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Filing Details

Issuer

Cik	Name	Symbol	Sector (SIC)	IRS No
1071739	Centene Corp	CNC	Hospital & Medical Service Plans (6324)	041406317

Insiders

Cik	Name	Reported Address	Insider Title	Director	Officer	Large Shareholder	Other
1186257	F Michael Neidorff	7711 Carondelet Avenue St. Louis MO 63105	Chairman, President And Ceo	Yes	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	2010-08-02	5,000	$13.58	1,531,363	No	4	M	Direct
Common Stock	Disposition	2010-08-02	3,890	$22.01	1,527,473	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	Common Stock Option (right to buy)	Disposition	2010-08-02	5,000	$13.58	5,000	$13.58

Remaning Holdings	Exercise Date	Expiration Date	Equity Swap Involved	Transaction Form Type	Transaction Code	Nature of Ownership
228,036	2005-08-26	2013-08-26	No	4	M	Direct

Reported Derivative Holdings

Sec. Name	Sec. Type	Price	Date	Expiration Date	Amount	Remaning Holdings	Nature of Ownership
Common Stock	Phantom Stock	$0.00	2010-07-23	2010-07-23	44,780	44,780	Direct
Common Stock	Common Stock Option (right to buy)	$7.57	2007-07-24	2012-07-24	210	210	Direct
Common Stock	Common Stock Option (right to buy)	$13.98	2006-12-16	2013-12-16	200,000	200,000	Direct
Common Stock	Common Stock Option (right to buy)	$17.85	2007-07-27	2014-07-27	180,000	180,000	Direct
Common Stock	Common Stock Option (right to buy)	$25.40	2008-12-13	2015-12-13	200,000	200,000	Direct
Common Stock	Common Stock Option (right to buy)	$25.21	2009-12-12	2016-12-12	100,000	100,000	Direct

Expiration Date	Amount	Remaning Holdings	Nature of Ownership
2010-07-23	44,780	44,780	Direct
2012-07-24	210	210	Direct
2013-12-16	200,000	200,000	Direct
2014-07-27	180,000	180,000	Direct
2015-12-13	200,000	200,000	Direct
2016-12-12	100,000	100,000	Direct

Footnotes

Ownership includes previous awards of 650,000 restricted stock units subject to vesting requirements.
This sale is pursuant to a 10b5-1 trading plan established on June 11, 2010. The weighted average price for this transaction is reported within the form. Full information regarding the number of shares sold at each separate price is available upon request.
Each share of phantom stock represents the right to receive the fair market value of one share of Centene common stock.
The phantom stock has no formal expiration date. The phantom stock will be settled in cash or other non-Company securities upon Mr. Neidorff's termination with the Company or on such other date Mr. Neidorff may elect.