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Filing Details

Issuer

Cik	Name	Symbol	Sector (SIC)	IRS No
90185	Sigma Aldrich Corp	SIAL	Wholesale-Chemicals & Allied Products (5160)	431050617

Insiders

Cik	Name	Reported Address	Insider Title	Director	Officer	Large Shareholder	Other
1210650	Gilles Cottier	C/O Sigma-Aldrich Corporation 3050 Spruce St St Louis MO 63103	Evp & Pres. Safc Commercial	No	Yes	No	No

Reported Non-Derivative Transactions

Sec. Name	Acquisiton - Disposition	Date	Amount	Price	Remaning Holdings	Equity Swap Involved	Form Type	Code	Nature of Ownership	Explanation
Common Stock	Acquisiton	2013-05-22	5,319	$34.03	31,428	No	4	M	Direct
Common Stock	Disposition	2013-05-22	5,319	$85.03	26,109	No	4	S	Direct

Equity Swap Involved	Form Type	Code	Nature of Ownership	Explanation
No	4	M	Direct
No	4	S	Direct

Reported Derivative Transactions

Sec. Name	Sec. Type	Acquisiton - Disposition	Date	Amount	Price	Amount - 2	Price - 2
Common Stock	NQ Stock Option Right to Buy	Disposition	2013-05-22	5,319	$34.03	5,319	$34.03

Remaning Holdings	Exercise Date	Expiration Date	Equity Swap Involved	Transaction Form Type	Transaction Code	Nature of Ownership
5,981	2007-05-01	2016-05-01	No	4	M	Direct

Footnotes

The price reported in Column 4 is a weighted average price. These shares were sold in multiple transactions at prices ranging from $85.00 to $85.16, inclusive. The reporting person undertakes to provide to Sigma-Aldrich Corporation, any security holder of Sigma-Aldrich Corporation, or the staff of the Securities and Exchange Commission, upon request, full information regarding the number of shares sold at each separate price within the range set forth in footnote (1) to this Form 4.
The options vested in three equal installments on May 1, 2007, 2008, and 2009.