Cerebras Systems Inc. (CBRS)

=== SEC Form 4 — Statement of Changes in Beneficial Ownership === Document Type: 4 Period of Report: 2026-06-30 10b5-1 Pre-arranged Plan: No --- Issuer --- Name: Cerebras Systems Inc. (CBRS) CIK: 0002021728 --- Reporting Owner --- Name: Mallick Dhiraj CIK: 0002039572 Role: Officer (Chief Operating Officer) --- Non-Derivative Transactions --- [Transaction #1] Security: Class A Common Stock Date: 2026-06-30 | Code: C (Conversion of derivative) Shares: +10,000 Shares Owned After: 10,000 | 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. [Transaction #2] Security: Class A Common Stock Date: 2026-06-30 | Code: S (Open market sale) Shares: -10,000 | Price: $206.51 Total Value: $2,065,100.00 Shares Owned After: 0 | Ownership: D (Direct) Footnotes: [F2] The sale price reported in Column 4 of Table 1 represents the weighted average sale price of the shares sold ranging from $206.08 to $206.91, 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. --- Derivative Transactions --- [Transaction #1] Security: Class B Common Stock Date: 2026-06-30 | Code: C (Conversion of derivative) Shares: -10,000 | Price: $0.00 Shares Owned After: 679,696 | 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. --- 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. F2: The sale price reported in Column 4 of Table 1 represents the weighted average sale price of the shares sold ranging from $206.08 to $206.91, 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. --- Signature --- /s/ /s/ Robert Mills, Attorney-in-fact (2026-07-01)