Cerebras officer Dhiraj Mallick proposes $77.9M sale

The notice identifies option-exercise and performance-stock-unit shares and reports a prior sale of 38,889 shares on August 18, 2026.

Rhea-AI Filing Summary

Cerebras Systems Inc. (CBRS) officer Dhiraj Mallick reported a proposed sale of 396,000 common shares, with an aggregate market value of $77,909,040. September 29, 2026, is listed as the approximate sale date, with Morgan Stanley Smith Barney LLC and NASDAQ named in the securities information. The shares listed for sale include 276,000 from stock option exercises and 120,000 from performance stock units. During the prior three months, Mallick sold 38,889 common shares on August 18, 2026, with reported proceeds of $8,642,077.14.

Key Figures

Proposed sale: 396,000 common shares Aggregate market value: $77,909,040 Shares outstanding: 112,247,109 shares +4 more

7 metrics

Proposed sale 396,000 common shares Approximate sale date: September 29, 2026

Aggregate market value $77,909,040 Proposed sale

Shares outstanding 112,247,109 shares Securities information

Option exercise shares 276,000 common shares Date listed: September 29, 2026

Performance stock unit shares 120,000 common shares Date listed: May 13, 2026

Prior shares sold 38,889 common shares August 18, 2026

Prior-sale proceeds $8,642,077.14 Sale on August 18, 2026

Key Terms

Rule 144, Exercise of Stock Options, Performance Stock Units

3 terms

Rule 144 regulatory

"paragraph (a) of Rule 144"

Rule 144 is a U.S. securities regulation that sets conditions under which restricted or insider-held shares can be legally resold to the public, such as required holding periods, availability of public information, limits on how much can be sold at once, and certain filing requirements. For investors it matters because it determines when previously locked-up shares can enter the market — like a release valve that can increase supply, affect share price, and signal insider intent.

Exercise of Stock Options financial

"Exercise of Stock Options"

Performance Stock Units financial

"Performance Stock Units"

Performance stock units are a type of company award that grants employees shares of stock only if certain performance goals are met. They motivate employees to work toward specific company achievements, aligning their interests with those of shareholders. For investors, they can influence a company's future stock supply and reflect management’s confidence in reaching key targets.

FAQ

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

How many CBRS shares does Dhiraj Mallick plan to sell?

Dhiraj Mallick, an officer of Cerebras Systems Inc., reported a proposed sale of 396,000 common shares, with an aggregate market value of $77,909,040 and an approximate sale date of September 29, 2026.

What shares are included in the proposed CBRS sale?

The securities listed for sale include 276,000 common shares from exercise of stock options dated September 29, 2026, and 120,000 common shares from performance stock units dated May 13, 2026.

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

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Available on EDGAR 09/29/2026 - 04:25 PM Accepted by SEC EDGAR 09/29/2026 - 04:25 PM Learn about SEC filing dates

Form 144 Filer Information	UNITED STATES SECURITIES AND EXCHANGE COMMISSION Washington, D.C. 20549 Form 144 NOTICE OF PROPOSED SALE OF SECURITIES PURSUANT TO RULE 144 UNDER THE SECURITIES ACT OF 1933
FORM 144

144: Filer Information

Filer CIK	0002039572
Filer CCC	XXXXXXXX
Is this a LIVE or TEST Filing?	LIVE TEST
Submission Contact Information
Name
Phone
E-Mail Address

144: Issuer Information

Name of Issuer	Cerebras Systems Inc.
SEC File Number	001-43284
Address of Issuer	1237 E. Arques Avenue Sunnyvale CALIFORNIA 94085
Phone	6509334980
Name of Person for Whose Account the Securities are To Be Sold	DHIRAJ MALLICK
See the definition of "person" in paragraph (a) of Rule 144. Information is to be given not only as to the person for whose account the securities are to be sold but also as to all other persons included in that definition. In addition, information shall be given as to sales by all persons whose sales are required by paragraph (e) of Rule 144 to be aggregated with sales for the account of the person filing this notice.
Relationship to Issuer	Officer

144: Securities Information

Title of the Class of Securities To Be Sold	Name and Address of the Broker	Number of Shares or Other Units To Be Sold	Aggregate Market Value	Number of Shares or Other Units Outstanding	Approximate Date of Sale	Name the Securities Exchange
Common	Morgan Stanley Smith Barney LLC Executive Financial Services 1 New York Plaza 8th Floor New York NY 10004	396000	77909040.00	112247109	09/29/2026	NASDAQ

Furnish the following information with respect to the acquisition of the securities to be sold and with respect to the payment of all or any part of the purchase price or other consideration therefor:

144: Securities To Be Sold

Title of the Class	Date you Acquired	Nature of Acquisition Transaction	Name of Person from Whom Acquired	Is this a Gift?	Date Donor Acquired	Amount of Securities Acquired	Date of Payment	Nature of Payment *
Common	09/29/2026	Exercise of Stock Options	Issuer			276000	09/29/2026	Cash
Common	05/13/2026	Performance Stock Units	Issuer			120000	05/13/2026	N/A

* If the securities were purchased and full payment therefor was not made in cash at the time of purchase, explain in the table or in a note thereto the nature of the consideration given. If the consideration consisted of any note or other obligation, or if payment was made in installments describe the arrangement and state when the note or other obligation was discharged in full or the last installment paid.

Furnish the following information as to all securities of the issuer sold during the past 3 months by the person for whose account the securities are to be sold.

144: Securities Sold During The Past 3 Months

Name and Address of Seller	Title of Securities Sold	Date of Sale	Amount of Securities Sold	Gross Proceeds
DHIRAJ MALLICK 1237 E. Arques Avenue Sunnyvale CA 94085	Common	08/18/2026	38889	8642077.14

144: Remarks and Signature

Remarks
Date of Notice	09/29/2026
Date of Plan Adoption or Giving of Instruction, If Relying on Rule 10b5-1	06/30/2026
ATTENTION:
The person for whose account the securities to which this notice relates are to be sold hereby represents by signing this notice that he does not know any material adverse information in regard to the current and prospective operations of the Issuer of the securities to be sold which has not been publicly disclosed. If such person has adopted a written trading plan or given trading instructions to satisfy Rule 10b5-1 under the Exchange Act, by signing the form and indicating the date that the plan was adopted or the instruction given, that person makes such representation as of the plan adoption or instruction date.
Signature	/s/ Dhiraj Mallick
ATTENTION: Intentional misstatements or omission of facts constitute Federal Criminal Violations (See 18 U.S.C. 1001)