S&P Dow Jones Indices announces Reddit’s inclusion in the S&P 500, effective August 18, 2026, replacing AvalonBay Communities.
Reddit will join the S&P 500 index before markets open on August 18, 2026, S&P Dow Jones Indices announced. The move replaces AvalonBay Communities, which is being acquired by Equity Residential.
Shares of Reddit jumped over 8.5% in after-hours trading following the announcement. The inclusion reflects the company’s growing market capitalization and liquidity, meeting the index’s eligibility criteria.
The S&P 500’s rebalancing often triggers passive fund inflows, as index-tracking funds adjust holdings to mirror the updated composition.