PNC Financial Services (PNC)

Additional Information About The PNC/Mercantile Transaction

The PNC Financial Services Group, Inc. and Mercantile Bankshares Corporation have filed a proxy statement/prospectus and other relevant documents concerning the merger with the United States Securities and Exchange Commission (the “SEC”). WE URGE INVESTORS TO READ THE PROXY STATEMENT/PROSPECTUS AND ANY OTHER DOCUMENTS FILED WITH THE SEC IN CONNECTION WITH THE MERGER OR INCORPORATED BY REFERENCE IN THE PROXY STATEMENT/PROSPECTUS BECAUSE THEY CONTAIN IMPORTANT INFORMATION.

Investors may obtain these documents free of charge at the SEC’s website (www.sec.gov). In addition, documents filed with the SEC by The PNC Financial Services Group, Inc. are available free of charge from Shareholder Relations at (800) 843-2206. Documents filed with the SEC by Mercantile Bankshares are available free of charge from Mercantile Bankshares Corporation, 2 Hopkins Plaza, P.O. Box 1477, Baltimore, Maryland 21203, Attention: Investor Relations.

The directors, executive officers, and certain other members of management and employees of Mercantile Bankshares Corporation are participants in the solicitation of proxies in favor of the merger from the shareholders of Mercantile Bankshares Corporation. Information about the directors and executive officers of Mercantile Bankshares Corporation is set forth in the proxy statement for its 2006 annual meeting of shareholders, which was filed with the SEC on March 29, 2006. Additional information regarding the interests of such participants is included in the proxy statement/prospectus filed with the SEC.

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Additional Information About The PNC/Mercantile Transaction

The PNC Financial Services Group, Inc. and Mercantile Bankshares Corporation (“Mercantile Bankshares”) will be filing a proxy statement/prospectus and other relevant documents concerning the PNC/Mercantile merger transaction with the United States Securities and Exchange Commission (the “SEC”). SHAREHOLDERS ARE URGED TO READ THE PROXY STATEMENT/PROSPECTUS AND ANY OTHER DOCUMENTS TO BE FILED WITH THE SEC IN CONNECTION WITH THE MERGER TRANSACTION OR INCORPORATED BY REFERENCE IN THE PROXY STATEMENT/PROSPECTUS WHEN THEY BECOME AVAILABLE, BECAUSE THEY WILL CONTAIN IMPORTANT INFORMATION. Shareholders will be able to obtain free copies of the proxy statement/prospectus, as well as other filings containing information about Mercantile Bankshares and PNC, without charge, at the SEC’s Internet site (http://www.sec.gov). In addition, documents filed with the SEC by The PNC Financial Services Group, Inc. will be available free of charge from Shareholder Relations at (800) 843-2206. Documents filed with the SEC by Mercantile Bankshares will be available free of charge from Mercantile Bankshares Corporation, 2 Hopkins Plaza, P.O. Box 1477, Baltimore, Maryland 21203, Attention: Investor Relations.

Mercantile Bankshares and its directors and executive officers and certain other members of management and employees are expected to be participants in the solicitation of proxies from Mercantile Bankshares’ shareholders in respect of the proposed merger transaction. Information regarding the directors and executive officers of Mercantile Bankshares is available in the proxy statement for its May 9, 2006 annual meeting of shareholders, which was filed with the SEC on March 29, 2006. Additional information regarding the interests of such potential participants will be included in the proxy statement/prospectus relating to the merger transaction and the other relevant documents filed with the SEC when they become available.

Additional Information About The PNC/Mercantile Transaction

The PNC Financial Services Group, Inc. and Mercantile Bankshares Corporation (“Mercantile Bankshares”) will be filing a proxy statement/prospectus and other relevant documents concerning the PNC/Mercantile merger transaction with the United States Securities and Exchange Commission (the “SEC”). SHAREHOLDERS ARE URGED TO READ THE PROXY STATEMENT/PROSPECTUS AND ANY OTHER DOCUMENTS TO BE FILED WITH THE SEC IN CONNECTION WITH THE MERGER TRANSACTION OR INCORPORATED BY REFERENCE IN THE PROXY STATEMENT/PROSPECTUS WHEN THEY BECOME AVAILABLE, BECAUSE THEY WILL CONTAIN IMPORTANT INFORMATION. Shareholders will be able to obtain free copies of the proxy statement/prospectus, as well as other filings containing information about Mercantile Bankshares and PNC, without charge, at the SEC’s Internet site (http://www.sec.gov). In addition, documents filed with the SEC by The PNC Financial Services Group, Inc. will be available free of charge from Shareholder Relations at (800) 843-2206. Documents filed with the SEC by Mercantile Bankshares will be available free of charge from Mercantile Bankshares Corporation, 2 Hopkins Plaza, P.O. Box 1477, Baltimore, Maryland 21203, Attention: Investor Relations.

Mercantile Bankshares and its directors and executive officers and certain other members of management and employees are expected to be participants in the solicitation of proxies from Mercantile Bankshares’ shareholders in respect of the proposed merger transaction. Information regarding the directors and executive officers of Mercantile Bankshares is available in the proxy statement for its May 9, 2006 annual meeting of shareholders, which was filed with the SEC on March 29, 2006. Additional information regarding the interests of such potential participants will be included in the proxy statement/prospectus relating to the merger transaction and the other relevant documents filed with the SEC when they become available.