STOCK TITAN

Cerebras Systems Inc. (CBRS) shifts 1.9M insider shares

(Neutral)
(Neutral)
Form Type
4

Rhea-AI Filing Summary

Cerebras Systems Inc. (CBRS) director Steven Vassallo reported a series of restructuring transactions dated 2026-08-18 involving entities affiliated with Foundation Capital and family trusts. These transactions primarily converted Class B Common Stock into Class A Common Stock and redistributed Class A shares among funds, management entities, and trusts.

A total of 1,912,792 shares of Class B Common Stock held by Foundation Capital VIII, L.P., Foundation Capital VIII Principals Fund, L.L.C., and Foundation Capital Leadership Fund II, L.P. were converted into an equal number of Class A shares for no additional consideration, followed by multiple pro rata, in-kind distributions that footnotes describe as not purchases or sales. Vassallo is a manager or co-trustee of the relevant entities and disclaims beneficial ownership beyond his pecuniary interest.

Positive

  • None.

Negative

  • None.
Insider Vassallo Steven
Role Director
Type Security Shares Price Value
Conversion Class B Common Stock F1, F18, F2 1,738,913 -- --
Conversion Class B Common Stock F1, F18, F3 37,453 -- --
Conversion Class B Common Stock F1, F18, F4 136,426 -- --
Conversion Class A Common Stock F1, F2 1,738,913 -- --
Conversion Class A Common Stock F1, F3 37,453 -- --
Conversion Class A Common Stock F1, F4 136,426 -- --
Other Class A Common Stock F5, F2 1,738,913 $0.00 $0.00
Other Class A Common Stock F6, F3 37,453 $0.00 $0.00
Other Class A Common Stock F7, F4 136,426 $0.00 $0.00
Other Class A Common Stock F8, F9 449,885 $0.00 $0.00
Other Class A Common Stock F10, F9 449,885 $0.00 $0.00
Other Class A Common Stock F11, F12 28,373 $0.00 $0.00
Other Class A Common Stock F13, F12 29,741 $0.00 $0.00
Other Class A Common Stock F14, F15 105,210 $0.00 $0.00
Other Class A Common Stock F16, F17 54,126 $0.00 $0.00
Holdings After Transaction: Class B Common Stock — 10,433,479 shares (Indirect, By Foundation Capital VIII, L.P.); Class B Common Stock — 224,721 shares (Indirect, By Foundation Capital VIII Principals Fund, LLC); Class B Common Stock — 818,559 shares (Indirect, By Foundation Capital Leadership Fund II, L.P.); Class A Common Stock — 0 shares (Indirect, By Foundation Capital VIII, L.P.); Class A Common Stock — 0 shares (Indirect, By Foundation Capital VIII Principals Fund, L.L.C.); Class A Common Stock — 0 shares (Indirect, By Foundation Capital Leadership Fund II, L.P.); Class A Common Stock — 0 shares (Indirect, By Foundation Capital Management Co. VIII, L.L.C.); Class A Common Stock — 0 shares (Indirect, By Foundation Capital Management Co. LF II, L.L.C.); Class A Common Stock — 154,809 shares (Indirect, By Revocable Trust); Class A Common Stock — 105,070 shares (Indirect, By Irrevocable Trust)
Footnotes (18)
  1. F1. Each share of Class B Common Stock was converted into one share of Class A Common Stock for no additional consideration.
  2. F2. Securities are directly held by Foundation Capital VIII, L.P. ("FC8"). Foundation Capital Management Co. VIII, L.L.C. ("FCM8") is the general partner of FC8. The Reporting Person is a manager of FCM8 and may be deemed to beneficially own such shares. The Reporting Person disclaims beneficial ownership of the securities reported herein, except to the extent of his pecuniary interest therein.
  3. F3. Securities are directly held by Foundation Capital VIII Principals Fund, L.L.C. ("FC8P"). Foundation Capital Management Co. VIII, L.L.C. ("FCM8") is the manager of FC8P. The Reporting Person is a manager of FCM8 and may be deemed to beneficially own such shares. The Reporting Person disclaims beneficial ownership of the securities reported herein, except to the extent of his pecuniary interest therein.
  4. F4. Securities are directly held by Foundation Capital Leadership Fund II, L.P. ("FCLF2"). Foundation Capital Management Co. LF II, L.L.C. ("FCMLF2") is the general partner of FCLF2. The Reporting Person is a manager of FCMLF2 and may be deemed to beneficially own such shares. The Reporting Person disclaims beneficial ownership of the securities reported herein, except to the extent of his pecuniary interest therein.
  5. F5. Represents a pro rata, in-kind distribution, and not a purchase or sale of securities, by FC8 to its general partner and limited partners without additional consideration.
  6. F6. Represents a pro rata, in-kind distribution, and not a purchase or sale of securities, by FC8P to its general partner and limited partners without additional consideration.
  7. F7. Represents a pro rata, in-kind distribution, and not a purchase or sale of securities, by FCLF2 to its general partner and limited partners without additional consideration.
  8. F8. Represents receipt of shares in the distributions in kind described in footnotes (5) and (6).
  9. F9. Securities are directly held by FCM8. The Reporting Person is a manager of FCM8 and may be deemed to beneficially own such shares. The Reporting Person disclaims beneficial ownership of the securities reported herein, except to the extent of his pecuniary interest therein.
  10. F10. Represents a pro rata, in-kind distribution, and not a purchase or sale of securities, by FCM8 to its members without additional consideration.
  11. F11. Represents receipt of shares in the distribution in kind described in footnote (7).
  12. F12. Securities are directly held by FCMLF2. The Reporting Person is a manager of FCMLF2 and may be deemed to beneficially own such shares. The Reporting Person disclaims beneficial ownership of the securities reported herein, except to the extent of his pecuniary interest therein.
  13. F13. Represents a pro rata, in-kind distribution, and not a purchase or sale of securities, by FCMLF2 to its members without additional consideration.
  14. F14. Represents receipt of shares in the distributions in kind described in footnotes (6), (10) and (13).
  15. F15. The securities are held by a revocable family trust, of which the Reporting Person is a co-trustee. The Reporting Person disclaims beneficial ownership of such shares except to the extent of his proportionate pecuniary interest therein.
  16. F16. Represents receipt of shares in the distributions in kind described in footnotes (10) and (13).
  17. F17. The securities are held by an irrevocable GST trust, of which the Reporting Person is a co-trustee. The Reporting Person disclaims beneficial ownership of these shares except to the extent of his pecuniary interest therein.
  18. F18. Each share of Class B Common Stock is convertible into one share of Class A Common Stock at any time at the option of the holder and does not expire.
Class B shares converted 1,912,792 shares Total Class B Common Stock converted into Class A Common Stock on 2026-08-18
Restructuring-related shares 3,030,012 shares Shares involved in restructuring-type transactions (code J and related) per transactionSummary
FC8 Class B shares after conversion 10,433,479 shares Class B Common Stock indirectly held by Foundation Capital VIII, L.P. following the reported conversion
FC8P Class B shares after conversion 224,721 shares Class B Common Stock indirectly held by Foundation Capital VIII Principals Fund, L.L.C. following the reported conversion
FCLF2 Class B shares after conversion 818,559 shares Class B Common Stock indirectly held by Foundation Capital Leadership Fund II, L.P. following the reported conversion
Revocable trust Class A shares acquired 105,210 shares Class A Common Stock held by a revocable family trust after an in-kind distribution
Irrevocable trust Class A shares acquired 54,126 shares Class A Common Stock held by an irrevocable GST trust after an in-kind distribution
Class B Common Stock financial
"Each share of Class B Common Stock was converted into one share"
A class B common stock is one of multiple types of a company’s ordinary shares that carries specific rights—often different voting power or dividend priority—compared with other classes. For investors it matters because those differences affect how much influence you have over company decisions, the income you might receive, and how freely the shares trade; think of it like owning a car with different keys: some keys let you start the engine and open the trunk, others only unlock the door.
pro rata, in-kind distribution financial
"Represents a pro rata, in-kind distribution, and not a purchase or sale"
beneficial ownership financial
"may be deemed to beneficially own such shares. The Reporting Person disclaims beneficial ownership"
Beneficial ownership means the person or entity that actually enjoys the benefits of owning shares or other assets — such as receiving dividends, voting rights, or price gains — even if the legal title is held in another name. For investors it matters because knowing who truly controls and profits from a company reveals who can influence decisions, exposes potential conflicts of interest or hidden concentration of power, and affects transparency and risk in the stock.
pecuniary interest financial
"disclaims beneficial ownership of the securities reported herein, except to the extent of his pecuniary interest"
revocable family trust financial
"The securities are held by a revocable family trust, of which the Reporting Person is a co-trustee"
irrevocable GST trust financial
"The securities are held by an irrevocable GST trust, of which the Reporting Person is a co-trustee"

FAQ

What did Steven Vassallo report in his latest Form 4 for CBRS?

He reported multiple transactions on 2026-08-18 converting 1,912,792 shares of Class B Common Stock into Class A Common Stock and then redistributing Class A shares among Foundation Capital funds, management entities, and family trusts, as part of pro rata, in-kind transactions.

Were there any open-market stock purchases or sales in this CBRS Form 4?

No. Footnotes state that several transactions represent pro rata, in-kind distributions and are "not a purchase or sale of securities," and the conversions of Class B into Class A occurred for no additional consideration.

How many CBRS Class B shares were converted to Class A in this filing?

Entities associated with Steven Vassallo converted a total of 1,912,792 shares of Class B Common Stock into an equal number of Class A Common Stock, with each Class B share converting into one Class A share for no additional consideration.

Which entities were involved in the CBRS share restructurings reported by Vassallo?

The transactions involve Foundation Capital VIII, L.P., Foundation Capital VIII Principals Fund, L.L.C., Foundation Capital Leadership Fund II, L.P., their management entities Foundation Capital Management Co. VIII, L.L.C. and Foundation Capital Management Co. LF II, L.L.C., and revocable and irrevocable family trusts.

Does Steven Vassallo claim full beneficial ownership of the CBRS shares reported?

No. Footnotes state he may be deemed to beneficially own shares held by the various funds and trusts but disclaims beneficial ownership except to the extent of his pecuniary interest in those entities.

What role do the trusts play in the CBRS Form 4 transactions?

A revocable family trust and an irrevocable GST trust received 105,210 and 54,126 Class A shares, respectively, as part of in-kind distributions, with Vassallo as co-trustee; he disclaims beneficial ownership beyond his pecuniary interest.

AI-generated analysis. How Rhea-AI works. Not financial advice.

See more from StockTitan in Google Search and AI answers. Adds StockTitan as a preferred source · opens Google
Add on Google
Learn about SEC filing dates
SEC Form 4
FORM 4UNITED STATES SECURITIES AND EXCHANGE COMMISSION
Washington, D.C. 20549

STATEMENT OF CHANGES IN BENEFICIAL OWNERSHIP

Filed pursuant to Section 16(a) of the Securities Exchange Act of 1934
or Section 30(h) of the Investment Company Act of 1940
OMB APPROVAL
OMB Number:3235-0287
Estimated average burden
hours per response:0.5
Check this box if no longer subject to Section 16. Form 4 or Form 5 obligations may continue. See Instruction 1(b).
Check this box to indicate that a transaction was made pursuant to a contract, instruction or written plan for the purchase or sale of equity securities of the issuer that is intended to satisfy the affirmative defense conditions of Rule 10b5-1(c). See Instruction 10.
1. Name and Address of Reporting Person*
Vassallo Steven

(Last)(First)(Middle)
C/O FOUNDATION CAPITAL
550 HIGH STREET, 3RD FLOOR

(Street)
PALO ALTO CALIFORNIA 94301

(City)(State)(Zip)

UNITED STATES

(Country)
2. Issuer Name and Ticker or Trading Symbol
Cerebras Systems Inc. [ CBRS ]
5. Relationship of Reporting Person(s) to Issuer
(Check all applicable)
XDirector10% Owner
Officer (give title below)Other (specify below)
2a. Foreign Trading Symbol
3. Date of Earliest Transaction (Month/Day/Year)
08/18/2026
6. Individual or Joint/Group Filing (Check Applicable Line)
XForm filed by One Reporting Person
Form filed by More than One Reporting Person
4. If Amendment, Date of Original Filed (Month/Day/Year)

Table I - Non-Derivative Securities Acquired, Disposed of, or Beneficially Owned
1. Title of Security (Instr. 3) 2. Transaction Date (Month/Day/Year)2A. Deemed Execution Date, if any (Month/Day/Year)3. Transaction Code (Instr. 8) 4. Securities Acquired (A) or Disposed Of (D) (Instr. 3, 4 and 5) 5. Amount of Securities Beneficially Owned Following Reported Transaction(s) (Instr. 3 and 4) 6. Ownership Form: Direct (D) or Indirect (I) (Instr. 4) 7. Nature of Indirect Beneficial Ownership (Instr. 4)
CodeVAmount(A) or (D)Price
Class A Common Stock08/18/2026C1,738,913A(1)1,738,913IBy Foundation Capital VIII, L.P.(2)
Class A Common Stock08/18/2026C37,453A(1)37,453IBy Foundation Capital VIII Principals Fund, L.L.C.(3)
Class A Common Stock08/18/2026C136,426A(1)136,426IBy Foundation Capital Leadership Fund II, L.P.(4)
Class A Common Stock08/18/2026J(5)1,738,913D$00IBy Foundation Capital VIII, L.P.(2)
Class A Common Stock08/18/2026J(6)37,453D$00IBy Foundation Capital VIII Principals Fund, L.L.C.(3)
Class A Common Stock08/18/2026J(7)136,426D$00IBy Foundation Capital Leadership Fund II, L.P.(4)
Class A Common Stock08/18/2026J(8)449,885A$0449,885IBy Foundation Capital Management Co. VIII, L.L.C.(9)
Class A Common Stock08/18/2026J(10)449,885D$00IBy Foundation Capital Management Co. VIII, L.L.C.(9)
Class A Common Stock08/18/2026J(11)28,373A$029,741IBy Foundation Capital Management Co. LF II, L.L.C.(12)
Class A Common Stock08/18/2026J(13)29,741D$00IBy Foundation Capital Management Co. LF II, L.L.C.(12)
Class A Common Stock08/18/2026J(14)105,210A$0154,809IBy Revocable Trust(15)
Class A Common Stock08/18/2026J(16)54,126A$0105,070IBy Irrevocable Trust(17)
Table II - Derivative Securities Acquired, Disposed of, or Beneficially Owned
(e.g., puts, calls, warrants, options, convertible securities)
1. Title of Derivative Security (Instr. 3) 2. Conversion or Exercise Price of Derivative Security 3. Transaction Date (Month/Day/Year)3A. Deemed Execution Date, if any (Month/Day/Year)4. Transaction Code (Instr. 8) 5. Number of Derivative Securities Acquired (A) or Disposed of (D) (Instr. 3, 4 and 5) 6. Date Exercisable and Expiration Date (Month/Day/Year)7. Title and Amount of Securities Underlying Derivative Security (Instr. 3 and 4) 8. Price of Derivative Security (Instr. 5) 9. Number of derivative Securities Beneficially Owned Following Reported Transaction(s) (Instr. 4) 10. Ownership Form: Direct (D) or Indirect (I) (Instr. 4) 11. Nature of Indirect Beneficial Ownership (Instr. 4)
CodeV(A)(D)Date ExercisableExpiration DateTitleAmount or Number of Shares
Class B Common Stock(1)08/18/2026C1,738,913 (18) (18)Class A Common Stock1,738,913(1)10,433,479IBy Foundation Capital VIII, L.P.(2)
Class B Common Stock(1)08/18/2026C37,453 (18) (18)Class A Common Stock37,453(1)224,721IBy Foundation Capital VIII Principals Fund, LLC(3)
Class B Common Stock(1)08/18/2026C136,426 (18) (18)Class A Common Stock136,426(1)818,559IBy Foundation Capital Leadership Fund II, L.P.(4)
Explanation of Responses:
1. Each share of Class B Common Stock was converted into one share of Class A Common Stock for no additional consideration.
2. Securities are directly held by Foundation Capital VIII, L.P. ("FC8"). Foundation Capital Management Co. VIII, L.L.C. ("FCM8") is the general partner of FC8. The Reporting Person is a manager of FCM8 and may be deemed to beneficially own such shares. The Reporting Person disclaims beneficial ownership of the securities reported herein, except to the extent of his pecuniary interest therein.
3. Securities are directly held by Foundation Capital VIII Principals Fund, L.L.C. ("FC8P"). Foundation Capital Management Co. VIII, L.L.C. ("FCM8") is the manager of FC8P. The Reporting Person is a manager of FCM8 and may be deemed to beneficially own such shares. The Reporting Person disclaims beneficial ownership of the securities reported herein, except to the extent of his pecuniary interest therein.
4. Securities are directly held by Foundation Capital Leadership Fund II, L.P. ("FCLF2"). Foundation Capital Management Co. LF II, L.L.C. ("FCMLF2") is the general partner of FCLF2. The Reporting Person is a manager of FCMLF2 and may be deemed to beneficially own such shares. The Reporting Person disclaims beneficial ownership of the securities reported herein, except to the extent of his pecuniary interest therein.
5. Represents a pro rata, in-kind distribution, and not a purchase or sale of securities, by FC8 to its general partner and limited partners without additional consideration.
6. Represents a pro rata, in-kind distribution, and not a purchase or sale of securities, by FC8P to its general partner and limited partners without additional consideration.
7. Represents a pro rata, in-kind distribution, and not a purchase or sale of securities, by FCLF2 to its general partner and limited partners without additional consideration.
8. Represents receipt of shares in the distributions in kind described in footnotes (5) and (6).
9. Securities are directly held by FCM8. The Reporting Person is a manager of FCM8 and may be deemed to beneficially own such shares. The Reporting Person disclaims beneficial ownership of the securities reported herein, except to the extent of his pecuniary interest therein.
10. Represents a pro rata, in-kind distribution, and not a purchase or sale of securities, by FCM8 to its members without additional consideration.
11. Represents receipt of shares in the distribution in kind described in footnote (7).
12. Securities are directly held by FCMLF2. The Reporting Person is a manager of FCMLF2 and may be deemed to beneficially own such shares. The Reporting Person disclaims beneficial ownership of the securities reported herein, except to the extent of his pecuniary interest therein.
13. Represents a pro rata, in-kind distribution, and not a purchase or sale of securities, by FCMLF2 to its members without additional consideration.
14. Represents receipt of shares in the distributions in kind described in footnotes (6), (10) and (13).
15. The securities are held by a revocable family trust, of which the Reporting Person is a co-trustee. The Reporting Person disclaims beneficial ownership of such shares except to the extent of his proportionate pecuniary interest therein.
16. Represents receipt of shares in the distributions in kind described in footnotes (10) and (13).
17. The securities are held by an irrevocable GST trust, of which the Reporting Person is a co-trustee. The Reporting Person disclaims beneficial ownership of these shares except to the extent of his pecuniary interest therein.
18. Each share of Class B Common Stock is convertible into one share of Class A Common Stock at any time at the option of the holder and does not expire.
/s/ Steven Vassallo08/20/2026
** Signature of Reporting PersonDate
Reminder: Report on a separate line for each class of securities beneficially owned directly or indirectly.
* If the form is filed by more than one reporting person, see Instruction 4 (b)(v).
** Intentional misstatements or omissions of facts constitute Federal Criminal Violations See 18 U.S.C. 1001 and 15 U.S.C. 78ff(a).
Note: File three copies of this Form, one of which must be manually signed. If space is insufficient, see Instruction 6 for procedure.
Persons who respond to the collection of information contained in this form are not required to respond unless the form displays a currently valid OMB Number.
* Form 4: SEC 1474 (03-26)