This insider selling cluster is too small relative to market cap to warrant a bearish read. The CTO's sales follow a large derivative conversion and appear tax/planning-driven. Monitor for any material corporate event (earnings, guidance, offering) that could explain the timing, but standalone this is noise.
Price Chart
Executive Summary
A cluster of insider selling at Cerebras Systems (CBRS) totaling $3.45M over a 7-day window, led by CTO Sean Lie (selling ~$3.0M across 20 trades on Aug 18) and two directors. The selling is concentrated in a single week and includes the CTO, CEO, and two directors, but the total value represents only ~0.007% of the $51.2B market cap — well below the 0.1% materiality threshold. The CTO's sales follow a large derivative conversion (616,706 shares at $0), suggesting tax/planning-driven liquidation rather than a bearish signal. This cluster is routine in scale and likely liquidity-motivated, not informational.
Key Financial Metrics
Key Facts
- Total insider selling of $3.45M over 7 days (Aug 11-18)
- CTO Sean Lie sold ~$3.0M across 20 trades on Aug 18 after converting 616,706 derivative shares at $0
- CEO Feldman sold 2 shares ($430) — de minimis
- Directors Vassallo ($1.32M) and Vishria ($2.13M) also sold
- Total sales = 0.007% of $51.2B market cap — trivial
Financial Impact
Total insider sales of $3.45M represent 0.007% of market cap — immaterial
Risk Factors
- Insider selling could accelerate if CTO continues to monetize converted shares
- No material corporate catalyst identified — selling may be opportunistic near all-time-high valuation
Market Snapshot
Documents Analyzed
This report is based on 1 SEC document filed with EDGAR.
| Document | Accession Number |
|---|---|
| CLUSTER Data (Synthetic) | cluster-CBRS-1787270708039 |
Filters
| Type | Now | ||||
|---|---|---|---|---|---|
Oct 20, 2026 6d ago | Institutional Cluster | $117.98 $108.94 | ▼ −7.66% | ▼ −6.48% | $108.37 (−8.15%) |
Oct 20, 2026 6d ago | Press Release | $117.98 | awaiting T+1 | — | $108.37 (−8.15%) |
Oct 12, 2026 14d ago | Institutional Cluster | $146.62 $149.09 | ▲ +1.68% | ▲ +1.69% | $108.37 (−26.09%) |
Sep 30, 2026 26d ago | Insider Cluster | $169.52 $166.43 | ▲ +1.82% | ▲ +2.56% | $108.37 (+36.07%) |
Sep 30, 2026 26d ago | Insider Cluster | $169.52 $166.43 | ▲ +1.82% | ▲ +2.56% | $108.37 (+36.07%) |
Sep 8, 2026 6w ago | Insider Cluster | $196.20 $191.34 | ▲ +2.48% | ▲ +1.88% | $108.37 (+44.77%) |
Sep 8, 2026 6w ago | Insider Cluster | $196.20 $191.34 | ▲ +2.48% | ▲ +1.88% | $108.37 (+44.77%) |
Sep 4, 2026 7w ago | 144 | $199.77 $196.20 | ▼ −1.79% | ▼ −1.32% | $108.37 (−45.75%) |
Sep 1, 2026 7w ago | Press Release | $172.62 $184.52 | ▲ +6.89% | ▲ +6.45% | $108.37 (−37.22%) |
Aug 25, 2026 8w ago | Insider Cluster | $182.15 $186.67 | ▲ +2.48% | ▲ +1.83% | $108.37 (−40.51%) |
US Market Status
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