Cerebras Systems Inc. (CBRS) jumped more than 5% in after-hours trading after S&P Dow Jones Indices announced the recently-listed AI chipmaker is eligible for inclusion in its indices, effective Monday, May 20. The move provides a fresh tailwind for the stock following one of the most successful initial public offerings in the tech sector in years.
"Index inclusion is a major validation and a significant near-term catalyst for any newly public company," said David Yakobovitch, general partner at DataPower Capital, a Cerebras investor. "It forces passive capital to own the stock and increases visibility across the board."
The announcement did not specify which S&P index Cerebras would join, but its valuation north of $50 billion makes it a candidate for several broad market benchmarks. The inclusion means that dozens of passive exchange-traded funds (ETFs) and index funds will be required to buy Cerebras shares to match their holdings. This non-discretionary buying can create significant short-term demand, independent of company fundamentals. The stock's rally came during a session where the broader Nasdaq 100 was little changed and the 10-year Treasury yield held steady near 4.45%.
The S&P news solidifies a whirlwind debut for the Nvidia competitor. Cerebras priced its upsized IPO at $185 a share before opening for trading at $350 and closing its first day at $311.07, a 68% gain. The deal raised $5.5 billion for the company, making it the largest U.S. tech IPO since Snowflake's debut in 2020. The company designs wafer-scale processors, massive chips the size of a dinner plate, which it pitches as a more efficient way to run AI inference workloads compared to clusters of traditional GPUs from rivals like Nvidia.
Cerebras has secured major contracts that underpin its growth story, including a multi-year deal with OpenAI potentially worth over $20 billion and an agreement with Amazon's AWS. However, its valuation remains a key focus for investors. At its current price, the stock trades at more than 130 times its 2025 sales of $510 million. The company also remains heavily reliant on a small number of customers, with two UAE-linked entities accounting for 86% of its revenue last year.
This article is for informational purposes only and does not constitute investment advice.