Richard A. Keffer, General Counsel & Secretary at SIGMA ALDRICH CORP (SIAL), bought 1,000 shares at $74.10 ($74K) on 2006-10-31, disclosed to the SEC on 2006-10-31.
Open-market purchase of $74k SIAL by General Counsel & Secretary. Below the thresholds we flag for high-conviction alerts (no C-suite role, rare reversal, cluster, or A-grade history).
Nothing distinguishes this filing.