Cerebras IPO raises $5.55 billion, with day-one marketcap reaching $95 billion

AI chip maker Cerebras Systems completed its Nasdaq listing on May 14, with its stock soaring 68% on the first day, raising $5.55 billion, which is the largest IPO by size in 2026 to date. The closing market cap on day one was nearly $95 billion, closing at $311.07, and rising further after hours to $329.90.

IPO Financial Data and Ownership Structure

According to the figures confirmed by CNBC:

IPO funding amount: $5.55 billion (the largest IPO by size in 2026 to date)

First-day gain: 68% (closed at $311.07, up to $329.90 after hours)

First-day market cap: about $95 billion

Latest pre-IPO private valuation (February 2026): $23.1 billion

Andrew Feldman shares: about 10.3 million shares (about 5.5% of the company), with a first-day value of about $3.2 billion

Sean Lie shares: about 3% of the company, with a first-day value of about $1.7 billion

Stock ticker: CBRS (Nasdaq)

Confirmed Share Value of Early Investors

Benchmark led the Cerebras Series A round in 2016. As of Thursday’s close, the value of its stake had reached $5.5 billion. Foundation Capital, another major investor in the same round, had a stake worth $4.8 billion.

OpenAI co-founders Sam Altman and Greg Brockman are also early investors in Cerebras. Altman’s stake had a first-day value of about $27.8 million, while Brockman’s was about $24.2 million.

Benchmark partner Eric Vishria said: “This is a major milestone. It’s very rare for any company to go public at any valuation.” Foundation Capital partner and Cerebras director Steve Vassallo said: “This is a long and very interesting road, full of technology and innovation, and also with many heart-stopping moments.”

Confirmed Business Relationship Between Cerebras and OpenAI

In early 2026, Cerebras reached a multi-year agreement worth $20 billion with OpenAI to secure computing power and related services. Cerebras provides infrastructure across multiple layers of the AI stack, including data centers, its own chips, and cloud platforms. The company’s core expertise is AI inference—i.e., the computing layer where models directly respond to user requests. Cerebras claims that the operating speed of its Wafer Scale Engine 3 (WSE-3) chip is faster than Nvidia’s GPUs.

Market Background: Venture Capital Exit Environment Still Below the 2021 Peak

According to the U.S. National Venture Capital Association yearbook, in 2025 the total exit value supported by U.S. venture capital reached $217.1 billion, more than doubling from 2024, but still less than one-third of the 2021 peak ($790.7 billion). The valuations of SpaceX, OpenAI, and Anthropic in the private market have reached or are close to the level of $1 billion.

Frequently Asked Questions

What company is Cerebras, and how does its core products differ from Nvidia?

Cerebras Systems is an AI chip maker that provides AI infrastructure such as data centers, its own chips, and cloud platforms. Its core expertise is AI inference computing. Cerebras claims that the Wafer Scale Engine 3 chips are faster than Nvidia GPUs and has also reached a $20 billion multi-year computing power agreement with OpenAI.

Why did Cerebras choose to relist after withdrawing its IPO application seven months ago?

Cerebras previously withdrew its IPO application and pivoted to private financing. After it completed a $23.1 billion private valuation in February 2026, CEO Feldman said the company has “developed to a certain level of maturity, and entering public markets is meaningful,” needing public-market capital to support future growth.

How did Benchmark and Foundation Capital benefit from this IPO?

Benchmark led the Cerebras Series A round in 2016. As of Thursday’s close, the value of its stake had reached $5.5 billion; Foundation Capital’s stake value reached $4.8 billion. Benchmark partner Eric Vishria called it a “major milestone,” noting that “it’s very rare for any company to go public at any valuation.”