24 insiders reported 461 Form 4 transactions for Cerebras Systems Inc. (CBRS) over the past 18 months (most recent 2026-08-21). Recent activity: Susan Lior (Director) Sell 902,235 shares, Lie Sean (Chief Technology Officer) Sell 16,293 shares, Susan Lior (Director) Buy 46,422 shares, Lie Sean (Chief Technology Officer) Sell 213,074 shares, Susan Lior (Director) Buy 46,780 shares. Source: SEC Form 4.
| Date | Insider | Title | Type | Shares | Value |
|---|---|---|---|---|---|
| 2026-08-21 | Susan Lior | Director | Sell | 902,235 | $0 |
| 2026-08-21 | Lie Sean | Chief Technology Officer | Sell | 16,293 | $3.4M |
| 2026-08-21 | Susan Lior | Director | Buy | 46,422 | $0 |
| 2026-08-21 | Lie Sean | Chief Technology Officer | Sell | 213,074 | $0 |
| 2026-08-21 | Susan Lior | Director | Buy | 46,780 | $0 |
| 2026-08-21 | Lie Sean | Chief Technology Officer | Sell | 11,706 | $2.4M |
| 2026-08-21 | Lie Sean | Chief Technology Officer | Sell | 47,766 | $9.8M |
| 2026-08-21 | Lie Sean | Chief Technology Officer | Buy | 696,798 | $0 |
| 2026-08-21 | Lie Sean | Chief Technology Officer | Sell | 93,017 | $19.2M |
| 2026-08-21 | Lie Sean | Chief Technology Officer | Sell | 108,507 | $22.5M |
| 2026-08-21 | Lie Sean | Chief Technology Officer | Sell | 119,311 | $24.9M |
| 2026-08-21 | Lie Sean | Chief Technology Officer | Sell | 114,976 | $24.1M |
| 2026-08-21 | Lie Sean | Chief Technology Officer | Sell | 46,214 | $9.7M |
| 2026-08-21 | Lie Sean | Chief Technology Officer | Sell | 10,715 | $2.3M |
| 2026-08-21 | Lie Sean | Chief Technology Officer | Sell | 24,652 | $5.2M |
| 2026-08-21 | Lie Sean | Chief Technology Officer | Buy | 16,293 | $0 |
| 2026-08-21 | Lie Sean | Chief Technology Officer | Sell | 133,383 | $27.4M |
| 2026-08-20 | Vassallo Steven | Director | Buy | 1.7M | $0 |
| 2026-08-20 | Mallick Dhiraj | Chief Operating Officer | Buy | 158,889 | $0 |
| 2026-08-20 | Foundation Capital Management Co. LF II, L.L.C. | 10% Owner | Buy | 1.7M | $0 |
| 2026-08-20 | Foundation Capital Leadership Fund II, L.P. | 10% Owner | Buy | 1.7M | $0 |
| 2026-08-20 | Foundation Capital VIII, L.P. | 10% Owner | Buy | 1.7M | $0 |
| 2026-08-20 | Lie Sean | Chief Technology Officer | Buy | 616,706 | $0 |
| 2026-08-20 | Foundation Capital VIII Principals Fund, L.L.C. | 10% Owner | Buy | 1.7M | $0 |
| 2026-08-20 | Foundation Capital Management Co. VIII, L.L.C. | 10% Owner | Buy | 1.7M | $0 |
Source: SEC Form 4 filings · as of 2026-08-21