CBRS insider transaction filings
Cerebras Systems Inc. — 50 most recent Form 4 filings from SEC EDGAR, normalized by FilingPulse. Latest filing: 2026-09-17. Screen CBRS transaction legs live →
Insider transaction summary — last 90 days
2026-06-24 to 2026-09-22, from the filings listed below: 38 Form 4 filings. Counts and totals are arithmetic on values as filed — descriptive data, not a recommendation.
- Open-market purchases (code P, non-derivative): none reported.
- Open-market sales (code S, non-derivative): 288 legs across 18 filings by 6 insiders — 1,432,179 shares, $295,594,142 total (shares × price as filed).
- Other reported legs (grants, option exercises, tax withholding, gifts, derivative-security transactions, …): 176.
- Largest priced transaction: sale of 133,383 shares @ $205.67 ($27,432,882) by Lie Sean, filed 2026-08-21.
By insider — same window
Open-market purchase/sale legs on non-derivative securities, grouped by the filing's reporting owner(s); joint filings appear once. Dollar totals cover priced legs only (shares × price as filed). Ordered by priced transaction value, largest first.
+2 more insiders in the window, not shown — every filing appears in the table below.
Recent Form 4 filings — Cerebras Systems Inc.
| Filed | Form | Insider | Reported transactions | Source |
|---|---|---|---|---|
| 2026-09-17 | 4 | Susan Lior — Director | Other (J): 451,115 · Other (J): 24,463 · Other (J): 23,734 | EDGAR |
| 2026-09-10 | 4 | Vishria Eric — Director | Other (J): 44,507 @ $0 | EDGAR |
| 2026-09-08 | 4 | Vassallo Steven — Director | Sale (S): 21,117 @ $209.81 · Sale (S): 21,773 @ $210.37 · Sale (S): 7,110 @ $211.56 | EDGAR |
| 2026-09-08 | 4 | Feldman Andrew D. — CEO, President, Director | Conversion (C): 37,441 @ $0 · Sale (S): 1,100 @ $199.18 · Sale (S): 300 @ $200.79 · Sale (S): 300 @ $201.75 · Sale (S): 900 @ $202.97 · Sale (S): 1,200 @ $204.06 · +15 more | EDGAR |
| 2026-09-08 | 4 | Lie Sean — Chief Technology Officer | Conversion (C): 46,141 · Gift (G): 16,038 @ $0 · Sale (S): 53,460 @ $210.16 · Option exercise (M): 46,141 (derivative) @ $0 · Option exercise (M): 46,141 (derivative) @ $0 · Conversion (C): 46,141 (derivative) @ $0 | EDGAR |
| 2026-09-04 | 4 | Susan Lior — Director | Other (J): 902,236 · Other (J): 46,455 · Other (J): 47,470 | EDGAR |
| 2026-08-26 | 4 | Benchmark AI Infrastructure Management Co., L.L.C. — 10% owner Benchmark AI Infrastructure Fund, L.P. — 10% owner Benchmark AI Infrastructure Fund B, L.P. — 10% owner | Holdings only — no transactions reported | EDGAR |
| 2026-08-26 | 4 | Vishria Eric — Director | Other (J): 44,507 @ $0 | EDGAR |
| 2026-08-26 | 4 | Benchmark Capital Management Co. VIII, L.L.C. — 10% owner Benchmark Capital Partners VIII, L.P. — 10% owner Benchmark Founders' Fund VIII, L.P. — 10% owner Benchmark Founders' Fund VIII-B, L.P. — 10% owner Benchmark Capital Management Co. IX, L.L.C. — 10% owner Benchmark Capital Partners IX, L.P. — 10% owner Benchmark Founders' Fund IX, L.P. — 10% owner Benchmark Founders' Fund IX-A, L.P. — 10% owner Benchmark Founders' Fund IX-B, L.P. — 10% owner | Conversion (C): 963,818 @ $0 · Other (J): 963,818 @ $0 · Conversion (C): 963,818 (derivative) @ $0 | EDGAR |
| 2026-08-25 | 4 | Foundation Capital Management Co. VIII, L.L.C. — 10% owner Foundation Capital VIII, L.P. — 10% owner Foundation Capital VIII Principals Fund, L.L.C. — 10% owner Foundation Capital Management Co. LF II, L.L.C. — 10% owner Foundation Capital Leadership Fund II, L.P. — 10% owner | Conversion (C): 1,112,904 · Conversion (C): 23,970 · Conversion (C): 87,313 · Other (J): 1,112,904 @ $0 · Other (J): 23,970 @ $0 · Other (J): 87,313 @ $0 · +7 more | EDGAR |
| 2026-08-25 | 4 | Vassallo Steven — Director | Conversion (C): 1,112,904 · Conversion (C): 23,970 · Conversion (C): 87,313 · Other (J): 1,112,904 @ $0 · Other (J): 23,970 @ $0 · Other (J): 87,313 @ $0 · +9 more | EDGAR |
| 2026-08-25 | 4 | Feldman Andrew D. — CEO, President, Director | Gift (G): 50,000 · Conversion (C): 237,559 @ $0 · Sale (S): 43,553 @ $196.20 · Sale (S): 21,307 @ $197.45 · Sale (S): 32,864 @ $198.18 · Sale (S): 66,237 @ $199.33 · +15 more | EDGAR |
| 2026-08-21 | 4 | Lie Sean — Chief Technology Officer | Conversion (C): 696,798 · Gift (G): 213,074 @ $0 · Sale (S): 11,706 @ $203.78 · Sale (S): 47,766 @ $204.87 · Sale (S): 133,383 @ $205.67 · Sale (S): 93,017 @ $206.67 · +18 more | EDGAR |
| 2026-08-21 | 4 | Susan Lior — Director | Other (J): 902,235 · Other (J): 46,422 · Other (J): 46,780 | EDGAR |
| 2026-08-20 | 4 | Vassallo Steven — Director | Conversion (C): 1,738,913 · Conversion (C): 37,453 · Conversion (C): 136,426 · Other (J): 1,738,913 @ $0 · Other (J): 37,453 @ $0 · Other (J): 136,426 @ $0 · +9 more | EDGAR |
| 2026-08-20 | 4 | Foundation Capital Management Co. VIII, L.L.C. — 10% owner Foundation Capital VIII, L.P. — 10% owner Foundation Capital VIII Principals Fund, L.L.C. — 10% owner Foundation Capital Management Co. LF II, L.L.C. — 10% owner Foundation Capital Leadership Fund II, L.P. — 10% owner | Conversion (C): 1,738,913 · Conversion (C): 37,453 · Conversion (C): 136,426 · Other (J): 1,738,913 @ $0 · Other (J): 37,453 @ $0 · Other (J): 136,426 @ $0 · +7 more | EDGAR |
| 2026-08-20 | 4 | Komin Robert Patrick Jr. — Chief Financial Officer | Conversion (C): 32,500 @ $0 · Conversion (C): 32,500 (derivative) | EDGAR |
| 2026-08-20 | 4 | Patel Yagnesh — Chief Accounting Officer | Conversion (C): 6,250 · Sale (S): 228 @ $215.67 · Sale (S): 389 @ $216.40 · Sale (S): 289 @ $217.58 · Sale (S): 359 @ $218.54 · Sale (S): 408 @ $219.58 · +21 more | EDGAR |
| 2026-08-20 | 4 | Lie Sean — Chief Technology Officer | Conversion (C): 616,706 · Sale (S): 1 @ $214.85 · Sale (S): 1,059 @ $215.67 · Sale (S): 1,807 @ $216.40 · Sale (S): 1,344 @ $217.58 · Sale (S): 1,670 @ $218.54 · +22 more | EDGAR |
| 2026-08-20 | 4 | Mallick Dhiraj — Chief Operating Officer | Conversion (C): 158,889 · Sale (S): 2 @ $214.85 · Sale (S): 1,937 @ $215.67 · Sale (S): 3,305 @ $216.40 · Sale (S): 2,458 @ $217.58 · Sale (S): 3,055 @ $218.54 · +22 more | EDGAR |
| 2026-08-19 | 4 | Feldman Andrew D. — CEO, President, Director | Other (J): 298 @ $0 · Conversion (C): 93,497 · Sale (S): 2 @ $214.85 · Sale (S): 1,327 @ $215.67 · Sale (S): 2,264 @ $216.40 · Sale (S): 1,684 @ $217.58 · +23 more | EDGAR |
| 2026-08-19 | 4 | Benchmark Capital Management Co. VIII, L.L.C. — 10% owner Benchmark Capital Partners VIII, L.P. — 10% owner Benchmark Founders' Fund VIII, L.P. — 10% owner Benchmark Founders' Fund VIII-B, L.P. — 10% owner Benchmark Capital Management Co. IX, L.L.C. — 10% owner Benchmark Capital Partners IX, L.P. — 10% owner Benchmark Founders' Fund IX, L.P. — 10% owner Benchmark Founders' Fund IX-A, L.P. — 10% owner Benchmark Founders' Fund IX-B, L.P. — 10% owner | Conversion (C): 2,402,352 @ $0 · Other (J): 2,402,352 @ $0 · Conversion (C): 2,402,352 (derivative) @ $0 | EDGAR |
| 2026-08-19 | 4 | Benchmark AI Infrastructure Management Co., L.L.C. — 10% owner Benchmark AI Infrastructure Fund, L.P. — 10% owner Benchmark AI Infrastructure Fund B, L.P. — 10% owner | Holdings only — no transactions reported | EDGAR |
| 2026-08-19 | 4 | Vishria Eric — Director | Sale (S): 10,000 @ $224.20 · Sale (S): 300 @ $227.97 · Sale (S): 41,367 @ $228.34 · Sale (S): 9,276 @ $229.56 · Sale (S): 1,639 @ $230.10 · Sale (S): 5,686 @ $250.30 · +1 more | EDGAR |
| 2026-08-18 | 4 | Vassallo Steven — Director | Conversion (C): 1,391,131 · Conversion (C): 29,963 · Conversion (C): 109,141 · Conversion (C): 347,782 · Conversion (C): 7,490 · Conversion (C): 27,285 · +19 more | EDGAR |
| 2026-08-18 | 4 | Foundation Capital Management Co. VIII, L.L.C. — 10% owner Foundation Capital VIII, L.P. — 10% owner Foundation Capital VIII Principals Fund, L.L.C. — 10% owner Foundation Capital Management Co. LF II, L.L.C. — 10% owner Foundation Capital Leadership Fund II, L.P. — 10% owner | Conversion (C): 1,391,131 · Conversion (C): 29,963 · Conversion (C): 109,141 · Conversion (C): 347,782 · Conversion (C): 7,490 · Conversion (C): 27,285 · +12 more | EDGAR |
| 2026-08-18 | 4 | Susan Lior — Director | Other (J): 2,248,855 · Other (J): 104,811 · Other (J): 119,816 | EDGAR |
| 2026-07-01 | 4 | Feldman Andrew D. — CEO, President, Director | Other (J): 268 @ $0 | EDGAR |
| 2026-07-01 | 4 | Mallick Dhiraj — Chief Operating Officer | Conversion (C): 10,000 · Sale (S): 10,000 @ $206.51 · Conversion (C): 10,000 (derivative) @ $0 | EDGAR |
| 2026-07-01 | 4 | Vishria Eric — Director | Other (J): 99,651 @ $0 | EDGAR |
| 2026-07-01 | 4 | Benchmark Capital Management Co. VIII, L.L.C. — 10% owner Benchmark Capital Partners VIII, L.P. — 10% owner Benchmark Founders' Fund VIII, L.P. — 10% owner Benchmark Founders' Fund VIII-B, L.P. — 10% owner | Conversion (C): 2,157,802 @ $0 · Other (J): 2,157,802 @ $0 · Conversion (C): 2,157,802 (derivative) @ $0 | EDGAR |
| 2026-06-29 | 4 | Mallick Dhiraj — Chief Operating Officer | Sale (S): 184 @ $175.61 · Sale (S): 230 @ $178.92 · Sale (S): 606 @ $180.19 · Sale (S): 330 @ $181.17 · Sale (S): 138 @ $182.50 · Sale (S): 1,074 @ $184.30 · +22 more | EDGAR |
| 2026-06-29 | 4 | Mallick Dhiraj — Chief Operating Officer | Conversion (C): 69,445 · Sale (S): 324 @ $162.24 · Sale (S): 810 @ $163.62 · Sale (S): 998 @ $164.73 · Sale (S): 837 @ $166.04 · Sale (S): 1,461 @ $166.98 · +25 more | EDGAR |
| 2026-06-29 | 4 | Feldman Andrew D. — CEO, President, Director | Conversion (C): 17,990 · Sale (S): 4,028 @ $169.07 · Sale (S): 8,602 @ $170.58 · Sale (S): 700 @ $171.53 · Sale (S): 160 @ $172.03 · Sale (S): 400 @ $173.50 · +8 more | EDGAR |
| 2026-06-29 | 4 | Lie Sean — Chief Technology Officer | Conversion (C): 10,033 · Sale (S): 2,534 @ $165.21 · Sale (S): 3,353 @ $165.43 · Sale (S): 922 @ $168.80 · Sale (S): 400 @ $169.62 · Sale (S): 110 @ $170.57 · +12 more | EDGAR |
| 2026-06-29 | 4 | Patel Yagnesh — Chief Accounting Officer | Sale (S): 46 @ $189.36 · Sale (S): 100 @ $161.61 · Sale (S): 300 @ $163.29 · Sale (S): 100 @ $164.79 · Sale (S): 200 @ $166.66 · Sale (S): 200 @ $168.45 · +10 more | EDGAR |
| 2026-06-29 | 4 | Patel Yagnesh — Chief Accounting Officer | Conversion (C): 10,079 · Sale (S): 107 @ $162.71 · Sale (S): 215 @ $164.19 · Sale (S): 161 @ $166.01 · Sale (S): 228 @ $166.98 · Sale (S): 269 @ $169.11 · +25 more | EDGAR |
| 2026-06-26 | 4 | Susan Lior — Director | Other (J): 2,019,927 · Other (J): 92,973 · Other (J): 40,975 | EDGAR |
| 2026-06-12 | 4 | Susan Lior — Director | Conversion (C): 13,466,197 · Conversion (C): 13,466,197 (derivative) | EDGAR |
| 2026-05-19 | 4 | Benchmark AI Infrastructure Management Co., L.L.C. — 10% owner Benchmark AI Infrastructure Fund, L.P. — 10% owner Benchmark AI Infrastructure Fund B, L.P. — 10% owner | Conversion (C): 2,527,646 (derivative) @ $0 · Conversion (C): 2,527,646 (derivative) @ $0 | EDGAR |
| 2026-05-19 | 4 | Foundation Capital Management Co. VIII, L.L.C. — 10% owner Foundation Capital VIII, L.P. — 10% owner Foundation Capital VIII Principals Fund, L.L.C. — 10% owner Foundation Capital Management Co. LF II, L.L.C. — 10% owner Foundation Capital Leadership Fund II, L.P. — 10% owner | Conversion (C): 12,322,821 (derivative) · Conversion (C): 265,414 (derivative) · Conversion (C): 1,395,341 (derivative) · Conversion (C): 30,053 (derivative) · Conversion (C): 109,409 (derivative) · Conversion (C): 2,356 (derivative) · +8 more | EDGAR |
| 2026-05-19 | 4 | Benchmark Capital Management Co. VIII, L.L.C. — 10% owner Benchmark Capital Partners VIII, L.P. — 10% owner Benchmark Founders' Fund VIII, L.P. — 10% owner Benchmark Founders' Fund VIII-B, L.P. — 10% owner Benchmark Capital Management Co. IX, L.L.C. — 10% owner Benchmark Capital Partners IX, L.P. — 10% owner Benchmark Founders' Fund IX, L.P. — 10% owner Benchmark Founders' Fund IX-A, L.P. — 10% owner Benchmark Founders' Fund IX-B, L.P. — 10% owner | Conversion (C): 12,588,235 (derivative) @ $0 · Conversion (C): 1,425,394 (derivative) @ $0 · Conversion (C): 335,293 (derivative) @ $0 · Conversion (C): 30,968 (derivative) @ $0 · Conversion (C): 5,457 (derivative) @ $0 · Conversion (C): 689,990 (derivative) @ $0 · +2 more | EDGAR |
| 2026-05-15 | 4 | Lie Sean — Chief Technology Officer, 10% owner | Tax withholding (F): 96,127 @ $185 · Other (J): 8,209,731 · Other (J): 180,600 · Other (J): 8,209,731 (derivative) · Other (J): 180,600 (derivative) · Other (J): 350,000 (derivative) · +9 more | EDGAR |
| 2026-05-15 | 4 | Feldman Andrew D. — CEO, President, Director, 10% owner | Tax withholding (F): 107,076 @ $185 · Other (J): 14,056,621 · Other (J): 50,000 · Other (J): 50,000 · Other (J): 14,056,621 (derivative) · Other (J): 50,000 (derivative) · +11 more | EDGAR |
| 2026-05-15 | 4 | Susan Lior — Director, 10% owner | Other (J): 1,093,998 · Other (J): 1,093,998 (derivative) · Conversion (C): 4,419,405 (derivative) · Conversion (C): 599,465 (derivative) · Conversion (C): 486,175 (derivative) · Conversion (C): 309,678 (derivative) · +3 more | EDGAR |
| 2026-05-15 | 4 | Patel Yagnesh — Chief Accounting Officer | Tax withholding (F): 19,083 @ $185 · Other (J): 130,917 · Other (J): 130,917 (derivative) | EDGAR |
| 2026-05-15 | 4 | Komin Robert Patrick Jr. — Chief Financial Officer | Other (J): 854,153 · Other (J): 175,000 · Other (J): 854,153 (derivative) · Other (J): 175,000 (derivative) · Other (J): 18,248 (derivative) · Other (J): 18,248 (derivative) | EDGAR |
| 2026-05-15 | 4 | Vassallo Steven — Director | Conversion (C): 12,588,235 (derivative) · Conversion (C): 1,425,394 (derivative) · Conversion (C): 111,765 (derivative) · Conversion (C): 30,968 (derivative) · Conversion (C): 1,145,981 (derivative) · Conversion (C): 15,302,343 (derivative) | EDGAR |
| 2026-05-15 | 4 | Auvil Paul R. III — Director | Other (J): 203,750 · Other (J): 203,750 (derivative) | EDGAR |
| 2026-05-15 | 4 | DONIO ELENA A. — Director | Other (J): 33,701 · Other (J): 33,701 (derivative) | EDGAR |
Recent 8-K events — Cerebras Systems Inc.
| Filed | Form | Items reported | Source |
|---|---|---|---|
| 2026-08-12 | 8-K | 2.02 — Results of Operations and Financial Condition 9.01 — Financial Statements and Exhibits | EDGAR |
| 2026-06-23 | 8-K | 2.02 — Results of Operations and Financial Condition 9.01 — Financial Statements and Exhibits | EDGAR |
| 2026-05-15 | 8-K | 5.03 — Amendments to Articles of Incorporation or Bylaws; Change in Fiscal Year 8.01 — Other Events 9.01 — Financial Statements and Exhibits | EDGAR |
Need this as JSON?
GET https://api.filingpulse.io/v1/insider-trades?ticker=CBRS returns every filing on this page — normalized, with footnotes and derivative legs — and webhooks push new ones to you in seconds. API docs →