SIEBEL THOMAS M (Chief Executive Officer) sold 0.3% of their position (17.35K shares) of C3.AI, INC. on the open market

Open‑market sale worth $196.4K — a minor trim. Review remaining holdings and any 10b5‑1 plan disclosures.

S · 1 sale

SIEBEL THOMAS M

Filed: 6/3/2026ACC: 0001577526-26-000058

InsiderSIEBEL THOMAS MCIK 1031530

→

IssuerC3.AI, INC.CIK 1577526

DirectorOfficer10% Owner· Chief Executive Officer

Since Dec 2020

-17.35K

Net shares

Net seller

$196.4K

Total sold

Open market trades

0B · 1S

Total transactions

12.38M acquired · 12.40M disposed

Non-Derivative Transactions5

Class A Common Stock

Direct

M · Option Exercise

+32.74K

Price / share

—

Trade value

—

% of position

4.5%

6/1/2026

722.36K→755.10K

Class A Common Stock

Direct

M · Option Exercise

+6.17M

Price / share

$11.16

Trade value

$68.82M

% of position

816.7%

6/1/2026

755.10K→6.92M

Class A Common Stock

Direct

S · Sale

−17.35K

Price / share

$11.32

Trade value

$196.40K

% of position

0.3%

6/2/2026

6.92M→6.90M

Class A Common Stock

Direct

G · Gift

−6.18M

Price / share

—

Trade value

—

% of position

89.5%

6/3/2026

6.90M→722.36K

Class A Common Stock

Indirect

G · Gift

+6.18M

Price / share

—

Trade value

—

% of position

858.5%

6/3/2026

720.10K→6.90M

Total

Net shares

+6.18M

Net value

$68.62M

Security	Date	Type	Shares	Price / Share	Trade Value	% of Position	Held Before	Held After
Class A Common Stock Direct	6/1/2026	M · Option Exercise	+32.74K	—	—	4.5%	722.36K	755.10K
Class A Common Stock Direct	6/1/2026	M · Option Exercise	+6.17M	$11.16	$68.82M	816.7%	755.10K	6.92M
Class A Common Stock Direct	6/2/2026	S · Sale	−17.35K	$11.32	$196.40K	0.3%	6.92M	6.90M
Class A Common Stock Direct	6/3/2026	G · Gift	−6.18M	—	—	89.5%	6.90M	722.36K
Class A Common Stock Indirect	6/3/2026	G · Gift	+6.18M	—	—	858.5%	720.10K	6.90M
Total			+6.18M		$68.62M

Derivative Transactions2

Restricted Stock Units

Direct

M · Option Exercise

Converts to

Class A Common Stock

32.74K shares

−32.74K

Strike price

Held after

65.47K

Exercisable

—

6/1/2026

Stock Option (Right to Buy)

Direct

M · Option Exercise

Converts to

Class A Common Stock

6.17M shares

−6.17M

Strike price

11.16

Held after

0.00

Exercisable

—

6/1/2026

Security	Converts To	Date	Type	Shares	Strike Price	Exercisable	Held After
Restricted Stock Units Direct	Class A Common Stock32.74K shares	6/1/2026	M · Option Exercise	−32.74K		—	65.47K
Stock Option (Right to Buy) Direct	Class A Common Stock6.17M shares	6/1/2026	M · Option Exercise	−6.17M	11.16	—	0.00

Non-Derivative Holdings (Post-Transaction)4

Class A Common Stock

Indirect

Shares owned1.24M

Class A Common Stock

Indirect

Shares owned9.22K

Class A Common Stock

Indirect

Shares owned170.29K

Class A Common Stock

Indirect

Shares owned72.69K

Total

1.49M indirect1.49M

Security Title	Shares Owned	Ownership Type
Class A Common Stock	1.24M	Indirect
Class A Common Stock	9.22K	Indirect
Class A Common Stock	170.29K	Indirect
Class A Common Stock	72.69K	Indirect
Total	1.49M	1.49M indirect

Derivative Holdings (Post-Transaction)0

No derivative holdings reported