SEC ownership of Cerebras Systems Inc.

Top holders, 13D/G large-stake signals, insider positions, and transaction flow tied to CIK 0002021728.

Comparable stake leader

FMR LLC

Disclosed value leader

FMR LLC

Comparable rows

50/50

Latest evidence

15 Sep 2026

Top shareholders Insider holders Latest transactions
Public ticker
CBRS on Nasdaq
Parsed ownership sources
13D/G, 13F, and 3/4/5
Source: Parsed SEC ownership filingsUse: Compare filing families carefully
Largest SEC-reported holder
FMR LLC
Ranking: Comparable ownership first, then disclosed value
Ownership snapshot CIK-linked ownership evidence from parsed SEC filings. 3 signals
Comparable ownership rows
50 of 50
Meaning: Rows with safely comparable ownership %
Latest 13D/G holder
FMR LLC
Source: Latest parsed Schedule 13D/G stake
Latest parsed ownership date
15 Sep 2026
Freshness: Most recent filing date in this holder set
Issuer Names, identifiers, and filing context for this profile. 2 identity fields
Issuer CIK
0002021728
Issuer location
Sunnyvale, CA

Ownership snapshot

Top shareholders of Cerebras Systems Inc. (13F + 13D/G + 3/4/5)

Grouped by holder across the latest SEC ownership disclosures. Start with comparable ownership when available, then verify the linked 13F, 13D/G, or 3/4/5 evidence.

Comparable stake leader
FMR LLC
Disclosed value leader
FMR LLC
Comparable rows
50/50
Latest evidence
15 Sep 2026
13D/G 13F 3/4/5 Lead comparable stake: 26% 13D/G row: FMR LLC Showing 1-8 of 50 holder rows.

Quick read

FMR LLC leads the comparable SEC ownership view at 26%.

50 of 50 rows have a safely comparable ownership percentage. Use this as a filing-backed starting point, then open the detailed table for source links, reporting role, position value, share count, and filing date.

Open SEC evidence Opens FMR LLC's linked filing trail.
Comparable ownership Top 5
FMR LLC 26%
Foundation Capital Management Co.... 12%
Atreides Management, LP 11%
Benchmark Capital Partners VIII, ... 9.8%
Andrew D. Feldman 9.2%

Ownership % is shown only when SEC disclosures are safely comparable across share classes.

Detailed SEC evidence table Showing 1-8 of 50 holder rows
Holder Evidence Ownership % Position 12M Net Δ As of
FMR LLC
13D/G 13F
Company
13D/G 13F
26%
$6,382,086,021
28,878,217 shares
 +$720,447,845 30 Jun 2026
Foundation Capital Management Co. VIII, L.L.C.
13D/G 3/4/5
10%+ Owner
13D/G 3/4/5
12%
$2,907,840,906
14,210,932 shares
 $0 30 Jun 2026
Atreides Management, LP
13D/G 13F
Company
13D/G 13F
11%
$2,157,479,722
10,543,836 shares
 $0 30 Jun 2026
Benchmark Capital Partners VIII, L.P.
13D/G 3/4/5
Benchmark Capital Management Co. VIII, L.L.C. · 10%+ Owner
13D/G 3/4/5
9.8%
$2,502,000,258
12,227,545 shares
 $0 30 Jun 2026
Andrew D. Feldman
3/4/5 13D/G
CEO, President, Director · Andrew Feldman
3/4/5 13D/G
9.2%
from 13D/G
$3,248,395,227
14,587,793 shares
mixed-class rows
 -$64,252,742 04 Sep 2026
COATUE MANAGEMENT LLC
13F 13D/G
Company
13F 13D/G
7.1%
from 13D/G
$1,549,437,188
7,011,028 shares
 — 30 Jun 2026
Altimeter Capital Management, LP
13F 13D/G
Company · Gerstner Bradley Thomas
13F 13D/G
6.2%
from 13D/G
$1,596,733,177
7,225,037 shares
 — 30 Jun 2026
JANE STREET GROUP, LLC
13D/G 13F
Company
13D/G 13F
5.1%
$1,068,632,452
5,222,522 shares
 $0 30 Jun 2026
How to read this table

Rows are grouped by holder and ranked first by SEC-reported ownership % when it is safely comparable, then by disclosed holdings value. — indicates unavailable or non-comparable values; "mixed-class rows" means the latest filing spans non-comparable classes.

Forms 3/4/5 flow

Insider trading overview

Net insider flow leans to selling over the last 12 months. Net value: -$295,594,142.

Buys
$0
Insiders: 0
Sells
$295,594,142
Insiders: 6
Net
-$295,594,142
Shares: -1,432,179
Window
Last 12 months
4 rolling buckets
Buy value Sell value
Shares: 0 Shares: 1,432,179
Window (months) Buy shares Sell shares Buy value Sell value Net value
0-3 0 1,432,179 $0 $295,594,142 -$295,594,142
3-6 0 0 $0 $0 $0
6-9 0 0 $0 $0 $0
9-12 0 0 $0 $0 $0

Reporting owners

Insider holders from Forms 3/4/5

Showing 1-20 of 27 reporting-owner rows connected to Cerebras Systems Inc.. Open a relationship link for the CIK-to-CIK filing trail.

Rows
27
Largest Forms 3/4/5 holder
Andrew D. Feldman
Net 12M change
-$295,594,141
Latest report
15 Sep 2026
Name Relationship Holdings Value Past Year Net Change Change % Valuation Report Date
Andrew D. Feldman CEO, President, Director $3,248,395,227 -$64,252,742 -1.9% Mixed 04 Sep 2026
Sean Lie Chief Technology Officer $1,866,092,168 -$168,715,693 -8.3% Mixed 04 Sep 2026
Benchmark Capital Management Co. VIII, L.L.C. 10%+ Owner $1,799,479,421 Mixed 24 Aug 2026
Benchmark Capital Management Co. IX, L.L.C. 10%+ Owner $1,799,479,421 Mixed 24 Aug 2026
Benchmark Founders' Fund VIII-B, L.P. 10%+ Owner $1,799,479,421 Mixed 24 Aug 2026
Benchmark Founders' Fund VIII, L.P. 10%+ Owner $1,799,479,421 Mixed 24 Aug 2026
Benchmark Founders' Fund IX-B, L.P. 10%+ Owner $1,799,479,421 Mixed 24 Aug 2026
Benchmark Capital Partners VIII, L.P. 10%+ Owner $1,799,479,421 Mixed 24 Aug 2026
Benchmark Capital Partners IX, L.P. 10%+ Owner $1,799,479,421 Mixed 24 Aug 2026
Benchmark Founders' Fund IX, L.P. 10%+ Owner $1,799,479,421 Mixed 24 Aug 2026
Benchmark Founders' Fund IX-A, L.P. 10%+ Owner $1,799,479,421 Mixed 24 Aug 2026
Benchmark AI Infrastructure Fund, L.P. 10%+ Owner $513,289,073 Mixed 24 Aug 2026
Benchmark AI Infrastructure Fund B, L.P. 10%+ Owner $513,289,073 Mixed 24 Aug 2026
Benchmark AI Infrastructure Management Co., L.L.C. 10%+ Owner $513,289,073 Mixed 24 Aug 2026
Robert Patrick Komin Jr. Chief Financial Officer $209,572,824 Mixed 18 Aug 2026
Lior Susan Director $131,251,679 Median 15 Sep 2026
Steven Vassallo Director $73,323,618 -$21,424,237 -23% Mixed 04 Sep 2026
Eric Vishria Director $51,127,687 -$15,685,957 -23% Median 08 Sep 2026
Dhiraj Mallick Chief Operating Officer $28,801,200 -$22,759,554 -44% Filing P/S 18 Aug 2026
Foundation Capital Management Co. LF II, L.L.C. 10%+ Owner $6,084,586 Mixed 21 Aug 2026

Recent insider transactions for Cerebras Systems Inc.

Showing up to 300 recent insider transactions from the last 12 months.

Insider Symbol Class Transaction % SEC-reported value SEC-reported price Shares Shares owned Date Ownership
Lior Susan CBRS Class A Common Stock Other 9.31% 23,734 278,775 15 Sep 2026 See footnote
Lior Susan CBRS Class A Common Stock Other 8.42% 24,463 315,124 15 Sep 2026 Direct
Lior Susan CBRS Class A Common Stock Other -6.1% -451,115 6,941,829 15 Sep 2026 See footnote
Eric Vishria CBRS Class A Common Stock Other 23.8% 44,507 231,347 08 Sep 2026 See Footnote
Andrew D. Feldman CBRS Class A Common Stock Other 17.5% 120 806 08 Sep 2026 By Feldman Bravo Family Trust
Steven Vassallo CBRS Class A Common Stock Sale -22.5% $10,515,135 $210.30 -50,000 171,977 04 Sep 2026 By Revocable Trust
Sean Lie CBRS Class A Common Stock Sale -13.4% $11,235,154 $210.16 -53,460 345,569 04 Sep 2026 Direct
Sean Lie CBRS Class A Common Stock Gift -3.86% -16,038 399,029 04 Sep 2026 Direct
Sean Lie CBRS Class A Common Stock Conversion of derivative security 12.5% 46,141 415,067 04 Sep 2026 Direct
Sean Lie CBRS Class B Common Stock Conversion of derivative security -0.6% -46,141 7,582,992 04 Sep 2026 Direct
Sean Lie CBRS Class B Common Stock Options Exercise 0.61% 46,141 7,629,133 04 Sep 2026 Direct
Sean Lie CBRS Stock Option Options Exercise -13.8% -46,141 289,021 04 Sep 2026 Direct
Andrew D. Feldman CBRS Class A Common Stock Sale -69% $7,879,687 $210.46 -37,441 16,853 04 Sep 2026 Direct
Andrew D. Feldman CBRS Class A Common Stock Conversion of derivative security 222.2% 37,441 54,294 04 Sep 2026 Direct
Andrew D. Feldman CBRS Class B Common Stock Conversion of derivative security -0.27% -37,441 13,945,134 04 Sep 2026 Direct
Andrew D. Feldman CBRS Class B Common Stock Options Exercise 0.27% 37,441 13,982,575 04 Sep 2026 Direct
Andrew D. Feldman CBRS Stock Option Options Exercise -6.66% -37,441 525,000 04 Sep 2026 Direct
Lior Susan CBRS Class A Common Stock Other 22.9% 47,470 255,041 02 Sep 2026 See footnote
Lior Susan CBRS Class A Common Stock Other 19% 46,455 290,661 02 Sep 2026 Direct
Lior Susan CBRS Class A Common Stock Other -10.9% -902,236 7,392,944 02 Sep 2026 See footnote
Eric Vishria CBRS Class A Common Stock Other 31.3% 44,507 186,840 24 Aug 2026 See Footnote
Benchmark Capital Management Co. VIII, L.L.C. CBRS Class A Common Stock Other -100% -963,818 0 24 Aug 2026 See Footnote
Benchmark Capital Management Co. VIII, L.L.C. CBRS Class A Common Stock Other -100% -963,818 0 24 Aug 2026 See Footnote
Benchmark Capital Management Co. VIII, L.L.C. CBRS Class A Common Stock Other -100% -963,818 0 24 Aug 2026 See Footnote
Benchmark Capital Management Co. VIII, L.L.C. CBRS Class A Common Stock Other -100% -963,818 0 24 Aug 2026 See Footnote
Benchmark Capital Management Co. VIII, L.L.C. CBRS Class A Common Stock Other -100% -963,818 0 24 Aug 2026 See Footnote
Benchmark Capital Management Co. VIII, L.L.C. CBRS Class A Common Stock Other -100% -963,818 0 24 Aug 2026 See Footnote
Benchmark Capital Management Co. VIII, L.L.C. CBRS Class A Common Stock Other -100% -963,818 0 24 Aug 2026 See Footnote
Benchmark Capital Management Co. VIII, L.L.C. CBRS Class A Common Stock Other -100% -963,818 0 24 Aug 2026 See Footnote
Benchmark Capital Management Co. VIII, L.L.C. CBRS Class A Common Stock Other -100% -963,818 0 24 Aug 2026 See Footnote
Benchmark Capital Management Co. VIII, L.L.C. CBRS Class A Common Stock Conversion of derivative security 963,818 963,818 24 Aug 2026 See Footnote
Benchmark Capital Management Co. VIII, L.L.C. CBRS Class A Common Stock Conversion of derivative security 963,818 963,818 24 Aug 2026 See Footnote
Benchmark Capital Management Co. VIII, L.L.C. CBRS Class A Common Stock Conversion of derivative security 963,818 963,818 24 Aug 2026 See Footnote
Benchmark Capital Management Co. VIII, L.L.C. CBRS Class A Common Stock Conversion of derivative security 963,818 963,818 24 Aug 2026 See Footnote
Benchmark Capital Management Co. VIII, L.L.C. CBRS Class A Common Stock Conversion of derivative security 963,818 963,818 24 Aug 2026 See Footnote
Benchmark Capital Management Co. VIII, L.L.C. CBRS Class A Common Stock Conversion of derivative security 963,818 963,818 24 Aug 2026 See Footnote
Benchmark Capital Management Co. VIII, L.L.C. CBRS Class A Common Stock Conversion of derivative security 963,818 963,818 24 Aug 2026 See Footnote
Benchmark Capital Management Co. VIII, L.L.C. CBRS Class A Common Stock Conversion of derivative security 963,818 963,818 24 Aug 2026 See Footnote
Benchmark Capital Management Co. VIII, L.L.C. CBRS Class A Common Stock Conversion of derivative security 963,818 963,818 24 Aug 2026 See Footnote
Benchmark Capital Management Co. VIII, L.L.C. CBRS Class B Common Stock Conversion of derivative security -9.81% -963,818 8,861,375 24 Aug 2026 See Footnote
Benchmark Capital Management Co. VIII, L.L.C. CBRS Class B Common Stock Conversion of derivative security -9.81% -963,818 8,861,375 24 Aug 2026 See Footnote
Benchmark Capital Management Co. VIII, L.L.C. CBRS Class B Common Stock Conversion of derivative security -9.81% -963,818 8,861,375 24 Aug 2026 See Footnote
Benchmark Capital Management Co. VIII, L.L.C. CBRS Class B Common Stock Conversion of derivative security -9.81% -963,818 8,861,375 24 Aug 2026 See Footnote
Benchmark Capital Management Co. VIII, L.L.C. CBRS Class B Common Stock Conversion of derivative security -9.81% -963,818 8,861,375 24 Aug 2026 See Footnote
Benchmark Capital Management Co. VIII, L.L.C. CBRS Class B Common Stock Conversion of derivative security -9.81% -963,818 8,861,375 24 Aug 2026 See Footnote
Benchmark Capital Management Co. VIII, L.L.C. CBRS Class B Common Stock Conversion of derivative security -9.81% -963,818 8,861,375 24 Aug 2026 See Footnote
Benchmark Capital Management Co. VIII, L.L.C. CBRS Class B Common Stock Conversion of derivative security -9.81% -963,818 8,861,375 24 Aug 2026 See Footnote
Benchmark Capital Management Co. VIII, L.L.C. CBRS Class B Common Stock Conversion of derivative security -9.81% -963,818 8,861,375 24 Aug 2026 See Footnote
Andrew D. Feldman CBRS Class A Common Stock Other 21.2% 120 686 24 Aug 2026 By Feldman Bravo Family Trust
Steven Vassallo CBRS Class A Common Stock Other 32.9% 34,548 139,618 21 Aug 2026 By Irrevocable Trust
* marks a reported price that did not pass the local price check.
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