Cerebras Stock Since the IPO: CBRS Fell From $386 to Under $170, Then Crashed on Earnings

Cerebras stock (CBRS) closed its May 14, 2026 IPO day up 68% at a $67 billion market cap, then lost more than half its peak value, bottoming at $160.81 on June 26 before crashing another 15% after its first earnings report. That's the short answer. The longer answer is that the crash happened despite 92% revenue growth — this is a story about customer concentration, not a demand problem.

Cerebras was the biggest tech IPO of 2026, raising $5.55 billion and giving retail investors their first direct shot at an Nvidia challenger in wafer-scale AI chips. Two months later, the stock tells a much messier story than the opening-day headlines suggested — and it's a useful case study in how a hot AI IPO can still get punished hard the moment Wall Street starts asking where the next dollar of revenue is coming from.

Cerebras stock since the IPO: the full price timeline

Cerebras stock since the IPO has moved through three distinct phases: a euphoric debut, a two-month slide, and an earnings-driven crash. CBRS priced at $185 per share on May 14, 2026, opened at $350, and closed its first trading day up 68% near $311 — a $67 billion market cap for a company that had been valued at $23 billion just three months earlier in its Series H round.

The stock touched its all-time high of $386.34 that same opening day before gravity took over. By June 26, 2026, CBRS had fallen to a 52-week low of $160.81 — a roughly 58% drop from the intraday peak — before its first quarterly earnings report as a public company triggered a further 15% single-day decline. As of mid-July 2026, the stock's market cap sits near $50.7 billion, down about 15.5% over the prior week alone, according to stockanalysis.com pricing data.

Why did Cerebras stock crash after its first earnings report?

Cerebras shares fell more than 15% in a single session after its late-June 2026 earnings report — not because the numbers were bad, but because of what they revealed about revenue concentration. Q1 2026 GAAP revenue came in at $193.4 million, with core revenue of $191.3 million up 92% year over year, and cloud/services revenue up 167% to $79.8 million. On paper, that's a strong quarter for a newly public company.

The problem investors flagged was the $24.6 billion in remaining performance obligations (RPO) Cerebras disclosed — the vast majority of which comes from a single customer: its multi-year deal with OpenAI for 750 megawatts of compute capacity, valued at more than $10 billion and set to be delivered by 2028. That's the same customer-concentration risk we've flagged across the broader AI valuations landscape — a backlog that looks enormous on a slide but leaves the stock exposed to a single counterparty's spending decisions.

Wall Street's read: 92% growth is easy to produce when nearly all of it traces back to one buyer who is itself burning cash at scale. Zacks' consensus estimate puts full-year 2026 revenue at $861.3 million, which would still leave Cerebras trading at a revenue multiple far above hardware peers even after the pullback.

Cerebras valuation history: from $8.1B to a $50.7B public market cap

Cerebras's valuation trajectory in the run-up to its IPO was one of the steepest of any 2026 tech listing. The company raised an $1.1 billion Series G in September 2025 at an $8.1 billion valuation, then closed a $1 billion Series H just five months later, in February 2026, at roughly $23 billion — a nearly threefold jump, led by Tiger Global with participation from Benchmark, Fidelity, AMD, and Coatue. The IPO itself, two months after that, priced the company at over $50 billion before day-one trading pushed the market cap to $67 billion.

Figures blended from Cerebras press releases, Bloomberg, DataCenterDynamics, and stockanalysis.com. Valuation figures are post-money at each round; IPO and public figures reflect market capitalization at the stated date.

Cerebras vs its AI chip peers: Groq, SambaNova, and Nvidia

Cerebras's post-IPO wobble looks different depending on which peer you compare it to. Groq, once seen as Cerebras's closest inference-speed rival, was acquired by Nvidia on June 24, 2026 via a non-exclusive licensing deal structured to pay out $17 billion in cash across three installments — effectively taking Groq off the board as an independent competitor. SambaNova, the other major wafer-scale challenger, raised $1 billion in July 2026 at an $11 billion valuation led by General Atlantic, roughly a fifth of Cerebras's current public market cap for comparable technology.

That gap is the clearest evidence that public markets are still pricing Cerebras as the legitimate #2 to Nvidia in AI inference hardware, even after the post-earnings selloff — the stock's ~$50.7 billion market cap is more than four times SambaNova's private valuation. Whether that premium holds depends almost entirely on whether Cerebras can add customers beyond OpenAI before its next earnings report, the same concentration question that triggered the June selloff in the first place.

What Cerebras stock's post-IPO swings mean for AI chip investors

Cerebras remains a Wall Street favorite on paper — 11 analysts rate the stock a "Strong Buy," with a 12-month price target around $291, roughly 47% above mid-July 2026 levels. But the gap between that bullish coverage and a stock down more than 40% from its opening-day peak tells you analysts are betting on customer diversification that hasn't happened yet, not validating the current backlog concentration.

For investors tracking the broader AI infrastructure trade alongside our Big Tech earnings dashboard, Cerebras is a useful reminder that a hot IPO and strong revenue growth don't insulate a stock from concentration risk once quarterly disclosures force the market to actually price it. The $24.6 billion OpenAI-driven backlog is real, but a single-customer dependency at that scale is exactly the kind of risk that got repriced hard in June — and will keep getting repriced every quarter until Cerebras shows a second or third material customer on its books.

The next catalyst: Cerebras's insider lock-up expires November 9, 2026

The next scheduled catalyst for CBRS isn't another earnings report — it's the insider lock-up expiration. Cerebras's 180-day IPO lock-up releases at 6:00 a.m. Eastern on the second trading day after its Q3 2026 earnings release, or on November 9, 2026, whichever comes first. That's the date the roughly $1.9 billion in stock held by CEO Andrew Feldman and the $1 billion held by co-founder and CTO Sean Lie technically become freely tradable, alongside every other pre-IPO employee and investor stake.

So far, insider activity has been limited to routine "sell to cover" transactions used to pay tax withholding on vesting RSUs — CTO Sean Lie sold 10,033 shares on June 25, 2026 at prices between $165.11 and $185.24, and Chief Accounting Officer Yagnesh Patel sold 6,079 Class A shares for the same reason. Neither is a discretionary bet against the stock; both are pre-arranged, tax-driven sales explicitly carved out of the lock-up agreement. The real test comes in November, when insiders who've watched the stock swing from $386 to $161 and back get their first chance to sell at will — a standard overhang risk for any newly public company, but one that matters more here given how much of Cerebras's float is still locked up relative to its trading volume.