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Automatic Data Processing

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Automatic Data Processing insider trading

Automatic Data Processing files with the SEC as a Services-Computer Processing & Data Preparation company headquartered in Roseland, NJ. Every time one of its executives or directors buys or sells the stock, the filing appears here the moment it reaches the SEC — with grants and option exercises set apart from the trades that cost the insider their own money.

From SEC filings

Recent ADP insider transactions

6 insiders traded ADP on the open market between Aug 20, 2026 and Sep 03, 2026 — 20 sales worth $11.6M, of which every one was pre-scheduled under a 10b5-1 plan.

Bought
—
Sold
$11.6M

20 of 20 on a 10b5-1 plan

Net
−$11.6M
Insiders
6

Open-market purchases (code P) and sales (code S) from Automatic Data Processing's own SEC Form 4 filings. Grants and option exercises are excluded — they are compensation, not decisions. Share counts are derived from the reported value and price. Verify any figure against the original filing before acting on it; this is monitoring, not advice.

Filing history last read from EDGAR on Sep 22, 2026. The live dashboard shows new filings the moment they clear.

Every ADP Form 4 on SEC.gov

SEC Form 4 data, Q3 2024 to Q2 2026

ADP insider trading by quarter

Between Jul 01, 2024 and Jun 30, 2026, 14 insiders traded ADP on the open market: 1 purchase worth $745.7K and 186 sales worth $172.1M, 184 of the sales pre-scheduled under a 10b5-1 plan. In the last four quarters alone: 1 purchase ($745.7K) and 87 sales ($45.3M), by 10 insiders.

QuarterBoughtSold
Q2 2026+$745.7K1 buy−$286.2K2 sales · all on a plan
Q1 2026—−$1.3M13 sales · all on a plan
Q4 2025——
Q3 2025—−$43.7M72 sales · all on a plan
Q2 2025—−$1.2M4 sales · all on a plan
Q1 2025—−$21.9M23 sales · all on a plan
Q4 2024—−$11.7M6 sales · all on a plan
Q3 2024—−$92M66 sales · 64 on a plan
Largest purchase
+$745.7K of ADP by Swan Robert Holmes (Director) on May 07, 2026, under a 10b5-1 plan.
Largest sale
−$9.1M of ADP by Bonarti Michael A (Corporate Vice President) on Feb 03, 2025, under a 10b5-1 plan.

Open-market transactions through Jun 30, 2026most recent first

  • Michaud Brian L.10b5-1

    Executive VP

    −$179.9K

    May 08, 2026

    848 sh · $212.13

  • Swan Robert Holmes10b5-1

    Director

    +$745.7K

    May 07, 2026

    3,619 sh · $206.05

  • D'Ambrosio Christopher10b5-1

    Corp. VP

    −$106.3K

    Apr 14, 2026

    543 sh · $195.74

  • D'Ambrosio Christopher10b5-1

    Corp. VP

    −$113.2K

    Mar 16, 2026

    543 sh · $208.45

  • D'Ambrosio Christopher10b5-1

    Corp. VP

    −$115.3K

    Feb 17, 2026

    543 sh · $212.43

  • Michaud Brian L.10b5-1

    Executive VP

    −$234.2K

    Feb 06, 2026

    1,000 sh · $234.18

  • Foskett David10b5-1

    Corp. VP

    −$63K

    Feb 05, 2026

    266 sh · $237.00

  • D'Ambrosio Christopher10b5-1

    Corp. VP

    −$142.4K

    Jan 13, 2026

    543 sh · $262.29

  • Kwon David10b5-1

    Corp VP

    −$213.4K

    Jan 12, 2026

    806 sh · $264.80

  • Kwon David10b5-1

    Corp VP

    −$234K

    Jan 06, 2026

    900 sh · $260.00

  • Black Maria10b5-1

    President & CEO

    −$75.9K

    Jan 05, 2026

    294 sh · $258.09

  • Black Maria10b5-1

    President & CEO

    −$37.3K

    Jan 05, 2026

    145 sh · $257.24

  • Black Maria10b5-1

    President & CEO

    −$25.4K

    Jan 05, 2026

    98 sh · $258.77

  • Black Maria10b5-1

    President & CEO

    −$18.1K

    Jan 05, 2026

    71 sh · $254.95

  • Black Maria10b5-1

    President & CEO

    −$14.3K

    Jan 05, 2026

    56 sh · $255.73

From SEC's quarterly Form 3, 4 and 5 data sets: code P purchases and code S sales of common stock, by the date the trade happened. Where a fund and the people who control it each report the same block, it is counted once. Trades made in the last days of Q2 2026 but filed after it closed arrive with SEC's next quarterly release.

Automatic Data Processing company record

SEC industry classification
Services-Computer Processing & Data Preparation
Headquarters
Roseland, NJ
Incorporated in
DE
Listed on
Nasdaq
SEC Central Index Key
0000008670

Sourced from this company's own SEC submissions record. The industry label is SEC's Standard Industrial Classification, which is more specific than the Industrials sector shown above.

After insiders bought ADP

What the stock actually did in the 90 days following each open-market purchase

Don't check ADP — let it ping you

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Pro watches Automatic Data Processing for you and sends a Telegram ping within moments of a Form 4 clearing EDGAR — a C-suite open-market buy, a cluster, a 10b5-1 regime break — long before it reaches the press. Add ADP to a watchlist, see each mover's benchmark-measured track record and which legendary funds hold it, and read the full filing history instead of the last 72 hours.

Track ADP on the live dashboardFilings on SEC.gov

The live dashboard is free to open. Alerts, watchlists, full filing history and each mover's benchmark-measured track record are Pro. Monitoring, not advice.

How to read ADP insider activity

Open-market purchase (code P)
An insider spending their own money at market price. This is the only buy code that reliably carries signal — it is a decision, not compensation.
Grants and option exercises (codes A, M)
Scheduled compensation. Most "insider buying" headlines are really this, which is why InsiderPulse weights it at a fraction of a real purchase.
Cluster buy
Two or more different insiders buying on the open market in the same window. One executive buying can mean anything; three is much harder to explain away.

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This week on the tape: who actually chose to sellThe weekly split of scheduled 10b5-1 selling vs deliberate sales, with the deciders named.

Questions

Are ADP insiders buying or selling?
Between Aug 20, 2026 and Sep 03, 2026, 6 Automatic Data Processing insiders made no open-market purchases and 20 sales worth $11.6M, a net sale of $11.6M. 20 of the sales were pre-scheduled under a Rule 10b5-1 plan.
How much ADP stock have insiders bought and sold in the last two years?
Between Jul 01, 2024 and Jun 30, 2026, 14 Automatic Data Processing insiders made 1 open-market purchase worth $745.7K and 186 sales worth $172.1M. 184 of the sales were pre-scheduled under a Rule 10b5-1 plan. In the four quarters to Jun 30, 2026: 1 purchase ($745.7K) and 87 sales ($45.3M). The largest purchase was Swan Robert Holmes buying $745.7K on May 07, 2026. The largest sale was Bonarti Michael A selling $9.1M on Feb 03, 2025.
What was the largest recent ADP insider trade?
Black Maria (President & CEO) sold $3M of ADP stock on Sep 02, 2026 at about $280.82 a share, under a pre-scheduled 10b5-1 plan.
When did an insider last buy ADP shares?
No open-market purchase by a Automatic Data Processing insider appears in the filings from Aug 20, 2026 to Sep 03, 2026 — every recorded open-market transaction in that period was a sale. Before that, the most recent purchase in SEC's data was Swan Robert Holmes buying $745.7K on May 07, 2026.
Where does ADP insider trading data come from?
From the Form 4 filings Automatic Data Processing's officers, directors and 10% owners must send the SEC within two business days of a trade. Each row on this page links to its original filing on SEC EDGAR. Share grants and option exercises are kept apart from open-market purchases and sales, because only the latter cost the insider their own money.

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