Cerebras Systems Inc. (CBRS) continued its post-IPO momentum on Friday, with shares rising 5.7% to $328.80 in premarket trading as of 4:04 a.m. EDT. The move follows a blistering first-day performance on Thursday, when the AI chipmaker closed at $311.07, a 68% premium above its initial public offering price. The stock opened at $350 and touched a high of $386.34 during its Nasdaq debut.
IPO Details and Valuation
Cerebras priced its IPO at $185 per share, selling 30 million Class A shares. Underwriters have a 30-day option to purchase an additional 4.5 million shares. The offering raised $5.55 billion, giving the company a fully diluted valuation of $56.43 billion, according to Reuters. That figure accounts for all potential shares, including options and restricted stock. This marks the largest U.S. IPO of 2026 to date.
Market Context and Competitive Landscape
The debut provides investors with a rare direct bet on an AI hardware company outside of Nvidia (NVDA), which dominates the GPU market. Cerebras markets AI systems built around its wafer-scale engine, a processor made from an entire silicon wafer designed to accelerate AI inference — the process of running trained models. As organizations shift focus from model development to widespread deployment, Cerebras aims to capitalize on growing demand.
According to Reuters, Cerebras has secured Amazon (AMZN) and OpenAI as clients, offering public investors direct exposure to AI infrastructure demand. “In Silicon Valley, we understand just how big AI will be,” Cerebras CEO Andrew Feldman told Reuters. As AI models become more advanced, “the amount we use them will explode,” he added.
Valuation Debate and Analyst Views
The sharp rally has sparked debate over valuation. Nicholas Smith, senior research analyst at Renaissance Capital, told Reuters that while the $185 IPO price looked “reasonable” based on projected 2028 sales and EBITDA, “at the current price, it is quite high even out to 2028.” The stock’s rapid ascent has left some questioning whether the market is pricing in years of future growth within days.
Supply Risk and Insider Selling
Potential supply overhang looms. According to a May 14 SEC reoffer prospectus, up to 6,808,018 Class A shares could hit the market as Class B holders convert their shares and seek to cash out. Those shares may be offered at market value or through negotiated transactions. The filing also flagged significant risk for buyers.
Prediction Market Sentiment
On Polymarket, the Cerebras IPO closing market cap contract settled in the $60 billion to $70 billion range at 100% after Thursday’s close, with $370,708 traded. However, traders still favor SpaceX (87%) to claim the top IPO market cap by end of 2026, with Anthropic trailing at 8%, suggesting limited conviction that Cerebras will maintain its early lead.
Outlook
CBRS offers investors a fresh, pure-play vehicle for AI chip exposure. The real question is whether the company can justify the price that public buyers have stamped on it. With strong demand at the IPO and a high-profile client roster, Cerebras has momentum — but the road ahead remains fraught with valuation risk and potential share overhang.
