chief Executive Officer | May 19 | Sale | 61.16 | 19,110 | 1,168,719 | 0 | May 20 09:38 AM |
| ALTR | Scapa James Ralph | Chief Executive Officer | May 17 | Sale | 65.09 | 17,930 | 1,166,986 | 0 | May 19 04:57 PM |
| ALTR | Scapa James Ralph | Chief Executive Officer | May 18 | Sale | 64.47 | 32,960 | 2,124,877 | 0 | May 19 04:57 PM |
| ALTR | Scapa James Ralph | Chief Executive Officer | May 12 | Sale | 64.33 | 2,230 | 143,467 | 119,290 | May 13 09:15 AM |
| ALTR | Scapa James Ralph | Chief Executive Officer | Apr 15 | Sale | 63.17 | 70,000 | 4,421,730 | 0 | Apr 16 01:29 PM |
| ALTR | Scapa James Ralph | Chief Executive Officer | Mar 17 | Sale | 60.25 | 11,008 | 663,216 | 0 | Mar 18 06:23 PM |
| ALTR | Scapa James Ralph | Chief Executive Officer | Mar 15 | Sale | 61.29 | 23,238 | 1,424,237 | 0 | Mar 17 06:50 PM |
| ALTR | Scapa James Ralph | Chief Executive Officer | Mar 16 | Sale | 61.00 | 35,754 | 2,181,051 | 0 | Mar 17 06:50 PM |
| ALTR | Scapa James Ralph | Chief Executive Officer | Mar 12 | Sale | 59.51 | 1,845 | 109,794 | 101,520 | Mar 16 08:35 PM |
| ALTR | Scapa James Ralph | Chief Executive Officer | Mar 05 | Sale | 59.24 | 2,186 | 129,499 | 103,365 | Mar 08 07:36 PM |
| ALTR | Scapa James Ralph | Chief Executive Officer | Feb 18 | Sale | 61.11 | 3,755 | 229,484 | 0 | Feb 19 12:52 PM |
| ALTR | Scapa James Ralph | Chief Executive Officer | Feb 16 | Sale | 66.18 | 34,124 | 2,258,273 | 0 | Feb 18 09:37 PM |
| ALTR | Scapa James Ralph | Chief Executive Officer | Feb 17 | Sale | 62.56 | 32,121 | 2,009,487 | 0 | Feb 18 09:37 PM |
| ALTR | Scapa James Ralph | Chief Executive Officer | Jan 20 | Sale | 61.89 | 14,635 | 905,822 | 0 | Jan 22 06:59 PM |
| ALTR | Scapa James Ralph | Chief Executive Officer | Jan 15 | Sale | 60.33 | 27,765 | 1,675,126 | 0 | Jan 20 05:28 PM |
| ALTR | Scapa James Ralph | Chief Executive Officer | Jan 19 | Sale | 60.67 | 27,600 | 1,674,427 | 0 | Jan 20 05:28 PM |
| ALTR | Scapa James Ralph | Chief Executive Officer | Dec 17 | Sale | 57.83 | 5,976 | 345,590 | 0 | Dec 21 05:36 PM |
| ALTR | Scapa James Ralph | Chief Executive Officer | Dec 15 | Sale | 56.83 | 26,959 | 1,532,115 | 0 | Dec 17 05:49 PM |
| ALTR | Scapa James Ralph | Chief Executive Officer | Dec 16 | Sale | 57.01 | 27,065 | 1,543,106 | 0 | Dec 17 05:49 PM |
| ALTR | Scapa James Ralph | Chief Executive Officer | Dec 10 | Option Exercise | 5.18 | 57,915 | 300,000 | 105,551 | Dec 14 01:22 PM |
| ALTR | Scapa James Ralph | Chief Executive Officer | Nov 16 | Sale | 49.07 | 28,471 | 1,397,151 | 0 | Nov 18 02:54 PM |
| ALTR | Scapa James Ralph | Chief Executive Officer | Nov 17 | Sale | 49.26 | 31,529 | 1,553,167 | 0 | Nov 18 02:54 PM |
| ALTR | Scapa James Ralph | Chief Executive Officer | Oct 19 | Sale | 46.29 | 13,510 | 625,391 | 0 | Oct 21 04:13 PM |
| ALTR | Scapa James Ralph | Chief Executive Officer | Oct 15 | Sale | 45.77 | 28,852 | 1,320,461 | 0 | Oct 19 05:30 PM |
| ALTR | Scapa James Ralph | Chief Executive Officer | Oct 16 | Sale | 46.28 | 17,638 | 816,359 | 0 | Oct 19 05:30 PM |
| ALTR | Scapa James Ralph | Chief Executive Officer | Sep 15 | Sale | 39.65 | 37,085 | 1,470,569 | 47,636 | Sep 17 07:13 PM |
| ALTR | Scapa James Ralph | Chief Executive Officer | Sep 15 | Sale | 39.65 | 20,753 | 822,878 | 0 | Sep 17 07:13 PM |
| ALTR | Scapa James Ralph | Chief Executive Officer | Sep 16 | Sale | 40.83 | 39,237 | 1,602,045 | 0 | Sep 17 07:13 PM |
| ALTR | Scapa James Ralph | Chief Executive Officer | Aug 17 | Sale | 40.43 | 25,375 | 1,026,037 | 0 | Aug 19 02:40 PM |
| ALTR | Scapa James Ralph | Chief Executive Officer | Aug 18 | Sale | 41.13 | 34,625 | 1,424,162 | 0 | Aug 19 02:40 PM |
| ALTR | Scapa James Ralph | Chief Executive Officer | Jul 17 | Sale | 37.82 | 7,664 | 289,872 | 0 | Jul 20 04:32 PM |
| ALTR | Scapa James Ralph | Chief Executive Officer | Jul 15 | Sale | 38.00 | 28,810 | 1,094,711 | 0 | Jul 17 03:14 PM |
| ALTR | Scapa James Ralph | Chief Executive Officer | Jul 16 | Sale | 37.21 | 23,526 | 875,455 | 0 | Jul 17 03:14 PM |
| ALTR | Scapa James Ralph | Chief Executive Officer | Apr 09 | Sale | 27.32 | 2,055 | 56,143 | 47,636 | Apr 10 11:30 AM |
| ALTR | Scapa James Ralph | Chief Executive Officer | Mar 09 | Sale | 28.83 | 2,369 | 68,296 | 33,691 | Mar 11 07:00 PM |
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