Key facts
- This page summarizes Lior Susan's Form 4 filing for Cerebras Systems Inc. (CBRS).
- 9 reported transactions and 8 derivative rows are listed below.
- Accepted by SEC: 15 May 2026, 18:50.
Lior Susan - 15 May 2026 Form 4 Insider Report for Cerebras Systems Inc. (CBRS)
- Reporting relationship
- Director, 10%+ Owner
- Issuer ticker
- CBRS
- Reported as of
- 15 May 2026
- Net transaction value
- $0
- SEC form
- 4
- Accepted by SEC
- 15 May 2026, 18:50:31 UTC
- Prior SEC filing
- 13 May 2026
- Next SEC filing
- 12 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.
5 source fields
Reporting owner
1 detail
Key filing fact
Lior Susan filed Form 4 for Cerebras Systems Inc. (CBRS) on 15 May 2026.
Change
- Previous filing in this sequence was filed on 13 May 2026.
- 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 0001832895
Primary reporting owner
Susan Lior
- Relationship
- Director, 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
Other
- Transaction value
- Shares
- -1,093,998
- Change %
- -100%
- Price
- Shares after
- 0
- Date
- 15 May 2026
- Ownership
- See footnotes
- Footnotes
- F1, F2, F3
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
- +1,093,998
- Change %
- Price
- Shares after
- 1,093,998
- Date
- 15 May 2026
- Ownership
- See footnotes
- Underlying class
- Class A Common Stock
- Underlying amount
- 1,093,998
- Exercise price
- Footnotes
- F1, F2, F3
CBRS
transaction
Derivative
Series A Preferred Stock
Conversion of derivative security
- Transaction value
- Shares
- -4,419,405
- Change %
- -100%
- Price
- Shares after
- 0
- Date
- 15 May 2026
- Ownership
- See footnotes
- Underlying class
- Class B Common Stock
- Underlying amount
- 4,419,405
- Exercise price
- Footnotes
- F1, F2, F3
CBRS
transaction
Derivative
Series B Preferred Stock
Conversion of derivative security
- Transaction value
- Shares
- -599,465
- Change %
- -100%
- Price
- Shares after
- 0
- Date
- 15 May 2026
- Ownership
- See footnotes
- Underlying class
- Class B Common Stock
- Underlying amount
- 599,465
- Exercise price
- Footnotes
- F1, F2, F3
CBRS
transaction
Derivative
Series C Preferred Stock
Conversion of derivative security
- Transaction value
- Shares
- -486,175
- Change %
- -100%
- Price
- Shares after
- 0
- Date
- 15 May 2026
- Ownership
- See footnotes
- Underlying class
- Class B Common Stock
- Underlying amount
- 486,175
- Exercise price
- Footnotes
- F1, F2, F3
CBRS
transaction
Derivative
Series D Preferred Stock
Conversion of derivative security
- Transaction value
- Shares
- -309,678
- Change %
- -100%
- Price
- Shares after
- 0
- Date
- 15 May 2026
- Ownership
- See footnotes
- Underlying class
- Class B Common Stock
- Underlying amount
- 309,678
- Exercise price
- Footnotes
- F1, F2, F3
CBRS
transaction
Derivative
Series E Preferred Stock
Conversion of derivative security
- Transaction value
- Shares
- -6,548,466
- Change %
- -100%
- Price
- Shares after
- 0
- Date
- 15 May 2026
- Ownership
- See footnotes
- Underlying class
- Class B Common Stock
- Underlying amount
- 6,548,466
- Exercise price
- Footnotes
- F1, F2, F3
CBRS
transaction
Derivative
Series F Preferred Stock
Conversion of derivative security
- Transaction value
- Shares
- -9,010
- Change %
- -100%
- Price
- Shares after
- 0
- Date
- 15 May 2026
- Ownership
- See footnotes
- Underlying class
- Class B Common Stock
- Underlying amount
- 9,010
- Exercise price
- Footnotes
- F1, F2, F3
CBRS
transaction
Derivative
Class B Common Stock
Conversion of derivative security
- Transaction value
- Shares
- +12,372,199
- Change %
- +1131%
- Price
- Shares after
- 13,466,197
- Date
- 15 May 2026
- Ownership
- See footnotes
- Underlying class
- Class A Common Stock
- Underlying amount
- 12,372,199
- Exercise price
- Footnotes
- F1, F3, F4
* marks a reported price that did not pass the local price check.
Additional SEC filing notes
Filing notes and footnotes
Explanation of responses 4 footnotes
Footnote F1
Immediately prior to the closing of the Issuer's initial public offering, each share of Class A common stock was reclassified, and each share of the Issuer's redeemable convertible preferred stock automatically converted and was 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 F2
Consists of (i) 486,175 shares of Class B common stock underlying Series C Preferred Stock, 309,678 shares of Class B common stock underlying Series D Preferred Stock, and 4,505 shares of Class B common stock underlying Series F Preferred Stock held by Eclipse Continuity Fund I, L.P. ("Eclipse Continuity Fund"); (ii) 6,548,466 shares of Class B common stock underlying Series E Preferred Stock held by Eclipse SPV II, L.P. ("Eclipse SPV II"); (iii) 599,880 shares of Class B common stock held by Eclipse SPV XIII, L.P. ("Eclipse SPV XIII"); and (iv) 494,118 shares of Class B common stock, 4,419,405 shares of Class B common stock underlying Series A Preferred Stock, 599,465 shares of Class B common stock underlying Series B Preferred Stock, and 4,505 shares of Class B common stock underlying Series F Preferred Stock held by Eclipse Ventures Fund I, L.P. ("Eclipse Fund," and together with Eclipse Continuity Fund, Eclipse SPV II, and Eclipse SPV XIII, "Eclipse Entities").
Footnote F3
The Reporting Person is the sole managing member of the general partner of each of the Eclipse Entities and may be deemed to have voting, investment, and dispositive power with respect to the shares held by such entities.
Footnote F4
Following the transactions reported herein, consists of (i) 800,358 shares of Class B common stock held by Eclipse Continuity Fund, (ii) 6,548,466 shares of Class B common stock held by Eclipse SPV II, (iii) 599,880 shares of Class B common stock held by Eclipse SPV XIII, and (iv) 5,517,493 shares of Class B common stock held by Eclipse Fund.