C3.ai (NYSE: AI) chair sells 491,467 shares after option exercises

Rhea-AI Filing Summary

C3.ai, Inc. Executive Chairman Thomas M. Siebel reported option exercises and share sales in Class A Common Stock. On April 13 and 14, 2026, he exercised stock options to acquire a total of 491,467 shares at an exercise price of $2.04 per share.

He then sold 326,189 shares at a weighted-average price of $8.31 on April 13 and 165,278 shares at a weighted-average price of $8.49 on April 14 in open-market transactions. Following these transactions, his directly held Class A Common Stock position was 722,362 shares, and the filing also lists several indirect holdings through trusts and affiliated entities. The transactions were effected under a previously established Rule 10b5-1 trading plan dated September 20, 2024.

Insider Trade Summary 10b5-1

Net Seller: 491,467 shares ($4,113,841)

Net Sell 11 txns

Insider SIEBEL THOMAS M

Role Executive Chairman

Sold 491,467 shs ($4.11M)

Type	Security	Shares	Price	Value
Exercise	Stock Option (Right to Buy)	165,278	$0.00	--
Exercise	Class A Common Stock	165,278	$2.04	$337K
Sale	Class A Common Stock	165,278	$8.49	$1.40M
Exercise	Stock Option (Right to Buy)	326,189	$0.00	--
Exercise	Class A Common Stock	326,189	$2.04	$665K
Sale	Class A Common Stock	326,189	$8.31	$2.71M
holding	Class A Common Stock	--	--	--
holding	Class A Common Stock	--	--	--
holding	Class A Common Stock	--	--	--
holding	Class A Common Stock	--	--	--
holding	Class A Common Stock	--	--	--

Holdings After Transaction: Stock Option (Right to Buy) — 1,282,718 shares (Direct); Class A Common Stock — 887,640 shares (Direct); Class A Common Stock — 694,188 shares (Indirect, See Footnote)

Footnotes (1)

1. The transaction being reported was effected pursuant to a previously established Rule 10b5-1 trading plan dated September 20, 2024. The price reported is a weighted-average price. These shares were sold in multiple transactions at prices ranging from $7.92 to $8.52, 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. The price reported is a weighted-average price. These shares were sold in multiple transactions at prices ranging from $8.37 to $8.74, 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. The shares are held by The Siebel Living Trust u/a/d 7/27/93, as amended, of which the Reporting Person is trustee. The shares are held by First Virtual Holdings, LLC, of which the Reporting Person is Chairman. The shares are held by Siebel Asset Management, L.P., of which the Reporting Person is the general partner. The shares are held by Siebel Asset Management III, L.P., of which the Reporting Person is the general partner. The shares are held by The Siebel 2011 Irrevocable Children's Trust, of which the Reporting Person is co-trustee. Fully vested.

Key Figures

Options exercised (April 13): 326,189 shares at $2.04 Options exercised (April 14): 165,278 shares at $2.04 Shares sold (April 13): 326,189 shares at $8.31 +4 more

7 metrics

Options exercised (April 13) 326,189 shares at $2.04 Stock Option (Right to Buy) into Class A Common Stock

Options exercised (April 14) 165,278 shares at $2.04 Stock Option (Right to Buy) into Class A Common Stock

Shares sold (April 13) 326,189 shares at $8.31 Weighted-average sale price in open-market transactions

Shares sold (April 14) 165,278 shares at $8.49 Weighted-average sale price in open-market transactions

Net shares exercised 491,467 shares Total underlying Class A Common Stock from option exercises

Direct shares after transactions 722,362 shares Class A Common Stock directly owned post-transaction

Rule 10b5-1 plan date September 20, 2024 Previously established trading plan governing these trades

Key Terms

Rule 10b5-1 trading plan, weighted-average price, Stock Option (Right to Buy, Class A Common Stock, +1 more

5 terms

Rule 10b5-1 trading plan regulatory

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

A Rule 10b5-1 trading plan is a pre-arranged schedule that allows company insiders to buy or sell stock at specific times, even if they have inside information. It helps prevent accusations of unfair trading by making these transactions look planned and transparent, rather than sneaky or illegal.

weighted-average price financial

"The price reported is a weighted-average price. These shares were sold in multiple transactions at prices ranging from $7.92 to $8.52, inclusive."

Stock Option (Right to Buy financial

""security_title": "Stock Option (Right to Buy)""

Class A Common Stock financial

""underlying_security_title": "Class A Common Stock""

Class A common stock is a category of a company’s shares that carries a specific set of ownership rights—most commonly defined voting power and claims on dividends—set out in the company’s charter. For investors it matters because the class determines how much influence you have over corporate decisions, the share’s likely dividend and trading behavior, and how it compares in value to other share classes, like choosing a particular seat with different privileges at the company’s decision-making table.

irrevocable trust financial

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

Form 4 Insider Transactions: What Each Field Means →

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).

X

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 CALIFORNIA 94603

(City) (State) (Zip)

UNITED STATES

(Country)

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)
	Executive Chairman

2a. Foreign Trading Symbol

3. Date of Earliest Transaction (Month/Day/Year)
04/13/2026

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

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

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

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)
			Code	V	Amount	(A) or (D)	Price
Class A Common Stock	04/13/2026		M(1)		326,189	A	$2.04	1,048,551	D
Class A Common Stock	04/13/2026		S(1)		326,189	D	$8.31(2)	722,362	D
Class A Common Stock	04/14/2026		M(1)		165,278	A	$2.04	887,640	D
Class A Common Stock	04/14/2026		S(1)		165,278	D	$8.49(3)	722,362	D
Class A Common Stock								694,188	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)
				Code	V	(A)	(D)	Date Exercisable	Expiration Date	Title	Amount or Number of Shares
Stock Option (Right to Buy)	$2.04	04/13/2026		M(1)			326,189	(9)	11/07/2027	Class A Common Stock	326,189	$0	1,447,996	D
Stock Option (Right to Buy)	$2.04	04/14/2026		M(1)			165,278	(9)	11/07/2027	Class A Common Stock	165,278	$0	1,282,718	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 $7.92 to $8.52, 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 $8.37 to $8.74, 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/ Sasha Pesic, Attorney-in-Fact	04/15/2026
	** 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: SEC 1474 (03-26)

FAQ

What did C3.ai (AI) Executive Chairman Thomas Siebel do in this Form 4?

Thomas Siebel exercised stock options and sold C3.ai Class A Common Stock. He exercised options for 491,467 shares at $2.04 per share and sold the same number of shares in open-market transactions over two days, while retaining a substantial direct and indirect ownership stake.

How many C3.ai (AI) shares did Thomas Siebel sell and at what prices?

He sold 326,189 C3.ai Class A shares at a weighted-average price of $8.31 and 165,278 shares at a weighted-average price of $8.49. Both were reported as open-market or private sales, with detailed price breakdowns available upon request as noted in the filing.

What options did Thomas Siebel exercise in C3.ai (AI) stock?

Siebel exercised stock options labeled as “Stock Option (Right to Buy)” for 326,189 underlying shares and 165,278 underlying shares of Class A Common Stock. Each block was exercised at an exercise price of $2.04 per share, converting derivative positions into directly held common shares.

How many C3.ai (AI) shares does Thomas Siebel hold after these transactions?

After the reported transactions, Siebel directly held 722,362 shares of C3.ai Class A Common Stock. The filing also reports additional indirect holdings through various trusts and investment entities associated with him, reflecting further economic exposure beyond his direct ownership position.

Were Thomas Siebel’s C3.ai (AI) share sales under a Rule 10b5-1 plan?

Yes. The filing states the transactions were executed under a previously established Rule 10b5-1 trading plan dated September 20, 2024. Such plans pre-schedule trades, indicating these sales were arranged in advance rather than timed in response to short-term market developments.

What does the weighted-average price mean in this C3.ai (AI) Form 4?

Weighted-average price means each reported sale price reflects multiple trades at different prices averaged together. For Siebel’s sales, the filing notes ranges of $7.92–$8.52 and $8.37–$8.74, and offers to provide the exact share counts at each individual price level upon request.