# C3.ai executive stock transactions

> Live situation record from CLSTR: https://clstr.news/situations/c3ai-executive-stock-transactions
> Updated: 2026-09-26T02:14:35.000Z. Sources: 3. Developments: 2.

In mid-September 2026, executives at C3.ai, Inc. conducted several stock transactions. CEO and Chairman Thomas Siebel disposed of 66,752 shares, including 22,780 sold and 43,972 gifted, to satisfy non-discretionary tax withholding obligations following the vesting of equity awards. CFO Hitesh Lath also sold 21,077 shares to cover tax requirements.

Subsequent reports indicated that Siebel executed further sales of 444,248 shares in mid-September under a Rule 10b5-1 trading plan, generating approximately $4.78 million in gross proceeds. Following these transactions, Siebel retained direct ownership of 722,362 shares.

## Timeline

### 2026-09-26: Ciena and C3.ai executives execute significant stock sales

Executives at Ciena Corporation and C3.ai have conducted significant stock sales, with Ciena director Thomas Nevens selling $1.34 million in shares and C3.ai CEO Thomas Siebel offloading $4.78 million.

2 sources. https://clstr.news/cluster/ciena-and-c3ai-executives-execute-significant-stock-sales

### 2026-09-16: C3.ai executives sell shares to cover tax withholding obligations

C3.ai executives Thomas Siebel and Hitesh Lath have disposed of company shares to cover tax withholding obligations following the vesting of equity awards.

2 sources. https://clstr.news/cluster/c3ai-executives-sell-shares-to-cover-tax-withholding-obligations

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Cite as: C3.ai executive stock transactions. CLSTR, https://clstr.news/situations/c3ai-executive-stock-transactions