425 Filing

Filed by AmSouth Bancorporation

Pursuant to Rule 425

under the Securities Act of 1933 and

deemed filed pursuant to Rule 14a-12 under

the Securities Exchange Act of 1934

Subject Company: AmSouth Bancorporation

Commission File No.: 1-7476

Forward Looking Statements

This document contains forward-looking statements made pursuant to the safe-harbor provisions of the Private Securities Litigation Act of 1995. These include statements as to the benefits of the proposed merger between Regions Financial and AmSouth (the “Merger”), including future financial and operating results, cost savings, enhanced revenues and the accretion/dilution to reported earnings that may be realized from the Merger as well as other statements of expectations regarding the Merger and any other statements regarding future results or expectations. These statements involve risks and uncertainties that may cause results to differ materially from those set forth in these statements. Regions Financial and AmSouth caution readers that results and events subject to forward-looking statements could differ materially due to the following factors, among others: the risk that the businesses of Regions Financial and/or AmSouth in connection with the Merger will not be integrated successfully or such integration may be more difficult, time-consuming or costly than expected; expected revenue synergies and cost savings from the Merger may not be fully realized or realized within the expected time frame; revenues following the Merger may be lower than expected; customer and employee relationships and business operations may be disrupted by the merger; the ability to obtain required governmental and stockholder approvals, and the ability to complete the merger on the expected timeframe; possible changes in economic and business conditions; the existence or exacerbation of general geopolitical instability and uncertainty; the ability of Regions Financial and AmSouth to integrate recent acquisitions and attract new customers; possible changes in monetary and fiscal policies, and laws and regulations; the effects of easing of restrictions on participants in the financial services industry; the cost and other effects of legal and administrative cases; possible changes in the credit worthiness of customers and the possible impairment of collectibility of loans; the effects of changes in interest rates and other risks and factors identified in each company’s filings with the Securities and Exchange Commission (the “SEC”). Regions Financial and AmSouth do not undertake any obligation to update any forward-looking statement, whether written or oral, relating to the matters discussed in this document.

Additional Information

The proposed Merger will be submitted to Regions Financial’s and AmSouth’s stockholders for their consideration. Regions Financial will file a registration statement, which will include a joint proxy statement/prospectus to be sent to each company’s stockholders, and each of Regions Financial and AmSouth may file other relevant documents concerning the proposed Merger with the SEC. Stockholders are urged to read the registration statement and the joint proxy statement/prospectus regarding the proposed Merger when they become available and any other relevant documents filed with the SEC, as well as any amendments or supplements to those documents, because they will contain important information. You will be able to obtain a free copy of the joint proxy statement/prospectus, as well as other filings containing information about Regions Financial and AmSouth, at the SEC’s Web site (http://www.sec.gov). You will also be able to obtain these documents, free of charge, by accessing Regions Financial’s website (http://www.Regions.com) under the tab “Investor Relations” and then under the heading “SEC Filings”, or by accessing AmSouth’s Web site (http://www.amsouth.com) under the tab “About AmSouth,” then under the tab “Investor Relations” and then under the heading “SEC Filings.”

Regions Financial and AmSouth and their respective directors and executive officers may be deemed to be participants in the solicitation of proxies from the stockholders of Regions Financial and/or AmSouth in connection with the proposed Merger. Information about the directors and executive officers of Regions Financial is set forth in the proxy statement for Regions Financial’s 2006 annual meeting of stockholders, as filed with the SEC on April 5, 2006. Information about the directors and executive officers of AmSouth is set forth in the proxy statement for AmSouth’s 2006 annual meeting of stockholders, as filed with the SEC on March 16, 2006. Additional information regarding the interests of those participants and other persons who may be deemed participants in the transaction may be obtained by reading the joint proxy statement/prospectus regarding the proposed Merger when it becomes available. You may obtain free copies of these documents as described above.

The following is a communication from AmSouth Bank to its Internet banking customers:

May 25, 2006


To: [name]

From: AmSouth Bank

Re: AmSouth Bank and Regions Bank Merger


On behalf of AmSouth’s Management Team and Board of Directors, we are excited and proud to let you know about our recently announced merger of equals with Regions.

The new combined company will be one of the top 10 largest bank holding companies in the United States, with a combined asset size of almost $140 billion and approximately 5 million households, which will continue to be served by a 16-state network of 2,000 branches and 2,800 ATMs.

As with any such announcement, you are probably wondering how it will affect you and your relationship. First, we believe this merger will make your relationship with AmSouth more convenient and beneficial to you. You can continue to expect the same great service from the same great people, everyday, as well as the convenience you’ve come to expect. We expect a smooth transition in the merger, but rest assured that if and when changes are made that impact you, we will communicate them in a timely way.

This is just the beginning. In the future, the combined strength of the two companies will provide our customers with more opportunities, comprehensive products and services and a better financial relationship.

The merger of AmSouth and Regions brings two of banking’s best together — building a stronger future for all we serve. If you have any immediate questions about the merger, you can email AmSouth Customer Service or you may also call 1-800-AMSOUTH.



C. Dowd Ritter

Chairman, President and CEO

AmSouth Bank