Observed Signal · Oct 2, 2026 · Earnings Report · Source: CNBC Technology · Impact: 2/5 · Sentiment: Negative
Cerebras stock hits post-IPO low amid Nvidia pressure
Cerebras Systems' stock dropped nearly 20% this week to $166.43, its lowest since the May IPO, after a report that Nvidia would power OpenAI's "Ultrafast" mode for GPT-6.1 Sol, taking a key inference workload away from Cerebras. The stock is down more than 50% from its opening price. Insider selling, including CEO Andrew Feldman and CTO Sean Lie selling over $240 million in shares, exacerbated the decline as lockup restrictions expired. OpenAI CEO Sam Altman responded to speculation, calling Cerebras a "close partner," which helped stock recover almost 3% in after-hours trading. Cerebras' market cap has fallen from $95 billion at IPO to about $39 billion.
Cerebras' stock decline and loss of OpenAI inference to Nvidia highlight competitive dynamics in AI hardware, but the direct impact on AdTech is limited. The news is relevant for tech infrastructure but not core advertising technology.
Track NVIDIA Signals & Market Shifts in Real-Time
Polaris7 autonomous intelligence agents track regulatory filings, primary sources, executive changes, and deal flow 24/7. Create your free Explorer workspace to monitor these entities.
Key Takeaways & Evidence Grounding
- Cerebras stock fell nearly 20% this week to $166.43, its lowest since its May IPO.
- Cerebras lost a key inference workload for OpenAI's 'Ultrafast' mode to Nvidia.
- Insider selling: CEO Andrew Feldman and CTO Sean Lie sold over $240 million in shares since Aug. 20.
- Lockup expiration unlocked 19.4 million shares (8% of total outstanding shares) on Wednesday.
- Cerebras market cap dropped from $95 billion at IPO to about $39 billion.
Connected Companies & Entities
7 Entities mapped“Research firm SemiAnalysis posted on X on Wednesday that OpenAI will power its 'Ultrafast' mode for GPT-6.1 Sol with Nvidia graphics process...”
“Cerebras stock plummeted nearly 20% this week to its lowest price since the company’s monster IPO in May....”
“OpenAI will power its 'Ultrafast' mode for GPT-6.1 Sol with Nvidia GPUs instead of Cerebras hardware....”
“Research firm SemiAnalysis posted on X on Wednesday that OpenAI will power its 'Ultrafast' mode for GPT-6.1 Sol with Nvidia graphics process...”
“Cerebras closed at a $95 billion market cap on the first day of trading, just shy of joining the ranks of Meta, Alibaba and now SpaceX....”
“Cerebras closed at a $95 billion market cap on the first day of trading, just shy of joining the ranks of Meta, Alibaba and now SpaceX....”
“Cerebras closed at a $95 billion market cap on the first day of trading, just shy of joining the ranks of Meta, Alibaba and now SpaceX....”
Ontology Mapping & Concepts
Related Market Signals & Shifts
Recent verified developments and strategic activity across this market segment.
Cerebras shares fall 14% after Q2 earnings
Cerebras Systems shares dropped about 14% in after-hours trading after the company reported second-quarter results following its May IPO. The chipmaker reported core revenue of $180 million (below LSEG consensus of $194 million) and an adjusted loss per share of $0.05 versus $0.17 expected, while total revenue was $210 million including pass-through items. Cerebras raised full-year core revenue guidance to $880–$890 million and said it expects core revenue of $214–$216 million this quarter. The company recorded a net loss of $450.5 million, driven largely by $386.6 million of stock-compensation costs. CEO Andrew Feldman said AI demand is "through the roof," and the company cited partnerships with AMD and usage of its chips by OpenAI for GPT 5.6 Sol.
Cerebras Files for IPO Again; OpenAI Is Major Customer
Cerebras, a maker of high-performance AI processors, filed an updated prospectus aiming to sell 28 million shares at $115–$125 each in a Nasdaq initial public offering, raising up to $3.5 billion and implying a market value as high as $26.6 billion. The filing follows a February valuation of about $23 billion and a previously withdrawn 2024 IPO attempt. Cerebras has shifted toward operating cloud services using its chips and counts OpenAI as a major customer (including a deal to provide up to 750 MW of AI computing power through 2028 worth over $20 billion). The company reported roughly $510 million in revenue (about 76% year-over-year growth) and showed $87.9 million in net income for the fourth quarter. CEO and co-founder Andrew Feldman is not selling shares in the offering; underwriters may exercise an option to buy an additional 4.2 million shares.
Cerebras Falls After Earnings, Forecasts Shrinking Margin
Cerebras reported its first quarterly results since its May 2026 IPO, posting $193.4 million in revenue (up 92% year‑over‑year) and a loss per share of $0.22. The company narrowed its net loss to $14 million from $23.9 million a year earlier, but shares fell about 10% in after‑hours trading and are down roughly 28% since the IPO. Management forecast a contraction in core gross margin to 36–38% in Q2 (from 46.5% in Q1) and provided forward revenue guidance — core revenue of $914 million (88% growth) and full‑year core revenue of $855.5–$865 million (≈69% growth at the midpoint). Cerebras also noted expansion of customer deployments (chips in Amazon Web Services data centers) and a previously announced multi‑billion dollar supply relationship with OpenAI.
Track Real-Time Market Signals & Shifts
Set up custom watchlists to receive automated, evidence-grounded executive digests whenever material signals or shifts occur across your tracked landscape.