Key facts
- This page summarizes Sean Lie's Form 4 filing for Cerebras Systems Inc. (CBRS).
- 15 reported transactions and 12 derivative rows are listed below.
- Accepted by SEC: 15 May 2026, 18:49.
Sean Lie - 13 May 2026 Form 4 Insider Report for Cerebras Systems Inc. (CBRS)
- Reporting relationship
- Chief Technology Officer, 10%+ Owner
- Issuer ticker
- CBRS
- Reported as of
- 13 May 2026
- Net transaction value
- $0
- SEC form
- 4
- Accepted by SEC
- 15 May 2026, 18:49:43 UTC
- Next SEC filing
- 29 Jun 2026
- Source filing
- View source filing
- Reporting owner signature
- /s/ Shirley Li, Attorney-in-Fact
Source evidence
Original filing metadata and source links for verification.
4 source fields
Reporting owner
1 detail
Key filing fact
Sean Lie filed Form 4 for Cerebras Systems Inc. (CBRS) on 15 May 2026.
Change
- No earlier filing in this sequence is available for direct comparison.
- Current net transaction value: $0.
Research use
- This tells you what this filing adds before you inspect full transaction and derivative tables.
- You can trace every row back to the original SEC filing document.
Evidence
Filed on Form 4
View source filing
Ownership activity is grounded in SEC Form 4 disclosures.
Reporting Owners (1)
CIK 0002132472
Primary reporting owner
Lie Sean
- Relationship
- Chief Technology Officer, 10%+ Owner
- Address
- C/O CEREBRAS SYSTEMS INC., 1237 E. ARQUES AVENUE, SUNNYVALE
- Signature
- /s/ Shirley Li, Attorney-in-Fact
- Signature date
- 15 May 2026
Reported non-derivative transactions
Shares, units, or other non-derivative securities reported in this filing.
CBRS
transaction
Class A Common Stock
Tax liability
- Transaction value
- Shares
- -96,127
- Change %
- -1.2%
- Price
- $185.00*
- Shares after
- 8,209,731
- Date
- 13 May 2026
- Ownership
- Direct
- Footnotes
- F1
CBRS
transaction
Class A Common Stock
Other
- Transaction value
- Shares
- -8,209,731
- Change %
- -100%
- Price
- Shares after
- 0
- Date
- 15 May 2026
- Ownership
- Direct
- Footnotes
- F2
CBRS
transaction
Class A Common Stock
Other
- Transaction value
- Shares
- -180,600
- Change %
- -100%
- Price
- Shares after
- 0
- Date
- 15 May 2026
- Ownership
- By Spouse
- Footnotes
- F2
Reported derivative securities
Options, warrants, convertible securities, or similar derivative positions disclosed in the filing.
CBRS
transaction
Derivative
Class B Common Stock
Other
- Transaction value
- Shares
- +8,209,731
- Change %
- Price
- Shares after
- 8,209,731
- Date
- 15 May 2026
- Ownership
- Direct
- Underlying class
- Class A Common Stock
- Underlying amount
- 8,209,731
- Exercise price
- Footnotes
- F2
CBRS
transaction
Derivative
Class B Common Stock
Other
- Transaction value
- Shares
- +180,600
- Change %
- Price
- Shares after
- 180,600
- Date
- 15 May 2026
- Ownership
- By Spouse
- Underlying class
- Class A Common Stock
- Underlying amount
- 180,600
- Exercise price
- Footnotes
- F2
CBRS
transaction
Derivative
Stock Option
Other
- Transaction value
- Shares
- -350,000
- Change %
- -100%
- Price
- Shares after
- 0
- Date
- 15 May 2026
- Ownership
- Direct
- Underlying class
- Class A Common Stock
- Underlying amount
- 350,000
- Exercise price
- $2.40
- Footnotes
- F2, F3
CBRS
transaction
Derivative
Stock Option
Other
- Transaction value
- Shares
- -175,000
- Change %
- -100%
- Price
- Shares after
- 0
- Date
- 15 May 2026
- Ownership
- Direct
- Underlying class
- Class A Common Stock
- Underlying amount
- 175,000
- Exercise price
- $2.72
- Footnotes
- F2, F3
CBRS
transaction
Derivative
Stock Option
Other
- Transaction value
- Shares
- -100,000
- Change %
- -100%
- Price
- Shares after
- 0
- Date
- 15 May 2026
- Ownership
- Direct
- Underlying class
- Class A Common Stock
- Underlying amount
- 100,000
- Exercise price
- $7.89
- Footnotes
- F2, F3
CBRS
transaction
Derivative
Stock Option
Other
- Transaction value
- Shares
- -150,000
- Change %
- -100%
- Price
- Shares after
- 0
- Date
- 15 May 2026
- Ownership
- Direct
- Underlying class
- Class A Common Stock
- Underlying amount
- 150,000
- Exercise price
- $5.02
- Footnotes
- F2, F4
CBRS
transaction
Derivative
Stock Option
Other
- Transaction value
- Shares
- -400,000
- Change %
- -100%
- Price
- Shares after
- 0
- Date
- 15 May 2026
- Ownership
- Direct
- Underlying class
- Class A Common Stock
- Underlying amount
- 400,000
- Exercise price
- $5.48
- Footnotes
- F2, F5
CBRS
transaction
Derivative
Stock Option
Other
- Transaction value
- Shares
- +350,000
- Change %
- Price
- Shares after
- 350,000
- Date
- 15 May 2026
- Ownership
- Direct
- Underlying class
- Class B Common Stock
- Underlying amount
- 350,000
- Exercise price
- $2.40
- Footnotes
- F2, F3
CBRS
transaction
Derivative
Stock Option
Other
- Transaction value
- Shares
- +175,000
- Change %
- Price
- Shares after
- 175,000
- Date
- 15 May 2026
- Ownership
- Direct
- Underlying class
- Class B Common Stock
- Underlying amount
- 175,000
- Exercise price
- $2.72
- Footnotes
- F2, F3
CBRS
transaction
Derivative
Stock Option
Other
- Transaction value
- Shares
- +100,000
- Change %
- Price
- Shares after
- 100,000
- Date
- 15 May 2026
- Ownership
- Direct
- Underlying class
- Class B Common Stock
- Underlying amount
- 100,000
- Exercise price
- $7.89
- Footnotes
- F2, F3
CBRS
transaction
Derivative
Stock Option
Other
- Transaction value
- Shares
- +150,000
- Change %
- Price
- Shares after
- 150,000
- Date
- 15 May 2026
- Ownership
- Direct
- Underlying class
- Class B Common Stock
- Underlying amount
- 150,000
- Exercise price
- $5.02
- Footnotes
- F2, F4
CBRS
transaction
Derivative
Stock Option
Other
- Transaction value
- Shares
- +400,000
- Change %
- Price
- Shares after
- 400,000
- Date
- 15 May 2026
- Ownership
- Direct
- Underlying class
- Class B Common Stock
- Underlying amount
- 400,000
- Exercise price
- $5.48
- Footnotes
- F2, F5
* marks a reported price that did not pass the local price check.
Additional SEC filing notes
Filing notes and footnotes
Explanation of responses 5 footnotes
Footnote F1
Represents shares withheld by the Issuer to satisfy tax liability on vesting of restricted stock units. Not a market sale.
Footnote F2
Immediately prior to the completion of the Issuer's initial public offering, each share of Class A common stock beneficially owned by the Reporting Person, including shares of Class A common stock underlying restricted stock unit ("RSU") and stock options awards, were reclassified into one share of Class B common stock in an exempt transaction pursuant to Rule 16b-7. Each share of Class B common stock is convertible at any time at the option of the holder into one share of Class A common stock.
Footnote F3
The stock option is fully vested and exercisable.
Footnote F4
The stock option vests in 48 substantially equal monthly installments beginning on February 1, 2023.
Footnote F5
The stock option vests in 48 substantially equal monthly installments beginning on February 1, 2024.