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| Ticker | Owner | Relationship | Date | Transaction | Cost | #Shares | Value ($) | #Shares Total | SEC Form 4 |
|---|---|---|---|---|---|---|---|---|---|
| WLK | Chao Albert | Executive Chairman | Feb 17 '26 | Option Exercise | 0.00 | 33,110 | 0 | 644,277 | Feb 19 12:00 AM |
| WLK | Chao Albert | Executive Chairman | Dec 22 '25 | Option Exercise | 44.42 | 163,346 | 7,255,830 | 668,558 | Dec 23 12:00 AM |
| WLK | Chao Albert | Executive Chairman | Dec 22 '25 | Sale | 73.57 | 40,836 | 3,004,374 | 627,722 | Dec 23 12:00 AM |
| WLK | Chao Albert | Executive Chairman | Feb 18 '25 | Option Exercise | 0.00 | 35,944 | 0 | 572,888 | Feb 20 12:00 AM |
| WLK | Chao Albert | Executive Chairman | Aug 16 '24 | Option Exercise | 68.09 | 90,596 | 6,168,682 | 600,214 | Aug 19 12:00 AM |
| WLK | Chao Albert | President & CEO | Feb 19 '24 | Option Exercise | 0.00 | 39,620 | 0 | 579,696 | Feb 21 12:00 AM |
| WLK | Chao Albert | President & CEO | Aug 31 '23 | Option Exercise | 63.98 | 39,976 | 2,557,564 | 540,136 | Sep 01 12:00 AM |
| WLK | Chao Albert | President & CEO | Aug 30 '23 | Option Exercise | 63.98 | 40,000 | 2,559,100 | 540,148 | Aug 31 12:00 AM |
| WLKP | Chao Albert | President & CEO | Mar 24 '20 | Buy | 13.70 | 4,779 | 65,462 | 166,435 | Mar 25 12:00 AM |
| WLKP | Chao Albert | President & CEO | Mar 23 '20 | Buy | 13.12 | 4,780 | 62,714 | 161,656 | Mar 24 12:00 AM |
| WLKP | Chao Albert | President & CEO | Mar 20 '20 | Buy | 13.90 | 13,681 | 190,207 | 156,876 | Mar 23 12:00 AM |
| WLKP | Chao Albert | President & CEO | Mar 19 '20 | Buy | 13.80 | 9,135 | 126,021 | 143,195 | Mar 20 12:00 AM |
| WLKP | Chao Albert | President & CEO | Mar 18 '20 | Buy | 11.68 | 15,974 | 186,583 | 134,060 | Mar 19 12:00 AM |
| WLKP | Chao Albert | President & CEO | Mar 17 '20 | Buy | 13.82 | 10,536 | 145,650 | 118,086 | Mar 18 12:00 AM |
| WLKP | Chao Albert | President & CEO | Mar 16 '20 | Buy | 14.15 | 7,535 | 106,620 | 107,550 | Mar 17 12:00 AM |
| WLKP | Chao Albert | President & CEO | Mar 13 '20 | Buy | 15.18 | 3,580 | 54,344 | 100,015 | Mar 16 12:00 AM |
| WLKP | Chao Albert | President & CEO | Nov 19 '18 | Buy | 23.24 | 10,386 | 241,371 | 96,435 | Nov 20 12:00 AM |
| WLKP | Chao Albert | President & CEO | Nov 16 '18 | Buy | 23.27 | 12,452 | 289,758 | 86,049 | Nov 19 12:00 AM |
| WLKP | Chao Albert | President & CEO | Nov 15 '18 | Buy | 23.20 | 2,492 | 57,819 | 73,597 | Nov 19 12:00 AM |
| WLKP | Chao Albert | President & CEO | Nov 14 '18 | Buy | 23.37 | 11,385 | 266,056 | 71,105 | Nov 15 12:00 AM |
| WLKP | Chao Albert | President & CEO | Nov 13 '18 | Buy | 23.24 | 6,220 | 144,578 | 59,720 | Nov 15 12:00 AM |
| WLKP | Chao Albert | President & CEO | Mar 06 '18 | Buy | 23.16 | 2,000 | 46,320 | 53,500 | Mar 07 12:00 AM |
| WLKP | Chao Albert | President & CEO | Mar 05 '18 | Buy | 22.91 | 2,000 | 45,820 | 51,500 | Mar 06 12:00 AM |
| WLKP | Chao Albert | President & CEO | Mar 02 '18 | Buy | 22.86 | 2,000 | 45,720 | 49,500 | Mar 06 12:00 AM |
| WLKP | Chao Albert | President & CEO | Mar 01 '18 | Buy | 22.98 | 2,500 | 57,450 | 47,500 | Mar 02 12:00 AM |
| WLKP | Chao Albert | President & CEO | Nov 29 '17 | Buy | 22.00 | 7,425 | 163,350 | 27,275 | Nov 29 12:00 AM |
| WLKP | Chao Albert | President & CEO | Nov 28 '17 | Buy | 21.96 | 7,475 | 164,151 | 19,850 | Nov 29 12:00 AM |
| WLKP | Chao Albert | President & CEO | Nov 27 '17 | Buy | 22.18 | 7,475 | 165,796 | 12,375 | Nov 28 12:00 AM |
| WLKP | Chao Albert | President & CEO | Nov 24 '17 | Buy | 21.97 | 2,900 | 63,705 | 4,900 | Nov 28 12:00 AM |
| WLKP | Chao Albert | President & CEO | Nov 22 '17 | Buy | 21.49 | 4,000 | 85,976 | 47,000 | Nov 28 12:00 AM |
| WLKP | Chao Albert | President & CEO | Aug 04 '14 | Buy | 0.73 | 1,481,115 | 1,080,000 | 1,436,115 | Aug 06 12:00 AM |