Benchmark Capital Management Co. VIII, L.L.C. - 24 Aug 2026 Form 4 Insider Report for Cerebras Systems Inc. (CBRS)

Reporting relationship: 10%+ Owner
Issuer ticker: CBRS
Reported as of: 24 Aug 2026
Net transaction value: $0
SEC form: 4
Accepted by SEC: 26 Aug 2026, 16:01:16 UTC
Prior SEC filing: 19 Aug 2026
Source filing: View source filing
Reporting owner signature: /s/ An-Yen Hu by power of attorney for Benchmark Capital Management Co. VIII, L.L.C.

Key filing fact

Benchmark Capital Management Co. VIII, L.L.C. filed Form 4 for Cerebras Systems Inc. (CBRS) on 26 Aug 2026.

Key facts

This page summarizes Benchmark Capital Management Co. VIII, L.L.C.'s Form 4 filing for Cerebras Systems Inc. (CBRS).
3 reported transactions and 18 derivative rows are listed below.
Accepted by SEC: 26 Aug 2026, 16:01.

Change

Previous filing in this sequence was filed on 19 Aug 2026.
Current net transaction value: $0.

Research use

This tells you what this filing adds before you inspect full transaction and derivative tables.
You can trace every row back to the original SEC filing document.

Evidence

Filed on Form 4

Ownership activity is grounded in SEC Form 4 disclosures.

View source filing

Reporting Owners (9)

CIK 0001593049 Primary reporting owner

Benchmark Capital Management Co. VIII, L.L.C.

Relationship: 10%+ Owner
Address: 2965 WOODSIDE ROAD, WOODSIDE
Signature: /s/ An-Yen Hu by power of attorney for Benchmark Capital Management Co. VIII, L.L.C.
Signature date: 26 Aug 2026

CIK 0001593052

Benchmark Capital Partners VIII, L.P.

Relationship: 10%+ Owner
Address: 2965 WOODSIDE ROAD, WOODSIDE
Signature: /s/ An-Yen Hu by power of attorney for Benchmark Capital Management Co. VIII, L.L.C., the General Partner of Benchmark Capital Partners VIII, L.P.
Signature date: 26 Aug 2026

CIK 0001597415

Benchmark Founders' Fund VIII, L.P.

Relationship: 10%+ Owner
Address: 2965 WOODSIDE ROAD, WOODSIDE
Signature: /s/ An-Yen Hu by power of attorney for Benchmark Capital Management Co. VIII, L.L.C., the General Partner of Benchmark Founders' Fund VIII, L.P.
Signature date: 26 Aug 2026

CIK 0001597399

Benchmark Founders' Fund VIII-B, L.P.

Relationship: 10%+ Owner
Address: 2965 WOODSIDE ROAD, WOODSIDE
Signature: /s/ An-Yen Hu by power of attorney for Benchmark Capital Management Co. VIII, L.L.C., the General Partner of Benchmark Founders' Fund VIII-B, L.P.
Signature date: 26 Aug 2026

CIK 0001754445

Benchmark Capital Management Co. IX, L.L.C.

Relationship: 10%+ Owner
Address: 2965 WOODSIDE ROAD, WOODSIDE
Signature: /s/ An-Yen Hu, Managing Member of Benchmark Capital Management Co. IX, L.L.C.
Signature date: 26 Aug 2026

CIK 0001754447

Benchmark Capital Partners IX, L.P.

Relationship: 10%+ Owner
Address: 2965 WOODSIDE ROAD, WOODSIDE
Signature: /s/ An-Yen Hu, Managing Member of Benchmark Capital Management Co. IX, L.L.C., the General Partner of Benchmark Capital Partners IX, L.P.
Signature date: 26 Aug 2026

CIK 0001754444

Benchmark Founders' Fund IX, L.P.

Relationship: 10%+ Owner
Address: 2965 WOODSIDE ROAD, WOODSIDE
Signature: /s/ An-Yen Hu, Managing Member of Benchmark Capital Management Co. IX, L.L.C., the General Partner of Benchmark Founders' Fund IX, L.P.
Signature date: 26 Aug 2026

CIK 0001756980

Benchmark Founders' Fund IX-A, L.P.

Relationship: 10%+ Owner
Address: 2965 WOODSIDE ROAD, WOODSIDE
Signature: /s/ An-Yen Hu, Managing Member of Benchmark Capital Management Co. IX, L.L.C., the General Partner of Benchmark Founders' Fund IX-A, L.P.
Signature date: 26 Aug 2026

CIK 0001754351

Benchmark Founders' Fund IX-B, L.P.

Relationship: 10%+ Owner
Address: 2965 WOODSIDE ROAD, WOODSIDE
Signature: /s/ An-Yen Hu, Managing Member of Benchmark Capital Management Co. IX, L.L.C., the General Partner of Benchmark Founders' Fund IX-B, L.P.
Signature date: 26 Aug 2026

Reported non-derivative transactions

Shares, units, or other non-derivative securities reported in this filing.

CBRS transaction

Class A Common Stock

Conversion of derivative security

Transaction value
Shares: +963,818
Change %
Price: $0.000000^*
Shares after: 963,818
Date: 24 Aug 2026
Ownership: See Footnote
Footnotes: F1, F2

CBRS transaction

Class A Common Stock

Conversion of derivative security

Transaction value
Shares: +963,818
Change %
Price: $0.000000^*
Shares after: 963,818
Date: 24 Aug 2026
Ownership: See Footnote
Footnotes: F1, F2

CBRS transaction

Class A Common Stock

Conversion of derivative security

Transaction value
Shares: +963,818
Change %
Price: $0.000000^*
Shares after: 963,818
Date: 24 Aug 2026
Ownership: See Footnote
Footnotes: F1, F2

CBRS transaction

Class A Common Stock

Conversion of derivative security

Transaction value
Shares: +963,818
Change %
Price: $0.000000^*
Shares after: 963,818
Date: 24 Aug 2026
Ownership: See Footnote
Footnotes: F1, F2

CBRS transaction

Class A Common Stock

Conversion of derivative security

Transaction value
Shares: +963,818
Change %
Price: $0.000000^*
Shares after: 963,818
Date: 24 Aug 2026
Ownership: See Footnote
Footnotes: F1, F2

CBRS transaction

Class A Common Stock

Conversion of derivative security

Transaction value
Shares: +963,818
Change %
Price: $0.000000^*
Shares after: 963,818
Date: 24 Aug 2026
Ownership: See Footnote
Footnotes: F1, F2

CBRS transaction

Class A Common Stock

Conversion of derivative security

Transaction value
Shares: +963,818
Change %
Price: $0.000000^*
Shares after: 963,818
Date: 24 Aug 2026
Ownership: See Footnote
Footnotes: F1, F2

CBRS transaction

Class A Common Stock

Conversion of derivative security

Transaction value
Shares: +963,818
Change %
Price: $0.000000^*
Shares after: 963,818
Date: 24 Aug 2026
Ownership: See Footnote
Footnotes: F1, F2

CBRS transaction

Class A Common Stock

Conversion of derivative security

Transaction value
Shares: +963,818
Change %
Price: $0.000000^*
Shares after: 963,818
Date: 24 Aug 2026
Ownership: See Footnote
Footnotes: F1, F2

CBRS transaction

Class A Common Stock

Other

Transaction value
Shares: -963,818
Change %: -100%
Price: $0.000000^*
Shares after: 0
Date: 24 Aug 2026
Ownership: See Footnote
Footnotes: F2, F3

CBRS transaction

Class A Common Stock

Other

Transaction value
Shares: -963,818
Change %: -100%
Price: $0.000000^*
Shares after: 0
Date: 24 Aug 2026
Ownership: See Footnote
Footnotes: F2, F3

CBRS transaction

Class A Common Stock

Other

Transaction value
Shares: -963,818
Change %: -100%
Price: $0.000000^*
Shares after: 0
Date: 24 Aug 2026
Ownership: See Footnote
Footnotes: F2, F3

CBRS transaction

Class A Common Stock

Other

Transaction value
Shares: -963,818
Change %: -100%
Price: $0.000000^*
Shares after: 0
Date: 24 Aug 2026
Ownership: See Footnote
Footnotes: F2, F3

CBRS transaction

Class A Common Stock

Other

Transaction value
Shares: -963,818
Change %: -100%
Price: $0.000000^*
Shares after: 0
Date: 24 Aug 2026
Ownership: See Footnote
Footnotes: F2, F3

CBRS transaction

Class A Common Stock

Other

Transaction value
Shares: -963,818
Change %: -100%
Price: $0.000000^*
Shares after: 0
Date: 24 Aug 2026
Ownership: See Footnote
Footnotes: F2, F3

CBRS transaction

Class A Common Stock

Other

Transaction value
Shares: -963,818
Change %: -100%
Price: $0.000000^*
Shares after: 0
Date: 24 Aug 2026
Ownership: See Footnote
Footnotes: F2, F3

CBRS transaction

Class A Common Stock

Other

Transaction value
Shares: -963,818
Change %: -100%
Price: $0.000000^*
Shares after: 0
Date: 24 Aug 2026
Ownership: See Footnote
Footnotes: F2, F3

CBRS transaction

Class A Common Stock

Other

Transaction value
Shares: -963,818
Change %: -100%
Price: $0.000000^*
Shares after: 0
Date: 24 Aug 2026
Ownership: See Footnote
Footnotes: F2, F3

Reported derivative securities

Options, warrants, convertible securities, or similar derivative positions disclosed in the filing.

CBRS transaction Derivative

Class B Common Stock

Conversion of derivative security

Transaction value
Shares: -963,818
Change %: -9.8%
Price: $0.000000^*
Shares after: 8,861,375
Date: 24 Aug 2026
Ownership: See Footnote
Underlying class: Class A Common Stock
Underlying amount: 963,818
Exercise price
Footnotes: F2, F4

CBRS transaction Derivative

Class B Common Stock

Conversion of derivative security

Transaction value
Shares: -963,818
Change %: -9.8%
Price: $0.000000^*
Shares after: 8,861,375
Date: 24 Aug 2026
Ownership: See Footnote
Underlying class: Class A Common Stock
Underlying amount: 963,818
Exercise price
Footnotes: F2, F4

CBRS transaction Derivative

Class B Common Stock

Conversion of derivative security

Transaction value
Shares: -963,818
Change %: -9.8%
Price: $0.000000^*
Shares after: 8,861,375
Date: 24 Aug 2026
Ownership: See Footnote
Underlying class: Class A Common Stock
Underlying amount: 963,818
Exercise price
Footnotes: F2, F4

CBRS transaction Derivative

Class B Common Stock

Conversion of derivative security

Transaction value
Shares: -963,818
Change %: -9.8%
Price: $0.000000^*
Shares after: 8,861,375
Date: 24 Aug 2026
Ownership: See Footnote
Underlying class: Class A Common Stock
Underlying amount: 963,818
Exercise price
Footnotes: F2, F4

CBRS transaction Derivative

Class B Common Stock

Conversion of derivative security

Transaction value
Shares: -963,818
Change %: -9.8%
Price: $0.000000^*
Shares after: 8,861,375
Date: 24 Aug 2026
Ownership: See Footnote
Underlying class: Class A Common Stock
Underlying amount: 963,818
Exercise price
Footnotes: F2, F4

CBRS transaction Derivative

Class B Common Stock

Conversion of derivative security

Transaction value
Shares: -963,818
Change %: -9.8%
Price: $0.000000^*
Shares after: 8,861,375
Date: 24 Aug 2026
Ownership: See Footnote
Underlying class: Class A Common Stock
Underlying amount: 963,818
Exercise price
Footnotes: F2, F4

CBRS transaction Derivative

Class B Common Stock

Conversion of derivative security

Transaction value
Shares: -963,818
Change %: -9.8%
Price: $0.000000^*
Shares after: 8,861,375
Date: 24 Aug 2026
Ownership: See Footnote
Underlying class: Class A Common Stock
Underlying amount: 963,818
Exercise price
Footnotes: F2, F4

CBRS transaction Derivative

Class B Common Stock

Conversion of derivative security

Transaction value
Shares: -963,818
Change %: -9.8%
Price: $0.000000^*
Shares after: 8,861,375
Date: 24 Aug 2026
Ownership: See Footnote
Underlying class: Class A Common Stock
Underlying amount: 963,818
Exercise price
Footnotes: F2, F4

CBRS transaction Derivative

Class B Common Stock

Conversion of derivative security

Transaction value
Shares: -963,818
Change %: -9.8%
Price: $0.000000^*
Shares after: 8,861,375
Date: 24 Aug 2026
Ownership: See Footnote
Underlying class: Class A Common Stock
Underlying amount: 963,818
Exercise price
Footnotes: F2, F4

CBRS holding Derivative

Class B Common Stock

No transaction description listed

Transaction value
Shares
Change %
Price
Shares after: 689,990
Date: 24 Aug 2026
Ownership: See Footnote
Underlying class: Class A Common Stock
Underlying amount: 689,990
Exercise price
Footnotes: F4, F5

CBRS holding Derivative

Class B Common Stock

No transaction description listed

Transaction value
Shares
Change %
Price
Shares after: 689,990
Date: 24 Aug 2026
Ownership: See Footnote
Underlying class: Class A Common Stock
Underlying amount: 689,990
Exercise price
Footnotes: F4, F5

CBRS holding Derivative

Class B Common Stock

No transaction description listed

Transaction value
Shares
Change %
Price
Shares after: 689,990
Date: 24 Aug 2026
Ownership: See Footnote
Underlying class: Class A Common Stock
Underlying amount: 689,990
Exercise price
Footnotes: F4, F5

CBRS holding Derivative

Class B Common Stock

No transaction description listed

Transaction value
Shares
Change %
Price
Shares after: 689,990
Date: 24 Aug 2026
Ownership: See Footnote
Underlying class: Class A Common Stock
Underlying amount: 689,990
Exercise price
Footnotes: F4, F5

CBRS holding Derivative

Class B Common Stock

No transaction description listed

Transaction value
Shares
Change %
Price
Shares after: 689,990
Date: 24 Aug 2026
Ownership: See Footnote
Underlying class: Class A Common Stock
Underlying amount: 689,990
Exercise price
Footnotes: F4, F5

CBRS holding Derivative

Class B Common Stock

No transaction description listed

Transaction value
Shares
Change %
Price
Shares after: 689,990
Date: 24 Aug 2026
Ownership: See Footnote
Underlying class: Class A Common Stock
Underlying amount: 689,990
Exercise price
Footnotes: F4, F5

CBRS holding Derivative

Class B Common Stock

No transaction description listed

Transaction value
Shares
Change %
Price
Shares after: 689,990
Date: 24 Aug 2026
Ownership: See Footnote
Underlying class: Class A Common Stock
Underlying amount: 689,990
Exercise price
Footnotes: F4, F5

CBRS holding Derivative

Class B Common Stock

No transaction description listed

Transaction value
Shares
Change %
Price
Shares after: 689,990
Date: 24 Aug 2026
Ownership: See Footnote
Underlying class: Class A Common Stock
Underlying amount: 689,990
Exercise price
Footnotes: F4, F5

CBRS holding Derivative

Class B Common Stock

No transaction description listed

Transaction value
Shares
Change %
Price
Shares after: 689,990
Date: 24 Aug 2026
Ownership: See Footnote
Underlying class: Class A Common Stock
Underlying amount: 689,990
Exercise price
Footnotes: F4, F5

^* marks a reported price that did not pass the local price check.

Additional SEC filing notes

Filing notes and footnotes

Section 16 status

Benchmark Capital Management Co. VIII, L.L.C. is no longer subject to Section 16 filing requirements. Form 4 or Form 5 obligations may still apply in specific circumstances.

Rule 10b5-1 trading plan

These transactions were reported as open-market trades under a Rule 10b5-1 plan. The plan lets an insider set trading instructions in advance, which can reduce the risk of trading while in possession of material nonpublic information.

Original filing language: transaction made pursuant to a contract, instruction, or written plan intended to satisfy Rule 10b5-1(c).

Explanation of responses 5 footnotes

Footnote F1

Conversion of a derivative security in accordance with its terms.

Footnote F2

The shares are held by Benchmark Capital Partners VIII, L.P. ("BCP VIII"), as nominee for itself, Benchmark Founders' Fund VIII, L.P. ("BFF VIII") and Benchmark Founders' Fund VIII-B, L.P. ("BFF VIII-B"). Benchmark Capital Management Co. VIII, L.L.C. ("BCMC VIII"), the general partner of each of BCP VIII, BFF VIII and BFF VIII-B, may be deemed to have sole voting and dispositive power over such shares. Each entity disclaims the existence of a "group" and disclaims beneficial ownership of the securities, except to the extent of such entity's pecuniary interest in such securities.

Footnote F3

Represents a pro-rata, in-kind distribution by BCP VIII and its affiliated funds, not for additional consideration, to its partners, including BCMC VIII and its respective members and assignees, in accordance with a Rule 10b5-1 trading plan adopted by the reporting person on May 14, 2026.

Footnote F4

Each share of Class B Common Stock held by the Reporting Person will automatically convert into one share of Class A Common Stock upon the sale or transfer of such share of Class B Common Stock, subject to certain exceptions, and in certain other circumstances described in the Issuer's amended and restated certificate of incorporation. Each share of Class B Common Stock will also be convertible at any time at the option of the Reporting Person into one share of Class A Common Stock.

Footnote F5

The shares are held by Benchmark Capital Partners IX, L.P. ("BCP IX"), as nominee for itself, Benchmark Founders' Fund IX, L.P. ("BFF IX"), Benchmark Founders' Fund IX-A, L.P. ("BFF IX-A"), and Benchmark Founders' Fund IX-B, L.P. ("BFF IX-B"). Benchmark Capital Management Co. IX, L.L.C. ("BCMC IX"), the general partner of each of BCP IX, BFF IX, BFF IX-A and BFF IX-B, may be deemed to have sole voting and dispositive power over such shares. Each such entity disclaims the existence of a "group" and disclaims beneficial ownership of any securities, except to the extent of such entity's pecuniary interest in such securities.

SEC remarks

This report is one of two reports, each on a separate Form 4, but relating to the same holdings being filed by entities affiliated with Benchmark.