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Filing Details

Issuer

Cik	Name	Symbol	Sector (SIC)	IRS No
714603	Dst Systems Inc	DST	Services-Computer Processing & Data Preparation (7374)	431581814

Insiders

Cik	Name	Reported Address	Insider Title	Director	Officer	Large Shareholder	Other
1181860	C William Nelson	333 West 11Th Street Kansas City MO 64105		Yes	No	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	2012-05-10	5,000	$48.23	32,690	No	4	M	Direct
Common Stock	Disposition	2012-05-10	220	$53.18	32,470	No	4	F	Direct
Common Stock	Acquisiton	2012-05-10	9,270	$47.04	41,740	No	4	M	Direct
Common Stock	Disposition	2012-05-10	480	$53.18	41,260	No	4	F	Direct
Common Stock	Disposition	2012-05-14	14,270	$52.66	26,990	No	4	S	Direct

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

Reported Derivative Transactions

Sec. Name	Sec. Type	Acquisiton - Disposition	Date	Amount	Price	Amount - 2	Price - 2
Common Stock	Stock Option	Disposition	2012-05-10	5,000	$48.23	5,000	$48.23
Common Stock	Stock Option	Disposition	2012-05-10	9,270	$47.04	9,270	$47.04

Remaning Holdings	Exercise Date	Expiration Date	Equity Swap Involved	Transaction Form Type	Transaction Code	Nature of Ownership
0		2012-05-14	No	4	M	Direct
0	2005-06-11	2012-06-11	No	4	M	Direct

Footnotes

One-half became exercisable on May 12, 2003; one-fourth became exercisable on May 10, 2004; one-fourth became exercisable on May 9, 2005.
This transaction was executed in multiple trades at prices ranging from $52.44 to $52.89. The price reported above reflects the weighted average price. The reporting person hereby undertakes to provide upon request to the SEC staff, the issuer or a security holder of the issuer full information regarding the number of shares and prices at which the transactions were effected.