Reddit will be added to the S&P 500, ending months of speculation over the social-media company’s index status and sending its shares up roughly 11% in after-hours trading on Thursday.
The inclusion marks a milestone for the platform, which went public in 2024 and has since seen its stock rally on the back of surging advertising revenue and licensing deals tied to artificial-intelligence data. Entry into the benchmark index typically triggers buying from passive funds that track it, providing an immediate lift to demand for a company’s shares.
Reddit’s addition follows a familiar pattern for recent tech and consumer-internet listings that have graduated into the benchmark after building consistent profitability. The company had been passed over in earlier reshuffles, and its selection this time reflects the improving strength of its financial results.
The move places Reddit among the most closely watched additions to the index this cycle, echoing earlier entries such as when AppLovin and Robinhood secured their own spots on the benchmark and saw their shares climb on the news.
Despite the market enthusiasm, some analysts have flagged concerns about the durability of Reddit’s growth. Questions center on the company’s reliance on search-referral traffic, the sustainability of its AI data-licensing income, and the broader volatility that has characterized its share price since the initial public offering.
Reddit has built a substantial revenue stream by licensing its trove of user-generated content to companies training large language models, a business line that has helped underpin its recent gains but that analysts note is still relatively new and difficult to forecast.
Inclusion in the S&P 500 is widely regarded as a stamp of institutional legitimacy, often broadening a company’s investor base and improving liquidity. It also subjects the firm to closer scrutiny from index-tracking funds and a wider pool of shareholders.
The reshuffle comes as the benchmark trades near record territory, with the index having pushed toward the 7,000 mark in recent months amid sustained optimism around technology and AI-linked earnings.
Reddit’s shares are expected to draw heightened attention when the change takes effect, as fund managers adjust their holdings to reflect the new composition of the index. Investors will be watching whether the company can convert index membership into lasting stability after a period of sharp swings.