Michael J. Mattina, Senior VP, Polyethylene at WESTLAKE CHEMICAL CORP (WLK), sold 18,274 shares at $53.78 ($983K) on 2016-11-15, disclosed to the SEC on 2016-11-17.
Open-market sale of $983k WLK by Senior VP, Polyethylene. Not flagged as scheduled, tax-driven, or recurring — but no specific bearish signal from our filters. Reasons for insider sales vary widely.
Something here stands out, but not much.