S&P Dow Jones Indices is adding Macerich Co. to the S&P MidCap 400, effective prior to the open of trading on Dec. 23.

The regional mall real estate investment trust will join the S&P MidCap 400 Global Industry Classification Standard Retail REITs Sub-Industry index and will be deleted from the S&P 500.

Affiliated Managers Group Inc. and TripAdvisor Inc. will also be deleted from the S&P 500 GICS Asset Management and Custody Banks Sub-Industry index and S&P 500 GICS Interactive Media and Services Sub-Industry index, respectively.

Live Nation Entertainment Inc. will join the S&P 500 GICS Movies & Entertainment Sub-Industry index, while Zebra Technologies Corp. will be added to the S&P 500 GICS Electronic Equipment & Instruments Sub-Industry index. STERIS PLC will join the S&P 500 GICS Health Care Equipment Sub-Industry index.

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