Changes in Beneficial Ownership · 4

Cerebras Systems Inc.

CBRSNASDAQEQUITYCurrent

Changes in Beneficial Ownership

Filed Oct 2, 2026Accepted Oct 2, 2026, 4:21 PM EDTFiling CIK 2021728Accession 0001193125-26-412337

ownership.xml

Name: Susan Lior
Reporting owner CIK: 0001832895
Relationship: Director
Address: C/O CEREBRAS SYSTEMS INC., 1237 E. ARQUES AVENUE, SUNNYVALE, CA, 94085

Non-derivative transactions · 3 reported rows
Security	Transaction date	Code	Amount	A / D	Price (USD)	Owned after	Ownership	Nature of ownership
Class A Common Stock	2026-09-30	J · Form 4^[F1]	1,198,489	D	^[F1]	5,292,222	I	See footnote^[F2]
Class A Common Stock	2026-09-30	J · Form 4^[F3]	68,428	A	^[F3]	420,355	D
Class A Common Stock	2026-09-30	J · Form 4^[F3]	63,056	A	^[F3]	372,659	I	See footnote^[F4]

Table key

F1: Represents a pro-rata, in-kind distribution by the Eclipse Entities (as defined below) to its partners, for no additional consideration (the "Distribution").↩ 1 ↩ 2
F2: Following the distribution, consists of (i) 314,543 shares of Class A common stock held by Eclipse Continuity Fund I, L.P. ("Eclipse Continuity Fund"); (ii) 2,573,548 shares of Class A common stock held by Eclipse SPV II, L.P. ("Eclipse SPV II"); (iii) 235,755 shares of Class A common stock held by Eclipse SPV XIII, L.P. ("Eclipse SPV XIII"); and (iv) 2,168,376 shares of Class A common stock held by Eclipse Ventures Fund I, L.P. ("Eclipse Fund," and together with Eclipse Continuity Fund, Eclipse SPV II, and Eclipse SPV XIII, "Eclipse Entities"). The Reporting Person is the sole managing member of the general partner of each of the Eclipse Entities and may be deemed to have voting, investment, and dispositive power with respect to the shares held by such entities.↩ 1
F3: The shares were obtained pursuant to a pro-rata, in-kind distribution from the Eclipse Entities, for no additional consideration.↩ 1 ↩ 2 ↩ 3 ↩ 4
F4: The shares are held directly by an estate-planning vehicle which is controlled by the Reporting Person.↩ 1