QuickLinks -- Click here to rapidly navigate through this document

As filed with the U.S. Securities and Exchange Commission on April 18, 2005

Registration No. 333-109606



SECURITIES AND EXCHANGE COMMISSION
Washington, D.C. 20549


POST-EFFECTIVE AMENDMENT NO. 1 TO
FORM F-6
REGISTRATION STATEMENT UNDER THE SECURITIES ACT OF 1933
For Depositary Shares Evidenced by American Depositary Receipts


Rinker Group Limited
ABN 53 003 433 118
(Exact name of issuer of deposited securities as specified in its charter)

Not applicable
(Translation of issuer's name into English)

New South Wales, Australia
(Jurisdiction of incorporation or organization of issuer)

JPMorgan Chase Bank, N.A.
(Exact name of depositary as specified in its charter)

4 New York Plaza, New York, NY 10081
Telephone (212) 623-0636
(Address, including zip code, and telephone number, including area code, of depositary's principal executive offices)


Tom Burmeister
Chief Financial Officer
Rinker Group Limited
c/o Rinker Materials Corporation
1501 Belvedere Road
West Palm Beach, Florida 33406
(800) 226-5521
(Address, including zip code, and telephone number, including area code, of agent for service)

Copy to:

Scott A. Ziegler, Esq.
Ziegler, Ziegler & Associates LLP
570 Lexington Avenue, 44th Floor
New York, New York 10022
(212) 319-7600

It is proposed that this filing become effective under Rule 466

        If a separate registration statement has been filed to register the deposited shares, check the following box.    o

CALCULATION OF REGISTRATION FEE


Title of each class of
Securities to be registered

  Amount to
be registered

  Proposed maximum
aggregate price
per unit

  Proposed maximum
aggregate
offering price

  Amount of
registration fee


American Depositary Shares evidenced by American Depositary Receipts, each American Depositary Share representing five ordinary shares of Rinker Group Limited   N/A   N/A   N/A   N/A





PART I
INFORMATION REQUIRED IN PROSPECTUS

        The Prospectus consists of the proposed form of American Depositary Receipt ("ADR" or "American Depositary Receipt") included as Exhibit A to the Amendment to Deposit Agreement filed as Exhibit (a)(2) to this Post-Effective Amendment to Registration Statement on Form F-6, which is incorporated herein by reference.

CROSS REFERENCE SHEET

Item 1.    DESCRIPTION OF SECURITIES TO BE REGISTERED

Item Number and Caption

  Location in Form of American Depositary
Receipt Filed Herewith as Prospectus

(1)   Name and address of Depositary   Introductory paragraph
(2)   Title of American Depositary Receipts and identity of deposited securities   Face of American Depositary Receipt, top center
    Terms of Deposit:    
    (i)   Amount of deposited securities represented by one unit of American Depositary Shares   Face of American Depositary Receipt, upper right corner
    (ii)   Procedure for voting, if any, the deposited securities   Paragraph (12)
    (iii)   Collection and distribution of dividends   Paragraphs (4), (5), (7) and (10)
    (iv)   Transmission of notices, reports and proxy soliciting material   Paragraphs (3), (8) and (12)
    (v)   Sale or exercise of rights   Paragraphs (4), (5) and (10)
    (vi)   Deposit or sale of securities resulting from dividends, splits or plans of reorganization   Paragraphs (4), (5), (10) and (13)
    (vii)   Amendment, extension or termination of the Deposit Agreement   Paragraphs (16) and (17)
    (viii)   Rights of holders of receipts to inspect the transfer books of the Depositary and the list of Holders of receipts   Paragraph (3)
    (ix)   Restrictions upon the right to deposit or withdraw the underlying securities   Paragraphs (1), (2), (4), and (5)
    (x)   Limitation upon the liability of the Depositary   Paragraph (14)
(3)   Fees and Charges   Paragraph (7)

Item 2.    AVAILABLE INFORMATION

Item Number and Caption

  Location in Form of American Depositary
Receipt Filed Herewith as Prospectus

(b)   Statement that Rinker Group Limited is subject to the periodic reporting requirements of the Securities Exchange Act of 1934, as amended, and, accordingly, files certain reports with the Securities and Exchange Commission   Paragraph (8)


PART II
INFORMATION NOT REQUIRED IN PROSPECTUS

Item 3.    EXHIBITS

    (a)(1) Form of Deposit Agreement. Form of Deposit Agreement dated as of            , 2003 among Rinker Group Limited, JPMorgan Chase Bank, N.A., as depositary (the "Depositary"), and all holders from time to time of ADRs issued thereunder (the "Deposit Agreement"). Previously filed as Exhibit (a) to Registration Statement No. 333-109606.

 

 

(a)(2)

Form of Amendment to Deposit Agreement. Form of Amendment to Deposit Agreement, including the Form of American Depositary Receipt, is filed herewith as Exhibit (a)(2).

 

 

(b)

Any other agreement to which the Depositary is a party relating to the issuance of the American Depositary Shares registered hereunder or the custody of the deposited securities represented thereby. Not Applicable.

 

 

(c)

Every material contract relating to the deposited securities between the Depositary and the issuer of the deposited securities in effect at any time within the last three years. Not Applicable.

 

 

(d)

Opinion of Ziegler, Ziegler & Associates LLP, counsel to the Depositary, as to the legality of the securities being registered. Previously filed as Exhibit (d) to Registration Statement No. 333-109606 and incorporated herein by reference.

 

 

(e)

Certification under Rule 466. Filed herewith as Exhibit (e).

 

 

(f)

Power of Attorney. Previously filed as Exhibit (f) to Registration Statement No. 333-109606 and incorporated herein by reference.

Item 4.    UNDERTAKINGS

    (a) The Depositary hereby undertakes to make available at the principal office of the Depositary in the United States, for inspection by holders of the American Depositary Receipts, any reports and communications received from the issuer of the deposited securities which are both (1) received by the Depositary as the holder of the deposited securities, and (2) made generally available to the holders of the underlying securities by the issuer.
    (b) If the amounts of fees charged are not disclosed in the prospectus, the Depositary undertakes to prepare a separate document stating the amount of any fee charged and describing the service for which it is charged and to deliver promptly a copy of such fee schedule without charge to anyone upon request. The Depositary undertakes to notify each registered holder of an American Depositary Receipt thirty days before any change in the fee schedule.


SIGNATURE

        Pursuant to the requirements of the Securities Act of 1933, as amended, JPMorgan Chase Bank, N.A., on behalf of the legal entity created by the Deposit Agreement, certifies that it has reasonable grounds to believe that all the requirements for filing on Form F-6 are met and has duly caused this Post-Effective Amendment to Registration Statement on Form F-6 to be signed on its behalf by the undersigned, thereunto duly authorized, in The City of New York, State of New York, on Apri1 14, 2005.

    Legal entity created by the form of Deposit Agreement for the issuance of ADRs evidencing American Depositary Shares

 

 

By:

 

JPMORGAN CHASE BANK, N.A., as Depositary

 

 

By:

 

/s/  
JOSEPH M. LEINHAUSER      
    Name:   Joseph M. Leinhauser
    Title:   Vice President


SIGNATURES

        Pursuant to the requirements of the Securities Act of 1933, Rinker Group Limited certifies that it has reasonable grounds to believe that all the requirements for filing on Form F-6 are met and has duly caused this Post-Effective Amendment to Registration Statement on Form F-6 to be signed on its behalf by the undersigned, thereunto duly authorized, on April 14, 2005.

    RINKER GROUP LIMITED

 

 

By:

 

/s/  
TOM BURMEISTER      
    Name:   Tom Burmeister
    Title:   Chief Financial Officer

        Pursuant to the requirements of the Securities Act of 1933, as amended, this Post-Effective Amendment to Registration Statement on Form F-6 has been signed by the following persons in the capacities indicated as of April 14, 2005.

Signatures

  Title
     
*
  David Clarke
(Principal Executive Officer and Director)

/s/  
TOM BURMEISTER      

 

Tom Burmeister
(Principal Financial and Accounting Officer and
Authorized Representative in the United States)

*


 

John Morschel
Chairman of the Board of Directors

*


 

John Arthur
Director

*


 

Marshall Criser
Deputy Chairman, Director

*


 

John Ingram
Director

*


 

Walter Revell
Director

*By:

 

/s/  
TOM BURMEISTER      

 

 

 

 
Name:   Tom Burmeister        
Title:   Attorney-in-Fact        


INDEX TO EXHIBITS

Exhibit
Number

   
(a)(2)   Form of Amendment to Deposit Agreement.
(e)   Rule 466 Certification



QuickLinks

PART I INFORMATION REQUIRED IN PROSPECTUS
PART II INFORMATION NOT REQUIRED IN PROSPECTUS
SIGNATURE
SIGNATURES
INDEX TO EXHIBITS