FOUNDATION CAPITAL MANAGEMENT CO. VIII, L.L.C. reported 12 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: 8/18/2026ACC: 0001231919-26-000942

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

2.36M acquired · 4.28M disposed

Non-Derivative Transactions12

Class A Common Stock

Indirect

C · Conversion

+1.39M

Price / share

—

Trade value

—

% of position

New position

6/24/2026

0.00→1.39M

Class A Common Stock

Indirect

C · Conversion

+29.96K

Price / share

—

Trade value

—

% of position

New position

6/24/2026

0.00→29.96K

Class A Common Stock

Indirect

C · Conversion

+109.14K

Price / share

—

Trade value

—

% of position

New position

6/24/2026

0.00→109.14K

Class A Common Stock

Indirect

C · Conversion

+347.78K

Price / share

—

Trade value

—

% of position

25.0%

8/14/2026

1.39M→1.74M

Class A Common Stock

Indirect

C · Conversion

+7.49K

Price / share

—

Trade value

—

% of position

25.0%

8/14/2026

29.96K→37.45K

Class A Common Stock

Indirect

C · Conversion

+27.29K

Price / share

—

Trade value

—

% of position

25.0%

8/14/2026

109.14K→136.43K

Class A Common Stock

Indirect

J · J

−1.74M

Price / share

—

Trade value

—

% of position

New position

8/14/2026

1.74M→0.00

Class A Common Stock

Indirect

J · J

−37.45K

Price / share

—

Trade value

—

% of position

New position

8/14/2026

37.45K→0.00

Class A Common Stock

Indirect

J · J

−136.43K

Price / share

—

Trade value

—

% of position

New position

8/14/2026

136.43K→0.00

Class A Common Stock

Indirect

J · J

+449.88K

Price / share

—

Trade value

—

% of position

New position

8/14/2026

0.00→449.88K

Class A Common Stock

Indirect

J · J

−449.88K

Price / share

—

Trade value

—

% of position

New position

8/14/2026

449.88K→0.00

Class A Common Stock

Indirect

J · J

+1.37K

Price / share

—

Trade value

—

% of position

New position

8/14/2026

0.00→1.37K

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	6/24/2026	C · Conversion	+1.39M	—	—	New position	0.00	1.39M
Class A Common Stock Indirect	6/24/2026	C · Conversion	+29.96K	—	—	New position	0.00	29.96K
Class A Common Stock Indirect	6/24/2026	C · Conversion	+109.14K	—	—	New position	0.00	109.14K
Class A Common Stock Indirect	8/14/2026	C · Conversion	+347.78K	—	—	25.0%	1.39M	1.74M
Class A Common Stock Indirect	8/14/2026	C · Conversion	+7.49K	—	—	25.0%	29.96K	37.45K
Class A Common Stock Indirect	8/14/2026	C · Conversion	+27.29K	—	—	25.0%	109.14K	136.43K
Class A Common Stock Indirect	8/14/2026	J · J	−1.74M	—	—	New position	1.74M	0.00
Class A Common Stock Indirect	8/14/2026	J · J	−37.45K	—	—	New position	37.45K	0.00
Class A Common Stock Indirect	8/14/2026	J · J	−136.43K	—	—	New position	136.43K	0.00
Class A Common Stock Indirect	8/14/2026	J · J	+449.88K	—	—	New position	0.00	449.88K
Class A Common Stock Indirect	8/14/2026	J · J	−449.88K	—	—	New position	449.88K	0.00
Class A Common Stock Indirect	8/14/2026	J · J	+1.37K	—	—	New position	0.00	1.37K
Total			+1.37K		$0.00

Derivative Transactions6

Class B Common Stock

Indirect

C · Conversion

Converts to

Class A Common Stock

1.39M shares

−1.39M

Strike price

Held after

12.52M

Exercisable

—

6/24/2026

Class B Common Stock

Indirect

C · Conversion

Converts to

Class A Common Stock

29.96K shares

−29.96K

Strike price

Held after

269.66K

Exercisable

—

6/24/2026

Class B Common Stock

Indirect

C · Conversion

Converts to

Class A Common Stock

109.14K shares

−109.14K

Strike price

Held after

982.27K

Exercisable

—

6/24/2026

Class B Common Stock

Indirect

C · Conversion

Converts to

Class A Common Stock

347.78K shares

−347.78K

Strike price

Held after

12.17M

Exercisable

—

8/14/2026

Class B Common Stock

Indirect

C · Conversion

Converts to

Class A Common Stock

7.49K shares

−7.49K

Strike price

Held after

262.17K

Exercisable

—

8/14/2026

Class B Common Stock

Indirect

C · Conversion

Converts to

Class A Common Stock

27.29K shares

−27.29K

Strike price

Held after

954.99K

Exercisable

—

8/14/2026

Security	Converts To	Date	Type	Shares	Exercisable	Held After
Class B Common Stock Indirect	Class A Common Stock1.39M shares	6/24/2026	C · Conversion	−1.39M	—	12.52M
Class B Common Stock Indirect	Class A Common Stock29.96K shares	6/24/2026	C · Conversion	−29.96K	—	269.66K
Class B Common Stock Indirect	Class A Common Stock109.14K shares	6/24/2026	C · Conversion	−109.14K	—	982.27K
Class B Common Stock Indirect	Class A Common Stock347.78K shares	8/14/2026	C · Conversion	−347.78K	—	12.17M
Class B Common Stock Indirect	Class A Common Stock7.49K shares	8/14/2026	C · Conversion	−7.49K	—	262.17K
Class B Common Stock Indirect	Class A Common Stock27.29K shares	8/14/2026	C · Conversion	−27.29K	—	954.99K