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  4. [144] Cerebras Systems Inc. SEC Filing

Cerebras (NASDAQ: CBRS) insider logs $147M sale, plans more

Filing Impact
(Neutral)
Filing Sentiment
(Neutral)
Form Type
144

Rhea-AI Filing Summary

Cerebras Systems Inc. (CBRS) insider Sean Lie filed a notice of proposed sale under Rule 144 for up to 16,293 shares of common stock. The shares are to be issued upon the exercise of stock options for cash on or after 08/21/2026, with Morgan Stanley Smith Barney LLC listed as broker.

The filing also lists prior sales of Cerebras common stock during the past three months, including 710,247 shares sold for $147,629,203.38 on 08/20/2026 under a 10b5-1 trading plan, and additional sales of 21,257 shares and 10,955 shares for disclosed aggregate amounts.

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Shares proposed for sale 16,293 shares Common stock under Rule 144, proposed sale date 08/21/2026
Aggregate market value for proposed sale $3,419,086.05 Associated with 16,293 shares of common stock listed in the filing
Shares sold 08/20/2026 710,247 shares Common stock sold under 10b5-1 plan during past 3 months
Aggregate proceeds 08/20/2026 $147,629,203.38 For 710,247 shares of common stock sold
Shares sold 08/18/2026 21,257 shares Common stock sale disclosed in past 3 months section
Aggregate proceeds 08/18/2026 $4,720,625.00 For 21,257 shares of common stock sold
Shares sold 06/25/2026 10,955 shares Common stock sale disclosed in past 3 months section
Aggregate proceeds 06/25/2026 $1,861,944.73 For 10,955 shares of common stock sold
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.
10b5-1 regulatory
"10b5-1 Sales for SEAN LIE 1237 E. Arques Avenue Sunnyvale CA 94085"
A 10b5-1 plan is a pre-set schedule that lets company insiders buy or sell shares according to written instructions made when they do not possess material, nonpublic information. Think of it as a timed automatic payment for stock trades: it helps insiders avoid accusations of trading on secret information and gives outside investors a clearer signal about whether sales are routine or potentially informative about the company’s prospects.
Exercise of Stock Options financial
"Common | 08/21/2026 | Exercise of Stock Options | Issuer"
Aggregate market value financial
"| 16293 | 3419086.05 | 112247109 | 08/21/2026 | NASDAQ"
Aggregate market value is the combined price you would pay to buy all outstanding shares of a company or all companies in a group at current market prices — essentially the sum of each stock’s market capitalization. It matters to investors because it shows the overall size and weight of an investment or sector (like the total cost to buy every piece of a puzzle), helps compare scale across companies or markets, and influences index composition and risk exposure.

FAQ

What does the Form 144 filing by Sean Lie mean for CBRS stock?
The filing states that Sean Lie may sell up to 16,293 shares of Cerebras Systems Inc. (CBRS) common stock under Rule 144, from options exercised for cash on or after 08/21/2026, through Morgan Stanley Smith Barney LLC.

How many CBRS shares is Sean Lie planning to sell under this Form 144?
The notice covers a proposed sale of up to 16,293 shares of Cerebras Systems Inc. common stock. These shares are tied to the exercise of stock options for cash with a planned date of 08/21/2026.

Which broker is handling the potential CBRS share sale for Sean Lie?
The broker listed is Morgan Stanley Smith Barney LLC Executive Financial Services, located at 1 New York Plaza, New York. The filing associates this broker with the proposed sale of 16,293 shares of Cerebras common stock on NASDAQ.

What CBRS shares has Sean Lie sold in the past three months?
Disclosed past 3‑month sales include 710,247 shares for $147,629,203.38 on 08/20/2026 under a 10b5-1 plan, 21,257 shares for $4,720,625.00 on 08/18/2026, and 10,955 shares for $1,861,944.73 on 06/25/2026.

What is the nature of the CBRS securities in Sean Lie’s Form 144?
The securities are common stock of Cerebras Systems Inc., identified with CUSIP 112247109, to be issued upon the exercise of stock options for cash, with the proposed sale date of 08/21/2026 on NASDAQ.

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

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144: Filer Information

144: Issuer Information

144: Securities Information



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


* 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

144: Remarks and Signature

Source: View Original Filing on SEC EDGAR