S&P 500 bids farewell to Avon Products and Denbury Resources. However, both companies will be replaced with Hanesbrands and Equinox respectively by March 20.

Also after the close on March 20, SL Green Realty Corp (SLG.N) will replace Nabors Industries Ltd (NBR.N) in the S&P 500, it said.

In addition, Celgene Corp (CELG.O), Kinder Morgan (KMI.N) and Actavis Plc (ACT.N) will replace Freeport-McMoRan (FCX.N), National Oilwell Varco (NOV.N) and Apache (APA.N) in the S&P 100 after the close on March 20, it said.

Shares of Henry Schein were up 2.7 percent after the bell, while Hanesbrands shares rose 3.7 percent, Equinix shares were up 1.9 percent and SL Green Realty shares were up 2 percent.