GoKawiilCerebras shares fall 20% this week amid lockup expiry and OpenAI GPU report
Cerebras Systems' stock closed Friday at $166.43, down nearly 20% for the week and its lowest price since its May IPO. The decline followed a SemiAnalysis report that OpenAI will use Nvidia GPUs, not Cerebras chips, to power the 'Ultrafast' mode of GPT-6.1 Sol, and coincided with the expiration of lockup restrictions freeing up to 19.4 million insider shares, about 8% of shares outstanding.
GoKawiil's interpretation of the reporting above, not reported fact.
The drop shows how quickly investor enthusiasm for an Nvidia alternative can fade when a marquee customer relationship appears to shift toward Nvidia hardware instead. With Cerebras' market cap falling from a $95 billion IPO-day peak to about $39 billion, the newly unlocked shares could add further selling pressure, and the episode may test confidence in Cerebras' $10 billion OpenAI computing deal announced earlier this year.
- Cerebras stock fell nearly 20% this week to a post-IPO low of $166.43.
- A SemiAnalysis report says OpenAI will use Nvidia GPUs rather than Cerebras chips for GPT-6.1 Sol's 'Ultrafast' mode.
- Lockup expiration freed up to 19.4 million insider shares (8% of total) as Cerebras' market cap fell to about $39 billion from a $95 billion IPO peak.
Source: cnbc.com — Isabel O'Brien, 2026-10-02
Published there as: “Cerebras stock hits post-IPO low, tumbling 20% for the week on Nvidia pressure and lockup expiration”
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