# EDGAR Filing Document

**Accession Number:** 0001577526
**File Stem:** 0001031530-26-000007
**Filing Date:** 2026-5
**Character Count:** 18901
**Document Hash:** 6f3280241059250d0c9ee14e7f9d4da3
**Contains OCR:** False
**Source Format:** 

## Filing Content

## Filing Summary
**0001031530-26-000007.hdr.sgml**: 20260515

**ACCESSION NUMBER**: 0001031530-26-000007

**CONFORMED SUBMISSION TYPE**: SCHEDULE 13G/A

**PUBLIC DOCUMENT COUNT**: 1

**FILED AS OF DATE**: 20260515

**DATE AS OF CHANGE**: 20260515

**SUBJECT COMPANY**: 

**COMPANY DATA:**
- **COMPANY CONFORMED NAME:** C3.ai, Inc.
- **CENTRAL INDEX KEY:** 0001577526
- **STANDARD INDUSTRIAL CLASSIFICATION:** SERVICES-PREPACKAGED SOFTWARE [7372]
- **ORGANIZATION NAME:** 06 Technology
- **EIN:** 263999357
- **STATE OF INCORPORATION:** DE
- **FISCAL YEAR END:** 0430

**FILING VALUES:**
- **FORM TYPE:** SCHEDULE 13G/A
- **SEC ACT:** 1934 Act
- **SEC FILE NUMBER:** 005-92071
- **FILM NUMBER:** 26986850

**BUSINESS ADDRESS:**
- **STREET 1:** 1400 SEAPORT BLVD
- **CITY:** REDWOOD CITY
- **STATE:** CA
- **ZIP:** 94063
- **BUSINESS PHONE:** 650-503-2200

**MAIL ADDRESS:**
- **STREET 1:** 1400 SEAPORT BLVD
- **CITY:** REDWOOD CITY
- **STATE:** CA
- **ZIP:** 94063

**FORMER COMPANY:**
- **FORMER CONFORMED NAME:** C3 IoT, Inc.
- **DATE OF NAME CHANGE:** 20180123

**FORMER COMPANY:**
- **FORMER CONFORMED NAME:** C3, Inc.
- **DATE OF NAME CHANGE:** 20130522
**FILED BY**: 

**COMPANY DATA:**
- **COMPANY CONFORMED NAME:** SIEBEL THOMAS M
- **CENTRAL INDEX KEY:** 0001031530

**ORGANIZATION NAME:**

**FILING VALUES:**
- **FORM TYPE:** SCHEDULE 13G/A

**MAIL ADDRESS:**
- **STREET 1:** 1400 SEAPORT BLVD
- **CITY:** REDWOOD CITY
- **STATE:** CA
- **ZIP:** 94063

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

## SCHEDULE 13G

### Under the Securities Exchange Act of 1934

**(Amendment No. 6)**

**Issuer:** C3.ai, Inc.

**Title of Class of Securities:** Class A Common Stock, $0.001 par value per share

**CUSIP Number:** —

**Date of Event Which Requires Filing of this Statement:** 03/31/2026

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

- [ ] Rule 13d-1(b)

- [ ] Rule 13d-1(c)

- [x] Rule 13d-1(d)

---

| 1. | Names of Reporting Persons<br>Thomas M Siebel | Names of Reporting Persons<br>Thomas M Siebel |
|:---|:---|:---|:---|
| 2. | Check the Appropriate Box if a Member of a Group (See Instructions)<br>(a) [ ] (b) [ ] | Check the Appropriate Box if a Member of a Group (See Instructions)<br>(a) [ ] (b) [ ] |
| 3. | SEC Use Only | SEC Use Only |
| 4. | Citizenship or Place of Organization<br>X1 | Citizenship or Place of Organization<br>X1 |
| Number of<br>Shares<br>Beneficially<br>Owned by<br>Each<br>Reporting<br>Person<br>With | 5. | Sole Voting Power<br>25556651.00 |
| Number of<br>Shares<br>Beneficially<br>Owned by<br>Each<br>Reporting<br>Person<br>With | 6. | Shared Voting Power<br>0.00 |
| Number of<br>Shares<br>Beneficially<br>Owned by<br>Each<br>Reporting<br>Person<br>With | 7. | Sole Dispositive Power<br>25556651.00 |
| Number of<br>Shares<br>Beneficially<br>Owned by<br>Each<br>Reporting<br>Person<br>With | 8. | Shared Dispositive Power<br>0.00 |
| 9. | Aggregate Amount Beneficially Owned by Each Reporting Person<br>25556651.00 | Aggregate Amount Beneficially Owned by Each Reporting Person<br>25556651.00 |
| 10. | Check if the Aggregate Amount in Row (9) Excludes Certain Shares (See Instructions) [ ] | Check if the Aggregate Amount in Row (9) Excludes Certain Shares (See Instructions) [ ] |
| 11. | Percent of Class Represented by Amount in Row (9)<br>15.3% | Percent of Class Represented by Amount in Row (9)<br>15.3% |
| 12. | Type of Reporting Person (See Instructions)<br>IN | Type of Reporting Person (See Instructions)<br>IN |

---

| 1. | Names of Reporting Persons<br>The Siebel Living Trust u/a/d 7/27/93, as amended | Names of Reporting Persons<br>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)<br>(a) [ ] (b) [ ] | Check the Appropriate Box if a Member of a Group (See Instructions)<br>(a) [ ] (b) [ ] |
| 3. | SEC Use Only | SEC Use Only |
| 4. | Citizenship or Place of Organization<br>CA | Citizenship or Place of Organization<br>CA |
| Number of<br>Shares<br>Beneficially<br>Owned by<br>Each<br>Reporting<br>Person<br>With | 5. | Sole Voting Power<br>2767008.00 |
| Number of<br>Shares<br>Beneficially<br>Owned by<br>Each<br>Reporting<br>Person<br>With | 6. | Shared Voting Power<br>0.00 |
| Number of<br>Shares<br>Beneficially<br>Owned by<br>Each<br>Reporting<br>Person<br>With | 7. | Sole Dispositive Power<br>2767008.00 |
| Number of<br>Shares<br>Beneficially<br>Owned by<br>Each<br>Reporting<br>Person<br>With | 8. | Shared Dispositive Power<br>0.00 |
| 9. | Aggregate Amount Beneficially Owned by Each Reporting Person<br>2767008.00 | Aggregate Amount Beneficially Owned by Each Reporting Person<br>2767008.00 |
| 10. | Check if the Aggregate Amount in Row (9) Excludes Certain Shares (See Instructions) [ ] | Check if the Aggregate Amount in Row (9) Excludes Certain Shares (See Instructions) [ ] |
| 11. | Percent of Class Represented by Amount in Row (9)<br>1.9% | Percent of Class Represented by Amount in Row (9)<br>1.9% |
| 12. | Type of Reporting Person (See Instructions)<br>OO | Type of Reporting Person (See Instructions)<br>OO |

---

| 1. | Names of Reporting Persons<br>Siebel Asset Management, L.P. | Names of Reporting Persons<br>Siebel Asset Management, L.P. |
|:---|:---|:---|:---|
| 2. | Check the Appropriate Box if a Member of a Group (See Instructions)<br>(a) [ ] (b) [ ] | Check the Appropriate Box if a Member of a Group (See Instructions)<br>(a) [ ] (b) [ ] |
| 3. | SEC Use Only | SEC Use Only |
| 4. | Citizenship or Place of Organization<br>CA | Citizenship or Place of Organization<br>CA |
| Number of<br>Shares<br>Beneficially<br>Owned by<br>Each<br>Reporting<br>Person<br>With | 5. | Sole Voting Power<br>170294.00 |
| Number of<br>Shares<br>Beneficially<br>Owned by<br>Each<br>Reporting<br>Person<br>With | 6. | Shared Voting Power<br>0.00 |
| Number of<br>Shares<br>Beneficially<br>Owned by<br>Each<br>Reporting<br>Person<br>With | 7. | Sole Dispositive Power<br>170294.00 |
| Number of<br>Shares<br>Beneficially<br>Owned by<br>Each<br>Reporting<br>Person<br>With | 8. | Shared Dispositive Power<br>0.00 |
| 9. | Aggregate Amount Beneficially Owned by Each Reporting Person<br>170294.00 | Aggregate Amount Beneficially Owned by Each Reporting Person<br>170294.00 |
| 10. | Check if the Aggregate Amount in Row (9) Excludes Certain Shares (See Instructions) [ ] | Check if the Aggregate Amount in Row (9) Excludes Certain Shares (See Instructions) [ ] |
| 11. | Percent of Class Represented by Amount in Row (9)<br>0.1% | Percent of Class Represented by Amount in Row (9)<br>0.1% |
| 12. | Type of Reporting Person (See Instructions)<br>PN | Type of Reporting Person (See Instructions)<br>PN |

---

| 1. | Names of Reporting Persons<br>Siebel Asset Management III, L.P. | Names of Reporting Persons<br>Siebel Asset Management III, L.P. |
|:---|:---|:---|:---|
| 2. | Check the Appropriate Box if a Member of a Group (See Instructions)<br>(a) [ ] (b) [ ] | Check the Appropriate Box if a Member of a Group (See Instructions)<br>(a) [ ] (b) [ ] |
| 3. | SEC Use Only | SEC Use Only |
| 4. | Citizenship or Place of Organization<br>CA | Citizenship or Place of Organization<br>CA |
| Number of<br>Shares<br>Beneficially<br>Owned by<br>Each<br>Reporting<br>Person<br>With | 5. | Sole Voting Power<br>72695.00 |
| Number of<br>Shares<br>Beneficially<br>Owned by<br>Each<br>Reporting<br>Person<br>With | 6. | Shared Voting Power<br>0.00 |
| Number of<br>Shares<br>Beneficially<br>Owned by<br>Each<br>Reporting<br>Person<br>With | 7. | Sole Dispositive Power<br>72695.00 |
| Number of<br>Shares<br>Beneficially<br>Owned by<br>Each<br>Reporting<br>Person<br>With | 8. | Shared Dispositive Power<br>0.00 |
| 9. | Aggregate Amount Beneficially Owned by Each Reporting Person<br>72695.00 | Aggregate Amount Beneficially Owned by Each Reporting Person<br>72695.00 |
| 10. | Check if the Aggregate Amount in Row (9) Excludes Certain Shares (See Instructions) [ ] | Check if the Aggregate Amount in Row (9) Excludes Certain Shares (See Instructions) [ ] |
| 11. | Percent of Class Represented by Amount in Row (9)<br>0.1% | Percent of Class Represented by Amount in Row (9)<br>0.1% |
| 12. | Type of Reporting Person (See Instructions)<br>PN | Type of Reporting Person (See Instructions)<br>PN |

---

| 1. | Names of Reporting Persons<br>First Virtual Holdings, LLC | Names of Reporting Persons<br>First Virtual Holdings, LLC |
|:---|:---|:---|:---|
| 2. | Check the Appropriate Box if a Member of a Group (See Instructions)<br>(a) [ ] (b) [ ] | Check the Appropriate Box if a Member of a Group (See Instructions)<br>(a) [ ] (b) [ ] |
| 3. | SEC Use Only | SEC Use Only |
| 4. | Citizenship or Place of Organization<br>CA | Citizenship or Place of Organization<br>CA |
| Number of<br>Shares<br>Beneficially<br>Owned by<br>Each<br>Reporting<br>Person<br>With | 5. | Sole Voting Power<br>509216.00 |
| Number of<br>Shares<br>Beneficially<br>Owned by<br>Each<br>Reporting<br>Person<br>With | 6. | Shared Voting Power<br>0.00 |
| Number of<br>Shares<br>Beneficially<br>Owned by<br>Each<br>Reporting<br>Person<br>With | 7. | Sole Dispositive Power<br>509216.00 |
| Number of<br>Shares<br>Beneficially<br>Owned by<br>Each<br>Reporting<br>Person<br>With | 8. | Shared Dispositive Power<br>0.00 |
| 9. | Aggregate Amount Beneficially Owned by Each Reporting Person<br>509216.00 | Aggregate Amount Beneficially Owned by Each Reporting Person<br>509216.00 |
| 10. | Check if the Aggregate Amount in Row (9) Excludes Certain Shares (See Instructions) [ ] | Check if the Aggregate Amount in Row (9) Excludes Certain Shares (See Instructions) [ ] |
| 11. | Percent of Class Represented by Amount in Row (9)<br>0.4% | Percent of Class Represented by Amount in Row (9)<br>0.4% |
| 12. | Type of Reporting Person (See Instructions)<br>OO | Type of Reporting Person (See Instructions)<br>OO |

---

| 1. | Names of Reporting Persons<br>The Siebel 2011 Irrevocable Children's Trust | Names of Reporting Persons<br>The Siebel 2011 Irrevocable Children's Trust |
|:---|:---|:---|:---|
| 2. | Check the Appropriate Box if a Member of a Group (See Instructions)<br>(a) [ ] (b) [ ] | Check the Appropriate Box if a Member of a Group (See Instructions)<br>(a) [ ] (b) [ ] |
| 3. | SEC Use Only | SEC Use Only |
| 4. | Citizenship or Place of Organization<br>CA | Citizenship or Place of Organization<br>CA |
| Number of<br>Shares<br>Beneficially<br>Owned by<br>Each<br>Reporting<br>Person<br>With | 5. | Sole Voting Power<br>1237115.00 |
| Number of<br>Shares<br>Beneficially<br>Owned by<br>Each<br>Reporting<br>Person<br>With | 6. | Shared Voting Power<br>0.00 |
| Number of<br>Shares<br>Beneficially<br>Owned by<br>Each<br>Reporting<br>Person<br>With | 7. | Sole Dispositive Power<br>1237115.00 |
| Number of<br>Shares<br>Beneficially<br>Owned by<br>Each<br>Reporting<br>Person<br>With | 8. | Shared Dispositive Power<br>0.00 |
| 9. | Aggregate Amount Beneficially Owned by Each Reporting Person<br>1237115.00 | Aggregate Amount Beneficially Owned by Each Reporting Person<br>1237115.00 |
| 10. | Check if the Aggregate Amount in Row (9) Excludes Certain Shares (See Instructions) [ ] | Check if the Aggregate Amount in Row (9) Excludes Certain Shares (See Instructions) [ ] |
| 11. | Percent of Class Represented by Amount in Row (9)<br>0.9% | Percent of Class Represented by Amount in Row (9)<br>0.9% |
| 12. | Type of Reporting Person (See Instructions)<br>OO | Type of Reporting Person (See Instructions)<br>OO |

---

**Item 1(a). Name of Issuer:**
C3.ai, Inc.

**Item 1(b). Address of Issuer's Principal Executive Offices:**
1400 Seaport Blvd., Redwood City, CA, 94063.

**Item 2(a). Name of Person Filing:**
Thomas M. Siebel ("Thomas M. Siebel")
Siebel Living Trust 1993 Revocable Trust ("Living Trust")
Siebel Asset Management, L.P. ("SAM")
Siebel Asset Management III, L.P. ("SAM III")
First Virtual Holdings, LLC ("First Virtual")
The Siebel 2011 Irrevocable Children's Trust ("Children's Trust")

**Item 2(b). Address of Principal Business Office:**
c/o C3.ai, Inc.
1400 Seaport Blvd
Redwood City, CA 94063

**Item 2(c). Citizenship:**
Thomas M. Siebel is a citizen of the United States.  The other filers are each organized under the laws of the State of California.

**Item 2(d). Title of Class of Securities:**
Class A Common Stock, $0.001 par value per share

**Item 2(e). CUSIP Number:**
—

**Item 3. If this statement is filed pursuant to §§ 240.13d-1(b) or 240.13d-2(b) or (c), check whether the person filing is a:**

(a) [ ] Broker or dealer registered under section 15 of the Act (15 U.S.C. 78o).

(b) [ ] Bank as defined in section 3(a)(6) of the Act (15 U.S.C. 78c).

(c) [ ] Insurance company as defined in section 3(a)(19) of the Act (15 U.S.C. 78c).

(d) [ ] Investment company registered under section 8 of the Investment Company Act of 1940 (15 U.S.C. 80a-8).

(e) [ ] An investment adviser in accordance with § 240.13d-1(b)(1)(ii)(E);

(f) [ ] An employee benefit plan or endowment fund in accordance with § 240.13d-1(b)(1)(ii)(F);

(g) [ ] A parent holding company or control person in accordance with § 240.13d-1(b)(1)(ii)(G);

(h) [ ] A savings associations as defined in Section 3(b) of the Federal Deposit Insurance Act (12 U.S.C. 1813);

(i) [ ] A church plan that is excluded from the definition of an investment company under section 3(c)(14) of the Investment Company Act of 1940 (15 U.S.C. 80a-3);

(j) [ ] A non-U.S. institution in accordance with § 240.13d-1(b)(1)(ii)(J), if filing as a non-U.S. institution in accordance with § 240.13d-1(b)(1)(ii)(J), please specify the type of institution:

(k) [ ] Group, in accordance with Rule 240.13d-1(b)(1)(ii)(K).

**Item 4. Ownership:**

**(a) Amount beneficially owned:**

As of March 31, 2026: 3,072,820 shares of the Issuer's Class B Common Stock and 22,483,831 shares of the Issuer's Class A Common Stock, of which (a) 2,072,820 shares of Class B Common Stock and 694,188 shares of Class A Common Stock were held by Living Trust, for which Mr. Siebel serves as trustee, (b) 170,294 shares of Class A Common Stock were held by SAM, for which Mr. Siebel serves as the general partner, (c) 72,695 shares of Class  A  Common  Stock  were  held  by  SAM  III,  for  which  Mr.  Siebel  serves  as  the  general  partner,  (d)  500,000 shares of Class B Common Stock and 9,216 shares of Class A Common Stock were held by First Virtual, for which Mr. Siebel serves as Chairman, (e) 1,237,115 shares of Class A Common Stock were held by Children's Trust, of which Mr. Siebel is trustee, (f) 500,000 shares of Class B Common Stock and 9,216 shares of Class A Common Stock over which Mr. Siebel holds an irrevocable proxy pursuant to a voting agreement between Mr. Siebel and Patricia  A.  House,  (g)  20,237,982  shares  of  Class  A  Common  Stock  that  could  be  issued  to  Mr.  Siebel  in connection with the exercise of stock options within 60 days of March 31, 2026 and (h) 53,125 shares of Class A Common Stock that could be issued to Mr. Siebel in connection with the vesting of restricted stock units within 60 days of March 31, 2026. The Class B Common Stock is convertible at the holder's option into the Issuer's Class A Common Stock on a 1-for-1 basis. The holders of Class B Common Stock are entitled to 50 votes per share and the holders of Class A Common Stock are entitled to one vote per share.

**(b) Percent of class:**

As of March 31, 2026:
(A) Thomas M. Siebel beneficially owned 15.3% of the Issuer's outstanding Class A Common Stock;
(B) Living Trust beneficially owned 1.9% of the Issuer's outstanding Class A Common Stock;
(C) SAM beneficially owned 0.1% of the Issuer's outstanding Class A Common Stock;
(D) SAM III beneficially owned 0.1% of the Issuer's outstanding Class A Common Stock;
(E) First Virtual beneficially owned 0.4% of the Issuer's outstanding Class A Common Stock;and (F) Children's Trust beneficially owned 0.9% of the Issuer's outstanding Class A Common Stock.
This Amendment No. 6 to Schedule 13G is being filed to report a decrease in Thomas M. Siebel's beneficial ownership of the Issuer's Class A Common Stock (compared to the ownership information last reported on that certain Amendment No. 5 to Schedule 13G filed November 14, 2025) of approximately 1.3%.

**(c) Number of shares as to which the person has:**

**(i) Sole power to vote or to direct the vote:**

Thomas M. Siebel: 25,556,651
Living Trust:  2,767,008
SAM:  170,294
SAM III:  72,695
First Virtual:  509,216
Children's Trust:  1,237,115

**(ii) Shared power to vote or to direct the vote:**

Thomas M. Siebel: 0
Living Trust:  0
SAM:  0
SAM III:  0
First Virtual:  0
Children's Trust:  0

**(iii) Sole power to dispose or to direct the disposition of:**

Thomas M. Siebel: 25,556,651
Living Trust:  2,767,008
SAM:  170,294
SAM III:  72,695
First Virtual:  509,216
Children's Trust:  1,237,115

**(iv) Shared power to dispose or to direct the disposition of:**

Thomas M. Siebel: 0
Living Trust:  0
SAM:  0
SAM III:  0
First Virtual:  0
Children's Trust:  0

**Item 5. Ownership of Five Percent or Less of a Class.**

[x] If this statement is being filed to report the fact that as of the date hereof the reporting person has ceased to be the beneficial owner of more than five percent of the class of securities, check the following.

**Item 6. Ownership of More than 5 Percent on Behalf of Another Person.**

Not Applicable

**Item 7. Identification and Classification of the Subsidiary**

Not Applicable

**Item 8. Identification and Classification of Members of the Group**

Not Applicable

**Item 9. Notice of Dissolution of Group**

Not Applicable

**Item 10. Certification:**

—

### 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**

**Date:** 05/15/2026

**By:** /s/ Thomas M. Siebel

**Name & Title:** Thomas M. Siebel

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

**Date:** 05/15/2026

**By:** /s/ Thomas M. Siebel

**Name & Title:** Thomas M. Siebel, Trustee of The Siebel Living Trust u/a/d 7/27/93, as amended

**Siebel Asset Management, L.P.**

**Date:** 05/15/2026

**By:** /s/ Thomas M. Siebel

**Name & Title:** Thomas M. Siebel, General Partner

**Siebel Asset Management III, L.P.**

**Date:** 05/15/2026

**By:** /s/ Thomas M. Siebel

**Name & Title:** Thomas M. Siebel, General Partner

**First Virtual Holdings, LLC**

**Date:** 05/15/2026

**By:** /s/ Thomas M. Siebel

**Name & Title:** Thomas M. Siebel, Chairman

**The Siebel 2011 Irrevocable Children's Trust**

**Date:** 05/15/2026

**By:** /s/ Thomas M. Siebel

**Name & Title:** Thomas M. Siebel, Trustee of The Siebel 2011 Irrevocable Children's Trust