NEW YORK, May 16, 2013 /PRNewswire/ -- S&P MidCap 400 constituent Kansas City Southern (NYSE: KSU) will replace Dean Foods Co. (NYSE: DF) in the S&P 500, the Dean Foods Co. stub (NYSE: DFwi) will replace Kansas City Southern in the S&P MidCap 400, and The WhiteWave Foods Co. (NYSE: WWAVwi) will replace Quicksilver Resources Inc. (NYSE: KWK) in the S&P MidCap 400 after the close of trading on Thursday, May 23. Dean Foods is spinning off a portion of its remaining equity interest in WhiteWave in a transaction expected to be completed on or around that date, pending final approvals. The reduced market capitalization of Dean Foods after the spin-off will make it more representative of the midcap market space. Quicksilver Resources is ranked 400^th in the S&P MidCap 400 and is no longer representative of the midcap market space.

Kansas City Southern engages in the freight rail transportation business. Headquartered in Kansas City, MO, the company will be added to the S&P 500 GICS (Global Industry Classification Standard) Railroads Sub-Industry index.

Dean Foods is a food and beverage company. Headquartered in Dallas, TX, the company will be added to the S&P MidCap 400 GICS Packaged Foods & Meats Sub-Industry index.

WhiteWave Foods is a consumer packaged food and beverage company. Headquartered in Dallas, TX, the company will be added to the S&P MidCap 400 GICS Packaged Foods & Meats Sub-Industry index.

Following is a summary of the changes:

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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