SIEBEL THOMAS M (Chief Executive Officer) sold 3.1% of their position (23.43K shares) of C3.AI, INC. on the open market

Open‑market sale worth $213.5K — a minor trim. Review remaining holdings and any 10b5‑1 plan disclosures.

S · 1 sale

SIEBEL THOMAS M

Filed: 3/13/2026ACC: 0001577526-26-000026

InsiderSIEBEL THOMAS MCIK 1031530

→

IssuerC3.AI, INC.CIK 1577526

DirectorOfficer10% Owner· Chief Executive Officer

Since Dec 2020

-23.43K

Net shares

Net seller

$213.5K

Total sold

Open market trades

0B · 1S

Total transactions

66.10K acquired · 89.53K disposed

Non-Derivative Transactions4

Class A Common Stock

Direct

M · Option Exercise

+44.77K

Price / share

—

Trade value

—

% of position

6.2%

3/11/2026

722.36K→767.13K

Class A Common Stock

Direct

S · Sale

−23.43K

Price / share

$9.11

Trade value

$213.49K

% of position

3.1%

3/12/2026

767.13K→743.69K

Class A Common Stock

Direct

G · Gift

−21.33K

Price / share

—

Trade value

—

% of position

2.9%

3/13/2026

743.69K→722.36K

Class A Common Stock

Indirect

G · Gift

+21.33K

Price / share

—

Trade value

—

% of position

3.2%

3/13/2026

672.86K→694.19K

Total

Net shares

+21.33K

Net value

-$213.49K

Security	Date	Type	Shares	Price / Share	Trade Value	% of Position	Held Before	Held After
Class A Common Stock Direct	3/11/2026	M · Option Exercise	+44.77K	—	—	6.2%	722.36K	767.13K
Class A Common Stock Direct	3/12/2026	S · Sale	−23.43K	$9.11	$213.49K	3.1%	767.13K	743.69K
Class A Common Stock Direct	3/13/2026	G · Gift	−21.33K	—	—	2.9%	743.69K	722.36K
Class A Common Stock Indirect	3/13/2026	G · Gift	+21.33K	—	—	3.2%	672.86K	694.19K
Total			+21.33K		-$213.49K

Derivative Transactions1

Restricted Stock Units

Direct

M · Option Exercise

Converts to

Class A Common Stock

44.77K shares

−44.77K

Strike price

Held after

268.76K

Exercisable

—

3/11/2026

Security	Converts To	Date	Type	Shares	Strike Price	Exercisable	Held After
Restricted Stock Units Direct	Class A Common Stock44.77K shares	3/11/2026	M · Option Exercise	−44.77K		—	268.76K

Non-Derivative Holdings (Post-Transaction)4

Class A Common Stock

Indirect

Shares owned1.24M

Class A Common Stock

Indirect

Shares owned170.29K

Class A Common Stock

Indirect

Shares owned72.69K

Class A Common Stock

Indirect

Shares owned9.22K

Total

1.49M indirect1.49M

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

Derivative Holdings (Post-Transaction)0

No derivative holdings reported