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SEC EDGARSEP 171 min read$AI

SIEBEL THOMAS M sold $4.8M of AI

SIEBEL THOMAS M (CEO and Chairman of the Board) sold 444,248 shares of C3.ai, Inc. (AI) at an average of $10.77 ($10.54–$10.90, $4.78M total) across 2 trades over 2026-09-15 to 2026-09-16 under a Rule 10b5-1 trading plan.

Original reporting
SEC EDGAR · SIEBEL THOMAS M
Published Sep 17, 2026, 10:55 PM UTC
Analysis
AlphAI AI DeskAI-generated
Added to AlphAI Sep 17, 2026, 10:58 PM UTC. Informational, not investment advice.
How this was made
AlphAI summarizes source reporting and applies a structured AI analysis for relevance, timing, sentiment and ticker impact. Always verify material claims with the original publisher.
About AlphAI AI DeskScoring methodologyReport an issue
AlphAI market briefInsider activity
Primary signal
$AI
Bearish
medium confidence
Mentioned
$AI
Relevance
5/10
AlphAI data visualization · based on SEC EDGAR
Decision brief

The 30-second read

$AIBearishMed
01

Why it matters

The disclosed sale reduces the CEO's ownership and may trigger short‑term selling pressure.

02

Market read

Insider sales by top executives are closely watched by traders; this filing provides fresh data for short‑term positioning.

03

What to watch

The 10b5‑1 plan may have been set months ago; market may have already priced in the potential sale.

Relevance 5/10Novelty 6/10Timing: filing date 2026-09-17

Background

SEC Form 4 filing discloses insider transactions; this is the first public report of the sale.

Company-level read

Ticker impact

$AIBearishMedium confidence
Context

CEO Thomas Siebel sold 444,248 shares (~$4.8M) of C3.ai via a 10b5‑1 plan, reducing his stake to 722,362 shares.

Expected impact

Potential modest downside of 2‑4% over the next few days.

Evidence & confidence

CEO insider sales are closely watched; the size is material for a mid‑cap AI firm and the sale was executed at $10.54‑$10.90, near current market levels.

Market effects

Sector

May raise concerns for other AI‑focused tech stocks as insider confidence is scrutinized.

Regional

Limited to U.S. tech markets; no broader regional effect.

Global

Minimal global impact beyond AI sector investors.

Counterpoint

What could challenge this read

The sale could be a routine liquidity event under a pre‑arranged plan, not necessarily a bearish signal.

Key entities

  • Company
    C3.ai, Inc.

    AI software provider listed on NYSE under ticker AI.

  • Executive
    Thomas Siebel

    CEO and Chairman of C3.ai, 10% owner.

Read at source← All news

Full insider trading history

This story covers one filing. See everything behind it: every insider buy and sell on record, 10b5-1 plans, late filings, and which officers and directors are trading.

AI insider trading history →

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