NEW YORK, May 10, 2016 /PRNewswire/ -- S&P MidCap 400 constituent Alaska Air Group Inc. (NYSE:ALK) will replace SanDisk Corp. (NASD:SNDK) in the S&P 500, S&P SmallCap 600 constituent Texas Roadhouse Inc. (NASD:TXRH) will replace Alaska Air Group in the S&P MidCap 400, and Cavco Industries Inc. (NASD:CVCO) will replace Texas Roadhouse in the S&P SmallCap 600 after the close of trading on Thursday, May 12. S&P 500 constituent Western Digital Corp. (NASD:WDC) is acquiring SanDisk Corp. in a deal expected to be completed on or about that date pending final conditions. 

Alaska Air provides passengers and cargo air transportation services. Headquartered in Seattle, WA, the company will be added to the S&P 500 GICS (Global Industry Classification Standard) Airlines Sub-Industry index.

Texas Roadhouse operates full-service casual dining restaurants. Headquartered in Louisville, KY, the company will be added to the S&P MidCap 400 GICS Restaurants Sub-Industry index.

Cavco Industries engages in the design, production, wholesale, and retail sale of manufactured homes. Headquartered in Phoenix, AZ, the Company will be added to the S&P SmallCap 600 GICS Homebuilding Sub-Industry index.

Following is a summary of the changes:

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