X0609 4 2026-06-25 0 0002021728 Cerebras Systems Inc. CBRS 0001702410 Patel Yagnesh false C/O CEREBRAS SYSTEMS INC. 1237 E. ARQUES AVENUE SUNNYVALE CA 94085 0 1 0 0 Chief Accounting Officer 0 Class A Common Stock 2026-06-25 4 C 0 10079 A 10079 D Class A Common Stock 2026-06-25 4 S 0 107 162.71 D 9972 D Class A Common Stock 2026-06-25 4 S 0 215 164.19 D 9757 D Class A Common Stock 2026-06-25 4 S 0 161 166.01 D 9596 D Class A Common Stock 2026-06-25 4 S 0 228 166.98 D 9368 D Class A Common Stock 2026-06-25 4 S 0 269 169.11 D 9099 D Class A Common Stock 2026-06-25 4 S 0 107 171.66 D 8992 D Class A Common Stock 2026-06-25 4 S 0 54 175.74 D 8938 D Class A Common Stock 2026-06-25 4 S 0 54 179.80 D 8884 D Class A Common Stock 2026-06-25 4 S 0 54 180.93 D 8830 D Class A Common Stock 2026-06-25 4 S 0 54 182.38 D 8776 D Class A Common Stock 2026-06-25 4 S 0 107 183.60 D 8669 D Class A Common Stock 2026-06-25 4 S 0 215 184.96 D 8454 D Class A Common Stock 2026-06-25 4 S 0 54 189.36 D 8400 D Class A Common Stock 2026-06-25 4 S 0 193 162.45 D 8207 D Class A Common Stock 2026-06-25 4 S 0 185 164.19 D 8022 D Class A Common Stock 2026-06-25 4 S 0 269 165.85 D 7753 D Class A Common Stock 2026-06-25 4 S 0 796 166.93 D 6957 D Class A Common Stock 2026-06-25 4 S 0 663 168.59 D 6294 D Class A Common Stock 2026-06-25 4 S 0 239 169.21 D 6055 D Class A Common Stock 2026-06-25 4 S 0 993 171.57 D 5062 D Class A Common Stock 2026-06-25 4 S 0 200 172.33 D 4862 D Class A Common Stock 2026-06-25 4 S 0 100 173.91 D 4762 D Class A Common Stock 2026-06-25 4 S 0 46 175.74 D 4716 D Class A Common Stock 2026-06-25 4 S 0 100 178.50 D 4616 D Class A Common Stock 2026-06-25 4 S 0 46 179.80 D 4570 D Class A Common Stock 2026-06-25 4 S 0 46 180.93 D 4524 D Class A Common Stock 2026-06-25 4 S 0 46 182.38 D 4478 D Class A Common Stock 2026-06-25 4 S 0 93 183.60 D 4385 D Class A Common Stock 2026-06-25 4 S 0 385 185.01 D 4000 D Class B Common Stock 2026-06-25 4 C 0 10079 D Class A Common Stock 10079 120838 D The 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. These 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. The sale price reported in Column 4 of Table 1 represents the weighted average sale price of the shares sold ranging from $162.34 to $163.08, 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. The sale price reported in Column 4 of Table 1 represents the weighted average sale price of the shares sold ranging from $163.82 to $164.60, 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. The sale price reported in Column 4 of Table 1 represents the weighted average sale price of the shares sold ranging from $165.47 to $166.30, 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. The sale price reported in Column 4 of Table 1 represents the weighted average sale price of the shares sold ranging from $166.61 to $167.10, 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. The sale price reported in Column 4 of Table 1 represents the weighted average sale price of the shares sold ranging from $168.63 to $169.37, 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. The sale price reported in Column 4 of Table 1 represents the weighted average sale price of the shares sold ranging from $171.58 to $171.73, 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. The sale price reported in Column 4 of Table 1 represents the weighted average sale price of the shares sold ranging from $183.52 to $183.68, 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. The sale price reported in Column 4 of Table 1 represents the weighted average sale price of the shares sold ranging from $184.61 to $185.52, 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. The sale price reported in Column 4 of Table 1 represents the weighted average sale price of the shares sold ranging from $162.21 to $163.08, 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. The sale price reported in Column 4 of Table 1 represents the weighted average sale price of the shares sold ranging from $166.54 to $167.28, 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. The sale price reported in Column 4 of Table 1 represents the weighted average sale price of the shares sold ranging from $168.08 to $169.02, 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. The sale price reported in Column 4 of Table 1 represents the weighted average sale price of the shares sold ranging from $169.12 to $169.37, 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. The sale price reported in Column 4 of Table 1 represents the weighted average sale price of the shares sold ranging from $171.08 to $172.02, 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. The sale price reported in Column 4 of Table 1 represents the weighted average sale price of the shares sold ranging from $172.27 to $172.38, 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. The sale price reported in Column 4 of Table 1 represents the weighted average sale price of the shares sold ranging from $184.57 to $185.53, 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. This Form 4 is the first of two Forms 4 being filed by the Reporting Person relating to transactions that occurred on June 25, 2026 and June 26, 2026 (the "Transaction Dates"). Because there are more than 30 rows associated with the Reporting Person's transactions that occurred on the Transaction Dates, and EDGAR will not allow for the entry of more than 30 rows on a single Form 4, a second Form 4 is also filed to report the transactions that were not included on this first Form 4. The two Forms 4 filed by the Reporting Person on the date hereof should be read together as one consolidated filing. /s/ Robert Mills, Attorney-in-fact 2026-06-29