LIE SEAN (Chief Technology Officer) reported 3 transactions at CEREBRAS SYSTEMS INC.

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

LIE SEAN

Filed: 5/15/2026ACC: 0001628280-26-035739

InsiderLIE SEANCIK 2132472

→

IssuerCEREBRAS SYSTEMS INC.CIK 2021728

Officer10% Owner· Chief Technology Officer

Since May 2026

-96.13K

Net shares

Net seller

$17.78M

Total sold

Open market trades

0B · 0S

Total transactions

9.57M acquired · 9.66M disposed

Non-Derivative Transactions3

Class A Common Stock

Direct

F · Tax Withholding

−96.13K

Price / share

$185.00

Trade value

$17.78M

% of position

1.2%

5/13/2026

8.31M→8.21M

Class A Common Stock

Direct

J · J

−8.21M

Price / share

—

Trade value

—

% of position

New position

5/15/2026

8.21M→0.00

Class A Common Stock

Indirect

J · J

−180.60K

Price / share

—

Trade value

—

% of position

New position

5/15/2026

180.60K→0.00

Total

Net shares

−8.49M

Net value

-$17.78M

Security	Date	Type	Shares	Price / Share	Trade Value	% of Position	Held Before	Held After
Class A Common Stock Direct	5/13/2026	F · Tax Withholding	−96.13K	$185.00	$17.78M	1.2%	8.31M	8.21M
Class A Common Stock Direct	5/15/2026	J · J	−8.21M	—	—	New position	8.21M	0.00
Class A Common Stock Indirect	5/15/2026	J · J	−180.60K	—	—	New position	180.60K	0.00
Total			−8.49M		-$17.78M

Derivative Transactions12

Class B Common Stock

Direct

J · J

Converts to

Class A Common Stock

8.21M shares

+8.21M

Strike price

Held after

8.21M

Exercisable

—

5/15/2026

Class B Common Stock

Indirect

J · J

Converts to

Class A Common Stock

180.60K shares

+180.60K

Strike price

Held after

180.60K

Exercisable

—

5/15/2026

Stock Option

Direct

J · J

Converts to

Class A Common Stock

350K shares

−350K

Strike price

2.40

Held after

0.00

Exercisable

—

5/15/2026

Stock Option

Direct

J · J

Converts to

Class A Common Stock

175K shares

−175K

Strike price

2.72

Held after

0.00

Exercisable

—

5/15/2026

Stock Option

Direct

J · J

Converts to

Class A Common Stock

100K shares

−100K

Strike price

7.89

Held after

0.00

Exercisable

—

5/15/2026

Stock Option

Direct

J · J

Converts to

Class A Common Stock

150K shares

−150K

Strike price

5.02

Held after

0.00

Exercisable

—

5/15/2026

Stock Option

Direct

J · J

Converts to

Class A Common Stock

400K shares

−400K

Strike price

5.48

Held after

0.00

Exercisable

—

5/15/2026

Stock Option

Direct

J · J

Converts to

Class B Common Stock

350K shares

+350K

Strike price

2.40

Held after

350K

Exercisable

—

5/15/2026

Stock Option

Direct

J · J

Converts to

Class B Common Stock

175K shares

+175K

Strike price

2.72

Held after

175K

Exercisable

—

5/15/2026

Stock Option

Direct

J · J

Converts to

Class B Common Stock

100K shares

+100K

Strike price

7.89

Held after

100K

Exercisable

—

5/15/2026

Stock Option

Direct

J · J

Converts to

Class B Common Stock

150K shares

+150K

Strike price

5.02

Held after

150K

Exercisable

—

5/15/2026

Stock Option

Direct

J · J

Converts to

Class B Common Stock

400K shares

+400K

Strike price

5.48

Held after

400K

Exercisable

—

5/15/2026

Security	Converts To	Date	Type	Shares	Strike Price	Exercisable	Held After
Class B Common Stock Direct	Class A Common Stock8.21M shares	5/15/2026	J · J	+8.21M		—	8.21M
Class B Common Stock Indirect	Class A Common Stock180.60K shares	5/15/2026	J · J	+180.60K		—	180.60K
Stock Option Direct	Class A Common Stock350K shares	5/15/2026	J · J	−350K	2.40	—	0.00
Stock Option Direct	Class A Common Stock175K shares	5/15/2026	J · J	−175K	2.72	—	0.00
Stock Option Direct	Class A Common Stock100K shares	5/15/2026	J · J	−100K	7.89	—	0.00
Stock Option Direct	Class A Common Stock150K shares	5/15/2026	J · J	−150K	5.02	—	0.00
Stock Option Direct	Class A Common Stock400K shares	5/15/2026	J · J	−400K	5.48	—	0.00
Stock Option Direct	Class B Common Stock350K shares	5/15/2026	J · J	+350K	2.40	—	350K
Stock Option Direct	Class B Common Stock175K shares	5/15/2026	J · J	+175K	2.72	—	175K
Stock Option Direct	Class B Common Stock100K shares	5/15/2026	J · J	+100K	7.89	—	100K
Stock Option Direct	Class B Common Stock150K shares	5/15/2026	J · J	+150K	5.02	—	150K
Stock Option Direct	Class B Common Stock400K shares	5/15/2026	J · J	+400K	5.48	—	400K