CBRS · Insider Trading
Cerebras Systems Inc. Class A Common Stock
Every open-market purchase and sale reported by CBRS officers, directors and 10%+ beneficial owners on SEC Form 4, which must be filed within two business days of the transaction. Sales often reflect scheduled 10b5-1 plans or tax withholding rather than a directional view, so read counts alongside the size and the filer.
| Filed | Insider | Role | Type | Shares | Value |
|---|---|---|---|---|---|
| 2026-09-30 | Yagnesh Patel | Chief Accounting Officer | Sell | — | — |
| 2026-09-30 | Robert Patrick Komin Jr. | Chief Financial Officer | Sell | — | — |
| 2026-09-30 | Dhiraj Mallick | Chief Operating Officer | MIXED | — | — |
| 2026-09-28 | Sean Lie | Chief Technology Officer | MIXED | — | — |
| 2026-09-25 | Lior Susan | Director | J | — | — |
| 2026-09-23 | Eric Vishria | Director | J | — | — |
| 2026-09-23 | Andrew D. Feldman | CEO, President | J | — | — |
| 2026-09-17 | Lior Susan | Director | J | — | — |
| 2026-09-10 | Eric Vishria | Director | J | — | — |
| 2026-09-08 | Steven Vassallo | Director | Sell | — | — |
| 2026-09-08 | Sean Lie | Chief Technology Officer | MIXED | — | — |
| 2026-09-08 | Andrew D. Feldman | CEO, President | MIXED | — | — |
| 2026-09-04 | Lior Susan | Director | J | — | — |
| 2026-08-26 | Benchmark AI Infrastructure Management Co., L.L.C. | 10%+ Owner | — | — | — |
| 2026-08-26 | Eric Vishria | Director | J | — | — |
| 2026-08-26 | Benchmark Capital Partners VIII, L.P. | 10%+ Owner | MIXED | — | — |
| 2026-08-25 | Andrew D. Feldman | CEO, President | MIXED | — | — |
| 2026-08-25 | Steven Vassallo | Director | MIXED | — | — |
| 2026-08-25 | Foundation Capital VIII, L.P. | 10%+ Owner | MIXED | — | — |
| 2026-08-21 | Lior Susan | Director | J | — | — |
| 2026-08-21 | Sean Lie | Chief Technology Officer | MIXED | — | — |
| 2026-08-20 | Robert Patrick Komin Jr. | Chief Financial Officer | C | — | — |
| 2026-08-20 | Dhiraj Mallick | Chief Operating Officer | MIXED | — | — |
| 2026-08-20 | Sean Lie | Chief Technology Officer | MIXED | — | — |
| 2026-08-20 | Steven Vassallo | Director | MIXED | — | — |
| 2026-08-20 | Foundation Capital VIII Principals Fund, L.L.C. | 10%+ Owner | MIXED | — | — |
| 2026-08-20 | Yagnesh Patel | Chief Accounting Officer | MIXED | — | — |
| 2026-08-19 | Eric Vishria | Director | MIXED | — | — |
| 2026-08-19 | Benchmark AI Infrastructure Fund B, L.P. | 10%+ Owner | — | — | — |
| 2026-08-19 | Andrew D. Feldman | CEO, President | MIXED | — | — |
| 2026-08-19 | Benchmark Founders' Fund IX-B, L.P. | 10%+ Owner | MIXED | — | — |
| 2026-08-18 | Lior Susan | Director | J | — | — |
| 2026-08-18 | Steven Vassallo | Director | MIXED | — | — |
| 2026-08-18 | Foundation Capital Management Co. VIII, L.L.C. | 10%+ Owner | MIXED | — | — |
| 2026-07-01 | Andrew D. Feldman | CEO, President | J | — | — |
| 2026-07-01 | Eric Vishria | Director | J | — | — |
| 2026-07-01 | Dhiraj Mallick | Chief Operating Officer | MIXED | — | — |
| 2026-07-01 | Benchmark Capital Partners VIII, L.P. | 10%+ Owner | MIXED | — | — |
| 2026-06-29 | Sean Lie | Chief Technology Officer | MIXED | — | — |
| 2026-06-29 | Dhiraj Mallick | Chief Operating Officer | MIXED | — | — |
| 2026-06-29 | Yagnesh Patel | Chief Accounting Officer | MIXED | — | — |
| 2026-06-29 | Andrew D. Feldman | CEO, President | MIXED | — | — |
| 2026-06-29 | Yagnesh Patel | Chief Accounting Officer | MIXED | — | — |
| 2026-06-29 | Dhiraj Mallick | Chief Operating Officer | Sell | — | — |
| 2026-06-26 | Lior Susan | Director | J | — | — |
| 2026-06-12 | Lior Susan | Director | C | — | — |
| 2026-05-19 | Benchmark AI Infrastructure Fund B, L.P. | 10%+ Owner | C | — | — |
| 2026-05-19 | Benchmark Capital Management Co. VIII, L.L.C. | 10%+ Owner | C | — | — |
| 2026-05-19 | Foundation Capital VIII, L.P. | 10%+ Owner | C | — | — |
| 2026-05-15 | Yagnesh Patel | Chief Accounting Officer | MIXED | — | — |
| Insider | Role | Shares Held | Value |
|---|---|---|---|
| — | Director | 6,842,638 | — |
| — | 10%+ Owner | 2,402,352 | — |
| — | 10%+ Owner | 963,818 | — |
| — | Chief Technology Officer | 311,769 | — |
| — | Director | 275,854 | — |
| — | Director | 171,977 | — |
| — | 10%+ Owner | 87,313 | — |
| — | Chief Operating Officer | 68,830 | — |
| — | Chief Financial Officer | 27,899 | — |
| — | CEO, President | 17,779 | — |
| — | Chief Accounting Officer | 15,356 | — |
| — | 10%+ Owner | 1,368 | — |
Form 4 reports a change in beneficial ownership by an officer, director or 10%+ holder, and must be filed within two business days of the transaction — so this is close to real time, unlike the 45-day-lagged 13F institutional data.
Transaction codes matter more than the raw buy/sell count. Code P is an open-market purchase — an insider choosing to buy with their own money, which is the signal most research treats as informative. Code S is a sale, but sales are frequently pre-scheduled under a 10b5-1 plan or cover tax withholding on vesting equity, so a run of sales often says nothing directional. Codes A and M are grants and option exercises rather than open-market decisions.
Full filing history and per-insider positions are on the CBRS quote page; the site-wide leaderboard is on the insider transactions hub.
Market data may be delayed, incomplete, or inaccurate. Not a recommendation to buy, sell, or hold any security. Verify quotes with your broker before trading. See Terms §17.