AS FILED WITH THE SECURITIES AND EXCHANGE COMMISSION ON JUNE 30, 2009

                                                 1933 ACT FILE NO. 333-_________
                                                   1940 ACT FILE NO. 811 - 03763

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                       SECURITIES AND EXCHANGE COMMISSION
                             WASHINGTON, D.C. 20549

                             -----------------------

                            REGISTRATION STATEMENT ON
                                    FORM S-6

                             -----------------------

                FOR REGISTRATION UNDER THE SECURITIES ACT OF 1933
                     OF SECURITIES OF UNIT INVESTMENT TRUSTS
                            REGISTERED ON FORM N-8B-2

     A.   EXACT NAME OF TRUST: CLAYMORE SECURITIES DEFINED PORTFOLIOS,
          SERIES 600

     B.   NAME OF DEPOSITOR: CLAYMORE SECURITIES, INC.

     C.   COMPLETE ADDRESS OF DEPOSITOR'S PRINCIPAL EXECUTIVE OFFICES:

                            Claymore Securities, Inc.
                            2455 Corporate West Drive
                              Lisle, Illinois 60532

     D.   NAME AND COMPLETE ADDRESS OF AGENT FOR SERVICE:

Copies to:

    KEVIN ROBINSON, ESQ.                         ERIC F. FESS
    Senior Managing Director, General            Chapman and Cutler LLP
    Counsel and Secretary                        111 West Monroe Street
    Claymore Securities, Inc.                    Chicago, Illinois 60603
    2455 Corporate West Drive                    (312) 845-3000
    Lisle, Illinois  60532
    (630) 505-3736


It is proposed that this filing will become effective (check appropriate box)

/ /      immediately upon filing pursuant to paragraph (b)

/ /      on (date) pursuant to paragraph (b)

/ /      60 days after filing pursuant to paragraph (a)

/ /      on (date) pursuant to paragraph (a) of rule 485 or 486

/ /      This post-effective amendment designates a new effective date for a
         previously filed post-effective amendment.

     E.  TITLE OF SECURITIES BEING REGISTERED: Units of fractional undivided
         beneficial interest.

     F.  APPROXIMATE DATE OF PROPOSED SALE TO PUBLIC: As soon as practicable
         after the effective date of the Registration Statement.

/ /      Check box if it is proposed that this filing will become effective on
         (date) at (time) pursuant to Rule 487.

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     The registration hereby amends this Registration Statement on such date or
dates as may be necessary to delay its effective date until the registrant shall
file a further amendment which specifically states that this Registration
Statement shall thereafter become effective in accordance with Section 8(a) of
the Securities Act of 1933 or until the Registration Statement shall become
effective on such date as the Commission, acting pursuant to said Section 8(a)
may determine.



                   PRELIMINARY PROSPECTUS DATED JUNE 30, 2009

               CLAYMORE SECURITIES DEFINED PORTFOLIOS, SERIES 600

                     Zacks SMID Select Portfolio, Series 16
                         (the "Zacks SMID Select Trust")

                        S&P Foundation Strategy, Series 4
                      (the "S&P Foundation Strategy Trust")

                            (A Unit Investment Trust)


     The above-referenced series is comprised of the Zacks SMID Select
Portfolio, Series 16 and S&P Foundation Strategy, Series 4 (each, a "trust" and
together, the "trusts").

     The attached final prospectus for the prior series of each respective trust
is hereby used as the preliminary prospectus for the above-referenced Series.
The narrative information and structure of the attached final prospectus will be
substantially similar to that of the final prospectus for each trust in this
Series. Information with respect to pricing, the number of units, dates and
summary information regarding the characteristics of securities to be deposited
in this Series is not available as of this date and will be different because
each series has a unique portfolio. Accordingly, the information contained
herein with regard to the previous series of each trust should be considered as
being included for informational purposes only. Ratings of the securities in
this Series are expected to be comparable to those of the securities deposited
in the previous series of each trust.

     The registration statement relating to the units of this Series is not
complete, may be changed and is not yet effective. Information contained herein
is subject to completion or amendment. The units of this Series may neither be
sold nor may an offer to buy such units be accepted prior to the time the
registration statement becomes effective. This prospectus shall neither
constitute an offer to sell nor be considered a solicitation of an offer to buy
the units. There shall be no sale of the units in any state in which such offer,
solicitation or sale would be unlawful prior to registration or qualification
under the securities laws of any such state.

     For purposes of the Zacks SMID Select Trust, incorporated herein by
reference is the final prospectus for Series 587 (Registration No. 333-158840)
as filed on May 1, 2009, which shall be used as the preliminary prospectus for
such Zacks SMID Select Trust. For purposes of the S&P Foundation Strategy Trust,
incorporated herein by reference is the final prospectus for Series 578
(Registration No. 333-158565) as filed on May 1, 2009, which shall be used as
the preliminary prospectus for such S&P Foundation Strategy Trust.

                       CONTENTS OF REGISTRATION STATEMENT

     A.   Bonding Arrangements of Depositor:

     The Depositor has obtained the following Securities Dealer Blanket Bond for
its officers, directors and employees:

              INSURER/POLICY NO.                         AMOUNT

         National Union Fire Insurance
      Company of Pittsburgh, Pennsylvania               $250,000
                   959-9000

     This Registration Statement comprises the following papers and documents.

                  The Facing Sheet
                  The Prospectus
                  The Signatures
                  Consents of Counsel

     The following exhibits:

     1.1  Reference Trust Agreement (to be supplied by amendment).

    1.1.1 Standard Terms and Conditions of Trust (Reference is made to Exhibit
          1.1.1 to Amendment No. 2 to the Registration Statement on Form S-6 for
          Claymore Securities Defined Portfolios, Series 116 (File No. 333-72828
          filed on December 18, 2001).

     2.1  Code of Ethics (Reference is made to Exhibit 2.1 to the Registration
          Statement on Form S-6 for Claymore Securities Deferred Portfolios,
          Series 213 (File No. 333-122184 filed on February 9, 2005).

     3.1  Opinion of counsel as to legality of the securities being registered
          including a consent to the use of its name in the Registration
          Statement (to be supplied by amendment).

     3.2  Opinion of counsel as to Federal Income tax status of the securities
          being registered including a consent to the use of its name in the
          Registration Statement (to be supplied by amendment).

     3.3  Opinion of counsel as to New York Income tax status of the securities
          being registered including a consent to the use of its name in the
          Registration Statement (to be supplied by amendment).

     3.4  Opinion of counsel as to the Trustee and the Trust (s) including a
          consent to the use of its name in the Registration Statement (to be
          supplied by amendment).

     4.1  Consent of Independent Registered Public Accounting Firm (to be
          supplied by amendment).

                                   SIGNATURES

     Pursuant to the requirements of the Securities Act of 1933, the Registrant,
Claymore Securities Defined Portfolios, Series 600 has duly caused this
Registration Statement to be signed on its behalf by the undersigned thereunto
duly authorized, in the City of Lisle, and State of Illinois, on the 30th day of
June, 2009.

                              CLAYMORE SECURITIES DEFINED PORTFOLIOS, SERIES 600
                                                                      Registrant

                                                   By: CLAYMORE SECURITIES, INC.
                                                                       Depositor


                                                          By: /s/ Kevin Robinson
                                                         -----------------------
                                                                  Kevin Robinson

     Pursuant to the requirements of the Securities Act of 1933, this
Registration Statement has been signed below on June 30, 2009 by the following
persons, who constitute a majority of the Board of Directors of Claymore
Securities, Inc.



     SIGNATURE*                         TITLE***                               DATE
                                                                                 
CHRISTIAN MAGOON**                      President                         )    By:    /s/ Kevin Robinson
                                                                                      ------------------
                                                                          )               Kevin Robinson
                                                                          )               Attorney-in-Fact*
                                                                          )
DAVID HOOTEN*                           Chief Executive Officer and       )           June 30, 2009
                                        Chairman of the Board of          )
                                        Directors                         )

MICHAEL RIGERT*                         Vice Chairman                     )           June 30, 2009

ANTHONY DILEONARDI*                     Vice Chairman                     )           June 30, 2009

BRUCE ALBELDA*                          Chief Financial Officer and                   June 30, 2009
                                        Director
/s/ Kevin Robinson
KEVIN ROBINSON                          Senior Managing Director,                     June 30, 2009
                                        General Counsel and Secretary

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     *    An executed copy of the related power of attorney was filed as Exhibit
          6.0 to Registration Statement No. 333-149523 on April 9, 2008.

     **   An executed copy of the related power of attorney was filed as Exhibit
          6.0 to Registration Statement No. 333-150840 on June 2, 2008.

     ***  The titles of the persons named herein represent their capacity in and
          relationship to Claymore Securities, Inc., the Depositor.



            CONSENT OF INDEPENDENT REGISTERED PUBLIC ACCOUNTING FIRM

     The consent of Grant Thornton LLP to the use of its report and to the
reference to such firm in the Prospectus included in the Registration Statement
will be filed as Exhibit 4.1 to the Registration Statement.

                        CONSENT OF CHAPMAN AND CUTLER LLP

     The consent of Chapman and Cutler LLP to the use of its name in the
Prospectus included in the Registration Statement will be contained in its
opinions to be filed as Exhibits 3.1 and 3.2 to the Registration Statement.

                         CONSENT OF DORSEY & WHITNEY LLP

     The consent of Dorsey & Whitney LLP to the use of its name in the
Prospectus included in the Registration Statement will be contained in its
opinions to be filed as Exhibits 3.3 and 3.4 to the Registration Statement.

                                   MEMORANDUM

             Re: Claymore Securities Defined Portfolios, Series 600

         The list of securities comprising the trust of the fund, the
evaluation, record and distribution dates and other changes pertaining
specifically to the new series, such as size and number of units of the trust in
the fund and the statement of financial condition of the new fund will be filed
by amendment.

                                    1940 ACT

                              FORMS N-8A AND N-8B-2

     Form N-8A and Form N-8B-2 were filed in respect of Claymore Securities
Defined Portfolios, Series 116 (and subsequent series) (File No. 811-03763).

                                    1933 ACT

                                  THE INDENTURE

     The form of the proposed Standard Terms and Conditions of Trust is expected
to be in all respects consistent with the form of the Standard Terms and
Conditions of Trust dated December 18, 2001 relative to Claymore Securities
Defined Portfolios, Series 116.

                                                          CHAPMAN AND CUTLER LLP

Chicago, Illinois
June 30, 2009