Reddit is being added to the S&P 500, a move that hands the sprawling online forum both greater standing and a wave of new investment. Membership in the index is widely treated as a mark of arrival for a company, because a stock qualifies only after meeting criteria that point to stability, including sufficient market size and a record of consistent profitability. Reddit’s shares jumped 12.6 percent on the news.
The practical effect goes well beyond prestige. The S&P 500 tracks 500 of the largest companies on the US market, and trillions of dollars in investments measure themselves against it. Mutual funds and exchange-traded funds that mirror the index have to buy a stock once it is included, which means steady demand for Reddit shares from funds that follow the benchmark.
That matters more than ever, because investors are leaning heavily on funds that simply track indexes rather than trying to pick winners. Index funds keep costs low, letting savers hold on to more of their returns, and over time they have tended to outperform funds that bet on individual stocks. Reddit’s addition channels some of that money automatically toward the company.
The timing follows a strong stretch of results. Reddit joins the index having posted its highest ever quarterly revenue in the second quarter, and it has turned a profit in almost every quarter since going public in 2024. Wall Street expects the company’s profits to more than double across 2026 on the back of rising revenue.
Inclusion also came with a reminder of the index’s rules. A company must trade publicly for at least 12 months to qualify, a guideline the index operator recently stuck to when it declined to fast-track SpaceX into the S&P 500 after the rocket company’s large public offering earlier in the year. Reddit cleared that bar comfortably, and its promotion marks a notable step for a platform that began as a message board and has grown into a business large enough to sit among the most closely watched names on the market.
