Lie Sean's Form 4 filing
Cerebras Systems Inc.CBRS · filed Aug 21, 2026
- Accession no.
- 0001628280-26-058506
- Filed
- Aug 21, 2026, 8:58 PM ET
- Trade date
- Aug 20-21, 2026
- Filing delay
- 1 day
- Rule 10b5-1 plan
- Not checked
This filing lists 14 non-derivative transactions and 10 derivative transactions. Open-market sales total $151.1M. It was filed 1 day after the trade.
Reporting owners
A Form 4 can have several reporting owners, such as a person and a fund they control. Trade tables show the first one.
| Owner | Relationship to the company |
|---|---|
| Lie SeanCIK 0002132472 | Officer (Chief Technology Officer) |
Non-derivative securities (Table I)
Acquisitions and disposals of common stock and similar shares, one row per line on the filing.
| Trade date | Security | Transaction | Shares | Price | Value | Shares after | Ownership | Flags |
|---|---|---|---|---|---|---|---|---|
| Aug 20, 2026 | Class A Common Stock | CConversionAcquired | +696,798 | –F1 | – | 1,292,247 | Direct | |
| Aug 20, 2026 | Class A Common Stock | GGiftDisposed | −213,074 | $0.00 | $0 | 1,079,173 | Direct | |
| Aug 20, 2026 | Class A Common Stock | SSaleDisposed | −11,706 | $203.78F4 | −$2,385,448.68 | 1,067,467 | Direct | |
| Aug 20, 2026 | Class A Common Stock | SSaleDisposed | −47,766 | $204.87F5 | −$9,785,820.42 | 1,019,701 | Direct | |
| Aug 20, 2026 | Class A Common Stock | SSaleDisposed | −133,383 | $205.67F6 | −$27,432,881.61 | 886,318 | Direct | |
| Aug 20, 2026 | Class A Common Stock | SSaleDisposed | −93,017 | $206.67F7 | −$19,223,823.39 | 793,301 | Direct | |
| Aug 20, 2026 | Class A Common Stock | SSaleDisposed | −108,507 | $207.68F8 | −$22,534,733.76 | 684,794 | Direct | |
| Aug 20, 2026 | Class A Common Stock | SSaleDisposed | −119,311 | $208.69F9 | −$24,899,012.59 | 565,483 | Direct | |
| Aug 20, 2026 | Class A Common Stock | SSaleDisposed | −114,976 | $209.86F10 | −$24,128,863.36 | 450,507 | Direct | |
| Aug 20, 2026 | Class A Common Stock | SSaleDisposed | −46,214 | $210.56F11 | −$9,730,819.84 | 404,293 | Direct | |
| Aug 20, 2026 | Class A Common Stock | SSaleDisposed | −10,715 | $211.42F12 | −$2,265,365.3 | 393,578 | Direct | |
| Aug 20, 2026 | Class A Common Stock | SSaleDisposed | −24,652 | $212.64F13 | −$5,242,001.28 | 368,926 | Direct | |
| Aug 21, 2026 | Class A Common Stock | CConversionAcquired | +16,293 | $0.00 | $0 | 385,219 | Direct | |
| Aug 21, 2026 | Class A Common Stock | SSaleDisposed | −16,293 | $210.01F14 | −$3,421,692.93 | 368,926 | Direct |
Derivative securities (Table II)
Options, warrants, restricted stock units and similar. Shares are the underlying shares; price and value are for the derivative itself, and the holding after is in derivative units.
| Trade date | Security | Transaction | Underlying shares | Unit price | Value | Held after | Ownership | Flags |
|---|---|---|---|---|---|---|---|---|
| Aug 20, 2026 | Class B Common Stock | MOption exerciseDisposed | −308,236 | $0.00 | $0 | 41,764 | Direct | |
| Aug 20, 2026 | Class B Common Stock | MOption exerciseDisposed | −138,236 | $0.00 | $0 | 36,764 | Direct | |
| Aug 20, 2026 | Class B Common Stock | MOption exerciseDisposed | −87,326 | $0.00 | $0 | 12,674 | Direct | |
| Aug 20, 2026 | Class B Common Stock | MOption exerciseDisposed | −114,455 | $0.00 | $0 | 35,545 | Direct | |
| Aug 20, 2026 | Class B Common Stock | MOption exerciseDisposed | −48,545 | $0.00 | $0 | 351,455 | Direct | |
| Aug 20, 2026 | Class A Common Stock | MOption exerciseAcquired | +696,798 | $0.00F1 | $0 | 8,279,790 | Direct | |
| Aug 20, 2026 | Class A Common Stock | CConversionDisposed | −696,798 | $0.00 | $0 | 7,582,992 | Direct | |
| Aug 21, 2026 | Class B Common Stock | MOption exerciseDisposed | −16,293 | $0.00 | $0 | 335,162 | Direct | |
| Aug 21, 2026 | Class A Common Stock | MOption exerciseAcquired | +16,293 | $0.00 | $0 | 7,599,285 | Direct | |
| Aug 21, 2026 | Class A Common Stock | CConversionDisposed | −16,293 | $0.00 | $0 | 7,582,992 | Direct |
Footnotes and remarks
Livermore keeps the footnotes that transaction prices refer to, all footnotes of amendments (Form 4/A) and the filing's remarks. Other footnotes, such as how indirect holdings are held or the details of a trading plan, are only in the original on SEC EDGAR.
- 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.
Referenced by the price of 1 transaction in Table I and 1 transaction in Table II.
- F4
The sale price reported in Column 4 of Table 1 represents the weighted average sale price of the shares sold ranging from $203.18 to $204.17, 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.
Referenced by the price of 1 transaction in Table I.
- F5
The sale price reported in Column 4 of Table 1 represents the weighted average sale price of the shares sold ranging from $204.18 to $205.17, 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.
Referenced by the price of 1 transaction in Table I.
- F6
The sale price reported in Column 4 of Table 1 represents the weighted average sale price of the shares sold ranging from $205.18 to $206.17, 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.
Referenced by the price of 1 transaction in Table I.
- F7
The sale price reported in Column 4 of Table 1 represents the weighted average sale price of the shares sold ranging from $206.18 to $207.17, 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.
Referenced by the price of 1 transaction in Table I.
- F8
The sale price reported in Column 4 of Table 1 represents the weighted average sale price of the shares sold ranging from $207.18 to $208.17, 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.
Referenced by the price of 1 transaction in Table I.
- F9
The sale price reported in Column 4 of Table 1 represents the weighted average sale price of the shares sold ranging from $208.18 to $209.17, 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.
Referenced by the price of 1 transaction in Table I.
- F10
The sale price reported in Column 4 of Table 1 represents the weighted average sale price of the shares sold ranging from $209.18 to $210.17, 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.
Referenced by the price of 1 transaction in Table I.
- F11
The sale price reported in Column 4 of Table 1 represents the weighted average sale price of the shares sold ranging from $210.18 to $211.17, 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.
Referenced by the price of 1 transaction in Table I.
- F12
The sale price reported in Column 4 of Table 1 represents the weighted average sale price of the shares sold ranging from $211.21 to $212.12, 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.
Referenced by the price of 1 transaction in Table I.
- F13
The sale price reported in Column 4 of Table 1 represents the weighted average sale price of the shares sold ranging from $212.22 to $213.16, 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.
Referenced by the price of 1 transaction in Table I.
- F14
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 $210.16, 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.
Referenced by the price of 1 transaction in Table I.