A significant insider transaction involving the exercise of company stock options was reported on August 28, by Scott D Kirkland, Chief Financial Officer at Ecolab (NYSE:ECL), as per the latest SEC filing. What Happened: A Form 4 filing with the U.S. Securities and Exchange Commission on Wednesday revealed that Kirkland, Chief Financial Officer at Ecolab in the Materials sector, exercised stock options for 2,753 shares of ECL stock. The exercise price of the options was $107.69 per share. The Thursday morning market activity shows Ecolab shares down by 0.0%, trading at $249.61. This implies a …