NEW YORK, June 29, 2016 /PRNewswire/ -- S&P MidCap 400 constituent Alliant Energy Corp. (NYSE: LNT) will replace AGL Resources Inc. (NYSE: GAS) in the S&P 500, S&P SmallCap 600 constituent Southwest Gas Corp. (NYSE: SWX) will replace Alliant Energy in the S&P MidCap 400, and Shutterstock Inc. (NYSE: SSTK) will replace Southwest Gas in the S&P SmallCap 600 after the close of trading on Thursday, June 30. S&P 100 & 500 constituent Southern Co. (NYSE: SO) is acquiring AGL Resources in a deal expected to be completed soon, pending final conditions.

Alliant Energy provides regulated electricity and natural gas services to residential, commercial, industrial, and wholesale customers. Headquartered in Madison, WI, the company will be added to the S&P 500 GICS (Global Industry Classification Standard) Electric Utilities Sub-Industry index.

Southwest Gas purchases, distributes, and transports natural gas. Headquartered in Las Vegas, NV, the company will be added to the S&P MidCap 400 GICS Gas Utilities Sub-Industry index.

Shutterstock provides content products and services, and offers digital imagery services used in visual communications. Headquartered in New York, NY, the Company will be added to the S&P SmallCap 600 GICS Internet Software & Services Sub-Industry index.

Following is a summary of the changes:



                     S&P 500 INDEX - June 30, 2016
                     -----------------------------

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

      ADDED  Alliant Energy                    Utilities      Electric Utilities
      -----  --------------                    ---------      ------------------

     DELETED  AGL Resources                    Utilities        Gas Utilities
     -------  -------------                    ---------        -------------



                 S&P MIDCAP 400 INDEX - June 30, 2016
                 ------------------------------------

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

      ADDED   Southwest Gas                    Utilities        Gas Utilities
      -----   -------------                    ---------        -------------

     DELETED Alliant Energy                    Utilities      Electric Utilities
     ------- --------------                    ---------      ------------------



                   S&P SMALLCAP 600 INDEX - June 30, 2016
                   --------------------------------------

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

         ADDED  Shutterstock                 Information Technology Internet Software &
                                                                          Services
    ---                                                                   --------

        DELETED Southwest Gas                       Utilities          Gas Utilities
        ------- -------------                       ---------          -------------

For more information about S&P Dow Jones Indices, please visit www.spdji.com

ABOUT S&P DOW JONES INDICES

S&P Dow Jones Indices is the largest global resource for essential index-based concepts, data and research, and home to iconic financial market indicators, such as the S&P 500® and the Dow Jones Industrial Average®. More assets are invested in products based on our indices than based on any other provider in the world. With over 1,000,000 indices and more than 120 years of experience constructing innovative and transparent solutions, S&P Dow Jones Indices defines the way investors measure and trade the markets.

S&P Dow Jones Indices is a division of S&P Global (NYSE: SPGI), which provides essential intelligence for individuals, companies, and governments to make decisions with confidence. For more information, visit www.spdji.com.

FOR MORE INFORMATION:

David Blitzer
Managing Director and Chairman of the Index Committee
New York, USA
(+1) 212 438 3907
david.blitzer@spdji.com

Soogyung Jordan
Global Head of Communications
New York, USA
(+1) 212 438 2297
soogyung.jordan@spdji.com

To view the original version on PR Newswire, visit:http://www.prnewswire.com/news-releases/alliant-energy-set-to-join-the-sp-500-southwest-gas-to-join-sp-midcap-400-shutterstock-to-join-sp-smallcap-600-300292363.html

SOURCE S&P Dow Jones Indices