The proposed sale is part of a pre-existing 10b5-1 trading plan and is relatively small relative to the company's market cap. However, the officer has been a significant seller in recent months, with over $240 million in sales since August 2026. Monitor for any acceleration of insider selling or changes to the 10b5-1 plan.
Price Chart
Executive Summary
Sean Lie, an officer of Cerebras Systems Inc., filed a Form 144 notice of intent to sell 60,000 shares of common stock with an approximate market value of $6.5 million. The shares are to be sold through Morgan Stanley Smith Barney LLC, with the proposed sale date of October 27, 2026. The filing also discloses that Lie has a 10b5-1 trading plan in place and has already sold substantial amounts of stock in recent months, totaling over $240 million in sales since August 2026.
Key Facts
- Sean Lie, an officer of Cerebras Systems Inc., filed Form 144 to sell 60,000 shares of common stock.
- The approximate market value of the proposed sale is $6,502,200.
- The proposed sale date is October 27, 2026.
- The shares are to be sold through Morgan Stanley Smith Barney LLC.
- Lie has a 10b5-1 trading plan in place and has executed multiple sales since August 2026.
- Prior sales by Lie since August 2026 total over $240 million, including sales to Grounded Love Fund.
- The filing indicates the shares were acquired through exercise of stock options (32,023 shares) and performance stock units (27,977 shares).
Financial Impact
Proposed sale of 60,000 shares valued at approximately $6.5 million, representing about 0.02% of the company's $26.3 billion market cap.
Risk Factors
- Insider selling by an officer, even under a 10b5-1 plan, may signal a lack of confidence or a desire to diversify.
- The cumulative selling by Sean Lie over the past few months is substantial and could weigh on sentiment.
- The filing does not disclose the exact number of shares Lie still holds, making it difficult to assess the proportion of his stake being sold.
Market Snapshot
Documents Analyzed
This report is based on 3 SEC documents filed with EDGAR.
| Document | Accession Number |
|---|---|
| 144 Filing (Primary) | 0001950047-26-010438 |
| Document: 0001950047-26-010438-index.html | 0001950047-26-010438 |
| Document: 0001950047-26-010438.txt | 0001950047-26-010438 |
Filters
| Type | Now | ||||
|---|---|---|---|---|---|
Oct 27, 2026 5d ago | 144 | $112.56 $115.16 | ▲ +2.31% | ▲ +2.69% | $109.18 (−3.00%) |
Oct 27, 2026 5d ago | Press Release | $119.31 $112.56 | ▼ −5.66% | ▼ −6.00% | $109.18 (−8.49%) |
Oct 20, 2026 12d ago | Institutional Cluster | $117.98 $108.94 | ▼ −7.66% | ▼ −6.48% | $109.18 (−7.46%) |
Oct 20, 2026 12d ago | Press Release | $117.98 | awaiting T+1 | awaiting T+1 | $109.18 (−7.46%) |
Oct 12, 2026 20d ago | Institutional Cluster | $146.62 $149.09 | ▲ +1.68% | ▲ +1.69% | $109.18 (−25.54%) |
Sep 30, 2026 4w ago | Insider Cluster | $169.52 $166.43 | ▲ +1.82% | ▲ +2.56% | $109.18 (+35.59%) |
Sep 30, 2026 4w ago | Insider Cluster | $169.52 $166.43 | ▲ +1.82% | ▲ +2.56% | $109.18 (+35.59%) |
Sep 8, 2026 7w ago | Insider Cluster | $196.20 $191.34 | ▲ +2.48% | ▲ +1.88% | $109.18 (+44.35%) |
Sep 8, 2026 7w ago | Insider Cluster | $196.20 $191.34 | ▲ +2.48% | ▲ +1.88% | $109.18 (+44.35%) |
Sep 4, 2026 8w ago | 144 | $199.77 $196.20 | ▼ −1.79% | ▼ −1.32% | $109.18 (−45.35%) |
US Market Status
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