NEW YORK, July 30, 2015 /PRNewswire/ -- S&P MidCap 400 constituent TimkenSteel Corp. (NYSE: TMST) will replace Montpelier Re Holdings Ltd. (NYSE: MRH) in the S&P SmallCap 600, and Endurance Specialty Holdings Ltd. (NYSE: ENH) will replace TimkenSteel in the S&P MidCap 400 after the close of trading on Friday, July 31. Endurance Specialty Holdings is acquiring Montpelier Re Holdings in a deal expected to be completed on or about that date.

TimkenSteel manufactures and sells alloy steel, and carbon and micro-alloy steel products. Headquartered in Canton, OH, the company will be added to the S&P SmallCap 600 GICS (Global Industry Classification Standard) Steel Sub-Industry index.

Endurance Specialty Holdings underwrites specialty lines of personal and commercial property and casualty insurance and reinsurance. Headquartered in Pembroke, Bermuda, the company will be added to the S&P MidCap 400 GICS Reinsurance Sub-Industry index.

Following is a summary of the changes:



    S&P MIDCAP 400 INDEX - July 31, 2015
    ------------------------------------

                                COMPANY                      GICS ECONOMIC SECTOR GICS SUB-INDUSTRY
                                -------                      -------------------- -----------------

    ADDED                       Endurance Specialty Holdings Financials           Reinsurance
    -----                       ---------------------------- ----------           -----------

    DELETED                     TimkenSteel                  Materials            Steel
    -------                     -----------                  ---------            -----




    S&P SMALLCAP 600 INDEX - July 31, 2015
    --------------------------------------

                                COMPANY                GICS ECONOMIC SECTOR GICS SUB-INDUSTRY
                                -------                -------------------- -----------------

    ADDED                       TimkenSteel            Materials            Steel
    -----                       -----------            ---------            -----

    DELETED                     Montpelier Re Holdings Financials           Reinsurance
    -------                     ---------------------- ----------           -----------

Additions to and deletions from S&P Dow Jones Indices do not in any way reflect an opinion on the investment merits of the companies involved.

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