Magnus Borg, Insider at SIGMA ALDRICH CORP (SIAL), bought 375 shares at $59.00 ($22K) on 2011-08-10, disclosed to the SEC on 2011-08-10.
Open-market purchase of $22k SIAL by Insider. Below the thresholds we flag for high-conviction alerts (no C-suite role, rare reversal, cluster, or A-grade history).
Nothing distinguishes this filing.