Jane Street Group (CBRS) discloses 5.1% Cerebras Systems ownership on Schedule 13G

Rhea-AI Filing Summary

Jane Street Group, LLC and its subsidiary Jane Street Capital, LLC report beneficial ownership of Class A common stock of Cerebras Systems Inc.. The filing states that they beneficially own 5,222,522 shares of Class A common stock, representing 5.1% of the class. Both entities have 0 shares with sole voting or dispositive power and 5,222,522 shares with shared voting and shared dispositive power. Jane Street Capital, LLC is identified as the subsidiary that acquired the securities and is described as a broker or dealer registered under section 15 of the Exchange Act. The reporting persons provide their business address in New York, while Cerebras Systems Inc. is based in Sunnyvale, California.

Key Figures

Shares beneficially owned: 5,222,522 shares Percent of class owned: 5.1% Shared voting power: 5,222,522 shares +3 more

6 metrics

Shares beneficially owned 5,222,522 shares Class A common stock beneficially owned by Jane Street entities

Percent of class owned 5.1% Percentage of Cerebras Systems Inc. Class A common stock

Shared voting power 5,222,522 shares Shares over which reporting persons have shared voting power

Shared dispositive power 5,222,522 shares Shares over which reporting persons have shared dispositive power

Sole voting power 0 shares Shares with sole voting power held by reporting persons

Sole dispositive power 0 shares Shares with sole dispositive power held by reporting persons

Key Terms

beneficially owned, shared voting power, shared dispositive power, parent holding company, +1 more

5 terms

beneficially owned financial

"Item 4. | Ownership (a) | Amount beneficially owned: 5,222,522.00"

Beneficially owned describes securities or assets where a person has the economic rights and control—such as the right to receive dividends and to direct voting—even if legal title is held in another name. Think of it like having the keys and using a car that’s registered to someone else: you get the benefits and make decisions. Investors care because beneficial ownership reveals who truly controls value and voting power, affecting corporate decisions and takeover dynamics.

shared voting power financial

"Shared Voting Power 5,222,522.00"

Shared voting power occurs when two or more parties jointly have the right to vote or decide how a block of company shares is cast, like co-owners who must agree before moving a piece of furniture. Investors care because who controls voting rights affects board elections, major corporate decisions and takeover outcomes, and shared control can alter regulatory disclosures and the practical influence any holder has over a company’s direction and value.

shared dispositive power financial

"Shared Dispositive Power 5,222,522.00"

parent holding company regulatory

"If a parent holding company has filed this schedule"

subsidiary regulatory

"Subsidiary: Jane Street Capital, LLC - (a) Broker or dealer"

A subsidiary is a company that is controlled or owned by a larger company, known as the parent company. Think of it like a branch or division of a bigger organization; it operates separately but is ultimately guided by the parent. For investors, understanding subsidiaries helps clarify how a larger company is structured and where its resources and risks are concentrated.

FAQ

How many CBRS shares does Jane Street report owning on this Schedule 13G?

The reporting persons disclose beneficial ownership of 5,222,522 shares of Cerebras Systems Inc. Class A common stock, representing 5.1% of the outstanding class, with all such shares subject to shared voting and shared dispositive power.

What percentage of Cerebras Systems Inc. (CBRS) is owned by Jane Street?

The filing reports that Jane Street Group, LLC and Jane Street Capital, LLC beneficially own 5.1% of Cerebras Systems Inc. Class A common stock, based on 5,222,522 shares held with shared voting and dispositive power and no sole voting or dispositive authority.

Who are the reporting persons on the Cerebras Systems Inc. (CBRS) Schedule 13G?

The Schedule 13G lists Jane Street Group, LLC and Jane Street Capital, LLC as reporting persons. Jane Street Capital, LLC is identified as the subsidiary that acquired the securities and is classified as a broker or dealer registered under section 15 of the Exchange Act.

What voting and dispositive powers over CBRS shares does Jane Street disclose?

The reporting persons state they have 0 shares with sole voting and sole dispositive power and 5,222,522 shares with shared voting power and shared dispositive power over Cerebras Systems Inc. Class A common stock, reflecting joint authority over those shares.

Where are Jane Street and Cerebras Systems Inc. (CBRS) located according to the Schedule 13G?

Cerebras Systems Inc. lists its principal executive offices at 1237 E. Arques Ave., Sunnyvale, California 94085. Jane Street Group, LLC and Jane Street Capital, LLC provide their business address as 250 Vesey Street, 3rd Floor, New York, NY 10281.

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Available on EDGAR 08/13/2026 - 04:38 PM Accepted by SEC EDGAR 08/13/2026 - 04:38 PM Learn about SEC filing dates

SECURITIES AND EXCHANGE COMMISSION
Washington, D.C. 20549

SCHEDULE 13G

UNDER THE SECURITIES EXCHANGE ACT OF 1934

Cerebras Systems Inc.

(Name of Issuer)

Class A common stock, $0.00001 par value per share

(Title of Class of Securities)

15675D103

(CUSIP Number)

06/30/2026

(Date of Event Which Requires Filing of this Statement)

Check the appropriate box to designate the rule pursuant to which this Schedule is filed:

Rule 13d-1(b)

Rule 13d-1(c)

Rule 13d-1(d)

schemaVersion:

SCHEDULE 13G

CUSIP Number(s): 15675D103

1

Names of Reporting Persons

JANE STREET GROUP, LLC

2

Check the appropriate box if a member of a Group (see instructions)

(a)
(b)

3

Sec Use Only

4

Citizenship or Place of Organization

DELAWARE

Number of Shares Beneficially Owned by Each Reporting Person With:

5	Sole Voting Power 0.00
6	Shared Voting Power 5,222,522.00
7	Sole Dispositive Power 0.00
8	Shared Dispositive Power 5,222,522.00

9

Aggregate Amount Beneficially Owned by Each Reporting Person

5,222,522.00

10

Check box if the aggregate amount in row (9) excludes certain shares (See Instructions)

11

Percent of class represented by amount in row (9)

5.1 %

12

Type of Reporting Person (See Instructions)

HC

SCHEDULE 13G

CUSIP Number(s): 15675D103

1

Names of Reporting Persons

Jane Street Capital, LLC

2

Check the appropriate box if a member of a Group (see instructions)

(a)
(b)

3

Sec Use Only

4

Citizenship or Place of Organization

DELAWARE

Number of Shares Beneficially Owned by Each Reporting Person With:

5	Sole Voting Power 0.00
6	Shared Voting Power 5,222,522.00
7	Sole Dispositive Power 0.00
8	Shared Dispositive Power 5,222,522.00

9

Aggregate Amount Beneficially Owned by Each Reporting Person

5,222,522.00

10

Check box if the aggregate amount in row (9) excludes certain shares (See Instructions)

11

Percent of class represented by amount in row (9)

5.1 %

12

Type of Reporting Person (See Instructions)

BD

SCHEDULE 13G

Item 1.
(a)	Name of issuer: Cerebras Systems Inc.
(b)	Address of issuer's principal executive offices: 1237 E. ARQUES AVE., SUNNYVALE, CALIFORNIA, 94085.
Item 2.
(a)	Name of person filing: Jane Street Group, LLC; Jane Street Capital, LLC
(b)	Address or principal business office or, if none, residence: Jane Street Group, LLC 250 Vesey Street 3rd Floor New York, NY 10281 Jane Street Capital, LLC 250 Vesey Street 3rd Floor New York, NY 10281
(c)	Citizenship: See Item 4 of Cover Page
(d)	Title of class of securities: Class A common stock, $0.00001 par value per share
(e)	CUSIP Number(s): 15675D103
Item 3.	If this statement is filed pursuant to §§ 240.13d-1(b) or 240.13d-2(b) or (c), check whether the person filing is a:
(a)	Broker or dealer registered under section 15 of the Act (15 U.S.C. 78o);
(b)	Bank as defined in section 3(a)(6) of the Act (15 U.S.C. 78c);
(c)	Insurance company as defined in section 3(a)(19) of the Act (15 U.S.C. 78c);
(d)	Investment company registered under section 8 of the Investment Company Act of 1940 (15 U.S.C. 80a-8);
(e)	An investment adviser in accordance with § 240.13d-1(b)(1)(ii)(E);
(f)	An employee benefit plan or endowment fund in accordance with § 240.13d-1(b)(1)(ii)(F);
(g)	A parent holding company or control person in accordance with § 240.13d-1(b)(1)(ii)(G);
(h)	A savings associations as defined in Section 3(b) of the Federal Deposit Insurance Act (12 U.S.C. 1813);
(i)	A church plan that is excluded from the definition of an investment company under section 3(c)(14) of the Investment Company Act of 1940 (15 U.S.C. 80a-3);
(j)	A non-U.S. institution in accordance with § 240.13d-1(b)(1)(ii)(J). If filing as a non-U.S. institution in accordance with § 240.13d-1(b)(1)(ii)(J), please specify the type of institution:
(k)	Group, in accordance with Rule 240.13d-1(b)(1)(ii)(K).
Item 4.	Ownership
(a)	Amount beneficially owned: 5,222,522.00
(b)	Percent of class: 5.1%
(c)	Number of shares as to which the person has:
	(i) Sole power to vote or to direct the vote: 0
	(ii) Shared power to vote or to direct the vote: 5,222,522.00
	(iii) Sole power to dispose or to direct the disposition of: 0
	(iv) Shared power to dispose or to direct the disposition of: 5,222,522.00
Item 5.	Ownership of 5 Percent or Less of a Class.
	Not Applicable
Item 6.	Ownership of more than 5 Percent on Behalf of Another Person.
	Not Applicable
Item 7.	Identification and Classification of the Subsidiary Which Acquired the Security Being Reported on by the Parent Holding Company or Control Person.
	If a parent holding company has filed this schedule, pursuant to Rule 13d-1(b)(ii)(G), so indicate under Item 3(g) and attach an exhibit stating the identity and the Item 3 classification of the relevant subsidiary. If a parent holding company has filed this schedule pursuant to Rule 13d-1(c) or Rule 13d-1(d), attach an exhibit stating the identification of the relevant subsidiary. Subsidiary: Jane Street Capital, LLC - (a) Broker or dealer registered under section 15 of the Act (15 U.S.C. 78o)
Item 8.	Identification and Classification of Members of the Group.
	Not Applicable
Item 9.	Notice of Dissolution of Group.
	Not Applicable

Item 10.

Certifications:

By signing below I certify that, to the best of my knowledge and belief, the securities referred to above were acquired and are held in the ordinary course of business and were not acquired and are not held for the purpose of or with the effect of changing or influencing the control of the issuer of the securities and were not acquired and are not held in connection with or as a participant in any transaction having that purpose or effect, other than activities solely in connection with a nomination under § 240.14a-11.

SIGNATURE

After reasonable inquiry and to the best of my knowledge and belief, I certify that the information set forth in this statement is true, complete and correct.

JANE STREET GROUP, LLC

Signature:	Jeremy Kahn
Name/Title:	Jeremy Kahn (Authorized Signatory)
Date:	08/13/2026

Jane Street Capital, LLC

Signature:	/s/ Jeremy Kahn
Name/Title:	Jeremy Kahn (Authorized Signatory)
Date:	08/13/2026