Cerebras Systems filed the amended S-1 on Monday and was on Day 3 of the roadshow Wednesday. The numbers in the document are the cleanest version of the company's deal anyone has yet seen: 28 million shares of Class A common stock at $115 to $125, with a 30-day option for the underwriters on another 4.2 million shares; net proceeds of approximately $3.24 billion at the midpoint, $3.73 billion if the greenshoe clears in full; pricing targeted for May 13, listing on the Nasdaq under "CBRS" the following day. [1] [2] At the top of the band, the implied fully diluted valuation is $26.62 billion. [2] CEO Andrew Feldman is not selling shares, retaining 10.3 million — worth up to $1.28 billion at the high end. [3] Morgan Stanley, Citigroup, Barclays, and UBS lead the book; Mizuho and TD Cowen are bookrunners. [1]

The headline number cut from the $40 billion target the paper described Monday to the $26.6 billion midpoint is what the trade press has been writing about for forty-eight hours. [4] Tuesday's edition read the cut as the book carrying itself, the underwriters letting the $10-billion-plus IOI book absorb the headline reduction. The Day 3 question — whether the IOI compresses against the lower band or holds — is the part bookbuild rooms are watching.

The part that sits inside the prospectus body, and that MSM coverage treats as background, is the OpenAI counterparty triangle. OpenAI is, simultaneously, the company's largest customer, a creditor, and a warrant-holding equity participant. The customer leg: a multi-year compute agreement disclosed in January worth more than $20 billion in commitments to date, covering up to 750 megawatts of inference capacity through 2028. [5] The lender leg: roughly $1 billion advanced to Cerebras in exchange for a warrant. The shareholder leg: the warrant is structured so that approximately 17 percent of it vests only if Cerebras maintains an average post-IPO valuation of $40 billion for one month. [6]

That is the clause worth reading aloud. Cerebras has just cut its IPO headline from $40 billion to $26.6 billion. The same prospectus contains a vesting trigger pegged to $40 billion. The pricing band itself is, in a literal sense, below the threshold at which the company's largest customer becomes a larger shareholder. A trader scanning the document Wednesday morning is being asked to size two questions at once: whether the chip thesis clears the band, and whether the secondary market then walks the print up roughly fifty percent in thirty days to vest the warrant tranche. The two questions are correlated but not identical.

This is what April 30's Cerebras coverage in the paper called the customer-lender-shareholder circular dependency. [7] Sam Altman's company is the largest disclosed revenue source, the holder of paper that converts into equity on a price condition Cerebras must hit, and an early investor in the chipmaker through Altman personally. The SEC has historically treated such arrangements with care; the underwriters have written the risk factors carefully. The risk factors do their job — they disclose. They do not resolve.

The chip-vendor cohort context matters here. AMD on Tuesday printed Q1 revenue of $10.25 billion and guided Q2 to $11.20 billion, with the Meta MI450 six-gigawatt deal as the demand anchor. [8] That print sets a comparable: a publicly traded AI-chip incumbent with diversified hyperscaler demand growing into double-digit billions per quarter, valued at the multiple the public market is currently willing to assign. Cerebras at $26.6 billion against 2025 revenue of $510 million prints at roughly 52 times trailing sales — a multiple that requires the OpenAI contract to lift forward revenue toward a $4-$5 billion run-rate by 2028. The math closes only if the contract closes. The contract closes only if OpenAI's compute strategy holds. OpenAI's compute strategy now has its own outside number: $50 billion projected for 2026, disclosed Tuesday in court testimony by Greg Brockman during the Musk trial. [9]

Day 3 of a roadshow is when bookrunners know whether the demand at the lower band is real money or anchor commitments waiting to flex. An IOI book reported above $10 billion against a $3.5 billion raise is a 2.85-times oversubscription — strong, but compressed from the Friday-published $40 billion headline implied 11x cover. The cut from $40 billion to $26.6 billion lets the underwriters print at a cleaner relative multiple and lets the secondary market take the valuation walk if the chip story holds. That is the deliberate design. The warrant clause is what happens if the design works.

Cerebras's S-1/A is Document 1 in the SEC accession file dated May 4. [2] Pricing is targeted May 13. The CBRS ticker opens May 14. The two pages an institutional buyer reads in earnest before the call goes in are the band ($115-$125, 28 million shares) and the OpenAI section. The first is the offer. The second is the question.

-- THEO KAPLAN, San Francisco