Cerebras Systems Inc. (CBRS)

=== SEC Form 4 — Statement of Changes in Beneficial Ownership === Document Type: 4 Period of Report: 2026-08-18 10b5-1 Pre-arranged Plan: No --- Issuer --- Name: Cerebras Systems Inc. (CBRS) CIK: 0002021728 --- Reporting Owner --- Name: Komin Robert Patrick Jr. CIK: 0001648800 Role: Officer (Chief Financial Officer) --- Non-Derivative Transactions --- [Transaction #1] Security: Class A Common Stock Date: 2026-08-18 | Code: C (Conversion of derivative) Shares: +32,500 | Price: $0.00 Shares Owned After: 32,500 | Ownership: D (Direct) Footnotes: [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. --- Derivative Transactions --- [Transaction #1] Security: Class B Common Stock Date: 2026-08-18 | Code: C (Conversion of derivative) Shares: -32,500 Shares Owned After: 821,653 | Ownership: D (Direct) Footnotes: [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. [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. [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. [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. --- Holdings --- [Holding #1] Security: Class B Common Stock Ownership: I (Indirect) Footnotes: [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. [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. [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. --- Footnotes (Complete Index) --- 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. --- Signature --- /s/ /s/ Robert Mills, Attorney-in-fact (2026-08-20)