Reddit Set to Join S&P 500 and Sun Communities to Join S&P MidCap 400

NEW YORK, Aug. 13, 2026 /PRNewswire/ -- S&P Dow Jones Indices will make the following changes to the S&P 500 and S&P MidCap 400:

Following is a summary of the changes that will take place prior to the open of trading on the effective date:

Effective Date

Index Name

Action

Company Name

Ticker

GICS Sector

August 18, 2026

S&P 500

Addition

Reddit

RDDT

Communication Services

August 18, 2026

S&P 500

Deletion

AvalonBay Communities

AVB

Financials

August 20, 2026

S&P MidCap 400

Addition

Sun Communities

SUI

Real Estate

August 20, 2026

S&P MidCap 400

Deletion

Webster Financial

WBS

Financials

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