- Cubist Pharma (CBST) will join the S&P MidCap 400. The drug developer will replace Smithfield Foods, which is being acquired by China's Shuanghui International.
- SAI's Science Applications spinoff is also joining the MidCap 400, and will do so at the expense of Barnes & Noble (BKS), which is getting sent down to the S&P SmallCap 600. B&N will displace RadiSys (RSYS) in the index.
- SAI is being renamed Leidos Holdings, and will trade in the MidCap 400 under the symbol LDOS. Science Applications will trade under the symbol SAIC.
- Organic macaroni maker Annie's (BNNY) is taking Cubist's spot in the SmallCap 600.
- All changes take place after Thursday's close.