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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
1345644	Douglas Rau	C/O Sigma-Aldrich Corporation 3050 Spruce Street St. Louis MO 63103	Vp, Human Resources	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
Common Stock	Acquisiton	2015-08-11	1,850	$52.76	16,676	No	4	M	Direct
Common Stock	Acquisiton	2015-08-11	2,232	$37.56	18,908	No	4	M	Direct
Common Stock	Acquisiton	2015-08-11	2,439	$48.61	21,347	No	4	M	Direct
Common Stock	Acquisiton	2015-08-11	1,600	$62.49	22,947	No	4	M	Direct
Common Stock	Acquisiton	2015-08-11	1,422	$70.32	24,369	No	4	M	Direct
Common Stock	Disposition	2015-08-11	9,543	$139.68	14,826	No	4	S	Direct

Equity Swap Involved	Form Type	Code	Nature of Ownership
No	4	M	Direct
No	4	M	Direct
No	4	M	Direct
No	4	M	Direct
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	ISO Stock Option Right To Buy	Disposition	2015-08-11	1,850	$0.00	1,850	$52.76
Common Stock	ISO Stock Option Right To Buy	Disposition	2015-08-11	2,232	$0.00	2,232	$37.56
Common Stock	ISO Stock Option Right To Buy	Disposition	2015-08-11	2,439	$0.00	2,439	$48.61
Common Stock	ISO Stock Option Right To Buy	Disposition	2015-08-11	1,600	$0.00	1,600	$62.49
Common Stock	ISO Stock Option Right To Buy	Disposition	2015-08-11	1,422	$0.00	1,422	$70.32

Exercise Date	Expiration Date	Equity Swap Involved	Transaction Form Type	Transaction Code	Nature of Ownership
2011-02-15	2018-02-15	No	4	M	Direct
2010-02-17	2019-02-17	No	4	M	Direct
2011-02-16	2020-02-16	No	4	M	Direct
2012-02-14	2021-02-14	No	4	M	Direct
2013-02-14	2022-02-14	No	4	M	Direct

Reported Non-Derivative Holdings

Sec. Name	Remaning Holdings	Nature of Ownership	Explanation
Common Stock	231	Indirect	By 401(k) Plan

Footnotes

The price reported in Column 4 is a weighted average price. These shares were sold in multiple transactions at prices ranging from $139.681 to $139.683, 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 ranges set forth in footnote (1) to this Form 4.
The number of shares is based on a 401(k) statement dated as of 8/11/15.
The options vested 100% after three years.
The options were granted on February 17, 2009 and vested in three equal annual installments beginning February 17, 2010.
The options were granted on February 16, 2010 and vested in three equal annual installments beginning February 16, 2011.
The options were granted on February 14, 2011 and vested in three equal annual installments beginning February 14, 2012.
The options were granted on February 14, 2012 and vested in three equal annual installments beginning February 14, 2013.