Dhiraj Mallick is COO at Cerebras Systems Inc. (CBRS). They have made 4 open-market trades across 1 company since 2026, most recently 2026-09-29.
CIK 0002039572
Unrated. We grade insiders only on stock they chose to buy on the open market. Grants, option exercises and vesting say nothing about timing, so they don't count — which is why someone can file often and still have no grade. It isn't a bad sign: unrated buys beat every graded tier below A.
0 open-market purchases, against 4 sales. Too few scored purchases to measure a record yet.
| Ticker | Shares | Value |
|---|---|---|
| CBRS | 68,830 | $8.8M |
Shares reported on the most recent Form 4, priced at the 2026-09-30 close.
Counted per filing, not per execution lot — a purchase filled in several tranches is one decision.
| Ticker | Type | Traded | Filed | Price | Value | 7d Stock | 30d Stock | 90d Stock |
|---|---|---|---|---|---|---|---|---|
| CBRS | SELL · 10b5-1 | 2026-09-29 | 2026-09-30 | $204.04 | $80.8M | -19.2% | — | — |
| CBRS | SELL | 2026-08-18 | 2026-08-20 | $222.22 | $8.6M | -17.5% | -0.6% | — |
| CBRS | SELL | 2026-06-30 | 2026-07-01 | $206.51 | $2.1M | -7.6% | -9.8% | -11.6% |
| CBRS | SELL | 2026-06-25 | 2026-06-29 | $169.28 | $6.1M | +3.9% | -18.3% | -5.0% |
| CBRS | SELL | 2026-06-25 | 2026-06-29 | $178.19 | $5.9M | +3.9% | -18.3% | -5.0% |
Grouped by shared companies and similar filing behaviour. This is a similarity measure, not a ranking or a performance signal.