PORWOLL JOE 4
4 · SIGMA ALDRICH CORP · Filed Feb 22, 2011
Insider Transaction Report
Form 4
PORWOLL JOE
VP, Milwaukee Operations
Transactions
- Award
Common Stock, $1 Par Value
2011-02-18$62.49/sh+1,200$74,988→ 11,440 total
4 · SIGMA ALDRICH CORP · Filed Feb 22, 2011
Common Stock, $1 Par Value