Standard & Poor's on Wednesday said it will add Philadelphia Consolidated Holding Corp. to its MidCap 400 index on Monday.
The insurer is replacing Aquila Inc., which sells electric and natural gas services, on the index. Aquila is being acquired by electric company Great Plains Energy Inc.
Investment banking firm Greenhill & Co. Inc. will replace Philadelphia Consolidated on the S&P SmallCap 600.
Additionally, real estate investment trust LaSalle Hotel Properties will replace nutritional supplement and skin care products company USANA Health Sciences Inc. in the S&P SmallCap 600. USANA is being taken private by an investor group led by the company's senior management.