Sell4

C3.ai, Inc.

Total Value

$8.2M

Net $4.8M sold

Filing Date

Sep 17, 2026

2 transactions

Sales

$4.8M

2 transactions

Trade Summary

On Sep 15, 2026 through Sep 16, 2026, SIEBEL THOMAS M, CEO and Chairman of the Board, Director, 10% Owner, sold $8.2M of C3.ai, Inc. (AI) across 2 transactions. The filing covers Class A Common Stock and reflects net selling of $4.8M. Reported prices ranged from $3.90 to $10.90. Insider transactions are sourced from SEC Form 4 disclosures and should be reviewed alongside company fundamentals and the insider's broader trading history.

Price at the Time of the Trade

AI daily price with the insider's sale marked at $10.77.

Sold in the upper half of the 6-month range · the stock trades 2% lower today.

Price data is delayed and provided for context only — not investment advice.

Insider Information

Name: SIEBEL THOMAS M
Role: CEO and Chairman of the Board, Director, 10% Owner
Location: REDWOOD CITY, CA

Filing Details

Filing Date: Sep 17, 2026
Transaction Date: Sep 15, 2026
Accession Number: 0001577526-26-000130
Form Type: 4
Net Trading Amount: -$4.8M

Non-Derivative Transactions

Date	Security	Shares	Price	Type	Value
Sep 15, 2026	Class A Common Stock	282,001	$3.90	Exercise	$1.1M
Sep 15, 2026	Class A Common Stock	282,001	$10.90	Sale	$3.1M
Sep 16, 2026	Class A Common Stock	162,247	$3.90	Exercise	$632.8K
Sep 16, 2026	Class A Common Stock	162,247	$10.54	Sale	$1.7M

Derivative Transactions

Date	Security	Shares	Exercise Price	Type	Value
Sep 15, 2026	AI derivative	282,001	$3.90	Exercise	$1.1M
Sep 16, 2026	AI derivative	162,247	$3.90	Exercise	$632.8K

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Footnotes

(F1)The transaction being reported was effected pursuant to a previously established Rule 10b5-1 trading plan dated September 20, 2024.
(F2)The price reported is a weighted-average price. These shares were sold in multiple transactions at prices ranging from $10.76 to $11.04, inclusive. The Reporting Person will provide upon request to the staff of the Securities and Exchange Commission, the Issuer or any security holder of the Issuer, full information regarding the number of shares sold at each separate price.
(F3)The price reported is a weighted-average price. These shares were sold in multiple transactions at prices ranging from $10.35 to $10.68, inclusive. The Reporting Person will provide upon request to the staff of the Securities and Exchange Commission, the Issuer or any security holder of the Issuer, full information regarding the number of shares sold at each separate price.
(F4)The shares are held by The Siebel Living Trust u/a/d 7/27/93, as amended, of which the Reporting Person is trustee.
(F5)The shares are held by First Virtual Holdings, LLC, of which the Reporting Person is Chairman.
(F6)The shares are held by Siebel Asset Management, L.P., of which the Reporting Person is the general partner.
(F7)The shares are held by Siebel Asset Management III, L.P., of which the Reporting Person is the general partner.
(F8)The shares are held by The Siebel 2011 Irrevocable Children's Trust, of which the Reporting Person is co-trustee.
(F9)Fully vested.

SEC Form 4

FORM 4

UNITED STATES SECURITIES AND EXCHANGE COMMISSION
Washington, D.C. 20549

STATEMENT OF CHANGES IN BENEFICIAL OWNERSHIP

Filed pursuant to Section 16(a) of the Securities Exchange Act of 1934
or Section 30(h) of the Investment Company Act of 1940

OMB APPROVAL

OMB Number:			3235-0287
Estimated average burden
hours per response:			0.5

Check this box if no longer subject to Section 16. Form 4 or Form 5 obligations may continue. See Instruction 1(b).

Check this box to indicate that a transaction was made pursuant to a contract, instruction or written plan for the purchase or sale of equity securities of the issuer that is intended to satisfy the affirmative defense conditions of Rule 10b5-1(c). See Instruction 10.

1. Name and Address of Reporting Person^*

SIEBEL THOMAS M

(Last)

(First)

(Middle)

C/O C3.AI, INC.

1400 SEAPORT BLVD, SUITE 500

(Street)

REDWOOD CITY

94603

(City)

(State)

(Zip)

2. Issuer Name and Ticker or Trading Symbol
C3.ai, Inc. [ AI ]

5. Relationship of Reporting Person(s) to Issuer
(Check all applicable)

X	Director	X	10% Owner
X	Officer (give title below)		Other (specify below)
	CEO and Chairman of the Board

3. Date of Earliest Transaction (Month/Day/Year)
09/15/2026

4. If Amendment, Date of Original Filed (Month/Day/Year)

6. Individual or Joint/Group Filing (Check Applicable Line)

X	Form filed by One Reporting Person
	Form filed by More than One Reporting Person

Table I - Non-Derivative Securities Acquired, Disposed of, or Beneficially Owned
1. Title of Security (Instr. 3)	2. Transaction Date (Month/Day/Year)	2A. Deemed Execution Date, if any (Month/Day/Year)	3. Transaction Code (Instr. 8)		4. Securities Acquired (A) or Disposed Of (D) (Instr. 3, 4 and 5)			5. Amount of Securities Beneficially Owned Following Reported Transaction(s) (Instr. 3 and 4)	6. Ownership Form: Direct (D) or Indirect (I) (Instr. 4)	7. Nature of Indirect Beneficial Ownership (Instr. 4)
1. Title of Security (Instr. 3)	2. Transaction Date (Month/Day/Year)	2A. Deemed Execution Date, if any (Month/Day/Year)	Code	V	Amount	(A) or (D)	Price		6. Ownership Form: Direct (D) or Indirect (I) (Instr. 4)	7. Nature of Indirect Beneficial Ownership (Instr. 4)
Class A Common Stock	09/15/2026		M⁽¹⁾		282,001	A	$3.9	1,004,363	D
Class A Common Stock	09/15/2026		S⁽¹⁾		282,001	D	$10.9⁽²⁾	722,362	D
Class A Common Stock	09/16/2026		M⁽¹⁾		162,247	A	$3.9	884,609	D
Class A Common Stock	09/16/2026		S⁽¹⁾		162,247	D	$10.54⁽³⁾	722,362	D
Class A Common Stock								7,105,019	I	See Footnote⁽⁴⁾
Class A Common Stock								9,216	I	See Footnote⁽⁵⁾
Class A Common Stock								170,294	I	See Footnote⁽⁶⁾
Class A Common Stock								72,695	I	See Footnote⁽⁷⁾
Class A Common Stock								1,237,115	I	See Footnote⁽⁸⁾

Table II - Derivative Securities Acquired, Disposed of, or Beneficially Owned (e.g., puts, calls, warrants, options, convertible securities)
1. Title of Derivative Security (Instr. 3)	2. Conversion or Exercise Price of Derivative Security	3. Transaction Date (Month/Day/Year)	3A. Deemed Execution Date, if any (Month/Day/Year)	4. Transaction Code (Instr. 8)		5. Number of Derivative Securities Acquired (A) or Disposed of (D) (Instr. 3, 4 and 5)		6. Date Exercisable and Expiration Date (Month/Day/Year)		7. Title and Amount of Securities Underlying Derivative Security (Instr. 3 and 4)		8. Price of Derivative Security (Instr. 5)	9. Number of derivative Securities Beneficially Owned Following Reported Transaction(s) (Instr. 4)	10. Ownership Form: Direct (D) or Indirect (I) (Instr. 4)	11. Nature of Indirect Beneficial Ownership (Instr. 4)
1. Title of Derivative Security (Instr. 3)	2. Conversion or Exercise Price of Derivative Security	3. Transaction Date (Month/Day/Year)	3A. Deemed Execution Date, if any (Month/Day/Year)	Code	V	(A)	(D)	Date Exercisable	Expiration Date	Title	Amount or Number of Shares	8. Price of Derivative Security (Instr. 5)		10. Ownership Form: Direct (D) or Indirect (I) (Instr. 4)	11. Nature of Indirect Beneficial Ownership (Instr. 4)
Stock Option (Right to Buy)	$3.9	09/15/2026		M⁽¹⁾			282,001	⁽⁹⁾	11/27/2028	Class A Common Stock	282,001	$0	2,131,195	D
Stock Option (Right to Buy)	$3.9	09/16/2026		M⁽¹⁾			162,247	⁽⁹⁾	11/27/2028	Class A Common Stock	162,247	$0	1,968,948	D

Explanation of Responses:

1. The transaction being reported was effected pursuant to a previously established Rule 10b5-1 trading plan dated September 20, 2024.

2. The price reported is a weighted-average price. These shares were sold in multiple transactions at prices ranging from $10.76 to $11.04, inclusive. The Reporting Person will provide upon request to the staff of the Securities and Exchange Commission, the Issuer or any security holder of the Issuer, full information regarding the number of shares sold at each separate price.

3. The price reported is a weighted-average price. These shares were sold in multiple transactions at prices ranging from $10.35 to $10.68, inclusive. The Reporting Person will provide upon request to the staff of the Securities and Exchange Commission, the Issuer or any security holder of the Issuer, full information regarding the number of shares sold at each separate price.

4. The shares are held by The Siebel Living Trust u/a/d 7/27/93, as amended, of which the Reporting Person is trustee.

5. The shares are held by First Virtual Holdings, LLC, of which the Reporting Person is Chairman.

6. The shares are held by Siebel Asset Management, L.P., of which the Reporting Person is the general partner.

7. The shares are held by Siebel Asset Management III, L.P., of which the Reporting Person is the general partner.

8. The shares are held by The Siebel 2011 Irrevocable Children's Trust, of which the Reporting Person is co-trustee.

9. Fully vested.

Remarks:

	/s/ Tom MacMitchell, Attorney-in-Fact	09/17/2026
	** Signature of Reporting Person	Date
Reminder: Report on a separate line for each class of securities beneficially owned directly or indirectly.
* If the form is filed by more than one reporting person, see Instruction 4 (b)(v).
** Intentional misstatements or omissions of facts constitute Federal Criminal Violations See 18 U.S.C. 1001 and 15 U.S.C. 78ff(a).
Note: File three copies of this Form, one of which must be manually signed. If space is insufficient, see Instruction 6 for procedure.
Persons who respond to the collection of information contained in this form are not required to respond unless the form displays a currently valid OMB Number.

Form 4 as rendered by the SEC from accession 0001577526-26-000130.

C3.ai, Inc.

Trade Summary

Price at the Time of the Trade

Company Information

Insider Information

Filing Details

Non-Derivative Transactions

Derivative Transactions

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Footnotes

SEC Form 4

SEC Filing

SEC Form 4

Price at the Time of the Trade