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Reddit Is Joining the S&P 500. Here’s What Changes on August 18
S&P Dow Jones Indices says Reddit will join the S&P 500 before U.S. markets open on August 18, turning the platform into a required holding for many index-tracking portfolios.
Topic knowledge page
RISINGInternet Platforms
Large online services built around communities, content, search, communication or user-generated information.
Why it matters
Internet platforms increasingly sit at the intersection of advertising, public markets, search discovery and AI-era data access.
Key Facts
- S&P Dow Jones Indices announced that Reddit will join the S&P 500 before U.S. markets open on August 18.
- Reuters independently reported the scheduled index change.
- Index inclusion changes benchmark membership; it does not by itself establish a company’s future operating performance.
Latest developments
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People, Companies & Places
companyReddit
S&P Dow Jones Indices says Reddit will join the S&P 500 on August 18, bringing the platform into one of the most widely tracked U.S. equity benchmarks.
View entity →organizationS&P Dow Jones Indices
Its constituent decisions determine which companies enter or leave the S&P 500 benchmark, including Reddit’s scheduled August 18 inclusion.
View entity →Primary context
Topic Sources
- S&P Dow Jones Indices — Reddit set to join S&P 500
primary organization · Aug 13, 2026
- Reuters — Reddit selected for S&P 500 inclusion
independent reporting · Aug 14, 2026