Insider trading · Q3 2026 · CIK 2021728

Cerebras Systems Inc. (CBRS) insider trading.

Name: Cerebras Systems Inc. insider transactions, Q3 2026
Creator: U.S. Securities and Exchange Commission

In Q3 2026, insiders at Cerebras Systems Inc. reported 322 non-derivative transactions on 38 Forms 3, 4 and 5: 0 open-market purchases and 204 sales worth $389.7M.

Transactions: 322
Purchases (P): 0
Sales (S): 204
Net shares, P minus S: -1,874,452
Insiders: 14
Last filed: 2026-09-30

Insiders

Insider	Relationship	Transactions	Sales
Feldman Andrew D.	Director, Officer · CEO, President	64	55
Lie Sean	Officer · Chief Technology Officer	55	47
Mallick Dhiraj	Officer · Chief Operating Officer	49	46
Vassallo Steven	Director	46	8
Patel Yagnesh	Officer · Chief Accounting Officer	27	26
Komin Robert Patrick Jr.	Officer · Chief Financial Officer	17	16
Susan Lior	Director	15	0
Foundation Capital Management Co. VIII, L.L.C. / Foundation Capital VIII, L.P. / Foundation Capital Management Co. LF II, L.L.C. / Foundation Capital VIII Principals Fund, L.L.C. / Foundation Capital Leadership Fund II, L.P.	TenPercentOwner	12	0
Vishria Eric	Director	11	6
Foundation Capital VIII Principals Fund, L.L.C. / Foundation Capital VIII, L.P. / Foundation Capital Management Co. VIII, L.L.C. / Foundation Capital Leadership Fund II, L.P. / Foundation Capital Management Co. LF II, L.L.C.	TenPercentOwner	10	0
Foundation Capital Management Co. LF II, L.L.C. / Foundation Capital VIII Principals Fund, L.L.C. / Foundation Capital Leadership Fund II, L.P. / Foundation Capital Management Co. VIII, L.L.C. / Foundation Capital VIII, L.P.	TenPercentOwner	10	0
Benchmark Capital Partners IX, L.P. / Benchmark Founders' Fund VIII-B, L.P. / Benchmark Capital Partners VIII, L.P. / Benchmark Founders' Fund VIII, L.P. / Benchmark Capital Management Co. IX, L.L.C. / Benchmark Founders' Fund IX, L.P. / Benchmark Founders' Fund IX-B, L.P. / Benchmark Founders' Fund IX-A, L.P. / Benchmark Capital Management Co. VIII, L.L.C.	TenPercentOwner	2	0
Benchmark Capital Management Co. IX, L.L.C. / Benchmark Capital Partners VIII, L.P. / Benchmark Founders' Fund IX, L.P. / Benchmark Founders' Fund IX-A, L.P. / Benchmark Capital Partners IX, L.P. / Benchmark Founders' Fund VIII, L.P. / Benchmark Capital Management Co. VIII, L.L.C. / Benchmark Founders' Fund IX-B, L.P. / Benchmark Founders' Fund VIII-B, L.P.	TenPercentOwner	2	0
Benchmark Capital Management Co. VIII, L.L.C. / Benchmark Founders' Fund VIII, L.P. / Benchmark Capital Partners VIII, L.P. / Benchmark Founders' Fund VIII-B, L.P.	TenPercentOwner	2	0

Transactions

Newest 150 of 322 non-derivative rows, newest transaction first. Shares and prices as filed.
Date	Insider	Code	Shares	Price	Owned after	Filing
2026-09-29	Mallick Dhiraj	S (D)	68,830	$194.91	0	Form 4
2026-09-29	Mallick Dhiraj	S (D)	6,613	$197.05	87,533	Form 4
2026-09-29	Mallick Dhiraj	S (D)	5,170	$197.85	94,146	Form 4
2026-09-29	Mallick Dhiraj	S (D)	17,000	$198.96	99,316	Form 4
2026-09-29	Mallick Dhiraj	S (D)	17,848	$199.89	116,316	Form 4
2026-09-29	Mallick Dhiraj	S (D)	22,915	$200.96	134,164	Form 4
2026-09-29	Mallick Dhiraj	S (D)	5,637	$201.91	157,079	Form 4
2026-09-29	Mallick Dhiraj	S (D)	9,682	$203.37	162,716	Form 4
2026-09-29	Mallick Dhiraj	S (D)	27,492	$204.17	172,398	Form 4
2026-09-29	Mallick Dhiraj	S (D)	8,729	$205.17	199,890	Form 4
2026-09-29	Mallick Dhiraj	S (D)	9,047	$206.13	208,619	Form 4
2026-09-29	Mallick Dhiraj	S (D)	9,652	$207.06	217,666	Form 4
2026-09-29	Mallick Dhiraj	S (D)	20,714	$208.38	227,318	Form 4
2026-09-29	Mallick Dhiraj	S (D)	41,278	$209.33	248,032	Form 4
2026-09-29	Mallick Dhiraj	S (D)	46,427	$210.27	289,310	Form 4
2026-09-29	Mallick Dhiraj	S (D)	41,391	$211.29	335,737	Form 4
2026-09-29	Mallick Dhiraj	S (D)	18,274	$212.2	377,128	Form 4
2026-09-29	Mallick Dhiraj	S (D)	598	$212.93	395,402	Form 4
2026-09-29	Mallick Dhiraj	C (A)	276,000	$0	396,000	Form 4
2026-09-29	Mallick Dhiraj	S (D)	18,703	$195.56	68,830	Form 4
2026-09-29	Komin Robert Patrick Jr.	S (D)	2,771	$211.03	27,899	Form 4
2026-09-29	Komin Robert Patrick Jr.	S (D)	800	$206.68	21,400	Form 4
2026-09-29	Komin Robert Patrick Jr.	S (D)	600	$205.47	20,800	Form 4
2026-09-29	Komin Robert Patrick Jr.	S (D)	1,600	$204.26	19,200	Form 4
2026-09-29	Komin Robert Patrick Jr.	S (D)	870	$198.7	4,800	Form 4
2026-09-29	Komin Robert Patrick Jr.	S (D)	685	$197.48	4,115	Form 4
2026-09-29	Komin Robert Patrick Jr.	S (D)	1,115	$195.61	3,000	Form 4
2026-09-29	Komin Robert Patrick Jr.	S (D)	3,000	$194.92	0	Form 4
2026-09-29	Komin Robert Patrick Jr.	S (D)	1,830	$211.79	30,670	Form 4
2026-09-29	Komin Robert Patrick Jr.	S (D)	2,802	$210.02	25,097	Form 4
2026-09-29	Komin Robert Patrick Jr.	S (D)	11,200	$201.22	6,800	Form 4
2026-09-29	Komin Robert Patrick Jr.	S (D)	700	$207.83	22,200	Form 4
2026-09-29	Komin Robert Patrick Jr.	S (D)	2,197	$208.98	22,900	Form 4
2026-09-29	Komin Robert Patrick Jr.	S (D)	1,130	$199.8	5,670	Form 4
2026-09-29	Komin Robert Patrick Jr.	S (D)	800	$203.48	18,400	Form 4
2026-09-29	Komin Robert Patrick Jr.	S (D)	400	$201.96	18,000	Form 4
2026-09-28	Patel Yagnesh	S (D)	1,320	$204.5	15,356	Form 4
2026-09-25	Lie Sean	S (D)	9,177	$211.32	419,892	Form 4
2026-09-25	Lie Sean	S (D)	30,565	$210.45	389,327	Form 4
2026-09-25	Lie Sean	S (D)	21,022	$208.41	338,314	Form 4
2026-09-25	Lie Sean	S (D)	6,869	$207.54	331,445	Form 4
2026-09-25	Lie Sean	S (D)	500	$212.14	429,069	Form 4
2026-09-25	Lie Sean	G (D)	36,000	$0	429,569	Form 4
2026-09-25	Lie Sean	C (A)	120,000	—	465,569	Form 4
2026-09-25	Lie Sean	S (D)	2,200	$204.5	309,569	Form 4
2026-09-25	Lie Sean	S (D)	29,991	$209.53	359,336	Form 4
2026-09-25	Lie Sean	S (D)	5,900	$205.3	311,769	Form 4
2026-09-25	Lie Sean	S (D)	13,776	$206.63	317,669	Form 4
2026-09-23	Susan Lior	J (A)	25,757	—	351,927	Form 4
2026-09-23	Susan Lior	J (A)	23,735	—	309,603	Form 4
2026-09-23	Susan Lior	J (D)	451,118	—	6,490,711	Form 4
2026-09-21	Vishria Eric	J (A)	44,507	$0	275,854	Form 4
2026-09-21	Feldman Andrew D.	J (A)	120	$0	926	Form 4
2026-09-15	Susan Lior	J (A)	23,734	—	278,775	Form 4
2026-09-15	Susan Lior	J (D)	451,115	—	6,941,829	Form 4
2026-09-15	Susan Lior	J (A)	24,463	—	315,124	Form 4
2026-09-08	Vishria Eric	J (A)	44,507	$0	231,347	Form 4
2026-09-08	Feldman Andrew D.	J (A)	120	$0	806	Form 4
2026-09-04	Feldman Andrew D.	S (D)	1,707	$208.84	46,487	Form 4
2026-09-04	Feldman Andrew D.	S (D)	1,500	$207.8	48,194	Form 4
2026-09-04	Feldman Andrew D.	S (D)	6,153	$210.91	33,613	Form 4
2026-09-04	Feldman Andrew D.	S (D)	7,439	$211.85	26,174	Form 4
2026-09-04	Feldman Andrew D.	S (D)	3,324	$213.04	22,850	Form 4
2026-09-04	Feldman Andrew D.	S (D)	3,897	$213.95	18,953	Form 4
2026-09-04	Feldman Andrew D.	S (D)	1,400	$214.98	17,553	Form 4
2026-09-04	Feldman Andrew D.	S (D)	600	$215.81	16,953	Form 4
2026-09-04	Feldman Andrew D.	S (D)	100	$216.62	16,853	Form 4
2026-09-04	Feldman Andrew D.	C (A)	37,441	$0	54,294	Form 4
2026-09-04	Feldman Andrew D.	S (D)	1,100	$199.18	53,194	Form 4
2026-09-04	Feldman Andrew D.	S (D)	300	$200.79	52,894	Form 4
2026-09-04	Feldman Andrew D.	S (D)	300	$201.75	52,594	Form 4
2026-09-04	Feldman Andrew D.	S (D)	900	$202.97	51,694	Form 4
2026-09-04	Feldman Andrew D.	S (D)	1,200	$204.06	50,494	Form 4
2026-09-04	Feldman Andrew D.	S (D)	800	$206.3	49,694	Form 4
2026-09-04	Feldman Andrew D.	S (D)	6,721	$209.99	39,766	Form 4
2026-09-04	Lie Sean	C (A)	46,141	—	415,067	Form 4
2026-09-04	Lie Sean	S (D)	53,460	$210.16	345,569	Form 4
2026-09-04	Lie Sean	G (D)	16,038	$0	399,029	Form 4
2026-09-04	Vassallo Steven	S (D)	21,117	$209.81	200,860	Form 4
2026-09-04	Vassallo Steven	S (D)	7,110	$211.56	171,977	Form 4
2026-09-04	Vassallo Steven	S (D)	21,773	$210.37	179,087	Form 4
2026-09-02	Susan Lior	J (D)	902,236	—	7,392,944	Form 4
2026-09-02	Susan Lior	J (A)	46,455	—	290,661	Form 4
2026-09-02	Susan Lior	J (A)	47,470	—	255,041	Form 4
2026-08-24	Benchmark Capital Partners IX, L.P. / Benchmark Founders' Fund VIII-B, L.P. / Benchmark Capital Partners VIII, L.P. / Benchmark Founders' Fund VIII, L.P. / Benchmark Capital Management Co. IX, L.L.C. / Benchmark Founders' Fund IX, L.P. / Benchmark Founders' Fund IX-B, L.P. / Benchmark Founders' Fund IX-A, L.P. / Benchmark Capital Management Co. VIII, L.L.C.	J (D)	963,818	$0	0	Form 4
2026-08-24	Benchmark Capital Partners IX, L.P. / Benchmark Founders' Fund VIII-B, L.P. / Benchmark Capital Partners VIII, L.P. / Benchmark Founders' Fund VIII, L.P. / Benchmark Capital Management Co. IX, L.L.C. / Benchmark Founders' Fund IX, L.P. / Benchmark Founders' Fund IX-B, L.P. / Benchmark Founders' Fund IX-A, L.P. / Benchmark Capital Management Co. VIII, L.L.C.	C (A)	963,818	$0	963,818	Form 4
2026-08-24	Vishria Eric	J (A)	44,507	$0	186,840	Form 4
2026-08-24	Feldman Andrew D.	J (A)	120	$0	686	Form 4
2026-08-21	Foundation Capital VIII Principals Fund, L.L.C. / Foundation Capital VIII, L.P. / Foundation Capital Management Co. VIII, L.L.C. / Foundation Capital Leadership Fund II, L.P. / Foundation Capital Management Co. LF II, L.L.C.	C (A)	1,112,904	—	1,112,904	Form 4
2026-08-21	Foundation Capital VIII Principals Fund, L.L.C. / Foundation Capital VIII, L.P. / Foundation Capital Management Co. VIII, L.L.C. / Foundation Capital Leadership Fund II, L.P. / Foundation Capital Management Co. LF II, L.L.C.	C (A)	23,970	—	23,970	Form 4
2026-08-21	Foundation Capital VIII Principals Fund, L.L.C. / Foundation Capital VIII, L.P. / Foundation Capital Management Co. VIII, L.L.C. / Foundation Capital Leadership Fund II, L.P. / Foundation Capital Management Co. LF II, L.L.C.	C (A)	87,313	—	87,313	Form 4
2026-08-21	Foundation Capital VIII Principals Fund, L.L.C. / Foundation Capital VIII, L.P. / Foundation Capital Management Co. VIII, L.L.C. / Foundation Capital Leadership Fund II, L.P. / Foundation Capital Management Co. LF II, L.L.C.	J (D)	1,112,904	$0	0	Form 4
2026-08-21	Foundation Capital VIII Principals Fund, L.L.C. / Foundation Capital VIII, L.P. / Foundation Capital Management Co. VIII, L.L.C. / Foundation Capital Leadership Fund II, L.P. / Foundation Capital Management Co. LF II, L.L.C.	J (D)	18,155	$0	0	Form 4
2026-08-21	Foundation Capital VIII Principals Fund, L.L.C. / Foundation Capital VIII, L.P. / Foundation Capital Management Co. VIII, L.L.C. / Foundation Capital Leadership Fund II, L.P. / Foundation Capital Management Co. LF II, L.L.C.	J (D)	87,313	$0	0	Form 4
2026-08-21	Foundation Capital VIII Principals Fund, L.L.C. / Foundation Capital VIII, L.P. / Foundation Capital Management Co. VIII, L.L.C. / Foundation Capital Leadership Fund II, L.P. / Foundation Capital Management Co. LF II, L.L.C.	J (A)	287,932	$0	287,932	Form 4
2026-08-21	Foundation Capital VIII Principals Fund, L.L.C. / Foundation Capital VIII, L.P. / Foundation Capital Management Co. VIII, L.L.C. / Foundation Capital Leadership Fund II, L.P. / Foundation Capital Management Co. LF II, L.L.C.	J (D)	287,932	$0	0	Form 4
2026-08-21	Foundation Capital VIII Principals Fund, L.L.C. / Foundation Capital VIII, L.P. / Foundation Capital Management Co. VIII, L.L.C. / Foundation Capital Leadership Fund II, L.P. / Foundation Capital Management Co. LF II, L.L.C.	J (A)	18,155	$0	18,155	Form 4
2026-08-21	Foundation Capital VIII Principals Fund, L.L.C. / Foundation Capital VIII, L.P. / Foundation Capital Management Co. VIII, L.L.C. / Foundation Capital Leadership Fund II, L.P. / Foundation Capital Management Co. LF II, L.L.C.	J (D)	23,970	$0	0	Form 4
2026-08-21	Vassallo Steven	C (A)	1,112,904	—	1,112,904	Form 4
2026-08-21	Vassallo Steven	C (A)	23,970	—	23,970	Form 4
2026-08-21	Vassallo Steven	C (A)	87,313	—	87,313	Form 4
2026-08-21	Vassallo Steven	J (D)	1,112,904	$0	0	Form 4
2026-08-21	Vassallo Steven	J (D)	23,970	$0	0	Form 4
2026-08-21	Vassallo Steven	J (A)	34,548	$0	139,618	Form 4
2026-08-21	Vassallo Steven	J (A)	287,932	$0	287,932	Form 4
2026-08-21	Vassallo Steven	J (D)	287,932	$0	0	Form 4
2026-08-21	Vassallo Steven	J (A)	18,155	$0	18,155	Form 4
2026-08-21	Vassallo Steven	J (D)	18,155	$0	0	Form 4
2026-08-21	Vassallo Steven	J (A)	67,168	$0	221,977	Form 4
2026-08-21	Vassallo Steven	J (D)	87,313	$0	0	Form 4
2026-08-21	Feldman Andrew D.	S (D)	6	$210.21	16,853	Form 4
2026-08-21	Feldman Andrew D.	S (D)	1,400	$207.28	21,453	Form 4
2026-08-21	Feldman Andrew D.	S (D)	4,594	$208.86	16,859	Form 4
2026-08-21	Feldman Andrew D.	S (D)	1,600	$205.32	22,853	Form 4
2026-08-21	Feldman Andrew D.	S (D)	8,832	$201.12	48,044	Form 4
2026-08-21	Feldman Andrew D.	S (D)	33,575	$200.13	56,876	Form 4
2026-08-21	Feldman Andrew D.	S (D)	66,237	$199.33	90,451	Form 4
2026-08-21	Feldman Andrew D.	S (D)	6,699	$202.28	41,345	Form 4
2026-08-21	Feldman Andrew D.	S (D)	12,092	$203.37	29,253	Form 4
2026-08-21	Feldman Andrew D.	S (D)	4,800	$204.44	24,453	Form 4
2026-08-21	Feldman Andrew D.	G (D)	50,000	—	16,853	Form 4
2026-08-21	Feldman Andrew D.	C (A)	237,559	$0	254,412	Form 4
2026-08-21	Feldman Andrew D.	S (D)	43,553	$196.2	210,859	Form 4
2026-08-21	Feldman Andrew D.	S (D)	21,307	$197.45	189,552	Form 4
2026-08-21	Feldman Andrew D.	S (D)	32,864	$198.18	156,688	Form 4
2026-08-21	Lie Sean	S (D)	16,293	$210.01	368,926	Form 4
2026-08-21	Lie Sean	C (A)	16,293	$0	385,219	Form 4
2026-08-20	Lie Sean	S (D)	11,706	$203.78	1,067,467	Form 4
2026-08-20	Lie Sean	S (D)	10,715	$211.42	393,578	Form 4
2026-08-20	Lie Sean	S (D)	46,214	$210.56	404,293	Form 4
2026-08-20	Lie Sean	S (D)	114,976	$209.86	450,507	Form 4
2026-08-20	Lie Sean	C (A)	696,798	—	1,292,247	Form 4
2026-08-20	Lie Sean	G (D)	213,074	$0	1,079,173	Form 4
2026-08-20	Lie Sean	S (D)	24,652	$212.64	368,926	Form 4
2026-08-20	Lie Sean	S (D)	47,766	$204.87	1,019,701	Form 4
2026-08-20	Lie Sean	S (D)	133,383	$205.67	886,318	Form 4
2026-08-20	Lie Sean	S (D)	93,017	$206.67	793,301	Form 4
2026-08-20	Lie Sean	S (D)	108,507	$207.68	684,794	Form 4
2026-08-20	Lie Sean	S (D)	119,311	$208.69	565,483	Form 4
2026-08-19	Susan Lior	J (A)	46,422	—	244,206	Form 4
2026-08-19	Susan Lior	J (D)	902,235	—	8,295,180	Form 4
2026-08-19	Susan Lior	J (A)	46,780	—	207,571	Form 4
2026-08-18	Foundation Capital Management Co. LF II, L.L.C. / Foundation Capital VIII Principals Fund, L.L.C. / Foundation Capital Leadership Fund II, L.P. / Foundation Capital Management Co. VIII, L.L.C. / Foundation Capital VIII, L.P.	J (D)	29,741	$0	0	Form 4
2026-08-18	Foundation Capital Management Co. LF II, L.L.C. / Foundation Capital VIII Principals Fund, L.L.C. / Foundation Capital Leadership Fund II, L.P. / Foundation Capital Management Co. VIII, L.L.C. / Foundation Capital VIII, L.P.	C (A)	136,426	—	136,426	Form 4
2026-08-18	Foundation Capital Management Co. LF II, L.L.C. / Foundation Capital VIII Principals Fund, L.L.C. / Foundation Capital Leadership Fund II, L.P. / Foundation Capital Management Co. VIII, L.L.C. / Foundation Capital VIII, L.P.	J (D)	1,738,913	$0	0	Form 4
2026-08-18	Foundation Capital Management Co. LF II, L.L.C. / Foundation Capital VIII Principals Fund, L.L.C. / Foundation Capital Leadership Fund II, L.P. / Foundation Capital Management Co. VIII, L.L.C. / Foundation Capital VIII, L.P.	J (D)	37,453	$0	0	Form 4
2026-08-18	Foundation Capital Management Co. LF II, L.L.C. / Foundation Capital VIII Principals Fund, L.L.C. / Foundation Capital Leadership Fund II, L.P. / Foundation Capital Management Co. VIII, L.L.C. / Foundation Capital VIII, L.P.	J (D)	136,426	$0	0	Form 4
2026-08-18	Foundation Capital Management Co. LF II, L.L.C. / Foundation Capital VIII Principals Fund, L.L.C. / Foundation Capital Leadership Fund II, L.P. / Foundation Capital Management Co. VIII, L.L.C. / Foundation Capital VIII, L.P.	J (A)	449,885	$0	449,885	Form 4
2026-08-18	Foundation Capital Management Co. LF II, L.L.C. / Foundation Capital VIII Principals Fund, L.L.C. / Foundation Capital Leadership Fund II, L.P. / Foundation Capital Management Co. VIII, L.L.C. / Foundation Capital VIII, L.P.	J (D)	449,885	$0	0	Form 4
2026-08-18	Foundation Capital Management Co. LF II, L.L.C. / Foundation Capital VIII Principals Fund, L.L.C. / Foundation Capital Leadership Fund II, L.P. / Foundation Capital Management Co. VIII, L.L.C. / Foundation Capital VIII, L.P.	C (A)	1,738,913	—	1,738,913	Form 4

Transaction codes in this quarter

S: 204 J: 74 C: 40 G: 4

Get CBRS insider transactions through the API

Request with your API key

curl "https://sec-api.dev/api/v1/insider-transactions?period=2026q3&cik=2021728&limit=100" \
  -H "Authorization: Bearer $SEC_API_KEY"

Insider trading API guide · CBRS company page · Cerebras Systems Inc. on SEC.gov

Questions

Are insiders buying or selling Cerebras Systems Inc. (CBRS)?

In Q3 2026, insiders at Cerebras Systems Inc. reported 322 non-derivative transactions on 38 Forms 3, 4 and 5: 0 open-market purchases and 204 sales worth $389.7M. Grants, tax withholding and option exercises are counted as transactions but are not purchases or sales.

Where do these Cerebras Systems Inc. insider trades come from?

From the SEC Insider Transactions Data Sets for Q3 2026, which republish the Forms 3, 4 and 5 filed on EDGAR. Each row links to its filing on SEC.gov.

Source: SEC Insider Transactions Data Sets, Q3 2026, retrieved 2026-10-27. Footnotes, derivative holdings and amendments are in the linked filings. Not investment advice.

Plain-text version for agents and LLMs: /insider-trading/cbrs.md

Independent. Not affiliated with, endorsed by, or sponsored by the U.S. Securities and Exchange Commission. Data is reproduced from public SEC filings and datasets. Not investment advice.