Cerebras CFO converts 32.5K Class B to Class A

Q: What insider transaction did CBRS CFO Robert Komin report on this Form 4?

He reported converting 32,500 shares of Class B Common Stock into 32,500 shares of Class A Common Stock on 2026-08-18, at a stated price of $0.00 per share, representing a derivative conversion rather than an open-market trade.

Q: How many CBRS Class A shares does the CFO hold after the reported transaction?

After the transaction, Robert Patrick Komin Jr. holds 32,500 shares of CBRS Class A Common Stock directly. These shares were received through conversion of an equal number of Class B shares on 2026-08-18.

Q: What are the CFO’s remaining direct Class B holdings in CBRS after the conversion?

Following the conversion, he holds 821,653 shares of CBRS Class B Common Stock directly. The filing also notes that these Class B shares are convertible into an equal number of Class A shares at his election with no expiration date.

Q: What CBRS shares does the CFO hold indirectly through a GRAT?

Indirectly, by a GRAT, he is associated with 175,000 shares of CBRS Class B Common Stock, which are convertible into 175,000 shares of Class A Common Stock. These holdings are reported as indirect ownership with the nature of ownership described as “By GRAT.”

Cerebras Systems Inc. (CBRS) reported that Chief Financial Officer Robert Patrick Komin Jr. converted 32,500 shares of Class B Common Stock into 32,500 shares of Class A Common Stock on 2026-08-18, at a stated price of $0.00 per share.

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Rhea-AI Filing Summary

Cerebras Systems Inc. (CBRS) reported that Chief Financial Officer Robert Patrick Komin Jr. converted 32,500 shares of Class B Common Stock into 32,500 shares of Class A Common Stock on 2026-08-18, at a stated price of $0.00 per share. Following the conversion, he held 821,653 shares of Class B Common Stock directly and 32,500 shares of Class A Common Stock directly. An additional 175,000 shares of Class B Common Stock, convertible into an equal number of Class A shares, are held indirectly by a GRAT. The Class B shares are convertible into an equal number of Class A shares at his election with no expiration date.

Insider Trade Summary

32,500 shares exercised/converted

Exercise 3 txns

Insider Komin Robert Patrick Jr.

Role Chief Financial Officer

Type	Security	Shares	Price	Value
Conversion	Class B Common Stock ^F1	32,500	--	--
Conversion	Class A Common Stock ^F1	32,500	$0.00	$0.00
holding	Class B Common Stock ^F1	--	--	--

Holdings After Transaction: Class B Common Stock — 821,653 contracts (Direct); Class A Common Stock — 32,500 shares (Direct); Class B Common Stock — 175,000 contracts (Indirect, By GRAT)

Footnotes (1)

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.

Key Figures

Shares converted from Class B to Class A: 32,500 shares Conversion price per Class A share: $0.00 per share Direct Class B holdings after transaction: 821,653 shares +3 more

6 metrics

Shares converted from Class B to Class A 32,500 shares Class B to Class A conversion on 2026-08-18

Conversion price per Class A share $0.00 per share Class A shares received in derivative conversion

Direct Class B holdings after transaction 821,653 shares Class B Common Stock held directly after 2026-08-18

Direct Class A holdings after transaction 32,500 shares Class A Common Stock held directly after conversion

Indirect Class B holdings by GRAT 175,000 shares Class B Common Stock held indirectly, convertible into Class A

Underlying Class A shares from GRAT-held Class B 175,000 shares Underlying Class A Common Stock from indirect Class B position

Key Terms

Class B Common Stock, Class A Common Stock, GRAT, Conversion of derivative security

4 terms

Class B Common Stock financial

"The Class B Common Stock is convertible into an equal number"

A class B common stock is one of multiple types of a company’s ordinary shares that carries specific rights—often different voting power or dividend priority—compared with other classes. For investors it matters because those differences affect how much influence you have over company decisions, the income you might receive, and how freely the shares trade; think of it like owning a car with different keys: some keys let you start the engine and open the trunk, others only unlock the door.

Class A Common Stock financial

"convertible into an equal number of Class A Common Stock"

Class A common stock is a category of a company’s shares that carries a specific set of ownership rights—most commonly defined voting power and claims on dividends—set out in the company’s charter. For investors it matters because the class determines how much influence you have over corporate decisions, the share’s likely dividend and trading behavior, and how it compares in value to other share classes, like choosing a particular seat with different privileges at the company’s decision-making table.

GRAT financial

"nature_of_ownership": "By GRAT""

Conversion of derivative security financial

"transaction_code_description": "Conversion of derivative security""

FAQ

AI-generated questions and answers. How Rhea-AI works. Not financial advice.

What insider transaction did CBRS CFO Robert Komin report on this Form 4?

He reported converting 32,500 shares of Class B Common Stock into 32,500 shares of Class A Common Stock on 2026-08-18, at a stated price of $0.00 per share, representing a derivative conversion rather than an open-market trade.

How many CBRS Class A shares does the CFO hold after the reported transaction?

After the transaction, Robert Patrick Komin Jr. holds 32,500 shares of CBRS Class A Common Stock directly. These shares were received through conversion of an equal number of Class B shares on 2026-08-18.

What are the CFO’s remaining direct Class B holdings in CBRS after the conversion?

Following the conversion, he holds 821,653 shares of CBRS Class B Common Stock directly. The filing also notes that these Class B shares are convertible into an equal number of Class A shares at his election with no expiration date.

What CBRS shares does the CFO hold indirectly through a GRAT?

Indirectly, by a GRAT, he is associated with 175,000 shares of CBRS Class B Common Stock, which are convertible into 175,000 shares of Class A Common Stock. These holdings are reported as indirect ownership with the nature of ownership described as “By GRAT.”

Are CBRS Class B shares convertible and do they have an expiration date?

Yes. The filing states that each share of CBRS 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.

AI-generated analysis. How Rhea-AI works. Not financial advice.

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Accepted by SEC EDGAR 08/20/2026 - 08:14 PM EDT

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^*

Komin Robert Patrick Jr.

(Last)

(First)

(Middle)

C/O CEREBRAS SYSTEMS INC.

1237 E. ARQUES AVENUE

(Street)

SUNNYVALE

CALIFORNIA

94085

(City)

(State)

(Zip)

UNITED STATES

(Country)

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

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

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

2a. Foreign Trading Symbol

3. Date of Earliest Transaction (Month/Day/Year)
08/18/2026

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

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

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

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	08/18/2026		C		32,500	A	$0⁽¹⁾	32,500	D

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)
Class B Common Stock	⁽¹⁾	08/18/2026		C			32,500	⁽¹⁾	⁽¹⁾	Class A Common Stock	32,500	⁽¹⁾	821,653	D
Class B Common Stock	⁽¹⁾							⁽¹⁾	⁽¹⁾	Class A Common Stock	175,000		175,000	I	By GRAT

Explanation of Responses:

1. 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.

Remarks:

	/s/ Robert Mills, Attorney-in-fact	08/20/2026
	** 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: SEC 1474 (03-26)

Source: View Original Filing on SEC EDGAR