NEW YORK, Feb. 22 /PRNewswire/ -- S&P MidCap 400 constituent Helmerich & Payne Inc. (NYSE: HP) will replace IMS Health Inc. (NYSE: RX) in the S&P 500 index, S&P SmallCap 600 constituent Prosperity Bancshares Inc. (Nasdaq: PRSP) will replace Helmerich & Payne in the S&P MidCap 400, and Interactive Intelligence Inc. (Nasdaq: ININ) will replace Prosperity Bancshares in the S&P SmallCap 600 index after the close of trading on Friday, February 26. IMS Health is being acquired by affiliates of TPG Capital L.P. and the Canada Pension Plan Investment Board in a deal expected to be completed on or about that date, pending final conditions.

Standard & Poor's will monitor this transaction, and post any relevant updates on its website: www.standardandpoors.com.

Helmerich & Payne engages in the contract drilling of oil and gas wells. Headquartered in Tulsa, OK, the company will be added to the S&P 500 GICS (Global Industry Classification Standard) Oil & Gas Drilling Sub-Industry index.

Prosperity Bancshares provides retail and commercial banking services. Headquartered in Houston, TX, the company will be added to the S&P MidCap 400 GICS Regional Banks Sub-Industry index.

Interactive Intelligence provides software application suites for voice over Internet protocol (VoIP) business communications. Headquartered in Indianapolis, IN, the company will be added to the S&P SmallCap 600 GICS Application Software Sub-Industry index.

Following is a summary of the changes: 


       S&P  500 INDEX  -  February 26, 2010

                            GICS ECONOMIC      GICS SUB-
                COMPANY         SECTOR         INDUSTRY
                -------      -------------      ---------
              Helmerich
                   &                           Oil & Gas
     ADDED       Payne         Energy          Drilling
     -----    ----------       ------         ----------
                  IMS                        Health Care
    DELETED     Health       Health Care      Technology
    -------      ------      -----------      -----------




    S&P  MIDCAP 400 INDEX  -  February 26, 2010

                             GICS ECONOMIC      GICS SUB-
                COMPANY          SECTOR         INDUSTRY
                -------       -------------      ---------
              Prosperity                        Regional
     ADDED    Bancshares      Financials          Banks
     -----    -----------     ----------       ---------
               Helmerich
                   &                          Oil & Gas
    DELETED      Payne          Energy        Drilling
    -------   ----------        ------       ----------





    S&P  SMALLCAP 600 INDEX  -  February 26, 2010

                              GICS ECONOMIC      GICS SUB-
                 COMPANY          SECTOR         INDUSTRY
                 -------       -------------      ---------
              Interactive      Information     Application
     ADDED    Intelligence      Technology       Software
     -----    ------------    ------------    ------------
               Prosperity                        Regional
    DELETED    Bancshares      Financials          Banks
    -------   -----------      ----------       ---------

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