NEW YORK, June 25, 2012 /PRNewswire/ -- Seagate Technology plc (NASD:STX) will replace Progress Energy, Inc. (NYSE:PGN) in the S&P 500 index after the close of trading on Friday, June 29. S&P 500 constituent Duke Energy Corp. (NYSE:DUK) is acquiring Progress Energy in a deal expected to close soon pending final approvals.

Seagate Technology designs, manufactures, markets, and sells hard disk drives. Headquartered in Dublin, Ireland, the company will be added to the S&P 500 GICS (Global Industry Classification Standard) Computer Storage & Peripherals Sub-Industry index.

Following is a summary of the change:

                          S&P 500 INDEX  - June 29, 2012
                   COMPANY                  GICS ECONOMIC SECTOR      GICS SUB-INDUSTRY
                   -------                  --------------------      -----------------
      ADDED  Seagate Technology            Information Technology     Computer Storage &
      -----        ------------------          ----------------------    ------------------
     DELETED   Progress Energy                    Utilities           Electric Utilities
     -------   ---------------                    ---------           ------------------

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