Dhiraj Mallick - 18 Aug 2026 Form 4 Insider Report for Cerebras Systems Inc. (CBRS)

Reporting relationship: Chief Operating Officer
Issuer ticker: CBRS
Reported as of: 18 Aug 2026
Net transaction value: -$8,642,077
SEC form: 4
Accepted by SEC: 20 Aug 2026, 20:05:40 UTC
Prior SEC filing: 01 Jul 2026
Source filing: View source filing
Reporting owner signature: /s/ Robert Mills, Attorney-in-fact

Key filing fact

Dhiraj Mallick filed Form 4 for Cerebras Systems Inc. (CBRS) on 20 Aug 2026.

Key facts

This page summarizes Dhiraj Mallick's Form 4 filing for Cerebras Systems Inc. (CBRS).
28 reported transactions and 1 derivative row are listed below.
Accepted by SEC: 20 Aug 2026, 20:05.

Change

Previous filing in this sequence was filed on 01 Jul 2026.
Current net transaction value: -$8,642,077.

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 (1)

CIK 0002039572 Primary reporting owner

Mallick Dhiraj

Relationship: Chief Operating Officer
Address: C/O CEREBRAS SYSTEMS INC., 1237 E. ARQUES AVENUE, SUNNYVALE
Signature: /s/ Robert Mills, Attorney-in-fact
Signature date: 20 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: +158,889
Change %
Price
Shares after: 158,889
Date: 18 Aug 2026
Ownership: Direct
Footnotes: F1

CBRS transaction

Class A Common Stock

Sale

Transaction value: $430
Shares: -2
Change %: -0%
Price: $214.85
Shares after: 158,887
Date: 18 Aug 2026
Ownership: Direct
Footnotes: F2

CBRS transaction

Class A Common Stock

Sale

Transaction value: $417,753
Shares: -1,937
Change %: -1.2%
Price: $215.67
Shares after: 156,950
Date: 18 Aug 2026
Ownership: Direct
Footnotes: F2, F3

CBRS transaction

Class A Common Stock

Sale

Transaction value: $715,202
Shares: -3,305
Change %: -2.1%
Price: $216.40
Shares after: 153,645
Date: 18 Aug 2026
Ownership: Direct
Footnotes: F2, F4

CBRS transaction

Class A Common Stock

Sale

Transaction value: $534,812
Shares: -2,458
Change %: -1.6%
Price: $217.58
Shares after: 151,187
Date: 18 Aug 2026
Ownership: Direct
Footnotes: F2, F5

CBRS transaction

Class A Common Stock

Sale

Transaction value: $667,640
Shares: -3,055
Change %: -2%
Price: $218.54
Shares after: 148,132
Date: 18 Aug 2026
Ownership: Direct
Footnotes: F2, F6

CBRS transaction

Class A Common Stock

Sale

Transaction value: $760,845
Shares: -3,465
Change %: -2.3%
Price: $219.58
Shares after: 144,667
Date: 18 Aug 2026
Ownership: Direct
Footnotes: F2, F7

CBRS transaction

Class A Common Stock

Sale

Transaction value: $1,501,128
Shares: -6,810
Change %: -4.7%
Price: $220.43
Shares after: 137,857
Date: 18 Aug 2026
Ownership: Direct
Footnotes: F2, F8

CBRS transaction

Class A Common Stock

Sale

Transaction value: $1,381,308
Shares: -6,237
Change %: -4.5%
Price: $221.47
Shares after: 131,620
Date: 18 Aug 2026
Ownership: Direct
Footnotes: F2, F9

CBRS transaction

Class A Common Stock

Sale

Transaction value: $650,578
Shares: -2,925
Change %: -2.2%
Price: $222.42
Shares after: 128,695
Date: 18 Aug 2026
Ownership: Direct
Footnotes: F2, F10

CBRS transaction

Class A Common Stock

Sale

Transaction value: $201,186
Shares: -900
Change %: -0.7%
Price: $223.54
Shares after: 127,795
Date: 18 Aug 2026
Ownership: Direct
Footnotes: F2, F11

CBRS transaction

Class A Common Stock

Sale

Transaction value: $82,848
Shares: -369
Change %: -0.29%
Price: $224.52
Shares after: 127,426
Date: 18 Aug 2026
Ownership: Direct
Footnotes: F2, F12

CBRS transaction

Class A Common Stock

Sale

Transaction value: $138,238
Shares: -613
Change %: -0.48%
Price: $225.51
Shares after: 126,813
Date: 18 Aug 2026
Ownership: Direct
Footnotes: F2, F13

CBRS transaction

Class A Common Stock

Sale

Transaction value: $189,547
Shares: -837
Change %: -0.66%
Price: $226.46
Shares after: 125,976
Date: 18 Aug 2026
Ownership: Direct
Footnotes: F2, F14

CBRS transaction

Class A Common Stock

Sale

Transaction value: $144,380
Shares: -635
Change %: -0.5%
Price: $227.37
Shares after: 125,341
Date: 18 Aug 2026
Ownership: Direct
Footnotes: F2, F15

CBRS transaction

Class A Common Stock

Sale

Transaction value: $39,536
Shares: -173
Change %: -0.14%
Price: $228.53
Shares after: 125,168
Date: 18 Aug 2026
Ownership: Direct
Footnotes: F2, F16

CBRS transaction

Class A Common Stock

Sale

Transaction value: $61,495
Shares: -268
Change %: -0.21%
Price: $229.46
Shares after: 124,900
Date: 18 Aug 2026
Ownership: Direct
Footnotes: F2, F17

CBRS transaction

Class A Common Stock

Sale

Transaction value: $19,838
Shares: -86
Change %: -0.07%
Price: $230.67
Shares after: 124,814
Date: 18 Aug 2026
Ownership: Direct
Footnotes: F2, F18

CBRS transaction

Class A Common Stock

Sale

Transaction value: $102,817
Shares: -444
Change %: -0.36%
Price: $231.57
Shares after: 124,370
Date: 18 Aug 2026
Ownership: Direct
Footnotes: F19

CBRS transaction

Class A Common Stock

Sale

Transaction value: $117,706
Shares: -506
Change %: -0.41%
Price: $232.62
Shares after: 123,864
Date: 18 Aug 2026
Ownership: Direct
Footnotes: F20

CBRS transaction

Class A Common Stock

Sale

Transaction value: $95,657
Shares: -410
Change %: -0.33%
Price: $233.31
Shares after: 123,454
Date: 18 Aug 2026
Ownership: Direct
Footnotes: F21

CBRS transaction

Class A Common Stock

Sale

Transaction value: $252,759
Shares: -1,078
Change %: -0.87%
Price: $234.47
Shares after: 122,376
Date: 18 Aug 2026
Ownership: Direct
Footnotes: F22

CBRS transaction

Class A Common Stock

Sale

Transaction value: $129,525
Shares: -550
Change %: -0.45%
Price: $235.50
Shares after: 121,826
Date: 18 Aug 2026
Ownership: Direct
Footnotes: F23

CBRS transaction

Class A Common Stock

Sale

Transaction value: $87,716
Shares: -371
Change %: -0.3%
Price: $236.43
Shares after: 121,455
Date: 18 Aug 2026
Ownership: Direct
Footnotes: F24

CBRS transaction

Class A Common Stock

Sale

Transaction value: $4,982
Shares: -21
Change %: -0.02%
Price: $237.23
Shares after: 121,434
Date: 18 Aug 2026
Ownership: Direct

CBRS transaction

Class A Common Stock

Sale

Transaction value: $4,059
Shares: -17
Change %: -0.01%
Price: $238.78
Shares after: 121,417
Date: 18 Aug 2026
Ownership: Direct

CBRS transaction

Class A Common Stock

Sale

Transaction value: $340,094
Shares: -1,417
Change %: -1.2%
Price: $240.01
Shares after: 120,000
Date: 18 Aug 2026
Ownership: Direct
Footnotes: F25

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: -158,889
Change %: -23%
Price: $0.000000^*
Shares after: 520,807
Date: 18 Aug 2026
Ownership: Direct
Underlying class: Class A Common Stock
Underlying amount: 158,889
Exercise price
Footnotes: F1

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

Additional SEC filing notes

Filing notes and footnotes

Explanation of responses 25 footnotes

Footnote F1

The Class B Common Stock is convertible into an equal number of Class A Common Stock at any time, at the Reporting Person's election, and has no expiration date.

Footnote F2

These shares were sold by the Reporting Person to cover tax withholding obligations in connection with the settlement of restricted stock units, resulting in the automatic conversion of the shares into Class A Common Stock immediately prior to execution of the sale. The sale was to satisfy tax withholding obligations to be funded by a "sell to cover" transaction and does not represent a discretionary transaction by the Reporting Person. The Reporting Person is subject to a lock-up agreement that that was entered into with underwriters in connection with the Issuer's initial public offering and expires on the earlier of (i) 6:00 a.m. Eastern Time on the second trading day following the Issuer's release of earnings for the quarter ending September 30, 2026 or (ii) November 9, 2026. The sale of shares is a permissible exemption under the terms of the lock-up agreement.

Footnote F3

The sale price reported in Column 4 of Table 1 represents the weighted average sale price of the shares sold ranging from $215.01 to $215.99, inclusive. Upon request by the staff of the Securities and Exchange commission, the Issuer, or a security holder of the Issuer, the Reporting Person will provide full information regarding the number of shares sold at each separate price.

Footnote F4

The sale price reported in Column 4 of Table 1 represents the weighted average sale price of the shares sold ranging from $216.00 to $216.99, inclusive. Upon request by the staff of the Securities and Exchange commission, the Issuer, or a security holder of the Issuer, the Reporting Person will provide full information regarding the number of shares sold at each separate price.

Footnote F5

The sale price reported in Column 4 of Table 1 represents the weighted average sale price of the shares sold ranging from $217.00 to $217.99, inclusive. Upon request by the staff of the Securities and Exchange commission, the Issuer, or a security holder of the Issuer, the Reporting Person will provide full information regarding the number of shares sold at each separate price.

Footnote F6

The sale price reported in Column 4 of Table 1 represents the weighted average sale price of the shares sold ranging from $218.00 to $218.99, inclusive. Upon request by the staff of the Securities and Exchange commission, the Issuer, or a security holder of the Issuer, the Reporting Person will provide full information regarding the number of shares sold at each separate price.

Footnote F7

The sale price reported in Column 4 of Table 1 represents the weighted average sale price of the shares sold ranging from $219.00 to $219.99, inclusive. Upon request by the staff of the Securities and Exchange commission, the Issuer, or a security holder of the Issuer, the Reporting Person will provide full information regarding the number of shares sold at each separate price.

Footnote F8

The sale price reported in Column 4 of Table 1 represents the weighted average sale price of the shares sold ranging from $220.00 to $220.99, inclusive. Upon request by the staff of the Securities and Exchange commission, the Issuer, or a security holder of the Issuer, the Reporting Person will provide full information regarding the number of shares sold at each separate price.

Footnote F9

The sale price reported in Column 4 of Table 1 represents the weighted average sale price of the shares sold ranging from $221.00 to $221.99, inclusive. Upon request by the staff of the Securities and Exchange commission, the Issuer, or a security holder of the Issuer, the Reporting Person will provide full information regarding the number of shares sold at each separate price.

Footnote F10

The sale price reported in Column 4 of Table 1 represents the weighted average sale price of the shares sold ranging from $222.00 to $222.99, inclusive. Upon request by the staff of the Securities and Exchange commission, the Issuer, or a security holder of the Issuer, the Reporting Person will provide full information regarding the number of shares sold at each separate price.

Footnote F11

The sale price reported in Column 4 of Table 1 represents the weighted average sale price of the shares sold ranging from $223.00 to $223.99, inclusive. Upon request by the staff of the Securities and Exchange commission, the Issuer, or a security holder of the Issuer, the Reporting Person will provide full information regarding the number of shares sold at each separate price.

Footnote F12

The sale price reported in Column 4 of Table 1 represents the weighted average sale price of the shares sold ranging from $224.12 to $224.92, inclusive. Upon request by the staff of the Securities and Exchange commission, the Issuer, or a security holder of the Issuer, the Reporting Person will provide full information regarding the number of shares sold at each separate price.

Footnote F13

The sale price reported in Column 4 of Table 1 represents the weighted average sale price of the shares sold ranging from $225.01 to $225.98, inclusive. Upon request by the staff of the Securities and Exchange commission, the Issuer, or a security holder of the Issuer, the Reporting Person will provide full information regarding the number of shares sold at each separate price.

Footnote F14

The sale price reported in Column 4 of Table 1 represents the weighted average sale price of the shares sold ranging from $226.01 to $226.97, inclusive. Upon request by the staff of the Securities and Exchange commission, the Issuer, or a security holder of the Issuer, the Reporting Person will provide full information regarding the number of shares sold at each separate price.

Footnote F15

The sale price reported in Column 4 of Table 1 represents the weighted average sale price of the shares sold ranging from $227.01 to $227.96, inclusive. Upon request by the staff of the Securities and Exchange commission, the Issuer, or a security holder of the Issuer, the Reporting Person will provide full information regarding the number of shares sold at each separate price.

Footnote F16

The sale price reported in Column 4 of Table 1 represents the weighted average sale price of the shares sold ranging from $228.01 to $228.99, inclusive. Upon request by the staff of the Securities and Exchange commission, the Issuer, or a security holder of the Issuer, the Reporting Person will provide full information regarding the number of shares sold at each separate price.

Footnote F17

The sale price reported in Column 4 of Table 1 represents the weighted average sale price of the shares sold ranging from $229.00 to $229.88, inclusive. Upon request by the staff of the Securities and Exchange commission, the Issuer, or a security holder of the Issuer, the Reporting Person will provide full information regarding the number of shares sold at each separate price.

Footnote F18

The sale price reported in Column 4 of Table 1 represents the weighted average sale price of the shares sold ranging from $230.11 to $230.99, inclusive. Upon request by the staff of the Securities and Exchange commission, the Issuer, or a security holder of the Issuer, the Reporting Person will provide full information regarding the number of shares sold at each separate price.

Footnote F19

The sale price reported in Column 4 of Table 1 represents the weighted average sale price of the shares sold ranging from $231.12 to $231.99, inclusive. Upon request by the staff of the Securities and Exchange commission, the Issuer, or a security holder of the Issuer, the Reporting Person will provide full information regarding the number of shares sold at each separate price.

Footnote F20

The sale price reported in Column 4 of Table 1 represents the weighted average sale price of the shares sold ranging from $232.05 to $232.99, inclusive. Upon request by the staff of the Securities and Exchange commission, the Issuer, or a security holder of the Issuer, the Reporting Person will provide full information regarding the number of shares sold at each separate price.

Footnote F21

The sale price reported in Column 4 of Table 1 represents the weighted average sale price of the shares sold ranging from $233.00 to $233.92, inclusive. Upon request by the staff of the Securities and Exchange commission, the Issuer, or a security holder of the Issuer, the Reporting Person will provide full information regarding the number of shares sold at each separate price.

Footnote F22

The sale price reported in Column 4 of Table 1 represents the weighted average sale price of the shares sold ranging from $234.04 to $234.99, inclusive. Upon request by the staff of the Securities and Exchange commission, the Issuer, or a security holder of the Issuer, the Reporting Person will provide full information regarding the number of shares sold at each separate price.

Footnote F23

The sale price reported in Column 4 of Table 1 represents the weighted average sale price of the shares sold ranging from $235.00 to $235.99, inclusive. Upon request by the staff of the Securities and Exchange commission, the Issuer, or a security holder of the Issuer, the Reporting Person will provide full information regarding the number of shares sold at each separate price.

Footnote F24

The sale price reported in Column 4 of Table 1 represents the weighted average sale price of the shares sold ranging from $236.01 to $236.97, inclusive. Upon request by the staff of the Securities and Exchange commission, the Issuer, or a security holder of the Issuer, the Reporting Person will provide full information regarding the number of shares sold at each separate price.

Footnote F25

The sale price reported in Column 4 of Table 1 represents the weighted average sale price of the shares sold ranging from $240.00 to $240.01, inclusive. Upon request by the staff of the Securities and Exchange commission, the Issuer, or a security holder of the Issuer, the Reporting Person will provide full information regarding the number of shares sold at each separate price.