William C. Oneil, Director at SIGMA ALDRICH CORP (SIAL), sold 24,000 shares at $57.36 ($1.4M) on 2008-05-02, disclosed to the SEC on 2008-05-06.
Open-market sale of $1.4M SIAL by Director. 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.