Filed by Banco Santander Central Hispano, S.A.

This communication is filed pursuant to Rule 425 under The Securities Act of 1933, as amended.

Subject Company: ABN AMRO Holding N.V.

Commission File Number: 001-12518

Date: July 5, 2007

On July 5, 2007, Fortis, Royal Bank of Scotland and Santander issued the following joint press release:

5 July 2007 — Fortis, RBS and Santander Announcement

Fortis, RBS and Santander (collectively, the “Banks”) were required under the Dutch offer rules to publish offer documentation during a 6 week period (referred to in article 9g(3) of the Dutch Decree on the Supervision of the Securities Trade 1995) which commenced on the announcement of the proposed offer on 29 May 2007 and expires on 10 July 2007. As stated in the Banks’ announcement of 29 May 2007, the Autoriteit Financiële Markten (“AFM”) had granted an extension of this period and the duration of this extension would be determined in the week of 2 July 2007. Taking into account that, whilst good progress is being made, the review processes by the relevant market regulators relating to the documentation of the proposed offer have not yet been completed, the AFM has now determined that the extension will expire on 23 July 2007. As indicated in their announcement of 22 June 2007, the Banks expect to publish offer documentation by mid-July.

Important Information

This announcement is made pursuant to article 9b(1) of the Dutch Decree on the Supervision of the Securities Trade 1995.

In connection with the proposed offer for ABN AMRO, RBS expects to file with the U.S. SEC a Registration Statement on Form F-4, which will constitute a prospectus, and the Banks expect to file with the SEC a Tender Offer Statement on Schedule TO and other relevant materials. INVESTORS ARE URGED TO READ ANY DOCUMENTS REGARDING THE PROPOSED OFFER IF AND WHEN THEY BECOME AVAILABLE, BECAUSE THEY WILL CONTAIN IMPORTANT INFORMATION. Investors will be able to obtain a copy of such documents, without charge, at the SEC’s website (http://www.sec.gov) once such documents are filed with the SEC. Copies of such documents may also be obtained from each Bank, without charge, once they are filed with the SEC.

This communication shall not constitute an offer to sell or the solicitation of an offer to buy any securities, nor shall there be any sale of securities in any jurisdiction in which such offer, solicitation or sale would be unlawful prior to registration or qualification under the securities laws of any such jurisdiction. This press release is not an offer of securities for sale into the United States. No offering of securities shall be made in the United States except pursuant to registration under the US Securities Act of 1933, as amended, or an exemption therefrom.

Forward-Looking Statements

This announcement includes certain “forward-looking statements”. These statements are based on the current expectations of the Banks and are naturally subject to uncertainty and changes in certain circumstances. Forward-looking statements include any statements related to the benefits or synergies resulting from a transaction with ABN AMRO and, without limitation, statements typically containing words such as “intends”, “expects”, “anticipates”, “targets”, “plans”, “estimates” and words of similar import. By their nature, forward-looking statements involve risk and uncertainty because they relate to events and depend on circumstances that will occur in the future. There are a number of factors that could cause actual results and developments to differ materially from those expressed or implied by such forward-looking statements. These factors include, but are not limited to, the presence of a competitive offer for ABN AMRO, satisfaction of any pre-conditions or conditions to the proposed offer, including the receipt of required regulatory and anti-trust approvals, the successful completion of the offer or any subsequent compulsory acquisition procedure, the anticipated benefits of the proposed offer (including anticipated synergies) not being realized, the separation and integration of ABN AMRO and its assets among the Banks and the integration of such businesses and assets by the Banks being materially delayed or more costly or difficult than expected, as well as additional factors, such as changes in economic conditions, changes in the regulatory environment, fluctuations in interest and exchange rates, the outcome of litigation and government actions. Other unknown or unpredictable factors could cause actual results to differ materially from those in the forward-looking statements. None of the Banks undertake any obligation to update publicly or revise forward-looking statements, whether as a result of new information, future events or otherwise, except to the extent legally required.

Any offer made in or into the United States will only be made by the Banks and/or RFS Holdings directly or by a dealer-manager that is registered with the SEC.

Fortis N.V., Archimedeslaan 6, 3584 BA Utrecht, Netherlands; Fortis SA/NV, Rue Royale 20, 1000 Brussels, Belgium

The Royal Bank of Scotland Group plc, Head Office, Gogarburn, Edinburgh EH12 1HQ, UK. Registered Office, 36 St Andrew Square, Edinburgh EH2 2YB. Registered in Scotland No 45551

Banco Santander Central Hispano, S.A., Ciudad Grupo Santander, Avenida de Cantabria, s/n, 28660 Boadilla del Monte, Madrid, Spain