Sec Form 4 Filing - Benchmark AI Infrastructure Management Co., L.L.C. @ Cerebras Systems Inc. - 2026-05-15

FORM 4 Check this box if no longer subject to Section 16. Form 4 or Form 5 obligations may continue. See Instruction 1(b).

UNITED STATES SECURITIES AND EXCHANGE COMMISSION Washington, D.C. 20549 STATEMENT OF CHANGES IN BENEFICIAL OWNERSHIP Filed pursuant to Section 16(a) of the Securities Exchange Act of 1934, Section 17(a) of the Public Utility Holding Company Act of 1935 or Section 30(h) of the Investment Company Act of 1940

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1. Name and Address of Reporting Person Benchmark AI Infrastructure Management Co., L.L.C. 2. Issuer Name and Ticker or Trading Symbol Cerebras Systems Inc. [ CBRS] 5. Relationship of Reporting Person(s) to Issuer (Check all applicable) _____ Director X __ 10% Owner _____ Officer (give title below) _____ Other (specify below) (Last) (First) (Middle) 2965 WOODSIDE ROAD 3. Date of Earliest Transaction (MM/DD/YY) 05/15/2026 (Street) WOODSIDE, CA94062 4. If Amendment, Date Original Filed (MM/DD/YY) 6. Individual or Joint/Group Filing (Check Applicable Line) _____ Form filed by One Reporting Person __ X __ Form filed by More than One Reporting Person (City) (State) (Zip)

Table I - Non-Derivative Securities Acquired, Disposed of, or Beneficially Owned 1.Title of Security (Instr. 3) 2. Transaction Date (MM/DD/YY) 2A. Deemed Execution Date, if any (MM/DD/YY) 3. Transaction Code (Instr. 8) 4. Securities Acquired (A) or Disposed of (D) (Instr. 3, 4 and 5) 5. Amount of Securities Beneficially Owned Following Reported Transaction(s) (Instr. 3 and 4) 6. Ownership Form: Direct (D) or Indirect (I) (Instr. 4) 7. Nature of Indirect Beneficial Ownership (Instr. 4) Code V Amount (A) or (D) Price

Table II - Derivative Securities Acquired, Disposed of, or Beneficially Owned ( e.g. , puts, calls, warrants, options, convertible securities) 1. Title of Derivative Security (Instr. 3) 2. Conversion or Exercise Price of Derivative Security 3. Transaction Date (MM/DD/YY) 3A. Deemed Execution Date, if any (MM/DD/YY) 4. Transaction Code (Instr. 8) 5. Number of Derivative Securities Acquired (A) or Disposed of (D) (Instr. 3, 4, and 5) 6. Date Exercisable and Expiration Date (MM/DD/YY) 7. Title and Amount of Underlying Securities (Instr. 3 and 4) 8. Price of Derivative Security (Instr. 5) 9. Number of Derivative Securities Beneficially Owned Following Reported Transaction(s) (Instr. 4) 10. Ownership Form of Derivative Security: Direct (D) or Indirect (I) (Instr. 4) 11. Nature of Indirect Beneficial Ownership (Instr. 4) Code V (A) (D) Date Exercisable Expiration Date Title Amount or Number of Shares Series H Preferred Stock ( 1 ) 05/15/2026 C 2,527,646 ( 1 ) ( 1 ) Class B Common Stock 2,527,646 $ 0 0 I See Footnote ( 2 ) Class B Common Stock ( 3 ) 05/15/2026 C 2,527,646 ( 3 ) ( 3 ) Class A Common Stock 2,527,646 $ 0 2,527,646 I See Footnote ( 2 )

Reporting Owners Reporting Owner Name / Address Relationships Director 10% Owner Officer Other Benchmark AI Infrastructure Management Co., L.L.C. 2965 WOODSIDE ROAD WOODSIDE, CA94062 X Benchmark AI Infrastructure Fund, L.P. 2965 WOODSIDE ROAD WOODSIDE, CA94062 X Benchmark AI Infrastructure Fund B, L.P. 2965 WOODSIDE ROAD WOODSIDE, CA94062 X Signatures /s/ An-Yen Hu, Managing Member of Benchmark AI Infrastructure Management Co., L.L.C. 05/19/2026 Signature of Reporting Person Date /s/ An-Yen Hu, Managing Member of Benchmark AI Infrastructure Management Co., L.L.C., the General Partner of Benchmark AI Infrastructure Fund, L.P. 05/19/2026 Signature of Reporting Person Date /s/ An-Yen Hu, Managing Member of Benchmark AI Infrastructure Management Co., L.L.C., the General Partner of Benchmark AI Infrastructure Fund B, L.P. 05/19/2026 Signature of Reporting Person Date

Explanation of Responses:

( 1 )Each share of Series H Preferred Stock automatically converted into one share of Class B Common Stock upon completion of the Issuer's initial public offering pursuant to its terms and has no expiration date. ( 2 )The shares are held by Benchmark AI Infrastructure Fund, L.P. ("AI Infrastructure"), as nominee for itself and Benchmark AI Infrastructure Fund B, L.P. ("AI Infrastructure B"). Benchmark AI Infrastructure Management Co., L.L.C. ("AI Infrastructure MC"), the general partner of each of AI Infrastructure and AI Infrastructure 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. ( 3 )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.

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.

Reminder: Report on a separate line for each class of securities beneficially owned directly or indirectly.

* If the form is filed by more than one reporting person, see Instruction 4(b)(v).

** Intentional misstatements or omissions of facts constitute Federal Criminal Violations. See 18 U.S.C. 1001 and 15 U.S.C. 78ff(a).

Note: File three copies of this Form, one of which must be manually signed. If space is insufficient, see Instruction 6 for procedure.
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