FOUNDATION CAPITAL MANAGEMENT CO. VIII, L.L.C.

Filed: 5/19/2026ACC: 0001231919-26-000511

InsiderFOUNDATION CAPITAL MANAGEMENT CO. VIII, L.L.C.CIK 1645076

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IssuerCEREBRAS SYSTEMS INC.CIK 2021728

10% Owner

Since May 2026

0.00

Net shares

Net seller

$0.00

Total acquired

Open market trades

0B · 0S

Total transactions

15.30M acquired · 15.30M disposed

Non-Derivative Transactions0

No non-derivative transactions reported

Derivative Transactions14

Series A Preferred Stock

Indirect

C · Conversion

Converts to

Class B Common Stock

12.32M shares

−12.32M

Strike price

Held after

0.00

Exercisable

—

5/15/2026

Series A Preferred Stock

Indirect

C · Conversion

Converts to

Class B Common Stock

265.41K shares

−265.41K

Strike price

Held after

0.00

Exercisable

—

5/15/2026

Series B Preferred Stock

Indirect

C · Conversion

Converts to

Class B Common Stock

1.40M shares

−1.40M

Strike price

Held after

0.00

Exercisable

—

5/15/2026

Series B Preferred Stock

Indirect

C · Conversion

Converts to

Class B Common Stock

30.05K shares

−30.05K

Strike price

Held after

0.00

Exercisable

—

5/15/2026

Series C Preferred Stock

Indirect

C · Conversion

Converts to

Class B Common Stock

109.41K shares

−109.41K

Strike price

Held after

0.00

Exercisable

—

5/15/2026

Series C Preferred Stock

Indirect

C · Conversion

Converts to

Class B Common Stock

2.36K shares

−2.36K

Strike price

Held after

0.00

Exercisable

—

5/15/2026

Series D Preferred Stock

Indirect

C · Conversion

Converts to

Class B Common Stock

30.32K shares

−30.32K

Strike price

Held after

0.00

Exercisable

—

5/15/2026

Series D Preferred Stock

Indirect

C · Conversion

Converts to

Class B Common Stock

653.00 shares

−653.00

Strike price

Held after

0.00

Exercisable

—

5/15/2026

Series E Preferred Stock

Indirect

C · Conversion

Converts to

Class B Common Stock

53.42K shares

−53.42K

Strike price

Held after

0.00

Exercisable

—

5/15/2026

Series E Preferred Stock

Indirect

C · Conversion

Converts to

Class B Common Stock

1.15K shares

−1.15K

Strike price

Held after

0.00

Exercisable

—

5/15/2026

Series E Preferred Stock

Indirect

C · Conversion

Converts to

Class B Common Stock

1.09M shares

−1.09M

Strike price

Held after

0.00

Exercisable

—

5/15/2026

Class B Common Stock

Indirect

C · Conversion

Converts to

Class A Common Stock

13.91M shares

+13.91M

Strike price

Held after

13.91M

Exercisable

—

5/15/2026

Class B Common Stock

Indirect

C · Conversion

Converts to

Class A Common Stock

299.63K shares

+299.63K

Strike price

Held after

299.63K

Exercisable

—

5/15/2026

Class B Common Stock

Indirect

C · Conversion

Converts to

Class A Common Stock

1.09M shares

+1.09M

Strike price

Held after

1.09M

Exercisable

—

5/15/2026

Security	Converts To	Date	Type	Shares	Exercisable	Held After
Series A Preferred Stock Indirect	Class B Common Stock12.32M shares	5/15/2026	C · Conversion	−12.32M	—	0.00
Series A Preferred Stock Indirect	Class B Common Stock265.41K shares	5/15/2026	C · Conversion	−265.41K	—	0.00
Series B Preferred Stock Indirect	Class B Common Stock1.40M shares	5/15/2026	C · Conversion	−1.40M	—	0.00
Series B Preferred Stock Indirect	Class B Common Stock30.05K shares	5/15/2026	C · Conversion	−30.05K	—	0.00
Series C Preferred Stock Indirect	Class B Common Stock109.41K shares	5/15/2026	C · Conversion	−109.41K	—	0.00
Series C Preferred Stock Indirect	Class B Common Stock2.36K shares	5/15/2026	C · Conversion	−2.36K	—	0.00
Series D Preferred Stock Indirect	Class B Common Stock30.32K shares	5/15/2026	C · Conversion	−30.32K	—	0.00
Series D Preferred Stock Indirect	Class B Common Stock653.00 shares	5/15/2026	C · Conversion	−653.00	—	0.00
Series E Preferred Stock Indirect	Class B Common Stock53.42K shares	5/15/2026	C · Conversion	−53.42K	—	0.00
Series E Preferred Stock Indirect	Class B Common Stock1.15K shares	5/15/2026	C · Conversion	−1.15K	—	0.00
Series E Preferred Stock Indirect	Class B Common Stock1.09M shares	5/15/2026	C · Conversion	−1.09M	—	0.00
Class B Common Stock Indirect	Class A Common Stock13.91M shares	5/15/2026	C · Conversion	+13.91M	—	13.91M
Class B Common Stock Indirect	Class A Common Stock299.63K shares	5/15/2026	C · Conversion	+299.63K	—	299.63K
Class B Common Stock Indirect	Class A Common Stock1.09M shares	5/15/2026	C · Conversion	+1.09M	—	1.09M