Tractor Supply (TSCO) Set to Join the S&P 500; Align Technology (ALGN) to Join MidCap 400; Roadrunner Transportation (RRTS) and Boise Cascade (BCC) to Join S&P SmallCap 600

S&P Dow Jones Indices will make the following changes to the S&P 500, S&P MidCap 400 and S&P SmallCap 600 indices effective after the close of trading on Thursday, January 23:

S&P MidCap 400 constituent Tractor Supply Co. (NASDAQ: TSCO) will replace Life Technologies Corp. (NASDAQ: LIFE) in the S&P 500, S&P SmallCap 600 constituent Align Technology Inc. (NASDAQ: ALGN) will replace Tractor Supply in the S&P MidCap 400 and Roadrunner Transportation Systems Inc. (NYSE: RRTS) will replace Align Technology in the S&P SmallCap 600. Life Technologies is being acquired by S&P 500 constituent Thermo Fisher Scientific Inc. (NYSE: TMO) in a deal expected to be completed soon pending final approvals. Tractor Supply has a market capitalization that is more representative of the large cap market space. Align Technology is the top ranked company in the S&P SmallCap 600 as measured by market capitalization.

Boise Cascade Co. (NYSE: BCC) will replace ViroPharma Inc. (NASDAQ: VPHM) in the S&P SmallCap 600. Shire plc is acquiring ViroPharma in a deal expected to be completed soon pending final approvals.

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