S&P Dow Jones Indices will add Sun Communities Inc. to the S&P MidCap 400 index.
The addition takes effect before the opening of trading on Thursday, August 20, 2026.
Sun Communities replaces Webster Financial Corp. in the mid-cap benchmark.
The move increases the real estate investment trust's exposure to institutional investors and index funds.
Fund rebalancing to reflect the benchmark change typically drives higher trading volume and share demand.