AS FILED WITH THE SECURITIES AND EXCHANGE COMMISSION ON AUGUST 17, 2007

                                                   1933 ACT FILE NO. 333-_____
                                                   1940 ACT FILE NO. 811-03763
===============================================================================

                       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 433

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:

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


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.

===============================================================================

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 AUGUST 17, 2007

               CLAYMORE SECURITIES DEFINED PORTFOLIOS, SERIES 433

                     10,000 Units (A Unit Investment Trust)


     The above-referenced series is comprised of the Strategic Income Portfolio
Plus, Series 6 (the "trust").

     The attached final prospectus for a prior series of the 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 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 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.

     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.

     Incorporated herein by reference are portions of the final prospectus for
Series 406 (Registration No. 333-143849) as filed on July 11, 2007, which
portions shall be used as the preliminary prospectus for the 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. 1 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 433 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 17th day of
August, 2007.

                                 CLAYMORE SECURITIES DEFINED PORTFOLIOS,
                                   SERIES 433, Registrant

                                 By:   CLAYMORE SECURITIES, INC., Depositor


                                       By:      /s/ Nicholas Dalmaso
                                            ------------------------------
                                                    Nicholas Dalmaso

     Pursuant to the requirements of the Securities Act of 1933, this
Registration Statement has been signed below on August 17, 2007 by the following
persons, who constitute a majority of the Board of Directors of Claymore
Securities, Inc.



                                                                           

     SIGNATURE*               TITLE**                                             DATE

                                                                             )     By:  /s/ Nicholas Dalmaso
                                                                             )          --------------------
                                                                             )              Nicholas Dalmaso
                                                                             )              Attorney-in-Fact*
                                                                             )
DAVID HOOTEN*                 Chief Executive Officer and Chairman of the    )               August 17, 2007
                              Board of Directors                             )
                                                                             )

MICHAEL RIGERT*               President and Director                         )               August 17, 2007

ANTHONY DILEONARDI*           Senior Managing Director                       )               August 17, 2007

BRUCE ALBELDA*                Chief Financial Officer and Director                           August 17, 2007

/S/ NICHOLAS DALMASO          General Counsel, Secretary and Senior                          August 17, 2007
- -------------------           Managing Director
    NICHOLAS DALMASO



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

*    An executed copy of the related power of attorney was filed as Exhibit 6.0
     to Registration Statement No. 333-142967 on May 15, 2007.

**   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 433

     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
August 17, 2007