X0303 4 2010-05-11 0 0000714603 DST SYSTEMS INC DST 0001021089 ARGYROS GEORGE L ARNEL & AFFILIATES 949 SOUTH COAST DR SUITE 600 COSTA MESA CA 92626 1 0 1 0 Common Stock 2010-05-11 4 A 0 3196 0 A 4708357 I Argyros Family Trust Common Stock 4295500 I By HBI Financial, Inc. Common Stock 1686 I By GLA Financial Corporation Common Stock 900 I By the Leon & Olga Argyros 1986 Trust Common Stock 28125 I By the Argyros Children's Trust II fbo immediate family member Common Stock 215 I By The George T. Poulos Trust The securities were acquired pursuant to the DST Systems, Inc. 2005 Non-employee Directors' Award Plan as part of annual non-employee director compensation approved by the Board of Directors. These shares were previously reported as directly beneficially owned but were contributed to a trust of which Reporting Person is one of two co-trustees and, along with his spouse, a beneficiary. The reporting person disclaims beneficial ownership of these securities. Randall D. Young for George L. Argyros by power of attorney 2010-05-12