Cerebras Systems CBRS Insider Ownership

NASDAQ CBRS

$164.17 -3.75 (-2.23%)

At close: Oct 9, 2026 · 4:00 PM EDT

Insider Holdings by Owner

56.91Mn Shares

Insider Ownership Statistics

as of 30 Sep, 2026

Insider Ownership

27.33%

▼-2.64% pp QoQ

Shares Held by Insiders

62.38Mn

filed for Sep 2026

▼-8.81% QoQ

Shares Outstanding

228.20Mn

228,203,927 shares

Direct Holdings

23.98Mn

Indirect: 38.39Mn

Net Shares Traded (QoQ)

-6.03Mn

net selling in Sep 2026

Insiders Holding Shares

with Form 4 holdings on file

Shares Owned by Insiders

Shares held % of outstanding

Latest —

Average ownership —

Peak ownership —

Shares Purchased/Sold by Insiders

Bought Sold

Latest quarter —

Net over range —

Buying quarters —

Insider Ownership Summary

Updated Oct 10, 2026

Across the past 12 months, open-market trades by Cerebras Systems insiders were all sales, totaling $408.35 million (1.98Mn shares).

By number of insiders, Cerebras Systems saw 7 insiders sell on the open market over the past 12 months and none buy.
Sean Lie (Chief Technology Officer) was the top open-market seller of Cerebras Systems over the past 12 months, with $193.79 million sold (931.29K shares) and the latest sale on September 25, 2026.
The latest open-market trade on record is a sale of 396K shares for $80.8 million by Dhiraj Mallick (Chief Operating Officer) on September 29, 2026.
In transactions other than open-market trades, Cerebras Systems insiders received 15K shares in stock awards, acquired 26.5Mn shares through option exercises and conversions, gave up 713.38K shares to cover taxes or exercise prices and gave away 315.11K shares as gifts over the past 12 months.
According to Business Quant data, insiders at Cerebras Systems reported 62.43Mn shares in total in their latest Form 4 filings, or 27.36% of the 228.2Mn shares outstanding; that total is down 8.73% from 68.4Mn shares at the end of Q2 2026.
Direct holdings account for 23.98Mn shares (38.42%) of CBRS's insider total, and indirect holdings through trusts, partnerships and family members for 38.45Mn shares (61.58%).
Holdings in Cerebras Systems stock are reported by 12 insiders, the officers, directors and 10% owners who have filed a Form 4 in the past two years.
Cerebras Systems' top three insider holders by shares held are Steven Vassallo (Director, 25.9Mn shares), Andrew D. Feldman (CEO, President, 14.06Mn shares) and Benchmark Capital Management Co. VIII, L.L.C. (10% owner, 8.86Mn shares).
Steven Vassallo holds 41.48% of the combined insider position in Cerebras Systems.
Institutions accounted for 35.71% of CBRS's outstanding shares in Q2 2026.
Over the trailing 12 months, 13 insiders reported transactions in CBRS stock across 59 Form 4 filings.
These insider figures for Cerebras Systems are based on Form 4 filings through October 7, 2026.

Form 4 Holdings

Insiders Holding CBRS

Insiders 13

Shares held 56.91Mn

Of outstanding 24.94%

#	Insider	Position	Direct	Indirect	Total	Share of Insiders	Last Filed
1	Andrew D. Feldman	Ceo, President	13,945,134	1,085	13,946,219	24.5%	06 Oct, 2026
2	Steven Vassallo	Director	0	10,564,167	10,564,167	18.6%	08 Sep, 2026
3	Capital Management Co. Viii, L.L.C. Foundation	TenPercentOwner	0	10,282,535	10,282,535	18.1%	25 Aug, 2026
4	Capital Management Co. Viii, L.L.C. Benchmark	TenPercentOwner	0	8,861,375	8,861,375	15.6%	26 Aug, 2026
5	Sean Lie	Chief Technology Officer	7,892,561	0	7,892,561	13.9%	28 Sep, 2026
6	Ai Infrastructure Management Co., L.L.C. Benchmark	TenPercentOwner	0	2,527,646	2,527,646	4.4%	19 May, 2026
7	Robert Patrick Jr. Komin	Chief Financial Officer	821,653	0	821,653	1.4%	20 Aug, 2026
8	Lior Susan	Director	420,355	372,659	793,014	1.4%	02 Oct, 2026
9	Dhiraj Mallick	Chief Operating Officer	520,807	0	520,807	0.9%	30 Sep, 2026
10	Eric Vishria	Director	0	334,980	334,980	0.6%	07 Oct, 2026
11	Paul R. Iii Auvil	Director	203,750	0	203,750	0.4%	15 May, 2026
12	Yagnesh Patel	Chief Accounting Officer	129,944	0	129,944	0.2%	30 Sep, 2026
13	Elena A. Donio	Director	33,701	0	33,701	0.1%	15 May, 2026

Each row is that insider’s most recently reported position, from Form 4 filings over the last 60 months — which is why this total does not tie to the quarterly series above, where a quarter counts only the insiders who filed in it. Shares held through a fund or institutional portfolio are counted on the institutional ownership page instead.

Form 4 Filings

630 Insider Transactions

Source SEC Form 4

Latest quarter Sep 2026

Date	Insider	Position	Transaction	Shares	Price	Value	Shares Held After	Ownership
05 Oct, 2026	Eric Vishria	Director	Acquired J	59,126	$0.00	$0	334,980	Indirect
05 Oct, 2026	Andrew D. Feldman	Ceo, President	Acquired J	159	$0.00	$0	1,085	Indirect
30 Sep, 2026	Lior Susan	Director	Disposed J	1,198,489	—	—	5,292,222	Indirect
30 Sep, 2026	Lior Susan	Director	Acquired J	68,428	—	—	420,355	Direct
30 Sep, 2026	Lior Susan	Director	Acquired J	63,056	—	—	372,659	Indirect
29 Sep, 2026	Robert Patrick Jr. Komin	Chief Financial Officer	Disposed S	1,830	$211.79	$387.58K	30,670	Direct
29 Sep, 2026	Dhiraj Mallick	Chief Operating Officer	Acquired C	276,000	$0.00	$0	396,000	Direct
28 Sep, 2026	Yagnesh Patel	Chief Accounting Officer	Disposed S	1,320	$204.50	$269.94K	15,356	Direct
29 Sep, 2026	Dhiraj Mallick	Chief Operating Officer	Disposed S	598	$212.93	$127.33K	395,402	Direct
29 Sep, 2026	Robert Patrick Jr. Komin	Chief Financial Officer	Disposed S	2,771	$211.03	$584.76K	27,899	Direct
29 Sep, 2026	Robert Patrick Jr. Komin	Chief Financial Officer	Disposed S	2,802	$210.02	$588.48K	25,097	Direct
29 Sep, 2026	Dhiraj Mallick	Chief Operating Officer	Disposed S	18,274	$212.20	$3.88Mn	377,128	Direct
29 Sep, 2026	Robert Patrick Jr. Komin	Chief Financial Officer	Disposed S	2,197	$208.98	$459.13K	22,900	Direct
29 Sep, 2026	Dhiraj Mallick	Chief Operating Officer	Disposed S	41,391	$211.29	$8.75Mn	335,737	Direct
29 Sep, 2026	Robert Patrick Jr. Komin	Chief Financial Officer	Disposed S	700	$207.83	$145.48K	22,200	Direct
29 Sep, 2026	Dhiraj Mallick	Chief Operating Officer	Disposed S	46,427	$210.27	$9.76Mn	289,310	Direct
29 Sep, 2026	Robert Patrick Jr. Komin	Chief Financial Officer	Disposed S	800	$206.68	$165.34K	21,400	Direct
29 Sep, 2026	Dhiraj Mallick	Chief Operating Officer	Disposed S	41,278	$209.33	$8.64Mn	248,032	Direct
29 Sep, 2026	Robert Patrick Jr. Komin	Chief Financial Officer	Disposed S	600	$205.47	$123.28K	20,800	Direct
29 Sep, 2026	Dhiraj Mallick	Chief Operating Officer	Disposed S	20,714	$208.38	$4.32Mn	227,318	Direct

Showing 1 to 20 of 630 transactions