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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 |
|---|---|---|---|---|---|---|---|---|---|
| AMBR | Preuninger James W | Chief Executive Officer | May 14 '19 | Sale | 12.97 | 70,000 | 907,900 | 2,285,054 | May 16 08:30 PM |
| AMBR | Preuninger James W | Chief Executive Officer | Mar 07 '19 | Option Exercise | 0.00 | 682,685 | 0 | 2,355,054 | Mar 08 09:37 PM |
| AMBR | Preuninger James W | Chief Executive Officer | Feb 20 '19 | Option Exercise | 0.00 | 42,872 | 0 | 1,713,929 | Feb 22 05:06 PM |
| AMBR | Preuninger James W | Chief Executive Officer | Feb 20 '19 | Sale | 9.51 | 41,560 | 395,236 | 1,672,369 | Feb 22 05:06 PM |
| AMBR | Preuninger James W | Chief Executive Officer | Nov 27 '18 | Sale | 8.96 | 10,000 | 89,600 | 1,681,057 | Nov 30 04:49 PM |
| AMBR | Preuninger James W | Chief Executive Officer | Nov 28 '18 | Sale | 9.03 | 10,000 | 90,300 | 1,671,057 | Nov 30 04:49 PM |
| AMBR | Preuninger James W | Chief Executive Officer | Nov 21 '18 | Sale | 8.65 | 20,000 | 173,000 | 1,701,057 | Nov 26 06:46 PM |
| AMBR | Preuninger James W | Chief Executive Officer | Nov 26 '18 | Sale | 8.66 | 10,000 | 86,600 | 1,691,057 | Nov 26 06:46 PM |
| AMBR | Preuninger James W | Chief Executive Officer | Nov 16 '18 | Sale | 8.96 | 30,000 | 268,800 | 1,721,057 | Nov 20 07:47 PM |
| AMBR | Preuninger James W | Chief Executive Officer | Aug 21 '18 | Sale | 8.52 | 10,000 | 85,200 | 1,751,057 | Aug 22 04:05 PM |
| AMBR | Preuninger James W | Chief Executive Officer | Aug 13 '18 | Sale | 8.88 | 12,500 | 111,000 | 1,768,557 | Aug 16 04:15 PM |
| AMBR | Preuninger James W | Chief Executive Officer | Aug 14 '18 | Sale | 8.97 | 7,500 | 67,275 | 1,761,057 | Aug 16 04:15 PM |
| AMBR | Preuninger James W | Chief Executive Officer | Jul 16 '18 | Option Exercise | 0.00 | 24,253 | 0 | 1,789,437 | Jul 19 05:59 PM |
| AMBR | Preuninger James W | Chief Executive Officer | Jul 17 '18 | Sale | 8.82 | 8,380 | 73,912 | 1,781,057 | Jul 19 05:59 PM |
| AMBR | Preuninger James W | Chief Executive Officer | May 15 '18 | Sale | 9.35 | 15,000 | 140,250 | 1,800,184 | May 17 08:44 PM |
| AMBR | Preuninger James W | Chief Executive Officer | May 16 '18 | Sale | 9.50 | 20,000 | 190,000 | 1,780,184 | May 17 08:44 PM |
| AMBR | Preuninger James W | Chief Executive Officer | May 17 '18 | Sale | 9.65 | 15,000 | 144,750 | 1,765,184 | May 17 08:44 PM |
| AMBR | Preuninger James W | Chief Executive Officer | Sep 15 '17 | Sale | 7.56 | 36,609 | 276,764 | 1,815,184 | Sep 15 06:28 PM |
| AMBR | Preuninger James W | Chief Executive Officer | Sep 12 '17 | Sale | 7.75 | 10,300 | 79,825 | 1,857,722 | Sep 14 04:09 PM |
| AMBR | Preuninger James W | Chief Executive Officer | Sep 13 '17 | Sale | 7.75 | 5,929 | 45,950 | 1,851,793 | Sep 14 04:09 PM |
| AMBR | Preuninger James W | Chief Executive Officer | Sep 07 '17 | Sale | 8.00 | 7,962 | 63,696 | 1,877,222 | Sep 11 04:30 PM |
| AMBR | Preuninger James W | Chief Executive Officer | Sep 08 '17 | Sale | 7.75 | 6,100 | 47,275 | 1,871,122 | Sep 11 04:30 PM |
| AMBR | Preuninger James W | Chief Executive Officer | Sep 11 '17 | Sale | 7.75 | 3,100 | 24,025 | 1,868,022 | Sep 11 04:30 PM |
| AMBR | Preuninger James W | Chief Executive Officer | Dec 13 '16 | Sale | 10.29 | 13,911 | 143,144 | 1,885,184 | Dec 13 04:34 PM |
| AMBR | Preuninger James W | Chief Executive Officer | Dec 08 '16 | Sale | 11.21 | 15,000 | 168,150 | 1,905,184 | Dec 12 04:30 PM |
| AMBR | Preuninger James W | Chief Executive Officer | Dec 09 '16 | Sale | 11.14 | 6,089 | 67,831 | 1,899,095 | Dec 12 04:30 PM |
| AMBR | Preuninger James W | Chief Executive Officer | Aug 18 '16 | Sale | 11.00 | 400 | 4,400 | 1,920,184 | Aug 19 03:39 PM |
| AMBR | Preuninger James W | Chief Executive Officer | Aug 09 '16 | Sale | 10.30 | 58,003 | 597,431 | 1,920,184 | Aug 11 04:55 PM |
| AMBR | Preuninger James W | Chief Executive Officer | Aug 11 '16 | Sale | 10.30 | 41,997 | 432,569 | 1,920,184 | Aug 11 04:55 PM |
| AMBR | Preuninger James W | Chief Executive Officer | May 18 '16 | Sale | 5.00 | 74,605 | 373,025 | 1,920,184 | May 20 12:31 PM |
| AMBR | Preuninger James W | Chief Executive Officer | May 19 '16 | Sale | 5.00 | 12,227 | 61,135 | 1,920,184 | May 20 12:31 PM |
| AMBR | Preuninger James W | Chief Executive Officer | May 20 '16 | Sale | 5.00 | 13,168 | 65,840 | 1,920,184 | May 20 12:31 PM |
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