AUTOMATIC DATA PROCESSING INC Insider Trading Activity
Every SEC Form 4 insider transaction reported for AUTOMATIC DATA PROCESSING INC (ADP), sourced directly from SEC EDGAR and updated as new filings are accepted.
By Trabud · Insider-trading data from SEC EDGAR
Latest filing:
Compiled automatically from SEC EDGAR Form 4 filings and refreshed daily. Figures count purchases (code P) and sales (code S) only — not grants, option exercises, or gifts. How this page is built. Not investment advice.
Quick Answer
Are ADP insiders buying or selling?
In the last 12 months, AUTOMATIC DATA PROCESSING INC insiders reported 1 open-market purchase ($745.7K) and 18 sales ($13.8M) — net selling of $13.1M. Since January 2018, Trabud has recorded 296 Form 4 filings for ADP: 1 buys ($745.7K) and 295 sells ($721.8M).
Source: SEC EDGAR Form 4
What stands out
- The largest open-market purchase in the last 12 months was $745.7K by Robert Holmes Swan (Director) on May 11, 2026. SEC ↗
- The most recent open-market purchase was reported on May 11, 2026 (5 months ago).
Key Statistics (January 2018 – Sep 4, 2026)
Total Form 4 filings
296
SEC EDGAR
Insider filers
29
Insider buys (1)
$745.7K
Insider sells (295)
$721.8M
Insider sentiment
Net sellingNet insider flow of $721.0M in net selling since January 2018, and $13.1M in net selling over the last 12 months.
Recent ADP insider transactions
| Date | Insider | Role | Type | Shares | Price | Value | Filing |
|---|---|---|---|---|---|---|---|
| Sep 4, 2026 | Joseph Desilva | Executive VP | Sale | 631 | $282.87 | $178.5K | SEC ↗ |
| Sep 3, 2026 | David Foskett | Corp. VP | Sale | 1.5K | $283.00 | $432.7K | SEC ↗ |
| Sep 3, 2026 | Joseph Desilva | Executive VP | Sale | 6.5K | $283.00 | $1.8M | SEC ↗ |
| Sep 3, 2026 | Christopher D'Ambrosio | Corp. VP | Sale | 1.9K | $283.00 | $529.8K | SEC ↗ |
| Sep 3, 2026 | Maria Black | President & CEO | Sale | 29.8K | $280.91 | $8.4M | SEC ↗ |
| Aug 24, 2026 | Brian L. Michaud | Executive VP | Sale | 120 | $279.70 | $33.6K | SEC ↗ |
| Aug 24, 2026 | David Kwon | Corp VP | Sale | 798 | $280.00 | $223.4K | SEC ↗ |
| Jul 31, 2026 | David Kwon | Corp VP | Sale | 2.4K | $265.62 | $641.2K | SEC ↗ |
| May 11, 2026 | Robert Holmes Swan | Director | Purchase | 3.6K | $206.05 | $745.7K | SEC ↗ |
| May 11, 2026 | Brian L. Michaud | Executive VP | Sale | 848 | $212.13 | $179.9K | SEC ↗ |
| Apr 15, 2026 | Christopher D'Ambrosio | Corp. VP | Sale | 543 | $195.74 | $106.3K | SEC ↗ |
| Mar 17, 2026 | Christopher D'Ambrosio | Corp. VP | Sale | 543 | $208.45 | $113.2K | SEC ↗ |
| Feb 18, 2026 | Christopher D'Ambrosio | Corp. VP | Sale | 543 | $212.43 | $115.3K | SEC ↗ |
| Feb 9, 2026 | Brian L. Michaud | Executive VP | Sale | 1.0K | $234.18 | $234.2K | SEC ↗ |
| Feb 9, 2026 | David Foskett | Corp. VP | Sale | 266 | $237.00 | $63.0K | SEC ↗ |
| Jan 14, 2026 | Christopher D'Ambrosio | Corp. VP | Sale | 543 | $262.29 | $142.4K | SEC ↗ |
| Jan 14, 2026 | David Kwon | Corp VP | Sale | 806 | $264.80 | $213.4K | SEC ↗ |
| Jan 8, 2026 | David Kwon | Corp VP | Sale | 900 | $260.00 | $234.0K | SEC ↗ |
| Jan 6, 2026 | Maria Black | President & CEO | Sale | 715 | $257.17 | $183.9K | SEC ↗ |
| Sep 15, 2025 | Carlos A Rodriguez | Director | Sale | 4.1K | $295.26 | $1.2M | SEC ↗ |
| Sep 11, 2025 | Christopher D'Ambrosio | Corp. VP | Sale | 597 | $296.90 | $177.2K | SEC ↗ |
| Sep 11, 2025 | Michael A Bonarti | Corporate Vice President | Sale | 8.7K | $298.43 | $2.6M | SEC ↗ |
| Sep 11, 2025 | Carlos A Rodriguez | Director | Sale | 43.9K | $295.05 | $13.0M | SEC ↗ |
| Sep 8, 2025 | Carlos A Rodriguez | Director | Sale | 12.1K | $297.12 | $3.6M | SEC ↗ |
| Sep 5, 2025 | Maria Black | President & CEO | Sale | 23.6K | $298.32 | $7.0M | SEC ↗ |
Showing the 25 most recent of 296 Form 4 filings for AUTOMATIC DATA PROCESSING INC.
Most active ADP insiders
- Carlos A Rodriguez32 filings
- Maria Black22 filings
- Joseph Desilva19 filings
- Michael A Bonarti19 filings
- John Ayala18 filings
Ask anything about ADP insider activity
Use Trabud's AI agent to query AUTOMATIC DATA PROCESSING INC's Form 4 history in plain English — "Show me ADP CEO purchases this year" or compare it against any other ticker.
Open the AI agentADP insider trading FAQ
Are AUTOMATIC DATA PROCESSING INC insiders buying or selling?
In the last 12 months, AUTOMATIC DATA PROCESSING INC insiders reported 1 open-market purchase ($745.7K) and 18 sales ($13.8M) — net selling of $13.1M. Since January 2018, Trabud has recorded 296 Form 4 filings for ADP: 1 buys ($745.7K) and 295 sells ($721.8M). Over the full record that is net selling of $721.0M.
How many insiders trade ADP stock?
29 distinct insider filers — officers, directors, 10%+ owners, and investment groups filing jointly — have reported Form 4 transactions for AUTOMATIC DATA PROCESSING INC. The most recent filing was accepted on Sep 4, 2026.
Where does Trabud get ADP insider trading data?
All ADP insider trading data comes directly from official SEC EDGAR Form 4 filings, which corporate insiders must submit within two business days of a transaction under Section 16(a) of the Securities Exchange Act of 1934.