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: 8/21/2026ACC: 0001231919-26-000962

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

→

IssuerCEREBRAS SYSTEMS INC.CIK 2021728

10% Owner

Since May 2026

-1.91M

Net shares

Net seller

$0.00

Total acquired

Open market trades

0B · 0S

Total transactions

2.39M acquired · 4.31M disposed

Non-Derivative Transactions10

Class A Common Stock

Indirect

C · Conversion

+1.74M

Price / share

—

Trade value

—

% of position

New position

8/18/2026

0.00→1.74M

Class A Common Stock

Indirect

C · Conversion

+37.45K

Price / share

—

Trade value

—

% of position

New position

8/18/2026

0.00→37.45K

Class A Common Stock

Indirect

C · Conversion

+136.43K

Price / share

—

Trade value

—

% of position

New position

8/18/2026

0.00→136.43K

Class A Common Stock

Indirect

J · J

−1.74M

Price / share

—

Trade value

—

% of position

New position

8/18/2026

1.74M→0.00

Class A Common Stock

Indirect

J · J

−37.45K

Price / share

—

Trade value

—

% of position

New position

8/18/2026

37.45K→0.00

Class A Common Stock

Indirect

J · J

−136.43K

Price / share

—

Trade value

—

% of position

New position

8/18/2026

136.43K→0.00

Class A Common Stock

Indirect

J · J

+449.88K

Price / share

—

Trade value

—

% of position

New position

8/18/2026

0.00→449.88K

Class A Common Stock

Indirect

J · J

−449.88K

Price / share

—

Trade value

—

% of position

New position

8/18/2026

449.88K→0.00

Class A Common Stock

Indirect

J · J

+28.37K

Price / share

—

Trade value

—

% of position

2074.0%

8/18/2026

1.37K→29.74K

Class A Common Stock

Indirect

J · J

−29.74K

Price / share

—

Trade value

—

% of position

New position

8/18/2026

29.74K→0.00

Total

Net shares

−1.37K

Net value

$0.00

Security	Date	Type	Shares	Price / Share	Trade Value	% of Position	Held Before	Held After
Class A Common Stock Indirect	8/18/2026	C · Conversion	+1.74M	—	—	New position	0.00	1.74M
Class A Common Stock Indirect	8/18/2026	C · Conversion	+37.45K	—	—	New position	0.00	37.45K
Class A Common Stock Indirect	8/18/2026	C · Conversion	+136.43K	—	—	New position	0.00	136.43K
Class A Common Stock Indirect	8/18/2026	J · J	−1.74M	—	—	New position	1.74M	0.00
Class A Common Stock Indirect	8/18/2026	J · J	−37.45K	—	—	New position	37.45K	0.00
Class A Common Stock Indirect	8/18/2026	J · J	−136.43K	—	—	New position	136.43K	0.00
Class A Common Stock Indirect	8/18/2026	J · J	+449.88K	—	—	New position	0.00	449.88K
Class A Common Stock Indirect	8/18/2026	J · J	−449.88K	—	—	New position	449.88K	0.00
Class A Common Stock Indirect	8/18/2026	J · J	+28.37K	—	—	2074.0%	1.37K	29.74K
Class A Common Stock Indirect	8/18/2026	J · J	−29.74K	—	—	New position	29.74K	0.00
Total			−1.37K		$0.00

Derivative Transactions3

Class B Common Stock

Indirect

C · Conversion

Converts to

Class A Common Stock

1.74M shares

−1.74M

Strike price

Held after

10.43M

Exercisable

—

8/18/2026

Class B Common Stock

Indirect

C · Conversion

Converts to

Class A Common Stock

37.45K shares

−37.45K

Strike price

Held after

224.72K

Exercisable

—

8/18/2026

Class B Common Stock

Indirect

C · Conversion

Converts to

Class A Common Stock

136.43K shares

−136.43K

Strike price

Held after

818.56K

Exercisable

—

8/18/2026

Security	Converts To	Date	Type	Shares	Exercisable	Held After
Class B Common Stock Indirect	Class A Common Stock1.74M shares	8/18/2026	C · Conversion	−1.74M	—	10.43M
Class B Common Stock Indirect	Class A Common Stock37.45K shares	8/18/2026	C · Conversion	−37.45K	—	224.72K
Class B Common Stock Indirect	Class A Common Stock136.43K shares	8/18/2026	C · Conversion	−136.43K	—	818.56K