Cerebras Systems Inc. (CBRS) — insider trading
Information Technology · NASDAQ
Cerebras Systems Inc. (CBRS) has 630 reported SEC Form 4 insider transactions in our data, including 65 open-market sales among the most recent 100 (latest 2026-10-05).
Recent Form 4 transactions
Showing the 100 most recent of 630 recorded transactions. See all on SEC EDGAR →
| Date | Insider | Role | Type | Shares | Price | Value | Filing |
|---|---|---|---|---|---|---|---|
| 2026-10-05 | Vishria Eric | Director | Other acquisition or disposition | 59,126 | — | $0 | Form 4 |
| 2026-10-05 | Feldman Andrew D. | Director, Officer (CEO, President) | Other acquisition or disposition | 159 | — | $0 | Form 4 |
| 2026-09-30 | Susan Lior | Director | Other acquisition or disposition | 63,056 | — | — | Form 4 |
| 2026-09-30 | Susan Lior | Director | Other acquisition or disposition | 68,428 | — | — | Form 4 |
| 2026-09-30 | Susan Lior | Director | Other acquisition or disposition | 1,198,489 | — | — | Form 4 |
| 2026-09-29 | Komin Robert Patrick Jr. | Officer (Chief Financial Officer) | Open-market sale | 3,000 | $194.92 | $584.8K | Form 4 |
| 2026-09-29 | Komin Robert Patrick Jr. | Officer (Chief Financial Officer) | Open-market sale | 1,115 | $195.61 | $218.1K | Form 4 |
| 2026-09-29 | Komin Robert Patrick Jr. | Officer (Chief Financial Officer) | Open-market sale | 685 | $197.48 | $135.3K | Form 4 |
| 2026-09-29 | Komin Robert Patrick Jr. | Officer (Chief Financial Officer) | Open-market sale | 870 | $198.70 | $172.9K | Form 4 |
| 2026-09-29 | Komin Robert Patrick Jr. | Officer (Chief Financial Officer) | Open-market sale | 1,130 | $199.80 | $225.8K | Form 4 |
| 2026-09-29 | Komin Robert Patrick Jr. | Officer (Chief Financial Officer) | Open-market sale | 11,200 | $201.22 | $2.25M | Form 4 |
| 2026-09-29 | Komin Robert Patrick Jr. | Officer (Chief Financial Officer) | Open-market sale | 400 | $201.96 | $80.8K | Form 4 |
| 2026-09-29 | Komin Robert Patrick Jr. | Officer (Chief Financial Officer) | Open-market sale | 800 | $203.48 | $162.8K | Form 4 |
| 2026-09-29 | Komin Robert Patrick Jr. | Officer (Chief Financial Officer) | Open-market sale | 1,600 | $204.26 | $326.8K | Form 4 |
| 2026-09-29 | Komin Robert Patrick Jr. | Officer (Chief Financial Officer) | Open-market sale | 600 | $205.47 | $123.3K | Form 4 |
| 2026-09-29 | Komin Robert Patrick Jr. | Officer (Chief Financial Officer) | Open-market sale | 800 | $206.68 | $165.3K | Form 4 |
| 2026-09-29 | Komin Robert Patrick Jr. | Officer (Chief Financial Officer) | Open-market sale | 700 | $207.83 | $145.5K | Form 4 |
| 2026-09-29 | Komin Robert Patrick Jr. | Officer (Chief Financial Officer) | Open-market sale | 2,197 | $208.98 | $459.1K | Form 4 |
| 2026-09-29 | Komin Robert Patrick Jr. | Officer (Chief Financial Officer) | Open-market sale | 2,802 | $210.02 | $588.5K | Form 4 |
| 2026-09-29 | Komin Robert Patrick Jr. | Officer (Chief Financial Officer) | Open-market sale | 2,771 | $211.03 | $584.8K | Form 4 |
| 2026-09-29 | Komin Robert Patrick Jr. | Officer (Chief Financial Officer) | Open-market sale | 1,830 | $211.79 | $387.6K | Form 4 |
| 2026-09-29 | Mallick Dhiraj | Officer (Chief Operating Officer) | Conversion of derivative (derivative) | 276,000 | — | $0 | Form 4 |
| 2026-09-29 | Mallick Dhiraj | Officer (Chief Operating Officer) | Option exercise / conversion (derivative) | 276,000 | — | $0 | Form 4 |
| 2026-09-29 | Mallick Dhiraj | Officer (Chief Operating Officer) | Option exercise / conversion (derivative) | 276,000 | — | $0 | Form 4 |
| 2026-09-29 | Mallick Dhiraj | Officer (Chief Operating Officer) | Open-market sale | 68,830 | $194.91 | $13.42M | Form 4 |
| 2026-09-29 | Mallick Dhiraj | Officer (Chief Operating Officer) | Open-market sale | 18,703 | $195.56 | $3.66M | Form 4 |
| 2026-09-29 | Mallick Dhiraj | Officer (Chief Operating Officer) | Open-market sale | 6,613 | $197.05 | $1.30M | Form 4 |
| 2026-09-29 | Mallick Dhiraj | Officer (Chief Operating Officer) | Open-market sale | 5,170 | $197.85 | $1.02M | Form 4 |
| 2026-09-29 | Mallick Dhiraj | Officer (Chief Operating Officer) | Open-market sale | 17,000 | $198.96 | $3.38M | Form 4 |
| 2026-09-29 | Mallick Dhiraj | Officer (Chief Operating Officer) | Open-market sale | 17,848 | $199.89 | $3.57M | Form 4 |
| 2026-09-29 | Mallick Dhiraj | Officer (Chief Operating Officer) | Open-market sale | 22,915 | $200.96 | $4.60M | Form 4 |
| 2026-09-29 | Mallick Dhiraj | Officer (Chief Operating Officer) | Open-market sale | 5,637 | $201.91 | $1.14M | Form 4 |
| 2026-09-29 | Mallick Dhiraj | Officer (Chief Operating Officer) | Open-market sale | 9,682 | $203.37 | $1.97M | Form 4 |
| 2026-09-29 | Mallick Dhiraj | Officer (Chief Operating Officer) | Open-market sale | 27,492 | $204.17 | $5.61M | Form 4 |
| 2026-09-29 | Mallick Dhiraj | Officer (Chief Operating Officer) | Open-market sale | 8,729 | $205.17 | $1.79M | Form 4 |
| 2026-09-29 | Mallick Dhiraj | Officer (Chief Operating Officer) | Open-market sale | 9,047 | $206.13 | $1.86M | Form 4 |
| 2026-09-29 | Mallick Dhiraj | Officer (Chief Operating Officer) | Open-market sale | 9,652 | $207.06 | $2.00M | Form 4 |
| 2026-09-29 | Mallick Dhiraj | Officer (Chief Operating Officer) | Open-market sale | 20,714 | $208.38 | $4.32M | Form 4 |
| 2026-09-29 | Mallick Dhiraj | Officer (Chief Operating Officer) | Open-market sale | 41,278 | $209.33 | $8.64M | Form 4 |
| 2026-09-29 | Mallick Dhiraj | Officer (Chief Operating Officer) | Open-market sale | 46,427 | $210.27 | $9.76M | Form 4 |
| 2026-09-29 | Mallick Dhiraj | Officer (Chief Operating Officer) | Open-market sale | 41,391 | $211.29 | $8.75M | Form 4 |
| 2026-09-29 | Mallick Dhiraj | Officer (Chief Operating Officer) | Open-market sale | 18,274 | $212.20 | $3.88M | Form 4 |
| 2026-09-29 | Mallick Dhiraj | Officer (Chief Operating Officer) | Open-market sale | 598 | $212.93 | $127.3K | Form 4 |
| 2026-09-29 | Mallick Dhiraj | Officer (Chief Operating Officer) | Conversion of derivative | 276,000 | — | $0 | Form 4 |
| 2026-09-28 | Patel Yagnesh | Officer (Chief Accounting Officer) | Open-market sale | 1,320 | $204.50 | $269.9K | Form 4 |
| 2026-09-25 | Lie Sean | Officer (Chief Technology Officer) | Conversion of derivative (derivative) | 120,000 | — | $0 | Form 4 |
| 2026-09-25 | Lie Sean | Officer (Chief Technology Officer) | Option exercise / conversion (derivative) | 120,000 | — | $0 | Form 4 |
| 2026-09-25 | Lie Sean | Officer (Chief Technology Officer) | Option exercise / conversion (derivative) | 3,125 | — | $0 | Form 4 |
| 2026-09-25 | Lie Sean | Officer (Chief Technology Officer) | Option exercise / conversion (derivative) | 116,875 | — | $0 | Form 4 |
| 2026-09-25 | Lie Sean | Officer (Chief Technology Officer) | Open-market sale | 2,200 | $204.50 | $449.9K | Form 4 |
| 2026-09-25 | Lie Sean | Officer (Chief Technology Officer) | Open-market sale | 5,900 | $205.30 | $1.21M | Form 4 |
| 2026-09-25 | Lie Sean | Officer (Chief Technology Officer) | Open-market sale | 13,776 | $206.63 | $2.85M | Form 4 |
| 2026-09-25 | Lie Sean | Officer (Chief Technology Officer) | Open-market sale | 6,869 | $207.54 | $1.43M | Form 4 |
| 2026-09-25 | Lie Sean | Officer (Chief Technology Officer) | Open-market sale | 21,022 | $208.41 | $4.38M | Form 4 |
| 2026-09-25 | Lie Sean | Officer (Chief Technology Officer) | Open-market sale | 29,991 | $209.53 | $6.28M | Form 4 |
| 2026-09-25 | Lie Sean | Officer (Chief Technology Officer) | Open-market sale | 30,565 | $210.45 | $6.43M | Form 4 |
| 2026-09-25 | Lie Sean | Officer (Chief Technology Officer) | Open-market sale | 9,177 | $211.32 | $1.94M | Form 4 |
| 2026-09-25 | Lie Sean | Officer (Chief Technology Officer) | Open-market sale | 500 | $212.14 | $106.1K | Form 4 |
| 2026-09-25 | Lie Sean | Officer (Chief Technology Officer) | Bona fide gift | 36,000 | — | $0 | Form 4 |
| 2026-09-25 | Lie Sean | Officer (Chief Technology Officer) | Conversion of derivative | 120,000 | — | — | Form 4 |
| 2026-09-23 | Susan Lior | Director | Other acquisition or disposition | 23,735 | — | — | Form 4 |
| 2026-09-23 | Susan Lior | Director | Other acquisition or disposition | 25,757 | — | — | Form 4 |
| 2026-09-23 | Susan Lior | Director | Other acquisition or disposition | 451,118 | — | — | Form 4 |
| 2026-09-21 | Feldman Andrew D. | Director, Officer (CEO, President) | Other acquisition or disposition | 120 | — | $0 | Form 4 |
| 2026-09-21 | Vishria Eric | Director | Other acquisition or disposition | 44,507 | — | $0 | Form 4 |
| 2026-09-15 | Susan Lior | Director | Other acquisition or disposition | 23,734 | — | — | Form 4 |
| 2026-09-15 | Susan Lior | Director | Other acquisition or disposition | 24,463 | — | — | Form 4 |
| 2026-09-15 | Susan Lior | Director | Other acquisition or disposition | 451,115 | — | — | Form 4 |
| 2026-09-08 | Vishria Eric | Director | Other acquisition or disposition | 44,507 | — | $0 | Form 4 |
| 2026-09-08 | Feldman Andrew D. | Director, Officer (CEO, President) | Other acquisition or disposition | 120 | — | $0 | Form 4 |
| 2026-09-04 | Vassallo Steven | Director | Open-market sale | 7,110 | $211.56 | $1.50M | Form 4 |
| 2026-09-04 | Vassallo Steven | Director | Open-market sale | 21,773 | $210.37 | $4.58M | Form 4 |
| 2026-09-04 | Vassallo Steven | Director | Open-market sale | 21,117 | $209.81 | $4.43M | Form 4 |
| 2026-09-04 | Lie Sean | Officer (Chief Technology Officer) | Conversion of derivative (derivative) | 46,141 | — | $0 | Form 4 |
| 2026-09-04 | Lie Sean | Officer (Chief Technology Officer) | Option exercise / conversion (derivative) | 46,141 | — | $0 | Form 4 |
| 2026-09-04 | Lie Sean | Officer (Chief Technology Officer) | Option exercise / conversion (derivative) | 46,141 | — | $0 | Form 4 |
| 2026-09-04 | Lie Sean | Officer (Chief Technology Officer) | Open-market sale | 53,460 | $210.16 | $11.24M | Form 4 |
| 2026-09-04 | Lie Sean | Officer (Chief Technology Officer) | Bona fide gift | 16,038 | — | $0 | Form 4 |
| 2026-09-04 | Lie Sean | Officer (Chief Technology Officer) | Conversion of derivative | 46,141 | — | — | Form 4 |
| 2026-09-04 | Feldman Andrew D. | Director, Officer (CEO, President) | Conversion of derivative (derivative) | 37,441 | — | $0 | Form 4 |
| 2026-09-04 | Feldman Andrew D. | Director, Officer (CEO, President) | Option exercise / conversion (derivative) | 37,441 | — | $0 | Form 4 |
| 2026-09-04 | Feldman Andrew D. | Director, Officer (CEO, President) | Option exercise / conversion (derivative) | 37,441 | — | $0 | Form 4 |
| 2026-09-04 | Feldman Andrew D. | Director, Officer (CEO, President) | Open-market sale | 100 | $216.62 | $21.7K | Form 4 |
| 2026-09-04 | Feldman Andrew D. | Director, Officer (CEO, President) | Open-market sale | 600 | $215.81 | $129.5K | Form 4 |
| 2026-09-04 | Feldman Andrew D. | Director, Officer (CEO, President) | Open-market sale | 1,400 | $214.98 | $301.0K | Form 4 |
| 2026-09-04 | Feldman Andrew D. | Director, Officer (CEO, President) | Open-market sale | 3,897 | $213.95 | $833.8K | Form 4 |
| 2026-09-04 | Feldman Andrew D. | Director, Officer (CEO, President) | Open-market sale | 3,324 | $213.04 | $708.1K | Form 4 |
| 2026-09-04 | Feldman Andrew D. | Director, Officer (CEO, President) | Open-market sale | 7,439 | $211.85 | $1.58M | Form 4 |
| 2026-09-04 | Feldman Andrew D. | Director, Officer (CEO, President) | Open-market sale | 6,153 | $210.91 | $1.30M | Form 4 |
| 2026-09-04 | Feldman Andrew D. | Director, Officer (CEO, President) | Open-market sale | 6,721 | $209.99 | $1.41M | Form 4 |
| 2026-09-04 | Feldman Andrew D. | Director, Officer (CEO, President) | Open-market sale | 1,707 | $208.84 | $356.5K | Form 4 |
| 2026-09-04 | Feldman Andrew D. | Director, Officer (CEO, President) | Open-market sale | 1,500 | $207.80 | $311.7K | Form 4 |
| 2026-09-04 | Feldman Andrew D. | Director, Officer (CEO, President) | Open-market sale | 800 | $206.30 | $165.0K | Form 4 |
| 2026-09-04 | Feldman Andrew D. | Director, Officer (CEO, President) | Open-market sale | 1,200 | $204.06 | $244.9K | Form 4 |
| 2026-09-04 | Feldman Andrew D. | Director, Officer (CEO, President) | Open-market sale | 900 | $202.97 | $182.7K | Form 4 |
| 2026-09-04 | Feldman Andrew D. | Director, Officer (CEO, President) | Open-market sale | 300 | $201.75 | $60.5K | Form 4 |
| 2026-09-04 | Feldman Andrew D. | Director, Officer (CEO, President) | Open-market sale | 300 | $200.79 | $60.2K | Form 4 |
| 2026-09-04 | Feldman Andrew D. | Director, Officer (CEO, President) | Open-market sale | 1,100 | $199.18 | $219.1K | Form 4 |
| 2026-09-04 | Feldman Andrew D. | Director, Officer (CEO, President) | Conversion of derivative | 37,441 | — | $0 | Form 4 |
| 2026-09-02 | Susan Lior | Director | Other acquisition or disposition | 47,470 | — | — | Form 4 |
Ask the chat about CBRS's insider activity →
Transaction types are the SEC Form 4 codes: open-market purchases (P) and sales (S) are the only rows that reflect open-market conviction. Awards/vesting (A), option exercises (M/X/C), shares withheld for taxes (F) and gifts (G) are compensation or mechanical, not buying or selling on the open market. Sales may be planned and non-discretionary (e.g. a Rule 10b5-1 plan); open-market buying is not a recommendation to buy. Informational only — not financial advice.
Source: SEC EDGAR Form 3/4/5. See the full company profile: Cerebras Systems Inc. (CBRS).
Last updated 2026-10-05 (most recent filing date).
Informational only — NOT financial advice. Insider filings are sourced from SEC EDGAR and shown with their reported dates.