C3.ai (AI) 13G/A: Thomas Siebel reports 17.2% ownership

C3.ai, Inc. (AI) disclosed updated ownership in an Amendment No. 5 to Schedule 13G. Thomas M. Siebel reported beneficial ownership of 27,368,188 Class A shares, representing 17.2% of the class as of the stated event date.

Rhea-AI Filing Summary

C3.ai, Inc. (AI) disclosed updated ownership in an Amendment No. 5 to Schedule 13G. Thomas M. Siebel reported beneficial ownership of 27,368,188 Class A shares, representing 17.2% of the class as of the stated event date.

Related reporting persons and their respective holdings include: The Siebel Living Trust with 4,582,922 shares (3.3%), Siebel Asset Management, L.P. with 170,294 (0.1%), Siebel Asset Management III, L.P. with 72,695 (0.1%), First Virtual Holdings, LLC with 509,216 (0.4%), and The Siebel 2011 Irrevocable Children's Trust with 1,237,115 (0.9%).

FAQ

What stake did Thomas M. Siebel report in C3.ai (AI)?

He reported beneficial ownership of 27,368,188 Class A shares, or 17.2% of the class.

Which class of securities is covered in this 13G/A for AI?

It covers Class A Common Stock, $0.001 par value per share.

What are the holdings of The Siebel Living Trust in AI?

The Siebel Living Trust reported 4,582,922 shares, or 3.3%.

How many AI shares does First Virtual Holdings, LLC report?

First Virtual Holdings, LLC reported 509,216 shares, or 0.4%.

What is the reported ownership by Siebel Asset Management, L.P.?

Siebel Asset Management, L.P. reported 170,294 shares, or 0.1%.

What is the date of the event requiring this filing for AI?

The event date is 09/30/2025.

Who signed the filing for the reporting persons?

It was signed by Thomas M. Siebel in various reported capacities.

AI-generated analysis. How Rhea-AI works. Not financial advice.

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Accepted by SEC EDGAR 11/14/2025 - 06:06 PM Learn about SEC filing dates

SECURITIES AND EXCHANGE COMMISSION
Washington, D.C. 20549

SCHEDULE 13G

UNDER THE SECURITIES EXCHANGE ACT OF 1934

(Amendment No. 5)

C3.AI, INC.

(Name of Issuer)

Class A Common Stock, $0.001 par value per share

(Title of Class of Securities)

12468P104

(CUSIP Number)

09/30/2025

(Date of Event Which Requires Filing of this Statement)

Check the appropriate box to designate the rule pursuant to which this Schedule is filed:

Rule 13d-1(b)

Rule 13d-1(c)

Rule 13d-1(d)

SCHEDULE 13G

CUSIP No. 12468P104

1

Names of Reporting Persons

THOMAS M SIEBEL

2

Check the appropriate box if a member of a Group (see instructions)

(a)
(b)

3

Sec Use Only

4

Citizenship or Place of Organization

UNITED STATES

Number of Shares Beneficially Owned by Each Reporting Person With:

5	Sole Voting Power 27,368,188.00
6	Shared Voting Power 0.00
7	Sole Dispositive Power 27,368,188.00
8	Shared Dispositive Power 0.00

9

Aggregate Amount Beneficially Owned by Each Reporting Person

27,368,188.00

10

Check box if the aggregate amount in row (9) excludes certain shares (See Instructions)

11

Percent of class represented by amount in row (9)

17.2 %

12

Type of Reporting Person (See Instructions)

IN

SCHEDULE 13G

CUSIP No. 12468P104

1

Names of Reporting Persons

The Siebel Living Trust u/a/d 7/27/93, as amended

2

Check the appropriate box if a member of a Group (see instructions)

(a)
(b)

3

Sec Use Only

4

Citizenship or Place of Organization

CALIFORNIA

Number of Shares Beneficially Owned by Each Reporting Person With:

5	Sole Voting Power 4,582,922.00
6	Shared Voting Power 0.00
7	Sole Dispositive Power 4,582,922.00
8	Shared Dispositive Power 0.00

9

Aggregate Amount Beneficially Owned by Each Reporting Person

4,582,922.00

10

Check box if the aggregate amount in row (9) excludes certain shares (See Instructions)

11

Percent of class represented by amount in row (9)

3.3 %

12

Type of Reporting Person (See Instructions)

OO

SCHEDULE 13G

CUSIP No. 12468P104

1

Names of Reporting Persons

Siebel Asset Management, L.P.

2

Check the appropriate box if a member of a Group (see instructions)

(a)
(b)

3

Sec Use Only

4

Citizenship or Place of Organization

CALIFORNIA

Number of Shares Beneficially Owned by Each Reporting Person With:

5	Sole Voting Power 170,294.00
6	Shared Voting Power 0.00
7	Sole Dispositive Power 170,294.00
8	Shared Dispositive Power 0.00

9

Aggregate Amount Beneficially Owned by Each Reporting Person

170,294.00

10

Check box if the aggregate amount in row (9) excludes certain shares (See Instructions)

11

Percent of class represented by amount in row (9)

0.1 %

12

Type of Reporting Person (See Instructions)

PN

SCHEDULE 13G

CUSIP No. 12468P104

1

Names of Reporting Persons

Siebel Asset Management III, L.P.

2

Check the appropriate box if a member of a Group (see instructions)

(a)
(b)

3

Sec Use Only

4

Citizenship or Place of Organization

CALIFORNIA

Number of Shares Beneficially Owned by Each Reporting Person With:

5	Sole Voting Power 72,695.00
6	Shared Voting Power 0.00
7	Sole Dispositive Power 72,695.00
8	Shared Dispositive Power 0.00

9

Aggregate Amount Beneficially Owned by Each Reporting Person

72,695.00

10

Check box if the aggregate amount in row (9) excludes certain shares (See Instructions)

11

Percent of class represented by amount in row (9)

0.1 %

12

Type of Reporting Person (See Instructions)

PN

SCHEDULE 13G

CUSIP No. 12468P104

1

Names of Reporting Persons

First Virtual Holdings, LLC

2

Check the appropriate box if a member of a Group (see instructions)

(a)
(b)

3

Sec Use Only

4

Citizenship or Place of Organization

CALIFORNIA

Number of Shares Beneficially Owned by Each Reporting Person With:

5	Sole Voting Power 509,216.00
6	Shared Voting Power 0.00
7	Sole Dispositive Power 509,216.00
8	Shared Dispositive Power 0.00

9

Aggregate Amount Beneficially Owned by Each Reporting Person

509,216.00

10

Check box if the aggregate amount in row (9) excludes certain shares (See Instructions)

11

Percent of class represented by amount in row (9)

0.4 %

12

Type of Reporting Person (See Instructions)

OO

SCHEDULE 13G

CUSIP No. 12468P104

1

Names of Reporting Persons

The Siebel 2011 Irrevocable Children's Trust

2

Check the appropriate box if a member of a Group (see instructions)

(a)
(b)

3

Sec Use Only

4

Citizenship or Place of Organization

CALIFORNIA

Number of Shares Beneficially Owned by Each Reporting Person With:

5	Sole Voting Power 1,237,115.00
6	Shared Voting Power 0.00
7	Sole Dispositive Power 1,237,115.00
8	Shared Dispositive Power 0.00

9

Aggregate Amount Beneficially Owned by Each Reporting Person

1,237,115.00

10

Check box if the aggregate amount in row (9) excludes certain shares (See Instructions)

11

Percent of class represented by amount in row (9)

0.9 %

12

Type of Reporting Person (See Instructions)

OO

SCHEDULE 13G

Item 1.
(a)	Name of issuer: C3.AI, INC.
(b)	Address of issuer's principal executive offices: 1400 SEAPORT BLVD, REDWOOD CITY, CA, 94063.
Item 2.
(a)	Name of person filing:
(b)	Address or principal business office or, if none, residence:
(c)	Citizenship:
(d)	Title of class of securities: Class A Common Stock, $0.001 par value per share
(e)	CUSIP No.: 12468P104
Item 4.	Ownership
(a)	Amount beneficially owned:
(b)	Percent of class:
(c)	Number of shares as to which the person has:
	(i) Sole power to vote or to direct the vote:
	(ii) Shared power to vote or to direct the vote:
	(iii) Sole power to dispose or to direct the disposition of:
	(iv) Shared power to dispose or to direct the disposition of:

Item 10.	Certifications:
	Not Applicable

SIGNATURE

After reasonable inquiry and to the best of my knowledge and belief, I certify that the information set forth in this statement is true, complete and correct.

THOMAS M SIEBEL

Signature:	/s/ Thomas M. Siebel
Name/Title:	Thomas M. Siebel
Date:	11/14/2025

The Siebel Living Trust u/a/d 7/27/93, as amended

Signature:	/s/ Thomas M. Siebel
Name/Title:	By: Thomas M. Siebel, Trustee of The Siebel Living Trust u/a/d 7/27/93, as amended
Date:	11/14/2025

Siebel Asset Management, L.P.

Signature:	/s/ Thomas M. Siebel
Name/Title:	By: Thomas M. Siebel, Trustee of The Siebel Living Trust u/a/d 7/27/93, as amended
Date:	11/14/2025

Siebel Asset Management III, L.P.

Signature:	/s/ Thomas M. Siebel
Name/Title:	By: Thomas M. Siebel, Trustee of The Siebel Living Trust u/a/d 7/27/93, as amended
Date:	11/14/2025

First Virtual Holdings, LLC

Signature:	/s/ Thomas M. Siebel
Name/Title:	By: Thomas M. Siebel, Chairman
Date:	11/14/2025

The Siebel 2011 Irrevocable Children's Trust

Signature:	/s/ Thomas M. Siebel
Name/Title:	By: Thomas M. Siebel, Co-Trustee
Date:	11/14/2025