Standard & Poor's Announces Changes to U.S. Indices NEW YORK, April 26 /PRNewswire/ -- Standard & Poor's will make the following changes to the S&P MidCap 400 and S&P SmallCap 600 indices: * Anteon International Corp. (NYSE:ANT) will replace Ascential Software Corp. (NASD: ASCL) in the S&P MidCap 400 after the close of trading on a date to be announced. Ascential Software is being acquired by S&P 500 constituent International Business Machines Corp. (NYSE:IBM) in a deal that is subject to final approval. * Healthcare Services Group Inc. (NASD:HCSG) will replace Curative Health Services Inc. (NASD:CURE) in the S&P SmallCap 600 after the close of trading on Friday, April 29. After the close of trading on Monday, April 25, Curative Health Services had a market capitalization of approximately $24.6 million, ranking 600th in the index. As previously announced, all S&P index additions will be made at the added companies' full float-adjusted market capitalization weight. Standard & Poor's will monitor these transactions, and post any relevant updates on its website: http://www.standardandpoors.com/. Anteon International provides information technology solutions and systems engineering and integration services to government customers. Headquartered in Fairfax, VA, the company will be added to the S&P MidCap 400 GICS (Global Industry Classification Standard) IT Consulting & Other Services Sub-Industry Index. Healthcare Services Group provides housekeeping, laundry, linen, facility maintenance and food services to hospitals and other health care facilities. Headquartered in Bensalem, PA, the company will be added to the S&P SmallCap 600 Diversified Commercial Services Sub-Industry Index. Following is a summary of the changes: S&P MIDCAP 400 INDEX - TBA COMPANY GICS ECONOMIC SECTOR GICS SUB-INDUSTRY ADDED Anteon Information Technology IT Consulting & International Other Services DELETED Ascential Information Technology Systems Software Software S&P SMALLCAP 600 INDEX - April 29, 2005 COMPANY GICS ECONOMIC SECTOR GICS SUB-INDUSTRY ADDED Healthcare Industrials Diversified Commercial Services Group Services DELETED Curative Health Health Care Health Care Services Services Additions to and deletions from an S&P equity index do not in any way reflect an opinion on the investment merits of the companies concerned. About Standard & Poor's Standard & Poor's, a division of The McGraw-Hill Companies (NYSE:MHP), is the world's foremost provider of independent credit ratings, indices, risk evaluation, investment research, data and valuations. With 6,000 employees in 21 countries, Standard & Poor's is an essential part of the world's financial infrastructure, and has played a leading role for more than 140 years in providing investors with the independent benchmarks they need to feel more confident about their investment and financial decisions. For more information, visit http://www.standardandpoors.com/. Founded in 1888, The McGraw-Hill Companies is a leading global information services provider meeting worldwide needs in the financial services, education and business information markets through leading brands such as Standard & Poor's, BusinessWeek and McGraw-Hill Education. The Corporation has more than 280 offices in 37 countries. Sales in 2004 were $5.3 billion. Additional information is available at http://www.mcgraw-hill.com/. DATASOURCE: Standard & Poor's CONTACT: David M. Blitzer, Ph.D. Managing Director & Chairman of the Index Committee +1-212-438-3907 Web site: http://www.standardandpoors.com/ http://www.mcgraw-hill.com/

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