PNC Financial Services (PNC)

ADDITIONAL INFORMATION ABOUT THE PNC/MERCANTILE TRANSACTION

The PNC Financial Services Group, Inc. and Mercantile Bankshares Corporation 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.

TABULAR MATERIAL FOLLOWS