SIEBEL THOMAS M (Chief Executive Officer) sold 2.2% of their position (16.89K shares) of C3.AI, INC. on the open market

Open‑market sale worth $174.0K — a minor trim. Review remaining holdings and any 10b5‑1 plan disclosures.

S · 1 sale

SIEBEL THOMAS M

Filed: 9/3/2026ACC: 0001577526-26-000121

InsiderSIEBEL THOMAS MCIK 1031530

→

IssuerC3.AI, INC.CIK 1577526

DirectorOfficer10% Owner· Chief Executive Officer

Since Dec 2020

-16.89K

Net shares

Net seller

$174.0K

Total sold

Open market trades

0B · 1S

Total transactions

48.58K acquired · 65.47K disposed

Non-Derivative Transactions4

Class A Common Stock

Direct

M · Option Exercise

+32.74K

Price / share

—

Trade value

—

% of position

4.5%

9/1/2026

722.36K→755.10K

Class A Common Stock

Direct

S · Sale

−16.89K

Price / share

$10.30

Trade value

$173.97K

% of position

2.2%

9/2/2026

755.10K→738.21K

Class A Common Stock

Direct

G · Gift

−15.85K

Price / share

—

Trade value

—

% of position

2.1%

9/3/2026

738.21K→722.36K

Class A Common Stock

Indirect

G · Gift

+15.85K

Price / share

—

Trade value

—

% of position

0.2%

9/3/2026

7.07M→7.08M

Total

Net shares

+15.85K

Net value

-$173.97K

Security	Date	Type	Shares	Price / Share	Trade Value	% of Position	Held Before	Held After
Class A Common Stock Direct	9/1/2026	M · Option Exercise	+32.74K	—	—	4.5%	722.36K	755.10K
Class A Common Stock Direct	9/2/2026	S · Sale	−16.89K	$10.30	$173.97K	2.2%	755.10K	738.21K
Class A Common Stock Direct	9/3/2026	G · Gift	−15.85K	—	—	2.1%	738.21K	722.36K
Class A Common Stock Indirect	9/3/2026	G · Gift	+15.85K	—	—	0.2%	7.07M	7.08M
Total			+15.85K		-$173.97K

Derivative Transactions1

Restricted Stock Units

Direct

M · Option Exercise

Converts to

Class A Common Stock

32.74K shares

−32.74K

Strike price

Held after

32.74K

Exercisable

—

9/1/2026

Security	Converts To	Date	Type	Shares	Strike Price	Exercisable	Held After
Restricted Stock Units Direct	Class A Common Stock32.74K shares	9/1/2026	M · Option Exercise	−32.74K		—	32.74K

Non-Derivative Holdings (Post-Transaction)4

Class A Common Stock

Indirect

Shares owned170.29K

Class A Common Stock

Indirect

Shares owned72.69K

Class A Common Stock

Indirect

Shares owned9.22K

Class A Common Stock

Indirect

Shares owned1.24M

Total

1.49M indirect1.49M

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

Derivative Holdings (Post-Transaction)0

No derivative holdings reported