Cerebras Systems Inc (CBRS) insider trading
Recent insider transactions reported to the SEC on Form 4 — directors and officers buying or selling their own company’s stock. Sourced directly from public SEC filings, latest filed Oct 7, 2026.
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- Filings shown
- 32
- Open-market buys
- 0
- Open-market sells
- 198
Counts cover the 32 most recent Form 4 filings Tradune holds for CBRS (filed Aug 19 – Oct 7, 2026). No completed check of CBRS's Form 4 list on SEC EDGAR is on record yet; the latest CBRS filing Tradune holds was filed Oct 7, 2026. This is not guaranteed to be the complete record — see CBRS's full Form 4 filing history on SEC EDGAR.
Open-market activity, last 90 days
Purchases (Form 4 code P) and sales (code S) on the 32 filings Tradune holds for CBRS filed Aug 19 – Oct 7, 2026. Grants, exercises, tax withholding and the other Form 4 transaction codes are left out.
198 open-market sales by Rule 10b5-1 checkbox
- On filings with the 10b5-1 box checked
- 45 sales· 549,820 sh
- checkbox disclosed
- On filings with the box not checked
- 20 sales· 140,901 sh
- not proof that no plan exists
- Not comparable
- 133 sales· 1,123,731 sh
- filed before Apr 1, 2023, or no checkbox value in the filing data
Counts are Form 4 lines as filed. The checkbox is one per filing, so every sale on a filing with the box checked is counted there even if only some of its transactions were under a plan; it records what the filer disclosed, and the three categories are not a judgement about why a sale was made.
| Insider | Buys | Sells | Shares bought | Shares sold | Value |
|---|---|---|---|---|---|
| Andrew D. FeldmanCEO, President | 0 | 55 | — | 301,644 | −$61,139,459 |
| Sean LieChief Technology Officer | 0 | 47 | — | 921,257 | −$192,085,646 |
| Dhiraj MallickChief Operating Officer | 0 | 45 | — | 434,889 | −$89,440,681 |
| Yagnesh PatelChief Accounting Officer | 0 | 26 | — | 5,894 | −$1,286,385 |
| Robert Patrick Komin Jr.Chief Financial Officer | 0 | 16 | — | 32,500 | −$6,614,882 |
| Eric VishriaDirector | 0 | 6 | — | 68,268 | −$15,685,957 |
| Steven VassalloDirector | 0 | 3 | — | 50,000 | −$10,515,135 |
Value = shares × the price reported on each Form 4 (+ purchases, − sales); every open-market line in this window disclosed a price.
Summarises ~90 days of public SEC Form 4 activity — more distinct buyers, officer involvement and net buying score higher. A description of filing activity, not a rating or buy signal. How this score is computed →
How to read this: an open-market purchase (Form 4 code P) is a buy at the market price with the insider’s own money, as opposed to a grant, award or option exercise; an open-market sale is code S. When two or more distinct insiders report open-market purchases in the same 90-day window, this site labels that a cluster — a definition, not a forecast; see insider cluster buying. “Held after” is Form 4 Table I column 5; “Change” = shares ÷ holdings before the trade (held after − shares for an acquisition, held after + shares for a disposition).
Insider Buying at CBRS
No open-market insider purchases (Form 4 code P) were reported for CBRS in the trailing 90 days. The filings below may include other transaction types — sales, grants, option exercises, and tax withholding — shown for completeness; they are not open-market purchases.
Recent Form 4 filings
Source: SEC EDGAR Form 4 · transaction codes explained
| Transaction | Shares | Price | Held after | Change† | Date |
|---|---|---|---|---|---|
| Other acquisition / disposition | 59,126 | — | 334,980 (indirect) | +21% | Oct 5, 2026 |
† change in this filer’s own reported holding line (Form 4 Table I, col. 5), not of total company ownership; small prior holdings produce large percentages, so under 100 shares the prior holding is shown instead.
| Transaction | Shares | Price | Held after | Change† | Date |
|---|---|---|---|---|---|
| Other acquisition / disposition | 159 | — | 1,085 (indirect) | +17% | Oct 5, 2026 |
| Transaction | Shares | Price | Held after | Change† | Date |
|---|---|---|---|---|---|
| Other acquisition / disposition | 1,198,489 | — | 5,292,222 (indirect) | −18% | Sep 30, 2026 |
| Other acquisition / disposition | 68,428 | — | 420,355 | +19% | Sep 30, 2026 |
| Other acquisition / disposition | 63,056 | — | 372,659 (indirect) | +20% | Sep 30, 2026 |
| Transaction | Shares | Price | Held after | Change† | Date |
|---|---|---|---|---|---|
| Open-market sale 10b5-1 box checked | 870 | $198.70 | 4,800 | −15% | Sep 29, 2026 |
| Open-market sale 10b5-1 box checked | 685 | $197.48 | 4,115 | −14% | Sep 29, 2026 |
| Open-market sale 10b5-1 box checked | 1,115 | $195.61 | 3,000 | −27% | Sep 29, 2026 |
| Open-market sale 10b5-1 box checked | 3,000 | $194.92 | 0 | −100% | Sep 29, 2026 |
| Open-market sale 10b5-1 box checked | 1,830 | $211.79 | 30,670 | −5.6% | Sep 29, 2026 |
| Open-market sale 10b5-1 box checked | 2,771 | $211.03 | 27,899 | −9.0% | Sep 29, 2026 |
| Open-market sale 10b5-1 box checked | 1,130 | $199.80 | 5,670 | −17% | Sep 29, 2026 |
| Open-market sale 10b5-1 box checked | 11,200 | $201.22 | 6,800 | −62% | Sep 29, 2026 |
| Open-market sale 10b5-1 box checked | 400 | $201.96 | 18,000 | −2.2% | Sep 29, 2026 |
| Open-market sale 10b5-1 box checked | 800 | $203.48 | 18,400 | −4.2% | Sep 29, 2026 |
| Open-market sale 10b5-1 box checked | 1,600 | $204.26 | 19,200 | −7.7% | Sep 29, 2026 |
| Open-market sale 10b5-1 box checked | 600 | $205.47 | 20,800 | −2.8% | Sep 29, 2026 |
| Open-market sale 10b5-1 box checked | 800 | $206.68 | 21,400 | −3.6% | Sep 29, 2026 |
| Open-market sale 10b5-1 box checked | 700 | $207.83 | 22,200 | −3.1% | Sep 29, 2026 |
| Open-market sale 10b5-1 box checked | 2,197 | $208.98 | 22,900 | −8.8% | Sep 29, 2026 |
| Open-market sale 10b5-1 box checked | 2,802 | $210.02 | 25,097 | −10% | Sep 29, 2026 |
“10b5-1 box checked” = the filer checked the Form 4 box stating that a transaction on the filing was made under a plan intended to satisfy Rule 10b5-1(c); “10b5-1 box not checked” = the box was left blank, which does not prove that no plan exists. The box applies to Form 4s filed from April 1, 2023; older filings, and boxes we could not read, carry no tag. What the 10b5-1 box means.
| Transaction | Shares | Price | Held after | Change† | Date |
|---|---|---|---|---|---|
| Open-market sale 10b5-1 box checked | 9,047 | $206.13 | 208,619 | −4.2% | Sep 29, 2026 |
| Open-market sale 10b5-1 box checked | 8,729 | $205.17 | 199,890 | −4.2% | Sep 29, 2026 |
| Open-market sale 10b5-1 box checked | 27,492 | $204.17 | 172,398 | −14% | Sep 29, 2026 |
| Open-market sale 10b5-1 box checked | 9,682 | $203.37 | 162,716 | −5.6% | Sep 29, 2026 |
| Open-market sale 10b5-1 box checked | 5,637 | $201.91 | 157,079 | −3.5% | Sep 29, 2026 |
| Open-market sale 10b5-1 box checked | 22,915 | $200.96 | 134,164 | −15% | Sep 29, 2026 |
| Open-market sale 10b5-1 box checked | 17,848 | $199.89 | 116,316 | −13% | Sep 29, 2026 |
| Open-market sale 10b5-1 box checked | 17,000 | $198.96 | 99,316 | −15% | Sep 29, 2026 |
| Open-market sale 10b5-1 box checked | 5,170 | $197.85 | 94,146 | −5.2% | Sep 29, 2026 |
| Open-market sale 10b5-1 box checked | 6,613 | $197.05 | 87,533 | −7.0% | Sep 29, 2026 |
| Open-market sale 10b5-1 box checked | 18,703 | $195.56 | 68,830 | −21% | Sep 29, 2026 |
| Open-market sale 10b5-1 box checked | 68,830 | $194.91 | 0 | −100% | Sep 29, 2026 |
| Option exercise Stock Option | 276,000 | — | — | — | Sep 29, 2026 |
| Option exercise Class B Common Stock | 276,000 | — | — | — | Sep 29, 2026 |
| Conversion of derivative Class B Common Stock | 276,000 | — | — | — | Sep 29, 2026 |
| Open-market sale 10b5-1 box checked | 598 | $212.93 | 395,402 | −0.2% | Sep 29, 2026 |
| Conversion of derivative | 276,000 | — | 396,000 | +230% | Sep 29, 2026 |
| Open-market sale 10b5-1 box checked | 9,652 | $207.06 | 217,666 | −4.2% | Sep 29, 2026 |
| Open-market sale 10b5-1 box checked | 20,714 | $208.38 | 227,318 | −8.4% | Sep 29, 2026 |
| Open-market sale 10b5-1 box checked | 41,278 | $209.33 | 248,032 | −14% | Sep 29, 2026 |
| Open-market sale 10b5-1 box checked | 46,427 | $210.27 | 289,310 | −14% | Sep 29, 2026 |
| Open-market sale 10b5-1 box checked | 41,391 | $211.29 | 335,737 | −11% | Sep 29, 2026 |
| Open-market sale 10b5-1 box checked | 18,274 | $212.20 | 377,128 | −4.6% | Sep 29, 2026 |
| Transaction | Shares | Price | Held after | Change† | Date |
|---|---|---|---|---|---|
| Open-market sale 10b5-1 box checked | 1,320 | $204.50 | 15,356 | −7.9% | Sep 28, 2026 |
| Transaction | Shares | Price | Held after | Change† | Date |
|---|---|---|---|---|---|
| Conversion of derivative | 120,000 | — | 465,569 | +35% | Sep 25, 2026 |
| Gift | 36,000 | — | 429,569 | −7.7% | Sep 25, 2026 |
| Open-market sale 10b5-1 box checked | 500 | $212.14 | 429,069 | −0.1% | Sep 25, 2026 |
| Open-market sale 10b5-1 box checked | 9,177 | $211.32 | 419,892 | −2.1% | Sep 25, 2026 |
| Open-market sale 10b5-1 box checked | 30,565 | $210.45 | 389,327 | −7.3% | Sep 25, 2026 |
| Open-market sale 10b5-1 box checked | 29,991 | $209.53 | 359,336 | −7.7% | Sep 25, 2026 |
| Open-market sale 10b5-1 box checked | 21,022 | $208.41 | 338,314 | −5.9% | Sep 25, 2026 |
| Open-market sale 10b5-1 box checked | 6,869 | $207.54 | 331,445 | −2.0% | Sep 25, 2026 |
| Open-market sale 10b5-1 box checked | 13,776 | $206.63 | 317,669 | −4.2% | Sep 25, 2026 |
| Open-market sale 10b5-1 box checked | 5,900 | $205.30 | 311,769 | −1.9% | Sep 25, 2026 |
| Open-market sale 10b5-1 box checked | 2,200 | $204.50 | 309,569 | −0.7% | Sep 25, 2026 |
| Option exercise Stock Option | 116,875 | — | — | — | Sep 25, 2026 |
| Option exercise Stock Option | 3,125 | — | — | — | Sep 25, 2026 |
| Option exercise Class B Common Stock | 120,000 | — | — | — | Sep 25, 2026 |
| Conversion of derivative Class B Common Stock | 120,000 | — | — | — | Sep 25, 2026 |
| Transaction | Shares | Price | Held after | Change† | Date |
|---|---|---|---|---|---|
| Other acquisition / disposition | 25,757 | — | 351,927 | +7.9% | Sep 23, 2026 |
| Other acquisition / disposition | 451,118 | — | 6,490,711 (indirect) | −6.5% | Sep 23, 2026 |
| Other acquisition / disposition | 23,735 | — | 309,603 (indirect) | +8.3% | Sep 23, 2026 |
| Transaction | Shares | Price | Held after | Change† | Date |
|---|---|---|---|---|---|
| Other acquisition / disposition | 120 | — | 926 (indirect) | +15% | Sep 21, 2026 |
| Transaction | Shares | Price | Held after | Change† | Date |
|---|---|---|---|---|---|
| Other acquisition / disposition | 44,507 | — | 275,854 (indirect) | +19% | Sep 21, 2026 |
| Transaction | Shares | Price | Held after | Change† | Date |
|---|---|---|---|---|---|
| Other acquisition / disposition | 23,734 | — | 278,775 (indirect) | +9.3% | Sep 15, 2026 |
| Other acquisition / disposition | 451,115 | — | 6,941,829 (indirect) | −6.1% | Sep 15, 2026 |
| Other acquisition / disposition | 24,463 | — | 315,124 | +8.4% | Sep 15, 2026 |
| Transaction | Shares | Price | Held after | Change† | Date |
|---|---|---|---|---|---|
| Other acquisition / disposition | 44,507 | — | 231,347 (indirect) | +24% | Sep 8, 2026 |
| Transaction | Shares | Price | Held after | Change† | Date |
|---|---|---|---|---|---|
| Other acquisition / disposition | 120 | — | 806 (indirect) | +17% | Sep 8, 2026 |
| Option exercise Class B Common Stock | 37,441 | — | — | — | Sep 4, 2026 |
| Conversion of derivative Class B Common Stock | 37,441 | — | — | — | Sep 4, 2026 |
| Open-market sale 10b5-1 box not checked | 6,721 | $209.99 | 39,766 | −14% | Sep 4, 2026 |
| Open-market sale 10b5-1 box not checked | 300 | $200.79 | 52,894 | −0.6% | Sep 4, 2026 |
| Open-market sale 10b5-1 box not checked | 300 | $201.75 | 52,594 | −0.6% | Sep 4, 2026 |
| Open-market sale 10b5-1 box not checked | 900 | $202.97 | 51,694 | −1.7% | Sep 4, 2026 |
| Open-market sale 10b5-1 box not checked | 1,200 | $204.06 | 50,494 | −2.3% | Sep 4, 2026 |
| Open-market sale 10b5-1 box not checked | 800 | $206.30 | 49,694 | −1.6% | Sep 4, 2026 |
| Open-market sale 10b5-1 box not checked | 1,500 | $207.80 | 48,194 | −3.0% | Sep 4, 2026 |
| Open-market sale 10b5-1 box not checked | 1,707 | $208.84 | 46,487 | −3.5% | Sep 4, 2026 |
| Open-market sale 10b5-1 box not checked | 1,400 | $214.98 | 17,553 | −7.4% | Sep 4, 2026 |
| Conversion of derivative | 37,441 | — | 54,294 | +222% | Sep 4, 2026 |
| Open-market sale 10b5-1 box not checked | 1,100 | $199.18 | 53,194 | −2.0% | Sep 4, 2026 |
| Option exercise Stock Option | 37,441 | — | — | — | Sep 4, 2026 |
| Open-market sale 10b5-1 box not checked | 100 | $216.62 | 16,853 | −0.6% | Sep 4, 2026 |
| Open-market sale 10b5-1 box not checked | 600 | $215.81 | 16,953 | −3.4% | Sep 4, 2026 |
| Open-market sale 10b5-1 box not checked | 3,897 | $213.95 | 18,953 | −17% | Sep 4, 2026 |
| Open-market sale 10b5-1 box not checked | 3,324 | $213.04 | 22,850 | −13% | Sep 4, 2026 |
| Open-market sale 10b5-1 box not checked | 7,439 | $211.85 | 26,174 | −22% | Sep 4, 2026 |
| Open-market sale 10b5-1 box not checked | 6,153 | $210.91 | 33,613 | −15% | Sep 4, 2026 |
| Transaction | Shares | Price | Held after | Change† | Date |
|---|---|---|---|---|---|
| Open-market sale 10b5-1 box not checked | 21,117 | $209.81 | 200,860 (indirect) | −9.5% | Sep 4, 2026 |
| Open-market sale 10b5-1 box not checked | 21,773 | $210.37 | 179,087 (indirect) | −11% | Sep 4, 2026 |
| Open-market sale 10b5-1 box not checked | 7,110 | $211.56 | 171,977 (indirect) | −4.0% | Sep 4, 2026 |
| Transaction | Shares | Price | Held after | Change† | Date |
|---|---|---|---|---|---|
| Conversion of derivative | 46,141 | — | 415,067 | +13% | Sep 4, 2026 |
| Gift | 16,038 | — | 399,029 | −3.9% | Sep 4, 2026 |
| Open-market sale 10b5-1 box not checked | 53,460 | $210.16 | 345,569 | −13% | Sep 4, 2026 |
| Option exercise Stock Option | 46,141 | — | — | — | Sep 4, 2026 |
| Option exercise Class B Common Stock | 46,141 | — | — | — | Sep 4, 2026 |
| Conversion of derivative Class B Common Stock | 46,141 | — | — | — | Sep 4, 2026 |
| Transaction | Shares | Price | Held after | Change† | Date |
|---|---|---|---|---|---|
| Other acquisition / disposition | 47,470 | — | 255,041 (indirect) | +23% | Sep 2, 2026 |
| Other acquisition / disposition | 902,236 | — | 7,392,944 (indirect) | −11% | Sep 2, 2026 |
| Other acquisition / disposition | 46,455 | — | 290,661 | +19% | Sep 2, 2026 |
| Transaction | Shares | Price | Held after | Change† | Date |
|---|---|---|---|---|---|
| Other acquisition / disposition | 44,507 | — | — | — | Aug 24, 2026 |
| Transaction | Shares | Price | Held after | Change† | Date |
|---|---|---|---|---|---|
| Conversion of derivative | 963,818 | — | — | — | Aug 24, 2026 |
| Other acquisition / disposition | 963,818 | — | — | — | Aug 24, 2026 |
| Transaction | Shares | Price | Held after | Change† | Date |
|---|---|---|---|---|---|
| Other acquisition / disposition | 120 | — | — | — | Aug 24, 2026 |
| Open-market sale | 66,237 | $199.33 | — | — | Aug 21, 2026 |
| Open-market sale | 33,575 | $200.13 | — | — | Aug 21, 2026 |
| Open-market sale | 8,832 | $201.12 | — | — | Aug 21, 2026 |
| Open-market sale | 6,699 | $202.28 | — | — | Aug 21, 2026 |
| Open-market sale | 12,092 | $203.37 | — | — | Aug 21, 2026 |
| Open-market sale | 4,800 | $204.44 | — | — | Aug 21, 2026 |
| Open-market sale | 1,600 | $205.32 | — | — | Aug 21, 2026 |
| Open-market sale | 1,400 | $207.28 | — | — | Aug 21, 2026 |
| Open-market sale | 4,594 | $208.86 | — | — | Aug 21, 2026 |
| Open-market sale | 6 | $210.21 | — | — | Aug 21, 2026 |
| Open-market sale | 32,864 | $198.18 | — | — | Aug 21, 2026 |
| Gift | 50,000 | — | — | — | Aug 21, 2026 |
| Conversion of derivative | 237,559 | — | — | — | Aug 21, 2026 |
| Open-market sale | 43,553 | $196.20 | — | — | Aug 21, 2026 |
| Open-market sale | 21,307 | $197.45 | — | — | Aug 21, 2026 |
| Transaction | Shares | Price | Held after | Change† | Date |
|---|---|---|---|---|---|
| Other acquisition / disposition | 34,548 | — | — | — | Aug 21, 2026 |
| Other acquisition / disposition | 67,168 | — | — | — | Aug 21, 2026 |
| Other acquisition / disposition | 18,155 | — | — | — | Aug 21, 2026 |
| Other acquisition / disposition | 18,155 | — | — | — | Aug 21, 2026 |
| Other acquisition / disposition | 287,932 | — | — | — | Aug 21, 2026 |
| Other acquisition / disposition | 287,932 | — | — | — | Aug 21, 2026 |
| Other acquisition / disposition | 87,313 | — | — | — | Aug 21, 2026 |
| Other acquisition / disposition | 23,970 | — | — | — | Aug 21, 2026 |
| Other acquisition / disposition | 1,112,904 | — | — | — | Aug 21, 2026 |
| Conversion of derivative | 87,313 | — | — | — | Aug 21, 2026 |
| Conversion of derivative | 23,970 | — | — | — | Aug 21, 2026 |
| Conversion of derivative | 1,112,904 | — | — | — | Aug 21, 2026 |
| Transaction | Shares | Price | Held after | Change† | Date |
|---|---|---|---|---|---|
| Other acquisition / disposition | 18,155 | — | — | — | Aug 21, 2026 |
| Other acquisition / disposition | 1,112,904 | — | — | — | Aug 21, 2026 |
| Conversion of derivative | 1,112,904 | — | — | — | Aug 21, 2026 |
| Conversion of derivative | 23,970 | — | — | — | Aug 21, 2026 |
| Conversion of derivative | 87,313 | — | — | — | Aug 21, 2026 |
| Other acquisition / disposition | 18,155 | — | — | — | Aug 21, 2026 |
| Other acquisition / disposition | 287,932 | — | — | — | Aug 21, 2026 |
| Other acquisition / disposition | 287,932 | — | — | — | Aug 21, 2026 |
| Other acquisition / disposition | 87,313 | — | — | — | Aug 21, 2026 |
| Other acquisition / disposition | 23,970 | — | — | — | Aug 21, 2026 |
| Transaction | Shares | Price | Held after | Change† | Date |
|---|---|---|---|---|---|
| Open-market sale | 16,293 | $210.01 | — | — | Aug 21, 2026 |
| Conversion of derivative | 16,293 | — | — | — | Aug 21, 2026 |
| Open-market sale | 93,017 | $206.67 | — | — | Aug 20, 2026 |
| Open-market sale | 108,507 | $207.68 | — | — | Aug 20, 2026 |
| Open-market sale | 119,311 | $208.69 | — | — | Aug 20, 2026 |
| Conversion of derivative | 696,798 | — | — | — | Aug 20, 2026 |
| Gift | 213,074 | — | — | — | Aug 20, 2026 |
| Open-market sale | 114,976 | $209.86 | — | — | Aug 20, 2026 |
| Open-market sale | 46,214 | $210.56 | — | — | Aug 20, 2026 |
| Open-market sale | 10,715 | $211.42 | — | — | Aug 20, 2026 |
| Open-market sale | 24,652 | $212.64 | — | — | Aug 20, 2026 |
| Open-market sale | 47,766 | $204.87 | — | — | Aug 20, 2026 |
| Open-market sale | 133,383 | $205.67 | — | — | Aug 20, 2026 |
| Open-market sale | 11,706 | $203.78 | — | — | Aug 20, 2026 |
| Transaction | Shares | Price | Held after | Change† | Date |
|---|---|---|---|---|---|
| Other acquisition / disposition | 902,235 | — | — | — | Aug 19, 2026 |
| Other acquisition / disposition | 46,780 | — | — | — | Aug 19, 2026 |
| Other acquisition / disposition | 46,422 | — | — | — | Aug 19, 2026 |
| Transaction | Shares | Price | Held after | Change† | Date |
|---|---|---|---|---|---|
| Conversion of derivative | 32,500 | — | — | — | Aug 18, 2026 |
| Transaction | Shares | Price | Held after | Change† | Date |
|---|---|---|---|---|---|
| Open-market sale | 98 | $226.46 | — | — | Aug 18, 2026 |
| Conversion of derivative | 6,250 | — | — | — | Aug 18, 2026 |
| Open-market sale | 228 | $215.67 | — | — | Aug 18, 2026 |
| Open-market sale | 389 | $216.40 | — | — | Aug 18, 2026 |
| Open-market sale | 289 | $217.58 | — | — | Aug 18, 2026 |
| Open-market sale | 359 | $218.54 | — | — | Aug 18, 2026 |
| Open-market sale | 408 | $219.58 | — | — | Aug 18, 2026 |
| Open-market sale | 801 | $220.43 | — | — | Aug 18, 2026 |
| Open-market sale | 734 | $221.47 | — | — | Aug 18, 2026 |
| Open-market sale | 344 | $222.42 | — | — | Aug 18, 2026 |
| Open-market sale | 106 | $223.54 | — | — | Aug 18, 2026 |
| Open-market sale | 43 | $224.52 | — | — | Aug 18, 2026 |
| Open-market sale | 72 | $225.51 | — | — | Aug 18, 2026 |
| Open-market sale | 75 | $227.37 | — | — | Aug 18, 2026 |
| Open-market sale | 20 | $228.53 | — | — | Aug 18, 2026 |
| Open-market sale | 32 | $229.46 | — | — | Aug 18, 2026 |
| Open-market sale | 10 | $230.67 | — | — | Aug 18, 2026 |
| Open-market sale | 52 | $231.57 | — | — | Aug 18, 2026 |
| Open-market sale | 60 | $232.62 | — | — | Aug 18, 2026 |
| Open-market sale | 48 | $233.31 | — | — | Aug 18, 2026 |
| Open-market sale | 127 | $234.47 | — | — | Aug 18, 2026 |
| Open-market sale | 65 | $235.50 | — | — | Aug 18, 2026 |
| Open-market sale | 44 | $236.43 | — | — | Aug 18, 2026 |
| Open-market sale | 2 | $237.23 | — | — | Aug 18, 2026 |
| Open-market sale | 2 | $238.78 | — | — | Aug 18, 2026 |
| Open-market sale | 166 | $240.01 | — | — | Aug 18, 2026 |
Listing the 25 most recent of 32 Form 4 filings held for CBRS; the 7 older filings (filed Aug 19 – Aug 20, 2026) are counted above but not listed here — see CBRS's full Form 4 filing history on SEC EDGAR.
Insider filings reported around the same time
Other companies whose most recent Form 4 was filed closest to CBRS's (Oct 7, 2026).
Frequently asked about CBRS insider activity
How many insiders bought CBRS stock in the last 90 days?
No open-market purchases (Form 4 code P) of CBRS shares were reported by Cerebras Systems Inc insiders in the trailing 90 days. The 32 filings shown on this page cover other transaction types — sales, grants, option exercises, and tax withholding.
Who filed the most recent Form 4 for CBRS?
The most recent Form 4 on this page was filed by Eric Vishria (Director) on Oct 7, 2026, reporting 1 transaction. The original document is linked from the filing list above on SEC EDGAR. Amended filings (Form 4/A) may later revise reported figures.
What was the largest open-market CBRS insider sale shown?
The largest open-market sale among the filings shown was 133,383 CBRS shares at $205.67 (about $27,432,882) by Sean Lie (Chief Technology Officer) on Aug 20, 2026. Value is shares × the price reported on the Form 4; trades may be made under a prearranged Rule 10b5-1 plan.
New to Form 4s? The transaction codes, the 90-day window and the 0–100 score are defined on the insider-activity score methodology page.
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Track CBRS insider filings free →This score summarizes SEC Form 4 filing activity over the trailing 90 days. It is descriptive, not predictive — not a rating, recommendation, or investment advice. Data: SEC EDGAR (public domain), as filed; amendments may revise figures. Tradune is not a registered investment adviser.
Data as filed; amended filings (Form 4/A) may revise figures. Sales may occur under prearranged Rule 10b5-1 trading plans.