Reddit joins S&P 500 – stock surges 15 percent

From garage project to index giant

When Steve Huffman and Alexei Ohanian founded Reddit in 2005, Huffman later admitted that part of his motivation was simply not wanting to look foolish in front of his parents. Just over two decades later, the platform is valued at more than $30 billion and is taking its place in the world's most closely watched stock index.

S&P Dow Jones Indices announced on Thursday, August 13, that Reddit will replace real estate company AvalonBay Communities (AVB) in the S&P 500 effective Monday, August 18, according to Yahoo Finance. AvalonBay is leaving the index as a result of an acquisition by Equity Residential.

The market reaction was immediate

The news sent Reddit's share price sharply higher. According to source material from Yahoo Finance, the stock climbed 11% in extended trading on Thursday evening, and by midday Friday the gain had reached nearly 14% — before settling at a daily increase of 15% to $182.

The picture is nonetheless mixed: the stock was down roughly 30% year-to-date before the announcement and still trades well below its peak of over $270 from last year.

Structural buying pressure from index funds

The reason for the strong price reaction is mechanical: when a company is added to the S&P 500, funds that track the index — including the Vanguard S&P 500 ETF and BlackRock's iShares Core S&P 500 ETF — are obligated to purchase the stock. Trillions of dollars are benchmarked against the index, creating automatic demand regardless of fundamental analysis.

Historically, the inclusion effect has been significant. Charles Schwab has noted that Tesla's stock rose 60% between the announcement and its actual inclusion in December 2020. At the same time, not all such jumps are lasting: Workday surged nearly 10% on its inclusion news, but subsequently fell 19% from its peak.

The company is delivering on the numbers

Reddit, which went public in March 2024, has built an impressive financial track record. In 2025, total revenue surpassed $2 billion — growth of 69% year-over-year — and the company posted net income of $530 million, according to the source material. That represents an improvement of more than $1 billion compared to 2024.

In Q2 2026, revenue came in at around $805 million (61% growth), with a gross margin of 91.2%. Reddit's CFO Drew Vollero said in connection with the announcement that the company is proud to be included in the index, adding that "Reddit's raw material is special, and there is enormous potential to continue building great products and scaling profitably."

The platform is ranked as the third most visited website in the US as of May 2026 (Semrush) and has more than 130 million daily active unique users.

Analysts are not in agreement

Despite the solid numbers, the analyst community is not unanimously optimistic. According to the source material, several analysts have downgraded the stock to "neutral" or "sell," citing a "steep valuation premium" relative to Meta and expectations of slower growth going forward.

Reddit faces concrete structural challenges: user growth in the US is slowing, and search engine traffic has become more volatile as AI-powered search solutions change how people find content. The company has sought to diversify its revenue streams, including by licensing its content to AI companies — a partnership with Google is reportedly valued at around $60 million annually for training large language models, according to the source material.

Analysts estimate earnings per share (EPS) of $8.04 for fiscal year 2026, compared to $2.62 in 2025 — but these estimates assume continued high growth rates in a market where competition has intensified.

What happens next?

As of Monday morning, August 18, Reddit is formally part of the S&P 500. The question investors are asking is whether the stock can hold its new level — or whether we will see a repeat of the Workday scenario, with a subsequent pullback once the structural wave of buying from index funds subsides.