13F Pro

SEC Form 4 reporting owner

Siebel Thomas M

Siebel Thomas M has filed 54 Form 4 transactions reported between December 1, 2025 and September 16, 2026, as CEO and Chairman of the Board, Executive Chairman of C3.ai, Inc..

Name as filed: SIEBEL THOMAS M

Open-market buys, 24 mo
None
reported
Open-market sales, 24 mo
$15.5M
14 lines
Companies
1
with Form 4 filings
Latest transaction
Sep 16, 2026
transaction date

Roles and reported holdings

  • AIC3.ai, Inc.
    Dec 1, 2025 – Sep 16, 2026

    CEO and Chairman of the Board, Executive Chairman

    Held directly722,362 sh as of Sep 14, 2026 · Form 4
    Held indirectly (latest line)632,256 sh as of Jan 13, 2026 · Form 4

    24 months: $15.5M sold

Transaction history

All 54 reported transactions, newest first. Every row links to the Form 4 on SEC EDGAR.

DateCompanyTypeSharesValueFiling
Sep 16, 2026AICEO and Chairman of the BoardOption exerciseCode M · direct162,247$633K@ $3.90Form 4
Sep 15, 2026AICEO and Chairman of the BoardOption exerciseCode M · direct282,001$1.1M@ $3.90Form 4
Sep 14, 2026AICEO and Chairman of the BoardGiftCode G · direct21,986—Form 4
Sep 14, 2026AICEO and Chairman of the BoardOpen-market saleCode S · direct22,780$241K@ $10.56Form 4
Sep 11, 2026AICEO and Chairman of the BoardOption exerciseCode M · direct44,766—Form 4
Sep 3, 2026AICEO and Chairman of the BoardGiftCode G · direct15,846—Form 4
Sep 2, 2026AICEO and Chairman of the BoardOpen-market saleCode S · direct16,890$174K@ $10.30Form 4
Sep 1, 2026AICEO and Chairman of the BoardOption exerciseCode M · direct32,736—Form 4
Aug 11, 2026AICEO and Chairman of the BoardOption exerciseCode M · direct453,314$1.8M@ $3.90Form 4
Aug 4, 2026AICEO and Chairman of the BoardGiftCode G · direct143,834—Form 4
Aug 3, 2026AICEO and Chairman of the BoardOpen-market saleCode S · direct139,500$1.3M@ $9.61Form 4
Aug 2, 2026AICEO and Chairman of the BoardOption exerciseCode M · direct283,334—Form 4
Jul 15, 2026AICEO and Chairman of the BoardOption exerciseCode M · direct133,490$521K@ $3.90Form 4
Jul 15, 2026AICEO and Chairman of the BoardOption exerciseCode M · direct64,975$133K@ $2.04Form 4
Jul 14, 2026AICEO and Chairman of the BoardOption exerciseCode M · direct264,100$539K@ $2.04Form 4
Jun 15, 2026AICEO and Chairman of the BoardOption exerciseCode M · direct472,005$963K@ $2.04Form 4
Jun 15, 2026AICEO and Chairman of the BoardGiftCode G · direct21,197—Form 4
Jun 12, 2026AICEO and Chairman of the BoardOpen-market saleCode S · direct23,570$257K@ $10.92Form 4
Jun 11, 2026AICEO and Chairman of the BoardOption exerciseCode M · direct44,767—Form 4
Jun 3, 2026AICEO and Chairman of the BoardGiftCode G · direct6,182,053—Form 4
Jun 2, 2026AICEO and Chairman of the BoardOpen-market saleCode S · direct17,350$196K@ $11.32Form 4
Jun 1, 2026AICEO and Chairman of the BoardOption exerciseCode M · direct6,166,667$68.8M@ $11.16Form 4
Jun 1, 2026AICEO and Chairman of the BoardOption exerciseCode M · direct32,736—Form 4
May 18, 2026AICEO and Chairman of the BoardOption exerciseCode M · direct112,014$229K@ $2.04Form 4
May 15, 2026AICEO and Chairman of the BoardOption exerciseCode M · direct369,624$754K@ $2.04Form 4
May 5, 2026AIExecutive ChairmanGiftCode G · direct25,915—Form 4
May 4, 2026AIExecutive ChairmanOpen-market saleCode S · direct27,210$252K@ $9.27Form 4
May 1, 2026AIExecutive ChairmanOption exerciseCode M · direct53,125—Form 4
Apr 14, 2026AIExecutive ChairmanOption exerciseCode M · direct165,278$337K@ $2.04Form 4
Apr 13, 2026AIExecutive ChairmanOption exerciseCode M · direct326,189$665K@ $2.04Form 4
Mar 18, 2026AIExecutive ChairmanOption exerciseCode M · direct219,294$447K@ $2.04Form 4
Mar 17, 2026AIExecutive ChairmanOption exerciseCode M · direct282,203$576K@ $2.04Form 4
Mar 13, 2026AIExecutive ChairmanGiftCode G · direct21,331—Form 4
Mar 12, 2026AIExecutive ChairmanOpen-market saleCode S · direct23,435$213K@ $9.11Form 4
Mar 11, 2026AIExecutive ChairmanOption exerciseCode M · direct44,766—Form 4
Mar 3, 2026AIExecutive ChairmanGiftCode G · direct15,081—Form 4
Mar 2, 2026AIExecutive ChairmanOpen-market saleCode S · direct17,655$138K@ $7.79Form 4
Mar 1, 2026AIExecutive ChairmanOption exerciseCode M · direct32,736—Form 4
Feb 10, 2026AIExecutive ChairmanOption exerciseCode M · direct511,732$1.0M@ $2.04Form 4
Feb 3, 2026AIExecutive ChairmanGiftCode G · direct25,520—Form 4
Feb 2, 2026AIExecutive ChairmanOpen-market saleCode S · direct27,605$298K@ $10.81Form 4
Feb 1, 2026AIExecutive ChairmanOption exerciseCode M · direct53,125—Form 4
Jan 13, 2026AIExecutive ChairmanOpen-market saleCode S · indirect309,589$4.2M@ $13.52Form 4
Jan 13, 2026AIExecutive ChairmanOption exerciseCode M · direct212,586$434K@ $2.04Form 4
Dec 17, 2025AIExecutive ChairmanOpen-market saleCode S · indirect140,768$2.0M@ $14.22Form 4
Dec 16, 2025AIExecutive ChairmanOpen-market saleCode S · indirect392,064$5.6M@ $14.37Form 4
Dec 15, 2025AIExecutive ChairmanGiftCode G · direct21,767—Form 4
Dec 12, 2025AIExecutive ChairmanOpen-market saleCode S · direct23,000$367K@ $15.94Form 4
Dec 11, 2025AIExecutive ChairmanGrant or awardCode A · direct1,133,474—Form 4
Dec 11, 2025AIExecutive ChairmanGrant or awardCode A · direct722,362—Form 4
Dec 11, 2025AIExecutive ChairmanOption exerciseCode M · direct44,767—Form 4
Dec 3, 2025AIExecutive ChairmanGiftCode G · direct15,736—Form 4
Dec 2, 2025AIExecutive ChairmanOpen-market saleCode S · direct17,000$242K@ $14.21Form 4
Dec 1, 2025AIExecutive ChairmanOption exerciseCode M · direct32,736—Form 4

How this page is built

Every row comes from a Form 4 filed with the SEC, which officers, directors and holders of more than 10% of a company’s stock must file within two business days of a trade. Transactions are grouped by the reporting owner’s name as filed (spacing, capitals and punctuation ignored); two different people filing under an identical name would appear together, and one person filing under two spellings appears on two pages.

Open-market totals count code P purchases and code S sales over the last 24 months. The same trade reported on more than one filing is counted once; when another owner (for example a fund and its general partner) reports the identical trade, they are listed beside it. Holdings are the shares owned after the latest purchase, sale, gift or tax-withholding line, shown separately for direct and indirect ownership; an indirect figure is one holding line, not a total across every trust or entity.

This page describes what was filed with the SEC; it is not investment advice or a recommendation to buy or sell any security.