SEC Form 4 · accession 0001628280-26-046031

Cerebras Systems Inc. · CBRS

Statement of changes in beneficial ownership, as filed. Original on EDGAR ↗

Reporting owner

Sean Lie

Officer — Chief Technology Officer

Period of report

Jun 25, 2026

Accepted (ET)

Jun 29, 2026 · 4:47 pm EDT

Rule 10b5-1 plan

box not checked

Issuer CIK

0002021728

Table I — non-derivative securities

Security	Date	Code	Shares	Price	A/D	Owned after	D/I
Class A Common Stock^F1	Jun 25, 2026	C	10,033	—	A	10,033	D
Class A Common Stock^F2,F3	Jun 25, 2026	S	2,534	$165.21	D	7,499	D
Class A Common Stock^F2,F4	Jun 25, 2026	S	3,353	$165.43	D	4,146	D
Class A Common Stock^F2,F5	Jun 25, 2026	S	922	$168.80	D	3,224	D
Class A Common Stock^F2,F6	Jun 25, 2026	S	400	$169.62	D	2,824	D
Class A Common Stock^F2,F7	Jun 25, 2026	S	110	$170.57	D	2,714	D
Class A Common Stock^F2,F8	Jun 25, 2026	S	263	$171.78	D	2,451	D
Class A Common Stock^F2,F9	Jun 25, 2026	S	200	$173.16	D	2,251	D
Class A Common Stock^F2	Jun 25, 2026	S	100	$175.57	D	2,151	D
Class A Common Stock^F2,F10	Jun 25, 2026	S	242	$178.66	D	1,909	D
Class A Common Stock^F2,F11	Jun 25, 2026	S	300	$180.12	D	1,609	D
Class A Common Stock^F2,F12	Jun 25, 2026	S	200	$181.20	D	1,409	D
Class A Common Stock^F2,F13	Jun 25, 2026	S	200	$182.57	D	1,209	D
Class A Common Stock^F2,F14	Jun 25, 2026	S	300	$183.71	D	909	D
Class A Common Stock^F2,F15	Jun 25, 2026	S	705	$184.80	D	204	D
Class A Common Stock^F2	Jun 25, 2026	S	100	$185.51	D	104	D
Class A Common Stock^F2	Jun 25, 2026	S	104	$186.51	D	0	D

Table II — derivative securities

Security	Conv. / exercise price	Date	Code	Shares	A/D	Exercisable	Expires	Underlying	Underlying shares	Owned after	D/I
Class B Common Stock^F1	—	Jun 25, 2026	C	10,033	D	—	—	Class A Common Stock	10,033	8,199,698	D
Class B Common Stock^F1	—	holding	—	—	—	—	—	Class A Common Stock	180,600	180,600	I

Explanation of responses

F1The 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.
F10The sale price reported in Column 4 of Table 1 represents the weighted average sale price of the shares sold ranging from $178.47 to $178.70, inclusive. Upon request by the staff of the Securities and Exchange commission, the Issuer, or a security holder of the Issuer, the Reporting Person will provide full information regarding the number of shares sold at each separate price.
F11The sale price reported in Column 4 of Table 1 represents the weighted average sale price of the shares sold ranging from $179.60 to $180.51, inclusive. Upon request by the staff of the Securities and Exchange commission, the Issuer, or a security holder of the Issuer, the Reporting Person will provide full information regarding the number of shares sold at each separate price.
F12The sale price reported in Column 4 of Table 1 represents the weighted average sale price of the shares sold ranging from $181.18 to $181.21, inclusive. Upon request by the staff of the Securities and Exchange commission, the Issuer, or a security holder of the Issuer, the Reporting Person will provide full information regarding the number of shares sold at each separate price.
F13The sale price reported in Column 4 of Table 1 represents the weighted average sale price of the shares sold ranging from $182.28 to $182.86, inclusive. Upon request by the staff of the Securities and Exchange commission, the Issuer, or a security holder of the Issuer, the Reporting Person will provide full information regarding the number of shares sold at each separate price.
F14The sale price reported in Column 4 of Table 1 represents the weighted average sale price of the shares sold ranging from $183.51 to $184.11, inclusive. Upon request by the staff of the Securities and Exchange commission, the Issuer, or a security holder of the Issuer, the Reporting Person will provide full information regarding the number of shares sold at each separate price.
F15The sale price reported in Column 4 of Table 1 represents the weighted average sale price of the shares sold ranging from $184.51 to $185.24, inclusive. Upon request by the staff of the Securities and Exchange commission, the Issuer, or a security holder of the Issuer, the Reporting Person will provide full information regarding the number of shares sold at each separate price.
F2These shares were sold by the Reporting Person to cover tax withholding obligations in connection with the settlement of restricted stock units, resulting in the automatic conversion of the shares into Class A Common Stock immediately prior to execution of the sale. The sale was to satisfy tax withholding obligations to be funded by a "sell to cover" transaction and does not represent a discretionary transaction by the Reporting Person. The Reporting Person is subject to a lock-up agreement that that was entered into with underwriters in connection with the Issuer's initial public offering and expires on the earlier of (i) 6:00 a.m. Eastern Time on the second trading day following the Issuer's release of earnings for the quarter ending September 30, 2026 or (ii) November 9, 2026. The sale of shares is a permissible exemption under the terms of the lock-up agreement.
F3The sale price reported in Column 4 of Table 1 represents the weighted average sale price of the shares sold ranging from $165.11 to $165.66, inclusive. Upon request by the staff of the Securities and Exchange commission, the Issuer, or a security holder of the Issuer, the Reporting Person will provide full information regarding the number of shares sold at each separate price.
F4The sale price reported in Column 4 of Table 1 represents the weighted average sale price of the shares sold ranging from $167.17 to $167.82, inclusive. Upon request by the staff of the Securities and Exchange commission, the Issuer, or a security holder of the Issuer, the Reporting Person will provide full information regarding the number of shares sold at each separate price.
F5The sale price reported in Column 4 of Table 1 represents the weighted average sale price of the shares sold ranging from $168.28 to $169.25, inclusive. Upon request by the staff of the Securities and Exchange commission, the Issuer, or a security holder of the Issuer, the Reporting Person will provide full information regarding the number of shares sold at each separate price.
F6The sale price reported in Column 4 of Table 1 represents the weighted average sale price of the shares sold ranging from $169.32 to $170.20, inclusive. Upon request by the staff of the Securities and Exchange commission, the Issuer, or a security holder of the Issuer, the Reporting Person will provide full information regarding the number of shares sold at each separate price.
F7The sale price reported in Column 4 of Table 1 represents the weighted average sale price of the shares sold ranging from $170.40 to $170.59, inclusive. Upon request by the staff of the Securities and Exchange commission, the Issuer, or a security holder of the Issuer, the Reporting Person will provide full information regarding the number of shares sold at each separate price.
F8The sale price reported in Column 4 of Table 1 represents the weighted average sale price of the shares sold ranging from $171.74 to $171.88, inclusive. Upon request by the staff of the Securities and Exchange commission, the Issuer, or a security holder of the Issuer, the Reporting Person will provide full information regarding the number of shares sold at each separate price.
F9The sale price reported in Column 4 of Table 1 represents the weighted average sale price of the shares sold ranging from $173.01 to $173.30, inclusive. Upon request by the staff of the Securities and Exchange commission, the Issuer, or a security holder of the Issuer, the Reporting Person will provide full information regarding the number of shares sold at each separate price.