X0609 4 2026-05-15 0 0002021728 Cerebras Systems Inc. CBRS 0001832895 Susan Lior false C/O CEREBRAS SYSTEMS INC. 1237 E. ARQUES AVENUE SUNNYVALE CA 94085 1 0 1 0 0 Class A Common Stock 2026-05-15 4 J 0 1093998 D 0 I See footnotes Class B Common Stock 2026-05-15 4 J 0 1093998 A Class A Common Stock 1093998 1093998 I See footnotes Series A Preferred Stock 2026-05-15 4 C 0 4419405 D Class B Common Stock 4419405 0 I See footnotes Series B Preferred Stock 2026-05-15 4 C 0 599465 D Class B Common Stock 599465 0 I See footnotes Series C Preferred Stock 2026-05-15 4 C 0 486175 D Class B Common Stock 486175 0 I See footnotes Series D Preferred Stock 2026-05-15 4 C 0 309678 D Class B Common Stock 309678 0 I See footnotes Series E Preferred Stock 2026-05-15 4 C 0 6548466 D Class B Common Stock 6548466 0 I See footnotes Series F Preferred Stock 2026-05-15 4 C 0 9010 D Class B Common Stock 9010 0 I See footnotes Class B Common Stock 2026-05-15 4 C 0 12372199 A Class A Common Stock 12372199 13466197 I See footnotes Immediately prior to the closing of the Issuer's initial public offering, each share of Class A common stock was reclassified, and each share of the Issuer's redeemable convertible preferred stock automatically converted and was reclassified, into one share of Class B Common Stock in an exempt transaction pursuant to Rule 16b-7. Each share of Class B common stock is convertible at any time at the option of the holder into one share of Class A common stock. Consists of (i) 486,175 shares of Class B common stock underlying Series C Preferred Stock, 309,678 shares of Class B common stock underlying Series D Preferred Stock, and 4,505 shares of Class B common stock underlying Series F Preferred Stock held by Eclipse Continuity Fund I, L.P. ("Eclipse Continuity Fund"); (ii) 6,548,466 shares of Class B common stock underlying Series E Preferred Stock held by Eclipse SPV II, L.P. ("Eclipse SPV II"); (iii) 599,880 shares of Class B common stock held by Eclipse SPV XIII, L.P. ("Eclipse SPV XIII"); and (iv) 494,118 shares of Class B common stock, 4,419,405 shares of Class B common stock underlying Series A Preferred Stock, 599,465 shares of Class B common stock underlying Series B Preferred Stock, and 4,505 shares of Class B common stock underlying Series F Preferred 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. Following the transactions reported herein, consists of (i) 800,358 shares of Class B common stock held by Eclipse Continuity Fund, (ii) 6,548,466 shares of Class B common stock held by Eclipse SPV II, (iii) 599,880 shares of Class B common stock held by Eclipse SPV XIII, and (iv) 5,517,493 shares of Class B common stock held by Eclipse Fund. /s/ Shirley Li, Attorney-in-Fact 2026-05-15