Form 4 for CBRS Cerebras Systems Inc.
Accepted 2026-09-08 20:19:04 ET · period of report 2026-09-04 · accession 0001628280-26-060988 · 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 | 2026-09-08 20:19 | 2026-09-04 | CBRS | Lie Sean | CTO | C - Cnv Deriv | — | +46.1K | 415.1K | +13% | — |
| D | 2026-09-08 20:19 | 2026-09-04 | CBRS | Lie Sean | CTO | G - Gift | $0.00 | -16.0K | 399.0K | -4% | $0 |
| D | 2026-09-08 20:19 | 2026-09-04 | CBRS | Lie Sean | CTO | S - Sale | $210.16 | -53.5K | 345.6K | -13% | -$11.24M |
| DM | 2026-09-08 20:19 | 2026-09-04 | CBRS | Lie Sean | CTO | M - OptEx | $0.00 | 0 | 7.63M | New | $0 |
| D | 2026-09-08 20:19 | 2026-09-04 | CBRS | Lie Sean | CTO | C - Cnv Deriv | $0.00 | -46.1K | 7.58M | -0.6% | $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 | 2026-09-04 | C | A | 46,141 | — | 415,067 | D | — | — | (F1) 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. (F1) 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 | 2026-09-04 | G | D | 16,038 | $0.00 | 399,029 | D | — | — | (F2) The reporting person transferred 16,038 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. |
| 3 | Common | Class A Common Stock | 2026-09-04 | S | D | 53,460 | $210.16 | 345,569 | 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 $210.00 to $210.45, 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 | Derivative | Stock Option | 2026-09-04 | M | D | 46,141 | $0.00 | 289,021 | D | $5.48 · — to 2034-02-06 | 46,141 Class B Common Stock | (F5) The stock option vests in 48 substantially equal monthly installments beginning on February 1, 2024. |
| 5 | Derivative | Class B Common Stock | 2026-09-04 | M | A | 46,141 | $0.00 | 7,629,133 | D | — · — to — | 46,141 Class A Common Stock | (F1) 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. (F1) 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. (F1) 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. (F1) 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. |
| 6 | Derivative | Class B Common Stock | 2026-09-04 | C | D | 46,141 | $0.00 | 7,582,992 | D | — · — to — | 46,141 Class A Common Stock | (F1) 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. (F1) 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. (F1) 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. |