Cerebras officer may sell 710K shares under Rule 144

Cerebras Systems Inc. (CBRS) is the issuer for a notice filed by officer Sean Lie under Rule 144 indicating an intent to sell up to 710,247 shares of common stock.

Rhea-AI Filing Summary

Cerebras Systems Inc. (CBRS) is the issuer for a notice filed by officer Sean Lie under Rule 144 indicating an intent to sell up to 710,247 shares of common stock. The shares were or will be acquired upon vesting of performance stock units between 06/05/2026 and 08/22/2029. Morgan Stanley Smith Barney LLC Executive Financial Services is listed as the broker. The notice references Cerebras common stock listed on NASDAQ and reports Cerebras had 112,247,109 shares outstanding as of 08/20/2026. In the prior three months, Sean Lie reported sales totaling 31,290 shares of common stock for an aggregate of $6,426,936.13.

Key Figures

Shares to be sold under Rule 144: 710,247 shares Shares outstanding: 112,247,109 shares Sale on 08/18/2026: 21,257 shares for $4,720,625.00 +2 more

5 metrics

Shares to be sold under Rule 144 710,247 shares Common stock to be sold for the account of Sean Lie

Shares outstanding 112,247,109 shares Common stock outstanding as of 08/20/2026

Sale on 08/18/2026 21,257 shares for $4,720,625.00 Common stock sold by Sean Lie in past 3 months

Sale on 06/25/2026 10,033 shares for $1,706,311.13 Common stock sold by Sean Lie in past 3 months

Vesting period for PSUs 06/05/2026 to 08/22/2029 Period during which performance stock units vest

Key Terms

Rule 144, performance stock units, shares outstanding, common stock

4 terms

Rule 144 regulatory

"See the definition of "person" in 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.

performance stock units financial

"The securities to be sold were or will be acquired upon the vesting of 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.

shares outstanding financial

"112247109 | 08/20/2026 | NASDAQ"

Shares outstanding are the total number of a company’s stock units held by all shareholders, including institutional investors and company insiders — think of them as the total number of slices of the company’s ownership pie. Investors use this number to calculate how much of the company each share represents, and it directly affects per-share measures like earnings per share, ownership percentage and valuation; when the slice count changes, an investor’s claim and the company’s per-share metrics change too.

common stock financial

"Common | 08/18/2026 | 21257 | 4720625.00"

Common stock represents ownership shares in a company, giving investors a stake in its success and a say in important decisions through voting rights. It is the most common type of stock traded on markets and can provide income through dividends, as well as potential for value growth. For investors, holding common stock means sharing in the company’s profits and risks.

FAQ

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

What does the Form 144 filing by Sean Lie mean for Cerebras Systems Inc. (CBRS)?

The filing states that officer Sean Lie may sell up to 710,247 shares of Cerebras Systems Inc. common stock under Rule 144. It is a notice of a possible sale, not a confirmation that all or any of these shares have been sold.

How many Cerebras Systems Inc. (CBRS) shares does the Form 144 say may be sold?

The notice lists up to 710,247 shares of Cerebras Systems Inc. common stock to be sold. These shares were or will be acquired upon vesting of performance stock units during the period from 06/05/2026 through 08/22/2029.

What prior stock sales by Sean Lie in CBRS are disclosed in this Form 144?

The filing discloses that Sean Lie sold 21,257 shares for $4,720,625.00 on 08/18/2026 and 10,033 shares for $1,706,311.13 on 06/25/2026, all in Cerebras Systems Inc. common stock.

What does the filing say about Cerebras Systems Inc. (CBRS) shares outstanding?

The notice reports that Cerebras Systems Inc. had 112,247,109 shares outstanding of common stock as of 08/20/2026. This figure is provided in the securities information section related to the Form 144 filing.

How will the securities to be sold by Sean Lie in CBRS be acquired?

The filing states that the securities to be sold were or will be acquired upon the vesting of performance stock units during the period from 06/05/2026 through 08/22/2029, and that they are being acquired from the issuer.

Which broker is named in the Cerebras Systems Inc. (CBRS) Form 144?

The broker named is Morgan Stanley Smith Barney LLC Executive Financial Services, located at 1 New York Plaza, 8th Floor, New York, NY 10004. The filing associates this broker with the proposed sale of 710,247 shares of common stock.

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

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Accepted by SEC EDGAR 08/20/2026 - 05:00 PM EDT 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	0002132472
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	650-933-4980
Name of Person for Whose Account the Securities are To Be Sold	SEAN LIE
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	710247	153193175.43	112247109	08/20/2026	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	06/05/2026	Performance Stock Units	Issuer			710247	06/05/2026	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
SEAN LIE 1237 E. Arques Avenue Sunnyvale CA 94085	Common	08/18/2026	21257	4720625.00
SEAN LIE 1237 E. Arques Avenue Sunnyvale CA 94085	Common	06/25/2026	10033	1706311.13

144: Remarks and Signature

Remarks	The securities to be sold were or will be acquired upon the vesting of performance stock units during the period of 06/05/2026 through 08/22/2029.
Date of Notice	08/20/2026
Date of Plan Adoption or Giving of Instruction, If Relying on Rule 10b5-1	05/20/2026
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/ Sean Lie
ATTENTION: Intentional misstatements or omission of facts constitute Federal Criminal Violations (See 18 U.S.C. 1001)