X0306 4 2012-08-17 false 0000714603 DST SYSTEMS INC DST 0001193825 TRITT ROBERT L 333 WEST 11TH STREET KANSAS CITY MO 64105 false true false false Executive Vice President Common Stock 29624 I ESOP Common Stock 2012-08-17 4 M false 62462 31.045 A 76894 D Common Stock 2012-08-17 4 F false 10766 51.455 D 66128 D Common Stock 2012-08-17 4 S false 31013 51.39 D 35115 D Common Stock 2012-08-20 4 S false 20683 51.21 D 14432 D Employee Stock Option 31.045 2012-08-17 4 M false 62462 0 D 2004-02-26 2012-11-01 Common Stock 62462 0 D 29,624 shares are allocated to the reporting persons' account in The Employee Stock Ownership Plan of Issuer. The acquisition is exempt pursuant to Rule 16b-3(c). This number is an aggregate of the number of shares of Issuer common stock that were withheld from the shares being purchased in order to satisfy the Reporting Person's tax withholding obligation. The withholding of shares ("Allowable Transactions") occurred in accordance with procedures of the Compensation Committee of the Issuer's Board of Directors, which approved the Reporting Person's Allowable Transactions at the time it granted the options to him. This transaction was executed in multiple trades at prices ranging from $51.25 to $51.53. 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. This transaction was executed in multiple trades at prices ranging from $51.0101 to $51.31. 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. Randall D. Young for Robert L. Tritt by power of attorney 2012-08-21