On August 30, executives from four companies sold off shares of their own stock.

1: Corning (GLW) executive Lewis Steverson plans to sell 13,100 shares on August 28 for about $1.98 million. Low signal.

2: Google (GOOGL) director Frances Arnold plans to sell 82 shares on August 28 for about $28,000. Low signal.

3: IBM executive Thomas David actually sold 25,000 shares on August 26 for about $5.76 million. Medium signal.

4: Lumentum (LITE) executive Wupen Yuen plans to resell 500 shares on August 28 for about $470,000. Low signal.