Sean Lie sold $151M of CBRS
Chief Technology Officer at Cerebras Systems Inc.. 726,540 shares at an average of $207.90, traded Aug 20, 2026, filed Aug 21, 2026.
Score components
- +15RoleOfficer
- +25Trade size$151.1M at market
- +20Share of holdings soldSold 67% of holdings
- +15Cluster6 insiders selling within 14 days
- -15Exercise and sellShares came from an option exercise in the same filing
- -2010b5-1 planPre-scheduled under a 10b5-1 plan
What happened after comparable sells
Same side and tier, against the S&P 500, at 1, 3 and 6 months. Shown to Pro users; the whole table is on the backtest page.
Price around the trade, and since
From a quarter before the trade to today. The arrow is the trade, the circle the day the filing reached EDGAR, which is the first day anyone outside could act; the dotted line is the S&P 500 rebased to that day's close.
Daily candles, adjusted for splits and dividends. Green arrows are insider buys, red are sells, sized by value; the dashed line is the close on the filing day, the dotted line SPY rebased to it.Charts by TradingView Lightweight Charts™
Rows in this filing
Every transaction in Form 4 0001628280-26-058506, as filed. Open on EDGAR
| Date | Transaction | Shares | Price | Value | Holdings after | Filed |
|---|---|---|---|---|---|---|
| Aug 20, 2026 | CConversion Class A Common Stock | +696,798 | - | - | 1,292,247 | Aug 21, 2026 |
| Aug 20, 2026 | GGift Class A Common Stock | -213,074 | $0.00 | $0 | 1,079,173 | Aug 21, 2026 |
| Aug 20, 2026 | SOpen-market sale Class A Common Stock10b5-1 | -11,706 | $203.78 | $2.4M | 1,067,467 | Aug 21, 2026 |
| Aug 20, 2026 | SOpen-market sale Class A Common Stock10b5-1 | -47,766 | $204.87 | $9.8M | 1,019,701 | Aug 21, 2026 |
| Aug 20, 2026 | SOpen-market sale Class A Common Stock10b5-1 | -133,383 | $205.67 | $27M | 886,318 | Aug 21, 2026 |
| Aug 20, 2026 | SOpen-market sale Class A Common Stock10b5-1 | -93,017 | $206.67 | $19M | 793,301 | Aug 21, 2026 |
| Aug 20, 2026 | SOpen-market sale Class A Common Stock10b5-1 | -108,507 | $207.68 | $23M | 684,794 | Aug 21, 2026 |
| Aug 20, 2026 | SOpen-market sale Class A Common Stock10b5-1 | -119,311 | $208.69 | $25M | 565,483 | Aug 21, 2026 |
| Aug 20, 2026 | SOpen-market sale Class A Common Stock10b5-1 | -114,976 | $209.86 | $24M | 450,507 | Aug 21, 2026 |
| Aug 20, 2026 | SOpen-market sale Class A Common Stock10b5-1 | -46,214 | $210.56 | $9.7M | 404,293 | Aug 21, 2026 |
| Aug 20, 2026 | SOpen-market sale Class A Common Stock10b5-1 | -10,715 | $211.42 | $2.3M | 393,578 | Aug 21, 2026 |
| Aug 20, 2026 | SOpen-market sale Class A Common Stock10b5-1 | -24,652 | $212.64 | $5.2M | 368,926 | Aug 21, 2026 |
| Aug 21, 2026 | CConversion Class A Common Stock | +16,293 | $0.00 | $0 | 385,219 | Aug 21, 2026 |
| Aug 21, 2026 | SOpen-market sale Class A Common Stock10b5-1 | -16,293 | $210.01 | $3.4M | 368,926 | Aug 21, 2026 |
| Aug 20, 2026 | MOption exercise Stock Optionderivative | -308,236 | $0.00 | $0 | 41,764 | Aug 21, 2026 |
| Aug 20, 2026 | MOption exercise Stock Optionderivative | -138,236 | $0.00 | $0 | 36,764 | Aug 21, 2026 |
| Aug 20, 2026 | MOption exercise Stock Optionderivative | -87,326 | $0.00 | $0 | 12,674 | Aug 21, 2026 |
| Aug 20, 2026 | MOption exercise Stock Optionderivative | -114,455 | $0.00 | $0 | 35,545 | Aug 21, 2026 |
| Aug 20, 2026 | MOption exercise Stock Optionderivative | -48,545 | $0.00 | $0 | 351,455 | Aug 21, 2026 |
| Aug 20, 2026 | MOption exercise Class B Common Stockderivative | +696,798 | $0.00 | $0 | 8,279,790 | Aug 21, 2026 |
| Aug 20, 2026 | CConversion Class B Common Stockderivative | -696,798 | $0.00 | $0 | 7,582,992 | Aug 21, 2026 |
| Aug 21, 2026 | MOption exercise Stock Optionderivative | -16,293 | $0.00 | $0 | 335,162 | Aug 21, 2026 |
| Aug 21, 2026 | MOption exercise Class B Common Stockderivative | +16,293 | $0.00 | $0 | 7,599,285 | Aug 21, 2026 |
| Aug 21, 2026 | CConversion Class B Common Stockderivative | -16,293 | $0.00 | $0 | 7,582,992 | Aug 21, 2026 |
Related signals
Other insiders at Cerebras Systems Inc. and this insider’s other filings.
| Score | Company | Insider | Value | Holdings | Filed |
|---|---|---|---|---|---|
| 23Weak | Cerebras Systems Inc. | Yagnesh Patel Chief Accounting Officer | $270k 1,320 shares | -8% | |
| 45Moderate | Cerebras Systems Inc. | Dhiraj Mallick Chief Operating Officer | $81M 396,000 shares | -100% | |
| 62Notable | Cerebras Systems Inc. | Robert Patrick Komin Jr. Chief Financial Officer | $6.6M 32,500 shares | -100% | |
| 30Weak | Cerebras Systems Inc. | Sean Lie Chief Technology Officer | $25M 120,000 shares | -28% | |
| 50Moderate | Cerebras Systems Inc. | Andrew D. Feldman CEO, President | $7.9M 37,441 shares | -69% | |
| 25Weak | Cerebras Systems Inc. | Sean Lie Chief Technology Officer | $11M 53,460 shares | -13% | |
| 60Notable | Cerebras Systems Inc. | Steven Vassallo director | $11M 50,000 shares | -23% | |
| 50Moderate | Cerebras Systems Inc. | Andrew D. Feldman CEO, President | $47M 237,559 shares | -93% | |
| 55Moderate | Cerebras Systems Inc. | Sean Lie Chief Technology Officer | $4.7M 21,257 shares | -3% | |
| 65Notable | Cerebras Systems Inc. | Dhiraj Mallick Chief Operating Officer | $8.6M 38,889 shares | -24% |
Not investment advice. Scores and forward returns are decision support built from public SEC filings and past prices; they describe what happened after comparable filings, not what will happen after this one. Do your own research and size your risk.