NEW YORK, Dec. 15 /PRNewswire/ -- S&P MidCap 400 constituent Roper Industries Inc. (NYSE:ROP) will replace ENSCO International Inc. (NYSE:ESV) in the S&P 500, and tw telecom Inc. (NASDAQ:TWTC) will replace Roper Industries in the S&P MidCap 400 after the close of trading on Tuesday, December 22. ENSCO International is changing its legal domicile and relocating its corporate headquarters from the U.S. to the U.K., making it ineligible for continued inclusion in the S&P 500. Standard & Poor's will monitor this transaction, and post any relevant updates on its website: http://www.standardandpoors.com/. Roper makes high-tech industrial equipment and analytical instruments. Headquartered in Sarasota, FL, the company will be added to the S&P 500 GICS (Global Industry Classification Standard) Electrical Components & Equipment Sub-Industry index. tw telecom is a provider of managed network services. Headquartered in Littleton, CO, the company will be added to the S&P Midcap 400 GICS Alternative Carriers Sub-Industry index. Following is a summary of the changes: S&P 500 INDEX - December 22, 2009 ------------------------------------ GICS ECONOMIC GICS SUB- COMPANY SECTOR INDUSTRY ------- ------------- --------- Electrical Roper Components & ADDED Industries Industrials Equipment ----- ---------- ----------- ------------ ENSCO Oil & Gas DELETED International Energy Drilling ------- ------------- ------ --------- S&P MIDCAP 400 INDEX - December 22, 2009 -------------------------------------- GICS ECONOMIC GICS SUB- COMPANY SECTOR INDUSTRY ------- ------------- --------- tw Telecommunication Alternative ADDED telecom Services Carriers ----- ------- ----------------- ----------- Electrical Roper Components & DELETED Industries Industrials Equipment ------- ---------- ----------- ------------ For more information about S&P Indices, please visit http://www.standardandpoors.com/indices. About S&P Indices S&P Indices, the world's leading index provider, maintains a wide variety of investable and benchmark indices to meet an array of investor needs. Over $1 trillion is directly indexed to Standard & Poor's family of indices, which includes the S&P 500, the world's most followed stock market index, the S&P Global 1200, a composite index comprised of seven regional and country headline indices, the S&P Global BMI, an index with approximately 11,000 constituents, and the S&P GSCI, the industry's most closely watched commodities index. For more information, please visit http://www.standardandpoors.com/indices. About Standard & Poor's Standard & Poor's, a subsidiary of The McGraw-Hill Companies (NYSE:MHP), is the world's foremost provider of independent credit ratings, indices, risk evaluation, investment research and data. With offices in 23 countries and markets, Standard & Poor's is an essential part of the world's financial infrastructure and has played a leading role for nearly 150 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/ 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/

Copyright