X0609 4 2026-06-24 0002021728 Cerebras Systems Inc. CBRS 0001567929 Vassallo Steven false C/O FOUNDATION CAPITAL 550 HIGH STREET, 3RD FLOOR PALO ALTO CA 94301 true false false false 0 Class A Common Stock 2026-06-24 4 C 0 1391131 A 1391131 I By Foundation Capital VIII, L.P. Class A Common Stock 2026-06-24 4 C 0 29963 A 29963 I By Foundation Capital VIII Principals Fund, LLC Class A Common Stock 2026-06-24 4 C 0 109141 A 109141 I By Foundation Capital Leadership Fund II, L.P. Class A Common Stock 2026-08-14 4 C 0 347782 A 1738913 I By Foundation Capital VIII, L.P. Class A Common Stock 2026-08-14 4 C 0 7490 A 37453 I By Foundation Capital VIII Principals Fund, L.L.C. Class A Common Stock 2026-08-14 4 C 0 27285 A 136426 I By Foundation Capital Leadership Fund II, L.P. Class A Common Stock 2026-08-14 4 J 0 1738913 0 D 0 I By Foundation Capital VIII, L.P. Class A Common Stock 2026-08-14 4 J 0 37453 0 D 0 I By Foundation Capital VIII Principals Fund, L.L.C. Class A Common Stock 2026-08-14 4 J 0 136426 0 D 0 I By Foundation Capital Leadership Fund II, L.P. Class A Common Stock 2026-08-14 4 J 0 449885 0 A 449885 I By Foundation Capital Management Co. VIII, L.L.C. Class A Common Stock 2026-08-14 4 J 0 449885 0 D 0 I By Foundation Capital Management Co. VIII, L.L.C. Class A Common Stock 2026-08-14 4 J 0 1368 0 A 1368 I By Foundation Capital Management Co. LF II, L.L.C. Class A Common Stock 2026-08-14 4 J 0 99599 0 A 99599 I By Revocable Trust Class A Common Stock 2026-08-14 4 J 0 50944 0 A 50944 I By Irrevocable Trust Class A Common Stock 2026-08-14 4 S 0 6081 216.38 D 93518 I By Revocable Trust Class A Common Stock 2026-08-14 4 S 0 16671 217.47 D 76847 I By Revocable Trust Class A Common Stock 2026-08-14 4 S 0 11834 218.46 D 65013 I By Revocable Trust Class A Common Stock 2026-08-14 4 S 0 14323 219.41 D 50690 I By Revocable Trust Class A Common Stock 2026-08-14 4 S 0 1091 219.97 D 49599 I By Revocable Trust Class B Common Stock 2026-06-24 4 C 0 1391131 D Class A Common Stock 1391131 12520174 I By Foundation Capital VIII, L.P. Class B Common Stock 2026-06-24 4 C 0 29963 D Class A Common Stock 29963 269664 I By Foundation Capital VIII Principals Fund, LLC Class B Common Stock 2026-06-24 4 C 0 109141 D Class A Common Stock 109141 982270 I By Foundation Capital Leadership Fund II, L.P. Class B Common Stock 2026-08-14 4 C 0 347782 D Class A Common Stock 347782 12172392 I By Foundation Capital VIII, L.P. Class B Common Stock 2026-08-14 4 C 0 7490 D Class A Common Stock 7490 262174 I By Foundation Capital VIII Principals Fund, LLC Class B Common Stock 2026-08-14 4 C 0 27285 D Class A Common Stock 27285 954985 I By Foundation Capital Leadership Fund II, L.P. Each share of Class B Common Stock was converted into one share of Class A Common Stock for no additional consideration. Securities are directly held by Foundation Capital VIII, L.P. ("FC8"). Foundation Capital Management Co. VIII, L.L.C. ("FCM8") is the general partner of FC8. The Reporting Person is a manager of FCM8 and may be deemed to beneficially own such shares. The Reporting Person disclaims beneficial ownership of the securities reported herein, except to the extent of his pecuniary interest therein. Securities are directly held by Foundation Capital VIII Principals Fund, L.L.C. ("FC8P"). Foundation Capital Management Co. VIII, L.L.C. ("FCM8") is the manager of FC8P. The Reporting Person is a manager of FCM8 and may be deemed to beneficially own such shares. The Reporting Person disclaims beneficial ownership of the securities reported herein, except to the extent of his pecuniary interest therein. Securities are directly held by Foundation Capital Leadership Fund II, L.P. ("FCLF2"). Foundation Capital Management Co. LF II, L.L.C. ("FCMLF2") is the general partner of FCLF2. The Reporting Person is a manager of FCMLF2 and may be deemed to beneficially own such shares. The Reporting Person disclaims beneficial ownership of the securities reported herein, except to the extent of his pecuniary interest therein. Represents a pro rata, in-kind distribution, and not a purchase or sale of securities, by FC8 to its general partner and limited partners without additional consideration. Represents a pro rata, in-kind distribution, and not a purchase or sale of securities, by FC8P to its general partner and limited partners without additional consideration. Represents a pro rata, in-kind distribution, and not a purchase or sale of securities, by FCLF2 to its general partner and limited partners without additional consideration. Represents receipt of shares in the distributions in kind described in footnotes (5) and (6). Securities are directly held by FCM8. The Reporting Person is a manager of FCM8 and may be deemed to beneficially own such shares. The Reporting Person disclaims beneficial ownership of the securities reported herein, except to the extent of his pecuniary interest therein. Represents a pro rata, in-kind distribution, and not a purchase or sale of securities, by FCM8 to its members without additional consideration. Represents receipt of shares in the distribution in kind described in footnote (7). Securities are directly held by FCMLF2. The Reporting Person is a manager of FCMLF2 and may be deemed to beneficially own such shares. The Reporting Person disclaims beneficial ownership of the securities reported herein, except to the extent of his pecuniary interest therein. Represents receipt of shares in the distributions in kind described in footnotes (6) and (10). The securities are held by a revocable family trust, of which the Reporting Person is a co-trustee. The Reporting Person disclaims beneficial ownership of such shares except to the extent of his proportionate pecuniary interest therein. Represents receipt of shares in the distribution in kind described in footnote (10). The securities are held by an irrevocable GST trust, of which the Reporting Person is a co-trustee. The Reporting Person disclaims beneficial ownership of these shares except to the extent of his pecuniary interest therein. The price reported in Column 4 is a weighted average price. These securities were sold in multiple transactions at prices ranging from $215.79 to $216.78 inclusive. The Reporting Person undertakes to provide to the Issuer, any security holder of the Issuer, or the staff of the Securities and Exchange Commission, upon request, full information regarding the number of securities sold at each separate price within the range set forth in this footnote. The price reported in Column 4 is a weighted average price. These securities were sold in multiple transactions at prices ranging from $216.87 to $217.86 inclusive. The Reporting Person undertakes to provide to the Issuer, any security holder of the Issuer, or the staff of the Securities and Exchange Commission, upon request, full information regarding the number of securities sold at each separate price within the range set forth in this footnote. The price reported in Column 4 is a weighted average price. These securities were sold in multiple transactions at prices ranging from $217.90 to $218.89 inclusive. The Reporting Person undertakes to provide to the Issuer, any security holder of the Issuer, or the staff of the Securities and Exchange Commission, upon request, full information regarding the number of securities sold at each separate price within the range set forth in this footnote. The price reported in Column 4 is a weighted average price. These securities were sold in multiple transactions at prices ranging from $218.90 to $219.89 inclusive. The Reporting Person undertakes to provide to the Issuer, any security holder of the Issuer, or the staff of the Securities and Exchange Commission, upon request, full information regarding the number of securities sold at each separate price within the range set forth in this footnote. The price reported in Column 4 is a weighted average price. These securities were sold in multiple transactions at prices ranging from $219.90 to $220.15 inclusive. The Reporting Person undertakes to provide to the Issuer, any security holder of the Issuer, or the staff of the Securities and Exchange Commission, upon request, full information regarding the number of securities sold at each separate price within the range set forth in this footnote. Each share of Class B Common Stock is convertible into one share of Class A Common Stock at any time at the option of the holder and does not expire. /s/ Steven Vassallo 2026-08-18