FilingsForm 4

Thomas Siebel sold 491,467 C3.ai shares for $4.11 million from Apr 13 to Apr 14, 2026

From the public record1 min read

Published Oct 28, 2026 · 09:46 UTCFiled Apr 15, 2026

Value$4.11 million

Shares491,467

Average price$8.37

FiledApr 15

Written by Claude Sonnet 5.5, an AI model, from public records. Each figure in it was checked automatically against the source's text or our database before it was published.

A Form 4, the form an insider files when trading a company's shares, showed Thomas Siebel selling 491,467 Class A shares of C3.ai from Apr 13 to Apr 14, 2026, at an average $8.37 a share, or $4.11 million. The form listed exercises of stock options for 326,189 shares on Apr 13 and 165,278 shares on Apr 14, the days of its two sale lines, and stated 722,362 shares held directly after the last sale line. The form named Siebel as a director, an officer (Executive Chairman) and an owner of more than 10% of the shares, and a footnote said the reported transactions were made under a previously established Rule 10b5-1 trading plan dated Sep 20, 2024. The source is the Form 4 filed with the SEC on Apr 15, 2026.1 2 3 4 5 6 7 8 9 10 11 12 13 14 15 16

How each figure was checked16 facts

C3.ai Form 4 0001577526-26-000042: ownerThomas Siebel (filed as SIEBEL THOMAS M)Our database
C3.ai Form 4 0001577526-26-000042: sidesaleOur database
C3.ai Form 4 0001577526-26-000042: shares491,467Our database
C3.ai Form 4 0001577526-26-000042: average price$8.37Our database
C3.ai Form 4 0001577526-26-000042: value$4.11 millionOur database
C3.ai Form 4 0001577526-26-000042: first dateApr 13, 2026Our database
C3.ai Form 4 0001577526-26-000042: last dateApr 14, 2026Our database
C3.ai Form 4 0001577526-26-000042, line 1exercise of a derivative security (code M): 326,189 shares acquired on Apr 13, 2026 at $2.04 per share; held directly; 1,048,551 owned after the lineOur database
C3.ai Form 4 0001577526-26-000042, line 3exercise of a derivative security (code M): 165,278 shares acquired on Apr 14, 2026 at $2.04 per share; held directly; 887,640 owned after the lineOur database
C3.ai Form 4 0001577526-26-000042, derivative line 1derivative line, exercise of a derivative security (code M): 326,189 shares disposed on Apr 13, 2026 at $0 per share; held directly; 1,447,996 owned after the lineOur database
C3.ai Form 4 0001577526-26-000042, derivative line 2derivative line, exercise of a derivative security (code M): 165,278 shares disposed on Apr 14, 2026 at $0 per share; held directly; 1,282,718 owned after the lineOur database
C3.ai Form 4 0001577526-26-000042: shares afterafter the last sale line the form states 722362 shares of Class A Common Stock held directlyOur database
C3.ai Form 4 0001577526-26-000042: holding2 sale lines held directlyOur database
C3.ai Form 4 0001577526-26-000042: relationshipdirector, officer (Executive Chairman) and owner of more than 10% of the sharesOur database
Footnote F1 of the Form 4 filed Apr 15, 2026 (it is attached to that document's line N1, N2, N3, N4, D1, D2)September 20, 2024Footnotes and remarks of the Form 4 filed Apr 15, 2026 ↗
C3.ai Form 4 0001577526-26-000042: filed onApr 15, 2026Our database

The record

Issuer: C3.ai (CIK 1577526, filed as C3.ai, Inc.)
Form: 4
Accession: 0001577526-26-000042
Filed: Apr 15, 2026
Period of report: Apr 13, 2026
Reporting owner: Thomas Siebel (CIK 1031530, filed as SIEBEL THOMAS M)
Relationship: director, officer (Executive Chairman) and owner of more than 10% of the shares
Rule 10b5-1 checkbox: Ticked
Line 1: M (exercise of a derivative security) · 326,189 Class A Common Stock at $2.04 · Apr 13, 2026 · acquired, directly · 1,048,551 held after · footnote F1
Line 2: S (sale) · 326,189 Class A Common Stock at $8.31 · Apr 13, 2026 · disposed, directly · 722,362 held after · footnotes F1 and F2
Line 3: M (exercise of a derivative security) · 165,278 Class A Common Stock at $2.04 · Apr 14, 2026 · acquired, directly · 887,640 held after · footnote F1
Line 4: S (sale) · 165,278 Class A Common Stock at $8.49 · Apr 14, 2026 · disposed, directly · 722,362 held after · footnotes F1 and F3
Derivative line 1: M (exercise of a derivative security) · 326,189 Stock Option (Right to Buy) at $0.00 · Apr 13, 2026 · disposed, directly · 1,447,996 held after · footnotes F1 and F9
Derivative line 2: M (exercise of a derivative security) · 165,278 Stock Option (Right to Buy) at $0.00 · Apr 14, 2026 · disposed, directly · 1,282,718 held after · footnotes F1 and F9
Footnote F1: The transaction being reported was effected pursuant to a previously established Rule 10b5-1 trading plan dated September 20, 2024.
Footnote F2: 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.
Footnote F3: 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.
Footnote 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.
Footnote F5: The shares are held by First Virtual Holdings, LLC, of which the Reporting Person is Chairman.
Footnote F6: The shares are held by Siebel Asset Management, L.P., of which the Reporting Person is the general partner.
Footnote F7: The shares are held by Siebel Asset Management III, L.P., of which the Reporting Person is the general partner.
Footnote F8: The shares are held by The Siebel 2011 Irrevocable Children's Trust, of which the Reporting Person is co-trustee.
Footnote F9: Fully vested.