FOUNDATION CAPITAL MANAGEMENT CO. VIII, L.L.C. reported 10 transactions at CEREBRAS SYSTEMS INC.

Review the transaction codes below to understand the nature of each event.

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

Filed: 8/25/2026ACC: 0001231919-26-001100

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

→

IssuerCEREBRAS SYSTEMS INC.CIK 2021728

10% Owner

Since May 2026

-1.22M

Net shares

Net seller

$0.00

Total acquired

Open market trades

0B · 0S

Total transactions

1.53M acquired · 2.75M disposed

Non-Derivative Transactions10

Class A Common Stock

Indirect

C · Conversion

+1.11M

Price / share

—

Trade value

—

% of position

New position

8/21/2026

0.00→1.11M

Class A Common Stock

Indirect

C · Conversion

+23.97K

Price / share

—

Trade value

—

% of position

New position

8/21/2026

0.00→23.97K

Class A Common Stock

Indirect

C · Conversion

+87.31K

Price / share

—

Trade value

—

% of position

New position

8/21/2026

0.00→87.31K

Class A Common Stock

Indirect

J · J

−1.11M

Price / share

—

Trade value

—

% of position

New position

8/21/2026

1.11M→0.00

Class A Common Stock

Indirect

J · J

−23.97K

Price / share

—

Trade value

—

% of position

New position

8/21/2026

23.97K→0.00

Class A Common Stock

Indirect

J · J

−87.31K

Price / share

—

Trade value

—

% of position

New position

8/21/2026

87.31K→0.00

Class A Common Stock

Indirect

J · J

+287.93K

Price / share

—

Trade value

—

% of position

New position

8/21/2026

0.00→287.93K

Class A Common Stock

Indirect

J · J

−287.93K

Price / share

—

Trade value

—

% of position

New position

8/21/2026

287.93K→0.00

Class A Common Stock

Indirect

J · J

+18.16K

Price / share

—

Trade value

—

% of position

New position

8/21/2026

0.00→18.16K

Class A Common Stock

Indirect

J · J

−18.16K

Price / share

—

Trade value

—

% of position

New position

8/21/2026

18.16K→0.00

Total

Net shares

+0.00

Net value

$0.00

Security	Date	Type	Shares	Price / Share	Trade Value	% of Position	Held Before	Held After
Class A Common Stock Indirect	8/21/2026	C · Conversion	+1.11M	—	—	New position	0.00	1.11M
Class A Common Stock Indirect	8/21/2026	C · Conversion	+23.97K	—	—	New position	0.00	23.97K
Class A Common Stock Indirect	8/21/2026	C · Conversion	+87.31K	—	—	New position	0.00	87.31K
Class A Common Stock Indirect	8/21/2026	J · J	−1.11M	—	—	New position	1.11M	0.00
Class A Common Stock Indirect	8/21/2026	J · J	−23.97K	—	—	New position	23.97K	0.00
Class A Common Stock Indirect	8/21/2026	J · J	−87.31K	—	—	New position	87.31K	0.00
Class A Common Stock Indirect	8/21/2026	J · J	+287.93K	—	—	New position	0.00	287.93K
Class A Common Stock Indirect	8/21/2026	J · J	−287.93K	—	—	New position	287.93K	0.00
Class A Common Stock Indirect	8/21/2026	J · J	+18.16K	—	—	New position	0.00	18.16K
Class A Common Stock Indirect	8/21/2026	J · J	−18.16K	—	—	New position	18.16K	0.00
Total			+0.00		$0.00

Derivative Transactions3

Class B Common Stock

Indirect

C · Conversion

Converts to

Class A Common Stock

1.11M shares

−1.11M

Strike price

Held after

9.32M

Exercisable

—

8/21/2026

Class B Common Stock

Indirect

C · Conversion

Converts to

Class A Common Stock

23.97K shares

−23.97K

Strike price

Held after

200.75K

Exercisable

—

8/21/2026

Class B Common Stock

Indirect

C · Conversion

Converts to

Class A Common Stock

87.31K shares

−87.31K

Strike price

Held after

731.25K

Exercisable

—

8/21/2026

Security	Converts To	Date	Type	Shares	Exercisable	Held After
Class B Common Stock Indirect	Class A Common Stock1.11M shares	8/21/2026	C · Conversion	−1.11M	—	9.32M
Class B Common Stock Indirect	Class A Common Stock23.97K shares	8/21/2026	C · Conversion	−23.97K	—	200.75K
Class B Common Stock Indirect	Class A Common Stock87.31K shares	8/21/2026	C · Conversion	−87.31K	—	731.25K