Albert Chao

Insider Trading: Sales
Company Symbol Price Amount Relationship Remaining Holdings Date Form 4
WLK $75.63 600 Large Shareholder, Officer, Director 191,616 2012-11-26 Filing
WLK $75.50 2,000 Large Shareholder, Officer, Director 192,216 2012-11-26 Filing
WLK $75.43 100 Large Shareholder, Officer, Director 194,216 2012-11-26 Filing
WLK $75.41 900 Large Shareholder, Officer, Director 194,316 2012-11-26 Filing
WLK $75.40 100 Large Shareholder, Officer, Director 195,216 2012-11-26 Filing
WLK $75.35 100 Large Shareholder, Officer, Director 195,316 2012-11-26 Filing
WLK $75.30 3,800 Large Shareholder, Officer, Director 195,416 2012-11-26 Filing
WLK $75.10 100 Large Shareholder, Officer, Director 199,216 2012-11-26 Filing
WLK $75.03 21 Large Shareholder, Officer, Director 199,316 2012-11-26 Filing
WLK $75.02 879 Large Shareholder, Officer, Director 199,337 2012-11-26 Filing
WLK $75.00 30,699 Large Shareholder, Officer, Director 200,216 2012-11-26 Filing
WLK $76.49 1,600 Large Shareholder, Officer, Director 139,875 2012-11-23 Filing
WLK $76.49 400 Large Shareholder, Officer, Director 141,475 2012-11-23 Filing
WLK $76.47 300 Large Shareholder, Officer, Director 141,875 2012-11-23 Filing
WLK $76.38 500 Large Shareholder, Officer, Director 142,175 2012-11-23 Filing
WLK $76.28 155 Large Shareholder, Officer, Director 142,675 2012-11-23 Filing
WLK $76.27 900 Large Shareholder, Officer, Director 142,830 2012-11-23 Filing
WLK $76.25 2,000 Large Shareholder, Officer, Director 143,730 2012-11-23 Filing
WLK $76.21 100 Large Shareholder, Officer, Director 145,730 2012-11-23 Filing
WLK $76.20 200 Large Shareholder, Officer, Director 145,830 2012-11-23 Filing