PORWOLL JOE 4
4 · SIGMA ALDRICH CORP · Filed Sep 2, 2011
Insider Transaction Report
Form 4
PORWOLL JOE
VP, Milwaukee Operations
Transactions
- Gift
Common Stock, $1 par value
2011-09-02$61.99/sh−100$6,199→ 10,740 total
4 · SIGMA ALDRICH CORP · Filed Sep 2, 2011
Common Stock, $1 par value