CBRS.NASDAQCerebras Systems INC
Form 4: Cerebras Systems COO Sells Shares
Sentiment:
Insider Transaction (Form 4)
Dhiraj Mallick, Chief Operating Officer of Cerebras Systems Inc., sold 396,000 shares of common stock on September 29, 2026.
Summary
- Conversion of derivative: acquired 276,000 Class A Common Stock on September 29, 2026; holds 396,000 after (Direct).
- Open-market sale: disposed of 598 Class A Common Stock at $212.93 ($127,332) on September 29, 2026; holds 395,402 after (Direct).
- Open-market sale: disposed of 18,274 Class A Common Stock at $212.20 ($3,877,743) on September 29, 2026; holds 377,128 after (Direct).
- Open-market sale: disposed of 41,391 Class A Common Stock at $211.29 ($8,745,504) on September 29, 2026; holds 335,737 after (Direct).
- Open-market sale: disposed of 46,427 Class A Common Stock at $210.27 ($9,762,205) on September 29, 2026; holds 289,310 after (Direct).
- Open-market sale: disposed of 41,278 Class A Common Stock at $209.33 ($8,640,724) on September 29, 2026; holds 248,032 after (Direct).
- Open-market sale: disposed of 20,714 Class A Common Stock at $208.38 ($4,316,383) on September 29, 2026; holds 227,318 after (Direct).
- Open-market sale: disposed of 9,652 Class A Common Stock at $207.06 ($1,998,543) on September 29, 2026; holds 217,666 after (Direct).
- Open-market sale: disposed of 9,047 Class A Common Stock at $206.13 ($1,864,858) on September 29, 2026; holds 208,619 after (Direct).
- Open-market sale: disposed of 8,729 Class A Common Stock at $205.17 ($1,790,929) on September 29, 2026; holds 199,890 after (Direct).
- Open-market sale: disposed of 27,492 Class A Common Stock at $204.17 ($5,613,042) on September 29, 2026; holds 172,398 after (Direct).
- Open-market sale: disposed of 9,682 Class A Common Stock at $203.37 ($1,969,028) on September 29, 2026; holds 162,716 after (Direct).
- Open-market sale: disposed of 5,637 Class A Common Stock at $201.91 ($1,138,167) on September 29, 2026; holds 157,079 after (Direct).
- Open-market sale: disposed of 22,915 Class A Common Stock at $200.96 ($4,604,998) on September 29, 2026; holds 134,164 after (Direct).
- Open-market sale: disposed of 17,848 Class A Common Stock at $199.89 ($3,567,637) on September 29, 2026; holds 116,316 after (Direct).
- Open-market sale: disposed of 17,000 Class A Common Stock at $198.96 ($3,382,320) on September 29, 2026; holds 99,316 after (Direct).
- Open-market sale: disposed of 5,170 Class A Common Stock at $197.85 ($1,022,884) on September 29, 2026; holds 94,146 after (Direct).
- Open-market sale: disposed of 6,613 Class A Common Stock at $197.05 ($1,303,092) on September 29, 2026; holds 87,533 after (Direct).
- Open-market sale: disposed of 18,703 Class A Common Stock at $195.56 ($3,657,559) on September 29, 2026; holds 68,830 after (Direct).
- Open-market sale: disposed of 68,830 Class A Common Stock at $194.91 ($13,415,655) on September 29, 2026 (Direct).
- Option exercise/conversion: disposed of 276,000 Stock Option on September 29, 2026; holds 91,370 after (Direct).
- Option exercise/conversion: acquired 276,000 Class B Common Stock on September 29, 2026; holds 796,807 after (Direct).
- Conversion of derivative: disposed of 276,000 Class B Common Stock on September 29, 2026; holds 520,807 after (Direct).
Sentiment
Score: 4
Explanation: StockSavvy.ai views this as a mildly negative but low-conviction signal: an insider sold $80,798,604 of stock under a pre-arranged Rule 10b5-1 plan, which is typically routine.
Insider Transactions
Dhiraj Mallick — Officer (Chief Operating Officer)
Transaction made under a Rule 10b5-1 trading plan.
| Date | Transaction | Security | Shares | Price | Value | Held After |
|---|---|---|---|---|---|---|
| 2026-09-29 | Conversion of derivative | Class A Common Stock | 276,000 | — | — | 396,000 |
| 2026-09-29 | Open-market sale | Class A Common Stock | 598 | $213 | $127.3K | 395,402 |
| 2026-09-29 | Open-market sale | Class A Common Stock | 18,274 | $212 | $3.9M | 377,128 |
| 2026-09-29 | Open-market sale | Class A Common Stock | 41,391 | $211 | $8.7M | 335,737 |
| 2026-09-29 | Open-market sale | Class A Common Stock | 46,427 | $210 | $9.8M | 289,310 |
| 2026-09-29 | Open-market sale | Class A Common Stock | 41,278 | $209 | $8.6M | 248,032 |
| 2026-09-29 | Open-market sale | Class A Common Stock | 20,714 | $208 | $4.3M | 227,318 |
| 2026-09-29 | Open-market sale | Class A Common Stock | 9,652 | $207 | $2.0M | 217,666 |
| 2026-09-29 | Open-market sale | Class A Common Stock | 9,047 | $206 | $1.9M | 208,619 |
| 2026-09-29 | Open-market sale | Class A Common Stock | 8,729 | $205 | $1.8M | 199,890 |
| 2026-09-29 | Open-market sale | Class A Common Stock | 27,492 | $204 | $5.6M | 172,398 |
| 2026-09-29 | Open-market sale | Class A Common Stock | 9,682 | $203 | $2.0M | 162,716 |
| 2026-09-29 | Open-market sale | Class A Common Stock | 5,637 | $202 | $1.1M | 157,079 |
| 2026-09-29 | Open-market sale | Class A Common Stock | 22,915 | $201 | $4.6M | 134,164 |
| 2026-09-29 | Open-market sale | Class A Common Stock | 17,848 | $200 | $3.6M | 116,316 |
| 2026-09-29 | Open-market sale | Class A Common Stock | 17,000 | $199 | $3.4M | 99,316 |
| 2026-09-29 | Open-market sale | Class A Common Stock | 5,170 | $198 | $1.0M | 94,146 |
| 2026-09-29 | Open-market sale | Class A Common Stock | 6,613 | $197 | $1.3M | 87,533 |
| 2026-09-29 | Open-market sale | Class A Common Stock | 18,703 | $196 | $3.7M | 68,830 |
| 2026-09-29 | Open-market sale | Class A Common Stock | 68,830 | $195 | $13.4M | 0 |
| 2026-09-29 | Option exercise/conversion | Stock Option | 276,000 | — | — | 91,370 |
| 2026-09-29 | Option exercise/conversion | Class B Common Stock | 276,000 | — | — | 796,807 |
| 2026-09-29 | Conversion of derivative | Class B Common Stock | 276,000 | — | — | 520,807 |
Key Dates
| Date | Description |
|---|---|
| 2026-09-29 | Conversion of derivative (276,000 shares) |
| 2026-09-29 | Open-market sale (598 shares) |
| 2026-09-29 | Open-market sale (18,274 shares) |
| 2026-09-29 | Open-market sale (41,391 shares) |
| 2026-09-29 | Open-market sale (46,427 shares) |
| 2026-09-29 | Open-market sale (41,278 shares) |
| 2026-09-29 | Open-market sale (20,714 shares) |
| 2026-09-29 | Open-market sale (9,652 shares) |
| 2026-09-29 | Open-market sale (9,047 shares) |
| 2026-09-29 | Open-market sale (8,729 shares) |
| 2026-09-29 | Open-market sale (27,492 shares) |
| 2026-09-29 | Open-market sale (9,682 shares) |
| 2026-09-29 | Open-market sale (5,637 shares) |
| 2026-09-29 | Open-market sale (22,915 shares) |
| 2026-09-29 | Open-market sale (17,848 shares) |
| 2026-09-29 | Open-market sale (17,000 shares) |
| 2026-09-29 | Open-market sale (5,170 shares) |
| 2026-09-29 | Open-market sale (6,613 shares) |
| 2026-09-29 | Open-market sale (18,703 shares) |
| 2026-09-29 | Open-market sale (68,830 shares) |
| 2026-09-29 | Option exercise/conversion (276,000 shares) |
| 2026-09-29 | Option exercise/conversion (276,000 shares) |
| 2026-09-29 | Conversion of derivative (276,000 shares) |
Keywords
insider transaction, Form 4, CBRS, Cerebras Systems Inc., bearish, Dhiraj Mallick
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