Joe Porwoll, Insider at SIGMA ALDRICH CORP (SIAL), sold 5,400 shares at $61.00 ($329K) on 2008-07-30, disclosed to the SEC on 2008-07-30.
Open-market sale of $329k SIAL by Insider. Not flagged as scheduled, tax-driven, or recurring — but no specific bearish signal from our filters. Reasons for insider sales vary widely.
Nothing distinguishes this filing.