Cerebras Surges Up to 89% in Debut After $5.55 Billion IPO, Valuing Chipmaker at $40 Billion

Cerebras Systems Inc. closed its initial public offering at $185 per share, raising $5.55 billion and securing a market value of about $40 billion, according to Bloomberg AI. The pricing blew past the company's earlier target range of $150-$160 per share and its previous $4.8 billion valuation goal, confirming intense investor appetite for alternatives to Nvidia's AI hardware dominance.

The AI chipmaker and data center operator had lifted its price range just days before pricing, after seeing continued build-up in demand for its shares, according to earlier reports. But that demand wasn't just from public market investors: Arm Holdings and SoftBank Group made a last-ditch effort to acquire Cerebras weeks before its expected IPO, an approach that was rebuffed, according to multiple reports.

Shares jumped 81% to 89% in their first day of trading on the Nasdaq, depending on intraday peaks, after pricing at $185. The surge turned what was already a massive fundraising event into a genuine market spectacle, with the stock indicated to open as high as 89% above its listing price before settling into an 81% gain by session's end.

The offering ranks as one of the largest U.S. tech IPOs in years and is being watched as a stress test for a wave of AI listings Wall Street is bracing for later in the year, according to Fortune AI. That framing matters: Cerebras isn't just raising money, it's opening the floodgates.

Serial Silicon Valley entrepreneur Andrew Feldman, who literally grew up on the campus of Stanford University, saw his stake convert into a $3.2 billion fortune on debut day. He had already sold three companies and taken another public before this. The personal haul underscores how concentrated the value creation remains in chip startups that actually make it to public markets.

Cerebras builds wafer-scale chips designed specifically for AI training and inference workloads, packing enormous compute onto single massive chips. The company also operates data centers, giving it both chip sales and recurring revenue streams that appeal to investors wary of pure hardware plays.

The attempted acquisition adds another layer to Cerebras' market positioning. Arm and SoftBank's interest suggests strategic buyers see value in Cerebras' specialized approach to AI compute, even as the company opted to go public rather than sell. Cerebras positions itself as a more efficient alternative for certain training workloads, particularly for large language models.

Investor interest reflects broader hunger for AI infrastructure plays that aren't Nvidia, with hyperscalers committing hundreds of billions to data center expansion. The $5.55 billion offering marks the biggest IPO of 2026 so far, and its reception will likely influence how aggressively other AI infrastructure companies pursue public listings this year.