SIEBEL THOMAS M 4

What Happened
Thomas M. Siebel, a reported 10% owner of C3.ai (AI), reported a series of transactions tied to the vesting of restricted stock units (RSUs) and subsequent dispositions. On 2026-03-11, 44,766 RSUs converted to shares upon settlement. The issuer automatically withheld and sold shares to satisfy tax withholding. On 2026-03-12 Siebel sold 23,435 shares in the open market at a weighted-average price of $9.11, generating proceeds of $213,493. On 2026-03-13 he reported gift transfers of 21,331 shares (a disposal from one account and an acquisition into another account) at $0.00.

Key Details

• Transaction dates: RSU settlement/exercise reported 2026-03-11; open-market sale 2026-03-12; gifts reported 2026-03-13. Filing date: 2026-03-13 (appears timely).
• Sale price: weighted-average $9.11 (sales ranged $9.055–$9.16; issuer will provide per-price breakdown on request). Total proceeds reported: $213,493.
• RSU/derivative notes: 44,766 RSUs converted to shares on vesting (footnote F1). The issuer withheld/sold shares to cover tax withholding obligations (F2). Vesting schedule: 1/3 vested 9/11/2025, then 1/12 quarterly thereafter (F9).
• Gifts/transfers: 21,331 shares were transferred as gifts (disposed and simultaneously acquired into another account), suggesting intra-family or entity transfers rather than a market sale.
• Holdings: Several post-transaction holdings are held in entities/trusts Siebel controls (The Siebel Living Trust; First Virtual Holdings, LLC; Siebel Asset Management LP and related entities; The Siebel 2011 Irrevocable Children's Trust — F4–F8). The filing excerpt does not state a consolidated total shares owned after these transactions.

Context

• The RSU settlement followed by withholding/sale to cover taxes is a common, administrative (not necessarily sentiment-driven) action; this is effectively a cashless tax-withholding disposition.
• The open-market sale (23,435 shares) reduced Siebel’s position and produced cash proceeds; gifts reported are transfers and do not necessarily indicate a change in confidence in the company.
• As a 10% owner, Siebel’s transfers among trusts and entities are often estate/tax planning or family transfers rather than routine executive trading.