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CORNERSTONE CAPITAL MANAGEMENT HOLDINGS LLC.
> WLK
| Date | Name | Ticker | Shares | Change | Value | Change | Price |
| 12/31/2017 | WESTLAKE CORP | WLK | 205,874 | 204,217 | 21,931,000 | 21,794,000 | $106.53 |
| 09/30/2017 | WESTLAKE CORP | WLK | 1,657 | 1,657 | 137,000 | 137,000 | $82.68 |
| 12/31/2015 | WESTLAKE CORP | WLK | 0 | -2,209 | 0 | -207,000 | |
| 06/30/2013 | WESTLAKE CORP | WLK | 0 | -2,209 | 0 | -207,000 | |
| 03/31/2013 | WESTLAKE CORP | WLK | 2,209 | -5,759 | 207,000 | -425,000 | $93.71 |
| 12/31/2012 | WESTLAKE CORP | WLK | 7,968 | -96,593 | 632,000 | -7,008,000 | $79.32 |
| 09/30/2012 | WESTLAKE CORP | WLK | 104,561 | -9,708 | 7,640,000 | 7,141,000 | $73.07 |
| 06/30/2012 | WESTLAKE CORP | WLK | 114,269 | 110,951 | 499,000 | 284,000 | $4.37 |
| 03/31/2012 | WESTLAKE CORP | WLK | 3,318 | -4,923 | 215,000 | -117,000 | $64.80 |
| 12/31/2011 | WESTLAKE CORP | WLK | 8,241 | 6,587 | 332,000 | 275,000 | $40.29 |
| 09/30/2011 | WESTLAKE CORP | WLK | 1,654 | -37,722 | 57,000 | -1,986,000 | $34.46 |
| 06/30/2011 | WESTLAKE CORP | WLK | 39,376 | 23,812 | 2,043,000 | 1,168,000 | $51.88 |
| 03/31/2011 | WESTLAKE CORP | WLK | 15,564 | 9,367 | 875,000 | 606,000 | $56.22 |
| 12/31/2010 | WESTLAKE CORP | WLK | 6,197 | 5,397 | 269,000 | 248,000 | $43.41 |
| 03/31/2010 | WESTLAKE CORP | WLK | 800 | -100 | 21,000 | -1,000 | $26.25 |
| 12/31/2009 | WESTLAKE CORP | WLK | 900 | -747 | 22,000 | -20,000 | $24.44 |
| 09/30/2009 | WESTLAKE CORP | WLK | 1,647 | -11,895 | 42,000 | -234,000 | $25.50 |
| 06/30/2009 | WESTLAKE CORP | WLK | 13,542 | 6,803 | 276,000 | 177,000 | $20.38 |
| 03/31/2009 | WESTLAKE CORP | WLK | 6,739 | 6,739 | 99,000 | 99,000 | $14.69 |
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