Albert Chao

Insider Trading: Sales
Company Symbol Price Amount Relationship Remaining Holdings Date Form 4
WLK $63.35 42,180 Large Shareholder, Officer, Director 274,018 2017-02-23 Filing
WLK $54.57 300 Large Shareholder, Officer, Director 0 2016-11-17 Filing
WLK $53.82 9,700 Large Shareholder, Officer, Director 300 2016-11-17 Filing
WLK $54.45 10,000 Large Shareholder, Officer, Director 10,000 2016-11-16 Filing
WLK $53.06 10,000 Large Shareholder, Officer, Director 20,000 2016-11-15 Filing
WLK $52.84 10,000 Large Shareholder, Officer, Director 30,000 2016-11-14 Filing
WLK $73.78 300 Large Shareholder, Officer, Director 146,432 2012-12-07 Filing
WLK $73.77 300 Large Shareholder, Officer, Director 146,732 2012-12-07 Filing
WLK $73.76 200 Large Shareholder, Officer, Director 147,032 2012-12-07 Filing
WLK $73.75 2,808 Large Shareholder, Officer, Director 147,232 2012-12-07 Filing
WLK $72.90 410 Large Shareholder, Officer, Director 150,040 2012-12-06 Filing
WLK $72.86 100 Large Shareholder, Officer, Director 150,450 2012-12-06 Filing
WLK $72.80 500 Large Shareholder, Officer, Director 150,550 2012-12-06 Filing
WLK $72.79 100 Large Shareholder, Officer, Director 151,050 2012-12-06 Filing
WLK $72.76 100 Large Shareholder, Officer, Director 151,150 2012-12-06 Filing
WLK $72.74 500 Large Shareholder, Officer, Director 151,250 2012-12-06 Filing
WLK $72.73 30 Large Shareholder, Officer, Director 151,750 2012-12-06 Filing
WLK $72.71 2,000 Large Shareholder, Officer, Director 151,780 2012-12-06 Filing
WLK $72.70 100 Large Shareholder, Officer, Director 153,780 2012-12-06 Filing
WLK $72.69 300 Large Shareholder, Officer, Director 153,880 2012-12-06 Filing