SEC Form 4 · accession 0001628280-26-058961

Cerebras Systems Inc. · CBRS

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

Reporting owner

Andrew D. Feldman

Officer — CEO, President · Director

Period of report

Aug 21, 2026

Accepted (ET)

Aug 25, 2026 · 6:13 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	Nature of ownership
Class A Common Stock^F2	Aug 21, 2026	G	50,000	—	D	16,853	D
Class A Common Stock^F2	Aug 21, 2026	C	237,559	$0.00	A	254,412	D
Class A Common Stock^F4	Aug 21, 2026	S	43,553	$196.20	D	210,859	D
Class A Common Stock^F5	Aug 21, 2026	S	21,307	$197.45	D	189,552	D
Class A Common Stock^F6	Aug 21, 2026	S	32,864	$198.18	D	156,688	D
Class A Common Stock^F7	Aug 21, 2026	S	66,237	$199.33	D	90,451	D
Class A Common Stock^F8	Aug 21, 2026	S	33,575	$200.13	D	56,876	D
Class A Common Stock^F9	Aug 21, 2026	S	8,832	$201.12	D	48,044	D
Class A Common Stock^F10	Aug 21, 2026	S	6,699	$202.28	D	41,345	D
Class A Common Stock^F11	Aug 21, 2026	S	12,092	$203.37	D	29,253	D
Class A Common Stock^F12	Aug 21, 2026	S	4,800	$204.44	D	24,453	D
Class A Common Stock^F13	Aug 21, 2026	S	1,600	$205.32	D	22,853	D
Class A Common Stock^F14	Aug 21, 2026	S	1,400	$207.28	D	21,453	D
Class A Common Stock^F15	Aug 21, 2026	S	4,594	$208.86	D	16,859	D
Class A Common Stock	Aug 21, 2026	S	6	$210.21	D	16,853	D
Class A Common Stock	Aug 24, 2026	J	120	$0.00	A	686	I	By Feldman Bravo Family Trust

Table II — derivative securities

Security	Conv. / exercise price	Date	Code	Shares	A/D	Exercisable	Expires	Underlying	Underlying shares	Owned after	D/I
Stock Option^F17	$5.02	Aug 21, 2026	M	62,674	D	—	Feb 13, 2033	Class B Common Stock	62,674	87,326	D
Stock Option^F18	$7.89	Aug 21, 2026	M	137,326	D	—	Jan 11, 2032	Class B Common Stock	137,326	12,674	D
Stock Option^F18	$2.72	Aug 21, 2026	M	37,559	D	—	Dec 7, 2030	Class B Common Stock	37,559	562,441	D
Class B Common Stock^F2	—	Aug 21, 2026	M	237,559	A	—	—	Class A Common Stock	237,559	14,182,693	D
Class B Common Stock^F2	—	Aug 21, 2026	C	237,559	D	—	—	Class A Common Stock	237,559	13,945,134	D
Class B Common Stock^F2	—	holding	—	—	—	—	—	Class A Common Stock	50,000	50,000	I
Class B Common Stock^F2	—	holding	—	—	—	—	—	Class A Common Stock	50,000	50,000	I

Explanation of responses

F1The reporting person transferred 50,000 shares of the Issuer's common stock to a donor-advised fund sponsored by a charitable organization under Section 501(c)(3) of the Internal Revenue Code.
F10The sale price reported in Column 4 of Table 1 represents the weighted average sale price of the shares sold ranging from $201.86 to $202.83, 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 $202.90 to $203.87, 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 $203.92 to $204.87, 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 $204.96 to $205.67, 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 $206.81to $207.59, 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.
F15The sale price reported in Column 4 of Table 1 represents the weighted average sale price of the shares sold ranging from $208.42 to $209.00, 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.
F16Represents a pro-rata, in-kind distribution not for additional consideration.
F17The stock option vests in 48 substantially equal monthly installments beginning on February 1, 2023.
F18The stock option is fully vested and exercisable.
F2The 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.
F3The sale reported on this Form 4 represents shares sold by the Reporting Person pursuant to a Rule 10b5-1 trading plan adopted by the Reporting Person on May 20, 2026.
F4The sale price reported in Column 4 of Table 1 represents the weighted average sale price of the shares sold ranging from $195.75 to $196.74, 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 $196.75 to $197.74, 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 $197.75 to $198.74, 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 $198.75 to $199.74, 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 $199.75 to $200.74, 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 $200.75 to $201.72, 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.