Robert Patrick Komin Jr. - 18 Aug 2026 Form 4 Insider Report for Cerebras Systems Inc. (CBRS)

Reporting relationship: Chief Financial Officer
Issuer ticker: CBRS
Reported as of: 18 Aug 2026
Net transaction value: $0
SEC form: 4
Accepted by SEC: 20 Aug 2026, 20:14:01 UTC
Prior SEC filing: 15 May 2026
Source filing: View source filing
Reporting owner signature: /s/ Robert Mills, Attorney-in-fact

Key filing fact

Robert Patrick Komin Jr. filed Form 4 for Cerebras Systems Inc. (CBRS) on 20 Aug 2026.

Key facts

This page summarizes Robert Patrick Komin Jr.'s Form 4 filing for Cerebras Systems Inc. (CBRS).
2 reported transactions and 2 derivative rows are listed below.
Accepted by SEC: 20 Aug 2026, 20:14.

Change

Previous filing in this sequence was filed on 15 May 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 (1)

CIK 0001648800 Primary reporting owner

Komin Robert Patrick Jr.

Relationship: Chief Financial 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: +32,500
Change %
Price: $0.000000^*
Shares after: 32,500
Date: 18 Aug 2026
Ownership: Direct
Footnotes: F1

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: -32,500
Change %: -3.8%
Price
Shares after: 821,653
Date: 18 Aug 2026
Ownership: Direct
Underlying class: Class A Common Stock
Underlying amount: 32,500
Exercise price
Footnotes: F1

CBRS holding Derivative

Class B Common Stock

No transaction description listed

Transaction value
Shares
Change %
Price
Shares after: 175,000
Date: 18 Aug 2026
Ownership: By GRAT
Underlying class: Class A Common Stock
Underlying amount: 175,000
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 1 footnote

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.