Form 4 for CBRS Cerebras Systems Inc.
Accepted 2026-08-25 18:13:47 ET · period of report 2026-08-21 · accession 0001628280-26-058961 · SEC index · Original document
Summary rows
Aggregated the way they appear in lists: one row per insider, transaction code and security table.
| X | Filed | Traded | Ticker | Insider | Title | Type | Price | Qty | Owned | ΔOwn | Value |
|---|---|---|---|---|---|---|---|---|---|---|---|
| D | 2026-08-25 18:13 | 2026-08-21 | CBRS | Feldman Andrew D. | CEO, Pres, Dir | G - Gift | — | -50.0K | 16.9K | -75% | — |
| D | 2026-08-25 18:13 | 2026-08-21 | CBRS | Feldman Andrew D. | CEO, Pres, Dir | C - Cnv Deriv | $0.00 | +237.6K | 254.4K | +1,410% | $0 |
| DM | 2026-08-25 18:13 | 2026-08-21 | CBRS | Feldman Andrew D. | CEO, Pres, Dir | S - Sale | $199.27 | -237.6K | 16.9K | -93% | -$47.34M |
| DI | 2026-08-25 18:13 | 2026-08-24 | CBRS | Feldman Andrew D. | CEO, Pres, Dir | J - Other | $0.00 | +120 | 686 | +21% | $0 |
| DM | 2026-08-25 18:13 | 2026-08-21 | CBRS | Feldman Andrew D. | CEO, Pres, Dir | M - OptEx | $0.00 | 0 | 14.18M | New | $0 |
| D | 2026-08-25 18:13 | 2026-08-21 | CBRS | Feldman Andrew D. | CEO, Pres, Dir | C - Cnv Deriv | $0.00 | -237.6K | 13.95M | -2% | $0 |
Purchase Sale Sale after option exercise All abbreviations
Every reported transaction
| # | Table | Security | Date | Code | A/D | Shares | Price | Owned after | Own | Exercise / expiry | Underlying | Footnotes |
|---|---|---|---|---|---|---|---|---|---|---|---|---|
| 1 | Common | Class A Common Stock | 2026-08-21 | G | D | 50,000 | — | 16,853 | D | — | — | (F1) The 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. (F2) 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. (F2) 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. |
| 2 | Common | Class A Common Stock | 2026-08-21 | C | A | 237,559 | $0.00 | 254,412 | D | — | — | (F2) 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. (F2) 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. |
| 3 | Common | Class A Common Stock | 2026-08-21 | S | D | 43,553 | $196.20 | 210,859 | D | — | — | (F3) The 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. (F4) The 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. |
| 4 | Common | Class A Common Stock | 2026-08-21 | S | D | 21,307 | $197.45 | 189,552 | D | — | — | (F3) The 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. (F5) The 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. |
| 5 | Common | Class A Common Stock | 2026-08-21 | S | D | 32,864 | $198.18 | 156,688 | D | — | — | (F3) The 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. (F6) The 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. |
| 6 | Common | Class A Common Stock | 2026-08-21 | S | D | 66,237 | $199.33 | 90,451 | D | — | — | (F3) The 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. (F7) The 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. |
| 7 | Common | Class A Common Stock | 2026-08-21 | S | D | 33,575 | $200.13 | 56,876 | D | — | — | (F3) The 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. (F8) The 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. |
| 8 | Common | Class A Common Stock | 2026-08-21 | S | D | 8,832 | $201.12 | 48,044 | D | — | — | (F3) The 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. (F9) The 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. |
| 9 | Common | Class A Common Stock | 2026-08-21 | S | D | 6,699 | $202.28 | 41,345 | D | — | — | (F3) The 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. (F10) The 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. |
| 10 | Common | Class A Common Stock | 2026-08-21 | S | D | 12,092 | $203.37 | 29,253 | D | — | — | (F3) The 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. (F11) The 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. |
| 11 | Common | Class A Common Stock | 2026-08-21 | S | D | 4,800 | $204.44 | 24,453 | D | — | — | (F3) The 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. (F12) The 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. |
| 12 | Common | Class A Common Stock | 2026-08-21 | S | D | 1,600 | $205.32 | 22,853 | D | — | — | (F3) The 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. (F13) The 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. |
| 13 | Common | Class A Common Stock | 2026-08-21 | S | D | 1,400 | $207.28 | 21,453 | D | — | — | (F3) The 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. (F14) The 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. |
| 14 | Common | Class A Common Stock | 2026-08-21 | S | D | 4,594 | $208.86 | 16,859 | D | — | — | (F3) The 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. (F15) The 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. |
| 15 | Common | Class A Common Stock | 2026-08-21 | S | D | 6 | $210.21 | 16,853 | D | — | — | (F3) The 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. |
| 16 | Common | Class A Common Stock | 2026-08-24 | J | A | 120 | $0.00 | 686 | I By Feldman Bravo Family Trust | — | — | (F16) Represents a pro-rata, in-kind distribution not for additional consideration. |
| 17 | Derivative | Stock Option | 2026-08-21 | M | D | 62,674 | $0.00 | 87,326 | D | $5.02 · — to 2033-02-13 | 62,674 Class B Common Stock | (F17) The stock option vests in 48 substantially equal monthly installments beginning on February 1, 2023. |
| 18 | Derivative | Stock Option | 2026-08-21 | M | D | 137,326 | $0.00 | 12,674 | D | $7.89 · — to 2032-01-11 | 137,326 Class B Common Stock | (F18) The stock option is fully vested and exercisable. |
| 19 | Derivative | Stock Option | 2026-08-21 | M | D | 37,559 | $0.00 | 562,441 | D | $2.72 · — to 2030-12-07 | 37,559 Class B Common Stock | (F18) The stock option is fully vested and exercisable. |
| 20 | Derivative | Class B Common Stock | 2026-08-21 | M | A | 237,559 | $0.00 | 14,182,693 | D | — · — to — | 237,559 Class A Common Stock | (F2) 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. (F2) 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. (F2) 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. |
| 21 | Derivative | Class B Common Stock | 2026-08-21 | C | D | 237,559 | $0.00 | 13,945,134 | D | — · — to — | 237,559 Class A Common Stock | (F2) 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. (F2) 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. (F2) 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. |