S&P Dow Jones Indices is moving CoreSite Realty Corp. to the S&P MidCap 400 index from the S&P SmallCap 600 index.

The company will be joining the S&P MidCap 400 Global Industry Classification Standard Specialized Real Estate Investment Trusts Sub-Industry index, effective before market open Aug. 10.

S&P Dow Jones Indices and S&P Global Market Intelligence are owned by S&P Global Inc.