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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 |
|---|---|---|---|---|---|---|---|---|---|
| WST | ANDERSON MICHAEL A | Vice President & Treasurer | Mar 01 '16 | Option Exercise | 17.13 | 8,414 | 144,109 | 71,921 | Mar 02 11:47 AM |
| WST | ANDERSON MICHAEL A | Vice President & Treasurer | Mar 01 '16 | Sale | 63.58 | 16,414 | 1,043,650 | 55,507 | Mar 02 11:47 AM |
| WST | ANDERSON MICHAEL A | Vice President & Treasurer | Nov 06 '15 | Sale | 62.18 | 3,000 | 186,540 | 61,497 | Nov 09 10:24 AM |
| WST | ANDERSON MICHAEL A | Vice President & Treasurer | Nov 05 '15 | Option Exercise | 22.48 | 10,000 | 224,850 | 74,497 | Nov 06 10:52 AM |
| WST | ANDERSON MICHAEL A | Vice President & Treasurer | Nov 05 '15 | Sale | 61.98 | 10,000 | 619,817 | 64,497 | Nov 06 10:52 AM |
| WST | ANDERSON MICHAEL A | Vice President & Treasurer | May 29 '15 | Sale | 54.73 | 3,196 | 174,917 | 64,436 | Jun 04 10:56 AM |
| WST | ANDERSON MICHAEL A | Vice President & Treasurer | May 29 '15 | Option Exercise | 16.05 | 2,000 | 32,090 | 69,632 | Jun 02 12:11 PM |
| WST | ANDERSON MICHAEL A | Vice President & Treasurer | May 29 '15 | Sale | 54.44 | 2,000 | 108,879 | 67,632 | Jun 02 12:11 PM |
| WST | ANDERSON MICHAEL A | Vice President & Treasurer | Feb 27 '15 | Option Exercise | 16.05 | 2,000 | 32,090 | 73,168 | Mar 03 10:42 AM |
| WST | ANDERSON MICHAEL A | Vice President & Treasurer | Feb 27 '15 | Sale | 54.70 | 4,000 | 218,800 | 69,168 | Mar 03 10:42 AM |
| WST | ANDERSON MICHAEL A | Vice President & Treasurer | Feb 26 '15 | Option Exercise | 16.29 | 4,682 | 76,281 | 75,850 | Feb 27 11:54 AM |
| WST | ANDERSON MICHAEL A | Vice President & Treasurer | Feb 26 '15 | Sale | 54.92 | 4,682 | 257,159 | 71,168 | Feb 27 11:54 AM |
| WST | ANDERSON MICHAEL A | Vice President & Treasurer | Nov 11 '14 | Option Exercise | 16.29 | 4,600 | 74,946 | 71,913 | Nov 12 08:55 AM |
| WST | ANDERSON MICHAEL A | Vice President & Treasurer | Nov 11 '14 | Sale | 51.73 | 4,600 | 237,957 | 67,313 | Nov 12 08:55 AM |
| WST | ANDERSON MICHAEL A | Vice President & Treasurer | Aug 20 '14 | Option Exercise | 12.77 | 3,400 | 43,401 | 70,713 | Aug 21 08:27 PM |
| WST | ANDERSON MICHAEL A | Vice President & Treasurer | Aug 19 '14 | Sale | 43.41 | 9,800 | 425,441 | 67,313 | Aug 21 08:27 PM |
| WST | ANDERSON MICHAEL A | Vice President & Treasurer | Nov 08 '13 | Sale | 46.80 | 9,200 | 430,528 | 73,406 | Nov 08 02:15 PM |
| WST | ANDERSON MICHAEL A | Vice President & Treasurer | Nov 06 '13 | Sale | 46.53 | 6,000 | 279,199 | 82,606 | Nov 07 09:35 AM |
| WST | ANDERSON MICHAEL A | Vice President & Treasurer | Aug 08 '13 | Option Exercise | 25.53 | 3,000 | 76,590 | 48,603 | Aug 09 09:19 AM |
| WST | ANDERSON MICHAEL A | Vice President & Treasurer | Aug 08 '13 | Sale | 78.00 | 4,300 | 335,400 | 44,303 | Aug 09 09:19 AM |
| WST | ANDERSON MICHAEL A | Vice President & Treasurer | May 31 '13 | Option Exercise | 25.53 | 2,300 | 58,719 | 49,561 | May 31 02:57 PM |
| WST | ANDERSON MICHAEL A | Vice President & Treasurer | May 31 '13 | Sale | 68.94 | 4,000 | 275,752 | 45,561 | May 31 02:57 PM |
| WST | ANDERSON MICHAEL A | Vice President & Treasurer | Feb 28 '13 | Option Exercise | 19.36 | 2,400 | 46,476 | 52,114 | Mar 01 10:06 AM |
| WST | ANDERSON MICHAEL A | Vice President & Treasurer | Feb 28 '13 | Sale | 60.52 | 4,900 | 296,535 | 47,214 | Mar 01 10:06 AM |
| WST | ANDERSON MICHAEL A | Vice President & Treasurer | Nov 09 '12 | Sale | 53.65 | 2,800 | 150,232 | 47,952 | Nov 13 08:47 AM |
| WST | ANDERSON MICHAEL A | Vice President & Treasurer | May 31 '12 | Option Exercise | 19.36 | 5,800 | 112,317 | 56,362 | May 31 02:50 PM |
| WST | ANDERSON MICHAEL A | Vice President & Treasurer | May 31 '12 | Sale | 47.81 | 5,800 | 277,316 | 50,562 | May 31 02:50 PM |
| WST | ANDERSON MICHAEL A | Vice President & Treasurer | May 04 '11 | Sale | 47.02 | 7,000 | 329,150 | 49,840 | May 04 02:33 PM |
| WST | ANDERSON MICHAEL A | Vice President & Treasurer | Aug 05 '10 | Sale | 34.84 | 3,400 | 118,457 | 55,954 | Aug 09 10:55 AM |
| WST | ANDERSON MICHAEL A | Vice President & Treasurer | Mar 22 '10 | Option Exercise | 13.02 | 12,500 | 162,696 | 65,711 | Mar 24 10:53 AM |
| WST | ANDERSON MICHAEL A | Vice President & Treasurer | Mar 01 '10 | Option Exercise | 13.02 | 12,532 | 163,113 | 59,866 | Mar 03 09:32 AM |
| WST | ANDERSON MICHAEL A | Vice President & Treasurer | Dec 23 '09 | Option Exercise | 13.02 | 25,000 | 325,392 | 61,146 | Dec 28 12:04 PM |
| WST | ANDERSON MICHAEL A | Vice President & Treasurer | Aug 17 '09 | Sale | 38.66 | 4,500 | 173,970 | 36,095 | Aug 18 04:00 PM |
| WST | ANDERSON MICHAEL A | Vice President & Treasurer | Aug 12 '09 | Option Exercise | 13.02 | 24,900 | 324,091 | 53,942 | Aug 14 10:04 AM |
| WST | ANDERSON MICHAEL A | Vice President & Treasurer | Feb 27 '09 | Option Exercise | 13.02 | 10,000 | 130,157 | 39,836 | Mar 03 08:37 AM |
| WST | ANDERSON MICHAEL A | Vice President & Treasurer | Feb 27 '09 | Sale | 30.00 | 10,000 | 299,987 | 29,836 | Mar 03 08:37 AM |
| WST | ANDERSON MICHAEL A | Vice President & Treasurer | Aug 15 '08 | Option Exercise | 13.02 | 3,000 | 39,047 | 29,923 | Aug 18 02:39 PM |
| WST | ANDERSON MICHAEL A | Vice President & Treasurer | Aug 15 '08 | Sale | 50.82 | 3,000 | 152,451 | 26,923 | Aug 18 02:39 PM |
| WST | ANDERSON MICHAEL A | Vice President & Treasurer | May 08 '08 | Sale | 45.44 | 2,500 | 113,608 | 26,880 | May 08 02:54 PM |
| WST | ANDERSON MICHAEL A | Vice President & Treasurer | Feb 29 '08 | Sale | 41.85 | 2,500 | 104,625 | 29,319 | Feb 29 03:30 PM |
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