The insider selling is too small relative to market cap to drive a bearish signal, but the CTO's $3.42M sale and the company's poor historical calibration (20% T+20 win rate) suggest monitoring for any upcoming negative news. No immediate trade action warranted; watch for a Form 4 filing from Lie or Vishria to see if selling continues.
Price Chart
Executive Summary
A cluster of insider selling at Cerebras Systems, totaling $5.76M over a week, is dominated by a $3.42M sale from CTO Sean Lie and a $2.24M sale from Director Eric Vishria. While the total value is only ~0.013% of the $43.7B market cap—well below the 0.1% materiality threshold—the involvement of the CTO and a director, combined with the company's poor historical calibration for bullish/long calls (20% win rate at T+20), suggests caution. The selling is not quantitatively material by market cap, but the insider composition and negative track record on this ticker warrant a neutral-to-cautious stance.
Key Financial Metrics
Key Facts
- Total insider sales of $5.76M over 7 days, representing ~0.013% of $43.7B market cap.
- Largest sale: CTO Sean Lie sold 16.3K shares for $3.42M on 2026-08-21.
- Director Eric Vishria sold 10K shares for $2.24M on 2026-08-17.
- CEO Andrew Feldman sold only 6 shares for $1K, a trivial amount.
- All other trades in the cluster were non-cash (conversions/other) with $0 economic value.
- Historical reports on CBRS show a 20% win rate at T+20, with average alpha of -18.43%.
Financial Impact
Total insider sales of $5.76M, or 0.013% of market cap—immaterial by proportionality standards.
Risk Factors
- Insider selling, while small, could precede negative news or a guidance miss.
- Historical model performance on CBRS is poor, with large negative average alpha at T+20.
- Non-cash conversions by major holders (Benchmark, Foundation Capital) may signal upcoming secondary offerings.
Market Snapshot
Documents Analyzed
This report is based on 1 SEC document filed with EDGAR.
| Document | Accession Number |
|---|---|
| CLUSTER Data (Synthetic) | cluster-CBRS-1787810867056 |
Filters
| Type | Now | ||||
|---|---|---|---|---|---|
Sep 9, 2026 23d ago | Insider Cluster | $196.20 $190.47 | ▲ +2.92% | ▲ +2.26% | $169.52 (+13.60%) |
Sep 4, 2026 27d ago | 144 | $199.77 $184.03 | ▼ −7.88% | ▼ −6.76% | $169.52 (−15.14%) |
Sep 1, 2026 4w ago | Press Release | $172.62 $196.20 | ▲ +13.66% | ▲ +13.58% | $169.52 (−1.80%) |
Aug 25, 2026 5w ago | Insider Cluster | $182.15 $184.52 | ▲ +1.30% | ▲ +1.42% | $169.52 (−6.93%) |
Aug 25, 2026 5w ago | Insider Cluster | $182.15 $184.52 | ▼ −1.30% | ▼ −1.42% | $169.52 (+6.93%) |
Aug 25, 2026 5w ago | Insider Cluster | $182.15 $184.52 | ▼ −1.30% | ▼ −1.42% | $169.52 (+6.93%) |
Aug 22, 2026 5w ago | Insider Cluster | $185.43 $184.24 | ▲ +0.64% | ▲ +1.11% | $169.52 (+8.58%) |
Aug 21, 2026 6w ago | Insider Cluster | $196.13 $179.08 | ▼ −8.69% | ▼ −9.17% | $169.52 (−13.57%) |
Aug 19, 2026 6w ago | Insider Cluster | $209.76 $186.67 | ▼ −11.01% | ▼ −12.12% | $169.52 (−19.18%) |
Aug 19, 2026 6w ago | Insider Cluster | $209.76 $186.67 | ▼ −11.01% | ▼ −12.12% | $169.52 (−19.18%) |
US Market Status
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