SEC Form 4
Automatic Data Processing (ADP) insider trading
In the 12 months to Oct 24, 2026, 6 ADP insiders reported open-market sales of $13.8M across 18 filings; one director bought $745.7K.
Latest filing · Last 12 months · Source: SEC EDGAR · How we count
- Open-market sales
- $13.8M
- 18 filings · 6 insiders
- Open-market purchases
- $745.7K
- 1 filing · Robert Holmes Swan, Director
- Pre-arranged sales (10b5-1)
- 18 of 18
- All $13.8M sold was pre-arranged
Who traded ADP, and when
- Purchase
- Sale
- Sale, pre-arranged (10b5-1)
ADP daily close from Oct 24, 2025 to Oct 23, 2026, between $188.79 and $307.94, last $304.16. 18 sale and 1 purchase filings by 7 insiders, marked at their filing dates. Maria Black, President & CEO: sold $8.6M across 2 filings, first filed Jan 6, 2026, last Sep 3, 2026. Joseph DeSilva, Executive VP: sold $2.0M across 2 filings, first filed Sep 3, 2026, last Sep 4, 2026. David Kwon, Corp VP: sold $1.3M across 4 filings, first filed Jan 8, 2026, last Aug 24, 2026. Christopher D'Ambrosio, Corp. VP: sold $1.0M across 5 filings, first filed Jan 14, 2026, last Sep 3, 2026. Robert Holmes Swan, Director: bought $745.7K across 1 filing, first filed May 11, 2026, last May 11, 2026. David Foskett, Corp. VP: sold $495.7K across 2 filings, first filed Feb 9, 2026, last Sep 3, 2026. Brian L. Michaud, Executive VP: sold $447.6K across 3 filings, first filed Feb 9, 2026, last Aug 24, 2026.
Largest mark · tap a row for others
Maria Black · President & CEO
Sale $8,373,873
29,810 shares at $280.91 avg
Filed Sep 3, 2026 · traded Sep 2
Pre-arranged (10b5-1) · close on filing date $283.53
Maria Black · President & CEO
President & CEO
$8.6M soldJoseph DeSilva · Executive VP
Executive VP
$2.0M soldDavid Kwon · Corp VP
Corp VP
$1.3M soldChristopher D'Ambrosio · Corp. VP
Corp. VP
$1.0M soldRobert Holmes Swan · Director
Director
$745.7K boughtDavid Foskett · Corp. VP
Corp. VP
$495.7K soldBrian L. Michaud · Executive VP
Executive VP
$447.6K soldHas Automatic Data Processing's CEO sold stock?
Yes. Maria Black (CEO) sold 30,525 shares ($8.6M) between Jan 2026 and Sep 2026, all under a pre-arranged 10b5-1 plan.
Open-market trades
19 filings in the last 12 months| Insider | Role | Sold | Bought | Filings | Pre-arranged (10b5-1) | Last filed |
|---|---|---|---|---|---|---|
| Maria Black | President & CEO | $8.6M | — | 2 | 100% of sales | |
| Joseph DeSilva | Executive VP | $2.0M | — | 2 | 100% of sales | |
| David Kwon | Corp VP | $1.3M | — | 4 | 100% of sales | |
| Christopher D'Ambrosio | Corp. VP | $1.0M | — | 5 | 100% of sales | |
| Robert Holmes Swan | Director | — | $745.7K | 1 | — | |
| David Foskett | Corp. VP | $495.7K | — | 2 | 100% of sales | |
| Brian L. Michaud | Executive VP | $447.6K | — | 3 | 100% of sales |
| Filed | Insider | Type | Shares | Avg price | Value | Held after | Source |
|---|---|---|---|---|---|---|---|
traded | Joseph DeSilva Executive VP | SalePre-arranged (10b5-1) | 631 | $282.87 | $178.5K | 18,824 | |
traded | Maria Black President & CEO | SalePre-arranged (10b5-1) | 29,810 | $280.91 | $8.4M | 110,220 | |
traded | Christopher D'Ambrosio Corp. VP | SalePre-arranged (10b5-1) | 1,872 | $283.00 | $529.8K | 9,928 | |
traded | Joseph DeSilva Executive VP | SalePre-arranged (10b5-1) | 6,512 | $283.00 | $1.8M | 19,455 | |
traded | David Foskett Corp. VP | SalePre-arranged (10b5-1) | 1,529 | $283.00 | $432.7K | 14,146 | |
traded | David Kwon Corp VP | SalePre-arranged (10b5-1) | 798 | $280.00 | $223.4K | 13,193 | |
traded | Brian L. Michaud Executive VP | SalePre-arranged (10b5-1) | 120 | $279.70 | $33.6K | 18,442 | |
traded | David Kwon Corp VP | SalePre-arranged (10b5-1) | 2,414 | $265.62 | $641.2K | 9,660 | |
traded | Brian L. Michaud Executive VP | SalePre-arranged (10b5-1) | 848 | $212.13 | $179.9K | 14,462 | |
traded | Robert Holmes Swan Director | PurchasePre-arranged (10b5-1) | 3,619 | $206.05 | $745.7K | 5,072 | |
traded | Christopher D'Ambrosio Corp. VP | SalePre-arranged (10b5-1) | 543 | $195.74 | $106.3K | 8,369 | |
traded | Christopher D'Ambrosio Corp. VP | SalePre-arranged (10b5-1) | 543 | $208.45 | $113.2K | 8,912 | |
traded | Christopher D'Ambrosio Corp. VP | SalePre-arranged (10b5-1) | 543 | $212.43 | $115.3K | 9,455 | |
traded | David Foskett Corp. VP | SalePre-arranged (10b5-1) | 266 | $237.00 | $63.0K | 10,954 | |
traded | Brian L. Michaud Executive VP | SalePre-arranged (10b5-1) | 1,000 | $234.18 | $234.2K | 15,310 | |
traded | David Kwon Corp VP | SalePre-arranged (10b5-1) | 806 | $264.80 | $213.4K | 11,187 | |
traded | Christopher D'Ambrosio Corp. VP | SalePre-arranged (10b5-1) | 543 | $262.29 | $142.4K | 9,998 | |
traded | David Kwon Corp VP | SalePre-arranged (10b5-1) | 900 | $260.00 | $234.0K | 11,993 | |
traded | Maria Black President & CEO | SalePre-arranged (10b5-1) | 715 | $257.17 | $183.9K | 75,660 |
GET /stocks/filings/vX/form-4?tickers=ADP&filing_date.gte=2025-10-24&sort=filing_date.desc&limit=500{
"status": "OK",
"results": [
{
"tickers": [
"ADP"
],
"issuer_cik": "0000008670",
"owner_cik": "0001805266",
"accession_number": "0001225208-26-007685",
"form_type": "4",
"filing_date": "2026-09-04",
"period_of_report": "2026-09-03",
"issuer_name": "AUTOMATIC DATA PROCESSING INC",
"issuer_trading_symbol": "ADP",
"owner_name": "DeSilva Joseph",
"is_officer": true,
"officer_title": "Executive VP",
"security_type": "non_derivative",
"record_type": "transaction",
"security_title": "Common Stock",
"transaction_timeliness": "O",
"aff_10b5_one": true,
"transaction_date": "2026-09-03",
"transaction_code": "S",
"equity_swap_involved": false,
"transaction_shares": 631,
"transaction_price_per_share": 282.87,
"transaction_acquired_disposed": "D",
"shares_owned_following_transaction": 18824.188,
"transaction_value": 178490.97,
"direct_or_indirect": "D",
"footnotes": [
{
"id": "F1",
"description": "The transactions reported in this Form 4 were effected pursuant to a Rule 10b5-1 trading plan adopted by the reporting person in September 2025."
}
]
},
{
"tickers": [
"ADP"
],
"issuer_cik": "0000008670",
"owner_cik": "0001608466",
"accession_number": "0001225208-26-007601",
"form_type": "4",
"filing_date": "2026-09-03",
"period_of_report": "2026-09-01",
"issuer_name": "AUTOMATIC DATA PROCESSING INC",
"issuer_trading_symbol": "ADP",
"owner_name": "Black Maria",
"is_officer": true,
"officer_title": "President & CEO",
"security_type": "non_derivative",
"record_type": "transaction",
"security_title": "Common Stock",
"transaction_timeliness": "O",
"aff_10b5_one": true,
"transaction_date": "2026-09-02",
"transaction_code": "S",
"equity_swap_involved": false,
"transaction_shares": 1483,
"transaction_price_per_share": 281.1319,
"transaction_acquired_disposed": "D",
"shares_owned_following_transaction": 101837.172,
"transaction_value": 416918.60769999993,
"direct_or_indirect": "D",
"footnotes": [
{
"id": "F2",
"description": "The transactions reported in this Form 4 were effected pursuant to a Rule 10b5-1 trading plan adopted by the reporting person in September 2025."
}
]
}
]
}
// trimmed to 2 resultsThe response includes every Form 4 record; this page keeps open-market purchases and sales on common stock and removes duplicate joint-filer rows.
Other insider activity (not market trades) · 72 records
- Option exercises4 records
- Tax withholding22 records
- Grants and awards39 records
- Gifts1 record
- Other6 records
Reported on Form 4 but not purchases or sales in the market, so not counted in the totals above.
Build this yourself
This page joins two Massive endpoints: Form 4 filings and daily prices. Ask an agent to watch for new filings:
Using the Massive API (massive.com/docs/llms.txt), check Form 4 filings for ADP every day with transaction_code=P and tell me when an insider files an open-market purchase, with their role, shares, price and the filing link.
How to read this page
- Open-market purchase or sale
- A buy or sell of the company's stock at market price. Grants, option exercises, shares withheld for tax, gifts and employee stock plan purchases are listed separately and not counted.
- Pre-arranged (10b5-1)
- The insider marked the filing as made under a trading plan set up in advance (SEC Rule 10b5-1). The mark covers the whole filing, and an unmarked filing may still be under a plan.
- Filing date
- Insiders have two business days to report a trade. Totals and the chart use the filing date, when the trade became public.