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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	7700 Forysth Boulevard 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
Common Stock	Acquisiton	2012-02-29	100,000	$13.58	1,782,891	No	4	M	Direct
Common Stock	Disposition	2012-02-29	100,000	$48.97	1,682,891	No	4	S	Direct
Common Stock	Acquisiton	2012-03-01	22,759	$13.58	1,705,650	No	4	M	Direct
Common Stock	Acquisiton	2012-03-01	45,832	$13.98	1,751,482	No	4	M	Direct
Common Stock	Disposition	2012-03-01	68,591	$48.93	1,682,891	No	4	S	Direct
Common Stock	Acquisiton	2012-03-02	81,409	$13.98	1,764,300	No	4	M	Direct
Common Stock	Disposition	2012-03-02	81,409	$47.45	1,682,891	No	4	S	Direct

Equity Swap Involved	Form Type	Code	Nature of Ownership
No	4	M	Direct
No	4	S	Direct
No	4	M	Direct
No	4	M	Direct
No	4	S	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	Common Stock Option (right to buy)	Disposition	2012-02-29	100,000	$13.58	100,000	$13.58
Common Stock	Common Stock Option (right to buy)	Disposition	2012-03-01	22,759	$13.58	22,759	$13.58
Common Stock	Common Stock Option (right to buy)	Disposition	2012-03-01	45,832	$13.98	45,832	$13.98
Common Stock	Common Stock Option (right to buy)	Disposition	2012-03-02	81,409	$13.98	81,409	$13.98

Remaning Holdings	Exercise Date	Expiration Date	Equity Swap Involved	Transaction Form Type	Transaction Code	Nature of Ownership
22,759	2008-08-26	2013-08-26	No	4	M	Direct
0	2008-08-26	2013-08-26	No	4	M	Direct
154,168	2004-12-16	2013-12-16	No	4	M	Direct
72,759	2005-12-16	2013-12-16	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	2011-02-11	2011-02-11	50,569	50,569	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	96,034	96,034	Direct

Expiration Date	Amount	Remaning Holdings	Nature of Ownership
2011-02-11	50,569	50,569	Direct
2014-07-27	180,000	180,000	Direct
2015-12-13	200,000	200,000	Direct
2016-12-12	96,034	96,034	Direct

Footnotes

Ownership includes 540,000 shares of restricted stock subject to vesting requirements.
This sale is pursuant to a 10b5-1 Trading Plan established on February 15, 2012 and for diversification of assets for estate planning. The weighted average price for this transaction is reported within the form. Full information regarding the number of shares at each 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.