CBRS · ISSUER CIK 2021728
Cerebras Systems Inc.
Between Jul 31, 2026 and Oct 28, 2026, 10 Cerebras Systems Inc. insiders reported $0.00 of open-market purchases and $394.6M of sales on SEC Form 4.
↗10 insiders filed
Original Form 4 filings from Jul 31, 2026 to Oct 28, 2026. 10 of 16 sales were reported under a 10b5-1 plan.
$0.00Insider buying
$394.6MInsider selling
−$394.6MNet open-market
Oct 28, 2026Latest filing
| Ticker | Insider | Type | Owned | ||||||||
|---|---|---|---|---|---|---|---|---|---|---|---|
| Oct 28, 202618:30 | Oct 27, 2026 | CBRS | Chief Technology Officer | S · Sell10b5-1 | $115.79 | −60,000 | 263,592 | -19% | −$6.9M | ||
| Oct 28, 202618:30 | Oct 27, 2026 | CBRS | Chief Technology Officer | G · Gift10b5-1 | — | −18,000 | 323,592 | -5% | — | ||
| Oct 28, 202618:30 | Oct 27, 2026 | CBRS | Chief Technology Officer | C · Convert10b5-1 | — | +32,023 | 341,592 | +10% | — | ||
| Oct 7, 202617:48 | Oct 5, 2026 | CBRS | Director | J · Other10b5-1 | — | +59,126 | 334,980 | +21% | — | ||
| Oct 6, 202616:51 | Oct 5, 2026 | CBRS | CEO, President, Director | J · Other | — | +159 | 1,085 | +17% | — | ||
| Oct 2, 202616:21 | Sep 30, 2026 | CBRS | Director | J · Other | — | −1,198,489 | 5,292,222 | -18% | — | ||
| Oct 2, 202616:21 | Sep 30, 2026 | CBRS | Director | J · Other | — | +131,484 | 420,355 | +46% | — | ||
| Sep 30, 202618:35 | Sep 29, 2026 | CBRS | Chief Financial Officer | S · Sell10b5-1 | $203.53 | −32,500 | 0 | -100% | −$6.6M | ||
| Sep 30, 202618:34 | Sep 29, 2026 | CBRS | Chief Operating Officer | S · Sell10b5-1 | $204.04 | −396,000 | 0 | -100% | −$80.8M | ||
| Sep 30, 202618:34 | Sep 29, 2026 | CBRS | Chief Operating Officer | C · Convert10b5-1 | — | +276,000 | 396,000 | +230% | — | ||
| Sep 30, 202618:33 | Sep 28, 2026 | CBRS | Chief Accounting Officer | S · Sell10b5-1 | $204.50 | −1,320 | 15,356 | -8% | −$270K | ||
| Sep 28, 202616:05 | Sep 25, 2026 | CBRS | Chief Technology Officer | S · Sell10b5-1 | $208.97 | −120,000 | 309,569 | -28% | −$25.1M | ||
| Sep 28, 202616:05 | Sep 25, 2026 | CBRS | Chief Technology Officer | G · Gift10b5-1 | — | −36,000 | 429,569 | -8% | — | ||
| Sep 28, 202616:05 | Sep 25, 2026 | CBRS | Chief Technology Officer | C · Convert10b5-1 | — | +120,000 | 465,569 | +35% | — | ||
| Sep 25, 202616:34 | Sep 23, 2026 | CBRS | Director | J · Other | — | −451,118 | 6,490,711 | -6% | — | ||
| Sep 25, 202616:34 | Sep 23, 2026 | CBRS | Director | J · Other | — | +49,492 | 351,927 | +16% | — | ||
| Sep 23, 202617:16 | Sep 21, 2026 | CBRS | CEO, President, Director | J · Other | — | +120 | 926 | +15% | — | ||
| Sep 23, 202617:10 | Sep 21, 2026 | CBRS | Director | J · Other10b5-1 | — | +44,507 | 275,854 | +19% | — | ||
| Sep 17, 202616:16 | Sep 15, 2026 | CBRS | Director | J · Other | — | −451,115 | 6,941,829 | -6% | — | ||
| Sep 17, 202616:16 | Sep 15, 2026 | CBRS | Director | J · Other | — | +48,197 | 315,124 | +18% | — | ||
| Sep 10, 202617:18 | Sep 8, 2026 | CBRS | Director | J · Other10b5-1 | — | +44,507 | 231,347 | +24% | — | ||
| Sep 8, 202620:20 | Sep 4, 2026 | CBRS | Director | S · Sell | $210.30 | −50,000 | 171,977 | -23% | −$10.5M | ||
| Sep 8, 202620:19 | Sep 4, 2026 | CBRS | Chief Technology Officer | S · Sell10b5-1 | $210.16 | −53,460 | 345,569 | -13% | −$11.2M | ||
| Sep 8, 202620:19 | Sep 4, 2026 | CBRS | Chief Technology Officer | G · Gift10b5-1 | — | −16,038 | 399,029 | -4% | — | ||
| Sep 8, 202620:19 | Sep 4, 2026 | CBRS | Chief Technology Officer | C · Convert10b5-1 | — | +46,141 | 415,067 | +13% | — | ||
| Sep 8, 202620:17 | Sep 4, 2026 | CBRS | CEO, President, Director | S · Sell10b5-1 | $210.46 | −37,441 | 16,853 | -69% | −$7.9M | ||
| Sep 8, 202620:17 | Sep 8, 2026 | CBRS | CEO, President, Director | J · Other10b5-1 | — | +120 | 806 | +17% | — | ||
| Sep 8, 202620:17 | Sep 4, 2026 | CBRS | CEO, President, Director | C · Convert10b5-1 | — | +37,441 | 54,294 | +222% | — | ||
| Sep 4, 202616:05 | Sep 2, 2026 | CBRS | Director | J · Other | — | −902,236 | 7,392,944 | -11% | — | ||
| Sep 4, 202616:05 | Sep 2, 2026 | CBRS | Director | J · Other | — | +93,925 | 290,661 | +48% | — | ||
| Aug 26, 202616:02 | Aug 24, 2026 | CBRS | Director | J · Other10b5-1 | — | +44,507 | 186,840 | +31% | — | ||
| Aug 26, 202616:01 | Aug 24, 2026 | CBRS | 10% Owner · +8 joint | J · Other10b5-1 | — | −963,818 | 0 | -100% | — | ||
| Aug 26, 202616:01 | Aug 24, 2026 | CBRS | 10% Owner · +8 joint | C · Convert10b5-1 | — | +963,818 | 963,818 | New | — | ||
| Aug 25, 202619:34 | Aug 21, 2026 | CBRS | Director | J · Other | — | −1,530,274 | 0 | -100% | — | ||
| Aug 25, 202619:34 | Aug 21, 2026 | CBRS | Director | J · Other | — | +407,803 | 139,618 | — | — | ||
| Aug 25, 202619:34 | Aug 21, 2026 | CBRS | Director | C · Convert | — | +1,224,187 | 87,313 | — | — | ||
| Aug 25, 202619:33 | Aug 21, 2026 | CBRS | 10% Owner · +4 joint | J · Other | — | −1,530,274 | 0 | -100% | — | ||
| Aug 25, 202619:33 | Aug 21, 2026 | CBRS | 10% Owner · +4 joint | J · Other | — | +306,087 | 18,155 | — | — | ||
| Aug 25, 202619:33 | Aug 21, 2026 | CBRS | 10% Owner · +4 joint | C · Convert | — | +1,224,187 | 87,313 | — | — | ||
| Aug 25, 202618:13 | Aug 21, 2026 | CBRS | CEO, President, Director | S · Sell10b5-1 | $199.27 | −237,559 | 16,853 | -93% | −$47.3M | ||
| Aug 25, 202618:13 | Aug 24, 2026 | CBRS | CEO, President, Director | J · Other10b5-1 | — | +120 | 686 | +21% | — | ||
| Aug 25, 202618:13 | Aug 21, 2026 | CBRS | CEO, President, Director | G · Gift10b5-1 | — | −50,000 | 16,853 | -75% | — | ||
| Aug 25, 202618:13 | Aug 21, 2026 | CBRS | CEO, President, Director | C · Convert10b5-1 | — | +237,559 | 254,412 | +1410% | — | ||
| Aug 21, 202620:58 | Aug 21, 2026from Aug 20, 2026 | CBRS | Chief Technology Officer | S · Sell10b5-1 | $207.90 | −726,540 | 368,926 | -66% | −$151.1M | ||
| Aug 21, 202620:58 | Aug 20, 2026 | CBRS | Chief Technology Officer | G · Gift10b5-1 | — | −213,074 | 1,079,173 | -16% | — | ||
| Aug 21, 202620:58 | Aug 21, 2026from Aug 20, 2026 | CBRS | Chief Technology Officer | C · Convert10b5-1 | — | +713,091 | 385,219 | — | — | ||
| Aug 21, 202616:15 | Aug 19, 2026 | CBRS | Director | J · Other | — | −902,235 | 8,295,180 | -10% | — | ||
| Aug 21, 202616:15 | Aug 19, 2026 | CBRS | Director | J · Other | — | +93,202 | 244,206 | +62% | — | ||
| Aug 20, 202620:53 | Aug 18, 2026 | CBRS | Director | J · Other | — | −2,392,418 | 0 | -100% | — | ||
| Aug 20, 202620:53 | Aug 18, 2026 | CBRS | Director | J · Other | — | +637,594 | 105,070 | — | — |