Black Maria sold $8.4M of ADP
Black Maria (President & CEO) sold 29,810 shares of AUTOMATIC DATA PROCESSING INC (ADP) at an average of $280.91 ($278.59–$281.86, $8.37M total) across 14 trades on 2026-09-02 under a Rule 10b5-1 trading plan.
How this was made
The 30-second read
Why it matters
The transaction provides fresh data on insider holdings and may influence short‑term trading sentiment.
Market read
Primary insider sell; modest negative bias for ADP stock.
What to watch
Potential upcoming earnings release or strategic initiatives not disclosed could offset the sell pressure.
Background
Form 4 filings disclose insider transactions; a CEO sell of $8.4M is notable for a large‑cap employer services firm.
Ticker impact
CEO Black Maria sold 29,810 shares for $8.37M via a 10b5‑1 plan, reducing his stake to 80,624 shares.
Possible modest downside of 1‑2% over the next few days.
The sale size is material for a large cap and executed through a pre‑arranged plan, suggesting a neutral to slightly negative market reaction.
Market effects
Minimal impact on the broader HR‑tech sector; insider sales are company‑specific.
US market only; no regional ripple.
Low global relevance.
Counterpoint
The sale is pre‑arranged under a 10b5‑1 plan and may not reflect personal sentiment; the stock could remain stable.
Key entities
- PersonBlack Maria
President & CEO of Automatic Data Processing Inc.



