Dhiraj Mallick sold $81M of CBRS
Chief Operating Officer at Cerebras Systems Inc.. 396,000 shares at an average of $204.04, traded Sep 29, 2026, filed Sep 30, 2026.
Score components
- +20RoleCOO
- +25Trade size$80.8M at market
- +20Share of holdings soldSold 100% of holdings
- +15Cluster4 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 0001628280-26-064042, as filed. Open on EDGAR
| Date | Transaction | Shares | Price | Value | Holdings after | Filed |
|---|---|---|---|---|---|---|
| Sep 29, 2026 | CConversion Class A Common Stock10b5-1 | +276,000 | $0.00 | $0 | 396,000 | 14 d ago |
| Sep 29, 2026 | SOpen-market sale Class A Common Stock10b5-1 | -598 | $212.93 | $127k | 395,402 | 14 d ago |
| Sep 29, 2026 | SOpen-market sale Class A Common Stock10b5-1 | -18,274 | $212.20 | $3.9M | 377,128 | 14 d ago |
| Sep 29, 2026 | SOpen-market sale Class A Common Stock10b5-1 | -41,391 | $211.29 | $8.7M | 335,737 | 14 d ago |
| Sep 29, 2026 | SOpen-market sale Class A Common Stock10b5-1 | -46,427 | $210.27 | $9.8M | 289,310 | 14 d ago |
| Sep 29, 2026 | SOpen-market sale Class A Common Stock10b5-1 | -41,278 | $209.33 | $8.6M | 248,032 | 14 d ago |
| Sep 29, 2026 | SOpen-market sale Class A Common Stock10b5-1 | -20,714 | $208.38 | $4.3M | 227,318 | 14 d ago |
| Sep 29, 2026 | SOpen-market sale Class A Common Stock10b5-1 | -9,652 | $207.06 | $2.0M | 217,666 | 14 d ago |
| Sep 29, 2026 | SOpen-market sale Class A Common Stock10b5-1 | -9,047 | $206.13 | $1.9M | 208,619 | 14 d ago |
| Sep 29, 2026 | SOpen-market sale Class A Common Stock10b5-1 | -8,729 | $205.17 | $1.8M | 199,890 | 14 d ago |
| Sep 29, 2026 | SOpen-market sale Class A Common Stock10b5-1 | -27,492 | $204.17 | $5.6M | 172,398 | 14 d ago |
| Sep 29, 2026 | SOpen-market sale Class A Common Stock10b5-1 | -9,682 | $203.37 | $2.0M | 162,716 | 14 d ago |
| Sep 29, 2026 | SOpen-market sale Class A Common Stock10b5-1 | -5,637 | $201.91 | $1.1M | 157,079 | 14 d ago |
| Sep 29, 2026 | SOpen-market sale Class A Common Stock10b5-1 | -22,915 | $200.96 | $4.6M | 134,164 | 14 d ago |
| Sep 29, 2026 | SOpen-market sale Class A Common Stock10b5-1 | -17,848 | $199.89 | $3.6M | 116,316 | 14 d ago |
| Sep 29, 2026 | SOpen-market sale Class A Common Stock10b5-1 | -17,000 | $198.96 | $3.4M | 99,316 | 14 d ago |
| Sep 29, 2026 | SOpen-market sale Class A Common Stock10b5-1 | -5,170 | $197.85 | $1.0M | 94,146 | 14 d ago |
| Sep 29, 2026 | SOpen-market sale Class A Common Stock10b5-1 | -6,613 | $197.05 | $1.3M | 87,533 | 14 d ago |
| Sep 29, 2026 | SOpen-market sale Class A Common Stock10b5-1 | -18,703 | $195.56 | $3.7M | 68,830 | 14 d ago |
| Sep 29, 2026 | SOpen-market sale Class A Common Stock10b5-1 | -68,830 | $194.91 | $13M | 0 | 14 d ago |
| Sep 29, 2026 | MOption exercise Stock Optionderivative10b5-1 | -276,000 | $0.00 | $0 | 91,370 | 14 d ago |
| Sep 29, 2026 | MOption exercise Class B Common Stockderivative10b5-1 | +276,000 | $0.00 | $0 | 796,807 | 14 d ago |
| Sep 29, 2026 | CConversion Class B Common Stockderivative10b5-1 | -276,000 | $0.00 | $0 | 520,807 | 14 d ago |
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% | |
| 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% | |
| 40Moderate | Cerebras Systems Inc. | Sean Lie Chief Technology Officer | $151M 726,540 shares | -67% | |
| 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.