Automatic Data Processing (ADP) insider buying and selling
Every Table I transaction reported by directors and officers of S&P 500 companies on SEC Form 4 filings (2 business days to file): each row labeled with its official transaction code, nothing filtered out beforehand.
Open-market purchases (code P) are the rare signal, in green; sales (code S) are common and often pre-scheduled (10b5-1). Table II (derivatives) is not included: its prices are exercise prices, not market values. Guide: insider buying.
| Date | Ticker | Insider | Role | Shares | Price | Amount | % of stake | Type / filing |
|---|
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Automatic Data Processing, Inc. (ADP) insider buying and selling: 1 purchase, 34 sales
138 Form 4 Table I transactions filed with the SEC by Automatic Data Processing, Inc. insiders between 2025-08-28 and 2026-09-10 (15-month history): 1 open-market purchase and 34 sales, plus 103 transactions under other Form 4 codes, broken down one by one below. The largest open-market trade is a sale of $8.4M by Black Maria on 2026-09-02.
Automatic Data Processing insider buying and selling over the last 12 months
Between Oct 21, 2025 and Oct 20, 2026, Automatic Data Processing insiders filed 1 purchase worth $746k and 18 sales worth $13.8M on the open market. The net balance is on the sell side: $13.1M more sold than bought.
The biggest buyer was Swan Robert Holmes (Director): $746k in 1 purchase, the only buyer. The biggest seller was Black Maria (President & CEO): $8.6M in 2 sales, out of 6 different sellers.
The largest trade of the period was a sale of $8.4M on Sep 2, 2026, by Black Maria (President & CEO), under a 10b5-1 plan. Form 4 on sec.gov (0001225208-26-007601).
All 18 sales carry the 10b5-1 plan flag on the Form 4: scheduled months ahead. The only purchase was also scheduled under a 10b5-1 plan.
The last three months show 0 purchases and 8 sales, against 1 and 1 in the three before. The latest purchase is from May 7, 2026; the latest sale from Sep 3, 2026.
Against its sector (Technology, 85 companies with an insider page on this site), over the same dates the median is 22 sales and 0 purchases on the open market. Automatic Data Processing has more sales than 35 of the other 84, ranks 59 of 85 by net dollars sold, and 32 of the 85 have at least one purchase, Automatic Data Processing included.
The 20 most important trades
The only open-market purchase first, then the rest, each type from largest to smallest. The full history is in the tool above, already searched.
See all 138 ADP trades in the full history →
| Trade date | Filed | Insider | Role | Amount | Code | Filing |
|---|---|---|---|---|---|---|
| 2026-05-07 | 2026-05-11 | Swan Robert Holmes | Director | $746k | P — Open-market purchase (scheduled 10b5-1)Form 4 footnoteF1 The transactions reported in this Form 4 were effected pursuant to a Rule 10b5-1 trading plan adopted by the reporting person in January 2026. | SEC |
| 2026-09-02 | 2026-09-03 | Black Maria | President & CEO | $8.4M | S — Open-market sale (scheduled 10b5-1)Form 4 footnoteF2 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. | SEC |
| 2025-09-03 | 2025-09-05 | Black Maria | President & CEO | $7.0M | S — Open-market sale (scheduled 10b5-1)Form 4 footnoteF1 The transactions reported in this Form 4 were effected pursuant to a Rule 10b5-1 trading plan adopted by the reporting person in September 2024. | SEC |
| 2025-09-09 | 2025-09-11 | Rodriguez Carlos A | Director | $6.5M | S — Open-market sale (scheduled 10b5-1)Form 4 footnoteF1 The transactions reported in this Form 4 were effected pursuant to a Rule 10b5-1 trading plan adopted by the reporting person in September 2024. | SEC |
| 2025-09-10 | 2025-09-11 | Rodriguez Carlos A | Director | $6.4M | S — Open-market sale (scheduled 10b5-1)Form 4 footnoteF1 The transactions reported in this Form 4 were effected pursuant to a Rule 10b5-1 trading plan adopted by the reporting person in September 2024. | SEC |
| 2025-09-03 | 2025-09-05 | Mcguire Don | Corp VP | $4.0M | S — Open-market sale (scheduled 10b5-1)Form 4 footnoteF1 The transactions reported in this Form 4 were effected pursuant to a Rule 10b5-1 trading plan adopted by the reporting person in September 2024. | SEC |
| 2025-09-05 | 2025-09-08 | Rodriguez Carlos A | Director | $3.6M | S — Open-market sale (scheduled 10b5-1)Form 4 footnoteF1 The transactions reported in this Form 4 were effected pursuant to a Rule 10b5-1 trading plan adopted by the reporting person in September 2024. | SEC |
| 2025-09-04 | 2025-09-05 | Rodriguez Carlos A | Director | $3.5M | S — Open-market sale (scheduled 10b5-1)Form 4 footnoteF1 The transactions reported in this Form 4 were effected pursuant to a Rule 10b5-1 trading plan adopted by the reporting person in September 2024. | SEC |
| 2025-09-03 | 2025-09-05 | Rodriguez Carlos A | Director | $3.5M | S — Open-market sale (scheduled 10b5-1)Form 4 footnoteF1 The transactions reported in this Form 4 were effected pursuant to a Rule 10b5-1 trading plan adopted by the reporting person in September 2024. | SEC |
| 2025-09-09 | 2025-09-11 | Bonarti Michael A | Corporate Vice President | $2.6M | S — Open-market sale (scheduled 10b5-1)Form 4 footnoteF1 The transactions reported in this Form 4 were effected pursuant to a Rule 10b5-1 trading plan adopted by the reporting person in September 2024. | SEC |
| 2025-09-02 | 2025-09-03 | Black Maria | President & CEO | $2.3M | S — Open-market sale (scheduled 10b5-1)Form 4 footnoteF2 The transactions reported in this Form 4 were effected pursuant to a Rule 10b5-1 trading plan adopted by the reporting person in September 2024. | SEC |
| 2026-09-02 | 2026-09-03 | Desilva Joseph | Executive VP | $1.8M | S — Open-market sale (scheduled 10b5-1)Form 4 footnoteF2 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. | SEC |
| 2025-09-03 | 2025-09-05 | Desilva Joseph | Executive VP | $1.4M | S — Open-market sale (scheduled 10b5-1)Form 4 footnoteF1 The transactions reported in this Form 4 were effected pursuant to a Rule 10b5-1 trading plan adopted by the reporting person in September 2024. | SEC |
| 2025-09-11 | 2025-09-15 | Rodriguez Carlos A | Director | $832k | S — Open-market sale (scheduled 10b5-1)Form 4 footnoteF1 The transactions reported in this Form 4 were effected pursuant to a Rule 10b5-1 trading plan adopted by the reporting person in September 2024. | SEC |
| 2026-07-30 | 2026-07-31 | Kwon David | Corp VP | $641k | S — Open-market sale (scheduled 10b5-1)Form 4 footnoteF1 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. | SEC |
| 2025-09-02 | 2025-09-03 | Desilva Joseph | Executive VP | $599k | S — Open-market sale (scheduled 10b5-1)Form 4 footnoteF2 The transactions reported in this Form 4 were effected pursuant to a Rule 10b5-1 trading plan adopted by the reporting person in September 2024. | SEC |
| 2026-09-02 | 2026-09-03 | D'Ambrosio Christopher | Corp. VP | $530k | S — Open-market sale (scheduled 10b5-1)Form 4 footnoteF2 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. | SEC |
| 2026-09-02 | 2026-09-03 | Foskett David | Corp. VP | $433k | S — Open-market sale (scheduled 10b5-1)Form 4 footnoteF2 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. | SEC |
| 2025-09-03 | 2025-09-05 | Foskett David | Corp. VP | $407k | S — Open-market sale (scheduled 10b5-1)Form 4 footnoteF1 The transactions reported in this Form 4 were effected pursuant to a Rule 10b5-1 trading plan adopted by the reporting person in September 2024. | SEC |
| 2025-09-12 | 2025-09-15 | Rodriguez Carlos A | Director | $374k | S — Open-market sale (scheduled 10b5-1)Form 4 footnoteF1 The transactions reported in this Form 4 were effected pursuant to a Rule 10b5-1 trading plan adopted by the reporting person in September 2024. | SEC |
The period balance: money in, money out
Across the Form 4 filings submitted between Aug 28, 2025 and Sep 10, 2026, Automatic Data Processing, Inc. open-market activity adds up to 1 purchase worth $746k and 34 sales worth $57.4M. The net balance is $56.7M on the sell side.
Only codes P and S count, where an insider puts in or takes out their own money. A selling balance like Automatic Data Processing, Inc.'s is the norm in the S&P 500, where much of the pay comes as stock. It is not a recommendation to buy or sell: it is what was filed.
Every transaction, code by code
| Code | What it means | Trades | Reported amount |
|---|---|---|---|
| A | Grant or award | 50 | $0 |
| F | Tax withholding (shares surrendered for taxes) | 36 | $55.7M |
| S | Open-market sale | 34 | $57.4M |
| M | Option exercise | 9 | $11.8M |
| I | Discretionary transaction in a plan | 6 | $59k |
| G | Gift | 2 | $0 |
| P | Open-market purchase | 1 | $746k |
| Total | Everything filed in the period | 138 | $125.8M |
52 of the 138 rows carry no usable amount on the Form 4: they count as trades and add $0. The code labels come from the SEC index.
Who has traded
Over the 15 months of history, 26 distinct people or entities have filed Automatic Data Processing, Inc. transactions: 1 bought on the open market and 9 sold. Counted by CIK, the fixed number the SEC gives each filer, and not by name, which each filer types their own way.
Of the 9 who sold on the open market (34 sales in all), the three biggest sellers account for $46.7M of the $57.4M: 81% of the money in three people.
| Filer | Role | Transactions | Bought (count) | Sold (count) | Last filed |
|---|---|---|---|---|---|
| Rodriguez Carlos A | Director | 13 | — | $24.7M (7) | 2026-09-03 |
| Black Maria | President & CEO | 13 | — | $17.9M (4) | 2026-09-03 |
| Mcguire Don | Corp VP | 2 | — | $4.0M (1) | 2025-09-05 |
| Desilva Joseph | Executive VP | 11 | — | $4.0M (4) | 2026-09-04 |
| Bonarti Michael A | Corporate Vice President | 7 | — | $2.6M (1) | 2026-09-03 |
| Kwon David | Corp VP | 15 | — | $1.3M (4) | 2026-09-03 |
| Foskett David | Corp. VP | 13 | — | $1.2M (4) | 2026-09-03 |
| D'Ambrosio Christopher | Corp. VP | 11 | — | $1.2M (6) | 2026-09-03 |
Shown here are the 8 who moved the most money, out of 26. The rest are in the full history, one link above. The name links to all their trades, in any company. "Transactions" counts any code; the money, open market only. Role: from their latest filing.
Month by month
By the month the trade was executed, not the month it was filed; months with no trades show zero. The busiest month was Sep 2025: 0 purchases and 16 sales, worth $43.6M. 6 of the 15 months have none.
| Month | Purchases | Amount | Sales | Amount |
|---|---|---|---|---|
| Aug 2025 | 0 | $0 | 0 | $0 |
| Sep 2025 | 0 | $0 | 16 | $43.6M |
| Oct 2025 | 0 | $0 | 0 | $0 |
| Nov 2025 | 0 | $0 | 0 | $0 |
| Dec 2025 | 0 | $0 | 0 | $0 |
| Jan 2026 | 0 | $0 | 4 | $774k |
| Feb 2026 | 0 | $0 | 3 | $413k |
| Mar 2026 | 0 | $0 | 1 | $113k |
| Apr 2026 | 0 | $0 | 1 | $106k |
| May 2026 | 1 | $746k | 1 | $180k |
| Jun 2026 | 0 | $0 | 0 | $0 |
| Jul 2026 | 0 | $0 | 1 | $641k |
| Aug 2026 | 0 | $0 | 2 | $257k |
| Sep 2026 | 0 | $0 | 5 | $11.4M |
| Oct 2026 | 0 | $0 | 0 | $0 |
The last month may be partial: a Form 4 is filed up to two business days later. The table does not say whether the pattern is good or bad; it says when it happened.
Automatic Data Processing, Inc. (ADP) analysis page →
Other Technology companies with insider trades
All 500 are listed in the section index →
Which insiders are buying their own company stock →
How to read this data
19 of the 19 sales in the table are flagged as scheduled (10b5-1 plan): signed months ahead and executed automatically, so they say nothing about what the insider thinks today. Automatic Data Processing's single open-market purchase (code P) is the rare signal: insiders are already paid in stock, so buying more means putting in their own money. The latest filing is from Sep 10, 2026, and a Form 4 arrives up to two business days after the trade.
20 of the 20 rows in the table carry footnotes from the Form 4 itself, folded into the code column and copied verbatim; a row with no footnote means the filing has none.
Guide: Insider buying · all guides
What is behind these trades
The concepts on this page, explained from scratch in the Academy. Free, no account.
- What the efficiency hypothesis says and what it does NOT sayIf an insider's purchase is public and anyone can read it, is there any information left in it? That is the exact question that brings people here.
- Who really moves the market: the types of investorWho sits on the other side of each order, and where a company's own insiders fit among them.
- Supply, demand and price: why it rises and falls constantlyHow a piece of news ends up inside the price, and why the reaction to a filed sale is rarely the one you would expect.
Source: SEC EDGAR Form 4. This is a list of public facts, not financial advice or a recommendation to buy or sell.