Other4

Cerebras Systems Inc.

Total Value

Filing Date

Sep 25, 2026

1 transactions

Trade Summary

On Sep 23, 2026, Susan Lior, Insider, reported $0 of Cerebras Systems Inc. (CBRS) across 1 transactions. The filing covers Class A Common Stock and reflects balanced net activity of $0. Insider transactions are sourced from SEC Form 4 disclosures and should be reviewed alongside company fundamentals and the insider's broader trading history.

Insider Information

Name: Susan Lior
Role: Insider
Location: SUNNYVALE, CA

Filing Details

Filing Date: Sep 25, 2026
Transaction Date: Sep 23, 2026
Accession Number: 0001193125-26-402911
Form Type: 4

Non-Derivative Transactions

Date	Security	Shares	Price	Type	Value
Sep 23, 2026	Class A Common Stock	451,118	—	Other	—
Sep 23, 2026	Class A Common Stock	25,757	—	Other	—
Sep 23, 2026	Class A Common Stock	23,735	—	Other	—

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Footnotes

(F1)Represents a pro-rata, in-kind distribution by the Eclipse Entities (as defined below) to its partners, for no additional consideration (the "Distribution").
(F2)Following the distribution, consists of (i) 385,774 shares of Class A common stock held by Eclipse Continuity Fund I, L.P. ("Eclipse Continuity Fund"); (ii) 3,156,361 shares of Class A common stock held by Eclipse SPV II, L.P. ("Eclipse SPV II"); (iii) 289,144 shares of Class A common stock held by Eclipse SPV XIII, L.P. ("Eclipse SPV XIII"); and (iv) 2,659,432 shares of Class A common stock held by Eclipse Ventures Fund I, L.P. ("Eclipse Fund," and together with Eclipse Continuity Fund, Eclipse SPV II, and Eclipse SPV XIII, "Eclipse Entities"). The Reporting Person is the sole managing member of the general partner of each of the Eclipse Entities and may be deemed to have voting, investment, and dispositive power with respect to the shares held by such entities.
(F3)The shares were obtained pursuant to a pro-rata, in-kind distribution from the Eclipse Entities, for no additional consideration.
(F4)This amount reflects the reported transaction and includes 11,046 shares that were inadvertently omitted from the Reporting Person's Form 4 filed on August 18, 2026 due to an administrative error.
(F5)This amount reflects the reported transaction and includes 7,093 shares that were inadvertently omitted from the Reporting Person's Form 4 filed on August 18, 2026 due to an administrative error.
(F6)The shares are held directly by an estate-planning vehicle which is controlled by the Reporting Person.

SEC Form 4

FORM 4

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
or Section 30(h) of the Investment Company Act of 1940

OMB APPROVAL

OMB Number:			3235-0287
Estimated average burden
hours per response:			0.5

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

Check this box to indicate that a transaction was made pursuant to a contract, instruction or written plan for the purchase or sale of equity securities of the issuer that is intended to satisfy the affirmative defense conditions of Rule 10b5-1(c). See Instruction 10.

1. Name and Address of Reporting Person^*

Susan Lior

(Last)

(First)

(Middle)

C/O CEREBRAS SYSTEMS INC.

1237 E. ARQUES AVENUE

(Street)

SUNNYVALE

94085

(City)

(State)

(Zip)

2. Issuer Name and Ticker or Trading Symbol
Cerebras Systems Inc. [ CBRS ]

5. Relationship of Reporting Person(s) to Issuer
(Check all applicable)

X	Director	10% Owner
	Officer (give title below)	Other (specify below)

3. Date of Earliest Transaction (Month/Day/Year)
09/23/2026

4. If Amendment, Date of Original Filed (Month/Day/Year)

6. Individual or Joint/Group Filing (Check Applicable Line)

X	Form filed by One Reporting Person
	Form filed by More than One Reporting Person

Table I - Non-Derivative Securities Acquired, Disposed of, or Beneficially Owned
1. Title of Security (Instr. 3)	2. Transaction Date (Month/Day/Year)	2A. Deemed Execution Date, if any (Month/Day/Year)	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)
1. Title of Security (Instr. 3)	2. Transaction Date (Month/Day/Year)	2A. Deemed Execution Date, if any (Month/Day/Year)	Code	V	Amount	(A) or (D)	Price		6. Ownership Form: Direct (D) or Indirect (I) (Instr. 4)	7. Nature of Indirect Beneficial Ownership (Instr. 4)
Class A Common Stock	09/23/2026		J⁽¹⁾		451,118	D	⁽¹⁾	6,490,711	I	See footnote⁽²⁾
Class A Common Stock	09/23/2026		J⁽³⁾		25,757	A	⁽³⁾	351,927⁽⁴⁾	D
Class A Common Stock	09/23/2026		J⁽³⁾		23,735	A	⁽³⁾	309,603⁽⁵⁾	I	See footnote⁽⁶⁾

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 (Month/Day/Year)	3A. Deemed Execution Date, if any (Month/Day/Year)	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 (Month/Day/Year)		7. Title and Amount of Securities Underlying Derivative Security (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: Direct (D) or Indirect (I) (Instr. 4)	11. Nature of Indirect Beneficial Ownership (Instr. 4)
1. Title of Derivative Security (Instr. 3)	2. Conversion or Exercise Price of Derivative Security	3. Transaction Date (Month/Day/Year)	3A. Deemed Execution Date, if any (Month/Day/Year)	Code	V	(A)	(D)	Date Exercisable	Expiration Date	Title	Amount or Number of Shares	8. Price of Derivative Security (Instr. 5)		10. Ownership Form: Direct (D) or Indirect (I) (Instr. 4)	11. Nature of Indirect Beneficial Ownership (Instr. 4)

Explanation of Responses:

1. Represents a pro-rata, in-kind distribution by the Eclipse Entities (as defined below) to its partners, for no additional consideration (the "Distribution").

2. Following the distribution, consists of (i) 385,774 shares of Class A common stock held by Eclipse Continuity Fund I, L.P. ("Eclipse Continuity Fund"); (ii) 3,156,361 shares of Class A common stock held by Eclipse SPV II, L.P. ("Eclipse SPV II"); (iii) 289,144 shares of Class A common stock held by Eclipse SPV XIII, L.P. ("Eclipse SPV XIII"); and (iv) 2,659,432 shares of Class A common stock held by Eclipse Ventures Fund I, L.P. ("Eclipse Fund," and together with Eclipse Continuity Fund, Eclipse SPV II, and Eclipse SPV XIII, "Eclipse Entities"). The Reporting Person is the sole managing member of the general partner of each of the Eclipse Entities and may be deemed to have voting, investment, and dispositive power with respect to the shares held by such entities.

3. The shares were obtained pursuant to a pro-rata, in-kind distribution from the Eclipse Entities, for no additional consideration.

4. This amount reflects the reported transaction and includes 11,046 shares that were inadvertently omitted from the Reporting Person's Form 4 filed on August 18, 2026 due to an administrative error.

5. This amount reflects the reported transaction and includes 7,093 shares that were inadvertently omitted from the Reporting Person's Form 4 filed on August 18, 2026 due to an administrative error.

6. The shares are held directly by an estate-planning vehicle which is controlled by the Reporting Person.

	/s/ Lior Susan	09/25/2026
	** Signature of Reporting Person	Date
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.
Persons who respond to the collection of information contained in this form are not required to respond unless the form displays a currently valid OMB Number.

Form 4 as rendered by the SEC from accession 0001193125-26-402911.

Cerebras Systems Inc.

Trade Summary

Company Information

Insider Information

Filing Details

Non-Derivative Transactions

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Footnotes

SEC Form 4

SEC Filing

SEC Form 4