UNITED STATES
SECURITIES AND EXCHANGE COMMISSION

SCHEDULE 13D

INFORMATION TO BE INCLUDED IN STATEMENTS
FILED PURSUANT TO RULE 13d-1(a) AND AMENDMENTS
THERETO FILED PURSUANT TO RULE 13d-2(a)

(Amendment No.6)

DST Systems, Inc.

Common Stock, Par Value $0.01 Per Share

233326107

Douglas N. Beck
151 Detroit Street
Denver, Colorado 80206
(303) 691-3905
(303) 394-7714 (facsimile)

June 15, 2004

     If the filing person has previously filed a statement on Schedule 13G to report the acquisition that is the subject of this Schedule 13D, and is filing this schedule because of Rule 13d-1(e), 13d-1(f) or 13d-1(g), check the following box: o

     *The remainder of this cover page shall be filled out for a reporting person’s initial filing on this form with respect to the subject class of securities, and for any subsequent amendment containing information which would alter the disclosures provided in a prior cover page.

     The information required in the remainder of this cover page shall not be deemed to be “filed” for the purpose of Section 18 of the Securities Exchange Act of 1934 (“Act”) or otherwise subject to the liabilities of that section of the Act but shall be subject to all other provisions of the Act (however, see the Notes).

(Continued on following pages)
(Page 1 of 4 Pages)

Preliminary Statement

     This Amendment No. 6 to Schedule 13D (the “Amendment”) is filed on behalf of Janus Capital Group Inc. (“Janus”), a Delaware corporation formerly known as Stilwell Financial Inc. Reference is made to the initial statement on Schedule 13D filed on July 10, 2000, amended as of December 12, 2001, January 10, 2003, September 10, 2003, November 19, 2003 and December 10, 2003 (the “Janus Statement”). The Janus Statement is hereby further amended and supplemented as follows:

     Item 4. Purpose of Transaction

     The disclosure in Item 4 is hereby amended and supplemented by adding the following:

     On June 15, 2004, Janus sold its remaining 7,424,052 shares of DST Common Stock. Following this sale, Janus does not own any shares DST Common Stock.

     Item 5. Interest in Securities of the Issuer.

     Janus does not directly own any shares of Common Stock of DST.

     REPORTING PERSON

     (a) The responses to Items 11 and 13 of the inside cover page of this Schedule 13D are hereby incorporated by reference in response to paragraph (a) of this Item 5.

     (b) The responses to Items 7, 8, 9 and 10 of the inside cover page of this Schedule 13D are hereby incorporated by reference in response to paragraph (b) of this Item 5.

     (c) The Reporting Person had the following transactions in the Common Stock during the 60 days prior to the date of this Schedule:

     On June 15, 2004, Janus sold its remaining 7,424,052 shares of DST Common Stock at a price of $45.29 per share in a private transaction.

     (d) No person, other than the Reporting Person, has the right to receive or the power to direct the receipt of dividends from, or the proceeds of the sale of, the Common Stock.

     (e) Not applicable.

DIRECTORS AND EXECUTIVE OFFICERS

                                        *Less than one percent.

     None of the above named directors or executive officers have had any transactions in the Common Stock of DST during the 60 days prior to the date of this Schedule.

     No person, other than the respective directors or executive officers, has the right to receive or the power to direct the receipt of dividends from, or the proceeds of the sale of, the Common Stock beneficially owned by such director or officer.

SIGNATURE

     After reasonable inquiry and to the best of my knowledge and belief, I certify that the information set forth in this statement is true, complete and correct.

Dated: June 21, 2004