SIEBEL THOMAS M (Chief Executive Officer) sold 40.7% of their position (495.57K shares) of C3.AI, INC. on the open market

Open‑market sale worth $5.50M — a major position exit. Review remaining holdings and any 10b5‑1 plan disclosures.

S · 2 sales

SIEBEL THOMAS M

Filed: 6/16/2026ACC: 0001577526-26-000060

InsiderSIEBEL THOMAS MCIK 1031530

→

IssuerC3.AI, INC.CIK 1577526

DirectorOfficer10% Owner· Chief Executive Officer

Since Dec 2020

-495.57K

Net shares

Net seller

$5.50M

Total sold

Open market trades

0B · 2S

Total transactions

537.97K acquired · 1.03M disposed

Non-Derivative Transactions6

Class A Common Stock

Direct

M · Option Exercise

+44.77K

Price / share

—

Trade value

—

% of position

6.2%

6/11/2026

722.36K→767.13K

Class A Common Stock

Direct

S · Sale

−23.57K

Price / share

$10.92

Trade value

$257.38K

% of position

3.1%

6/12/2026

767.13K→743.56K

Class A Common Stock

Direct

G · Gift

−21.20K

Price / share

—

Trade value

—

% of position

2.9%

6/15/2026

743.56K→722.36K

Class A Common Stock

Indirect

G · Gift

+21.20K

Price / share

—

Trade value

—

% of position

0.3%

6/15/2026

6.90M→6.92M

Class A Common Stock

Direct

M · Option Exercise

+472K

Price / share

$2.04

Trade value

$962.89K

% of position

65.3%

6/15/2026

722.36K→1.19M

Class A Common Stock

Direct

S · Sale

−472K

Price / share

$11.11

Trade value

$5.24M

% of position

39.5%

6/15/2026

1.19M→722.36K

Total

Net shares

+21.20K

Net value

-$4.54M

Security	Date	Type	Shares	Price / Share	Trade Value	% of Position	Held Before	Held After
Class A Common Stock Direct	6/11/2026	M · Option Exercise	+44.77K	—	—	6.2%	722.36K	767.13K
Class A Common Stock Direct	6/12/2026	S · Sale	−23.57K	$10.92	$257.38K	3.1%	767.13K	743.56K
Class A Common Stock Direct	6/15/2026	G · Gift	−21.20K	—	—	2.9%	743.56K	722.36K
Class A Common Stock Indirect	6/15/2026	G · Gift	+21.20K	—	—	0.3%	6.90M	6.92M
Class A Common Stock Direct	6/15/2026	M · Option Exercise	+472K	$2.04	$962.89K	65.3%	722.36K	1.19M
Class A Common Stock Direct	6/15/2026	S · Sale	−472K	$11.11	$5.24M	39.5%	1.19M	722.36K
Total			+21.20K		-$4.54M

Derivative Transactions2

Restricted Stock Units

Direct

M · Option Exercise

Converts to

Class A Common Stock

44.77K shares

−44.77K

Strike price

Held after

223.99K

Exercisable

—

6/11/2026

Stock Option (Right to Buy)

Direct

M · Option Exercise

Converts to

Class A Common Stock

472K shares

−472K

Strike price

2.04

Held after

329.07K

Exercisable

—

6/15/2026

Security	Converts To	Date	Type	Shares	Strike Price	Exercisable	Held After
Restricted Stock Units Direct	Class A Common Stock44.77K shares	6/11/2026	M · Option Exercise	−44.77K		—	223.99K
Stock Option (Right to Buy) Direct	Class A Common Stock472K shares	6/15/2026	M · Option Exercise	−472K	2.04	—	329.07K

Non-Derivative Holdings (Post-Transaction)4

Class A Common Stock

Indirect

Shares owned9.22K

Class A Common Stock

Indirect

Shares owned1.24M

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	9.22K	Indirect
Class A Common Stock	1.24M	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