Insider Trades - VAN DEN DOOL GERRIT

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VAN DEN DOOL GERRIT: Declared Holdings
Company/Relationship	Reported	Shares	Ownership
Sigma-Aldrich Corporation Other NasdaqGS:SIAL (historical quotes, profile, SEC, other insiders)	18-May-09	6,540	Direct

Insider & restricted shareholder transactions reported over the last two years
Date Shares Stock Transaction
18-May-09 10,000 SIAL Option Exercise at $25.32 per share.
(Cost of $253,200)
18-May-09 10,000 SIAL Sale at $45.38 - $45.4 per share.
(Proceeds of about $454,000)
18-Feb-09 540 SIAL Acquisition (Non Open Market) at $37.56 per share.
(Value of $20,282)

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Insider & restricted shareholder transactions reported over the last two years
Date	Shares	Stock	Transaction
18-May-09	10,000	SIAL	Option Exercise at $25.32 per share. (Cost of $253,200)
18-May-09	10,000	SIAL	Sale at $45.38 - $45.4 per share. (Proceeds of about $454,000)
18-Feb-09	540	SIAL	Acquisition (Non Open Market) at $37.56 per share. (Value of $20,282)