Automatic Data Processing, Inc. (ADP) has 20 known insider and institutional holders on record. The largest holder is Bonarti Michael A with 80,414 shares. Other notable holders include Black Maria and JONES JOHN P III.
Over the last 12 months, insiders have made 48 transactions in ADP stock — 14 buys (valued at $26.15K) and 18 sells (valued at $13.75M). Insider selling has exceeded buying during this period.
ADP Insider Ownership
Top Holder
Bonarti Michael A
80,414 shares
Buys (12 mo)
14
$26.15K value
Sells (12 mo)
18
$13.75M value
12-Month Transaction Activity
Top Insider Holders
| # |
Name |
Role |
Shares Owned |
Last Filed |
Relative Size |
| 1 |
Bonarti Michael A |
Corporate Vice President |
80,414 |
2025-12-15 |
|
| 2 |
Black Maria |
President & CEO |
75,052 |
2026-01-06 |
|
| 3 |
Jones John P Iii |
Director |
65,101 |
2024-11-07 |
|
| 4 |
Kutam Sreenivasa |
Corp VP |
40,686 |
2026-01-14 |
|
| 5 |
Eberhard Michael C |
Corporate Vice President |
32,399 |
2022-09-06 |
|
| 6 |
Clark Richard T |
Director |
32,278 |
2021-11-12 |
|
| 7 |
Winters Kathleen A |
Corp. VP |
30,881 |
2021-09-03 |
|
| 8 |
Bisson Peter |
Director |
22,769 |
2025-11-14 |
|
| 9 |
Rodriguez Carlos A |
Director |
22,728 |
2025-11-14 |
|
| 10 |
Wijnberg Sandra S |
Director |
20,505 |
2025-11-14 |
|
| 11 |
Ready William J |
Director |
19,821 |
2024-11-07 |
|
| 12 |
Mcguire Don |
Corp VP |
17,684 |
2025-09-05 |
|
| 13 |
Desilva Joseph |
Executive VP |
17,458 |
2026-01-05 |
|
| 14 |
Lynch Thomas J |
Director |
16,987 |
2025-11-14 |
|
| 15 |
Michaud Brian L. |
Executive VP |
15,310 |
2026-02-09 |
|
| 16 |
Powers Scott F |
Director |
14,572 |
2025-11-14 |
|
| 17 |
Katsoudas Francine S |
Director |
11,634 |
2025-11-14 |
|
| 18 |
Kwon David |
Corp VP |
11,187 |
2026-01-14 |
|
| 19 |
Foskett David |
Corp. VP |
10,954 |
2026-02-09 |
|
| 20 |
Keene Nazzic S |
Director |
9,717 |
2025-11-14 |
|
Recent Transactions (last 12 months)
| Date |
Name |
Role |
Type |
Shares |
Price |
Value |
| 2026-03-16 |
D'ambrosio Christopher |
Corp. VP |
Informative Sell |
543 |
$208.45 |
$113.19K |
| 2026-02-17 |
D'ambrosio Christopher |
Corp. VP |
Informative Sell |
543 |
$212.43 |
$115.35K |
| 2026-02-05 |
Foskett David |
Corp. VP |
Informative Sell |
266 |
$237.00 |
$63.04K |
| 2026-02-06 |
Michaud Brian L. |
Executive VP |
Informative Sell |
1,000 |
$234.18 |
$234.18K |
| 2026-01-30 |
Foskett David |
Corp. VP |
Tax Withholding of RSU |
586 |
$246.82 |
$144.64K |
| 2026-02-02 |
Michaud Brian L. |
Executive VP |
Tax Withholding of RSU |
132 |
$246.82 |
$32.58K |
| 2026-01-12 |
Kwon David |
Corp VP |
Informative Sell |
806 |
$264.80 |
$213.43K |
| 2026-01-13 |
D'ambrosio Christopher |
Corp. VP |
Informative Sell |
543 |
$262.29 |
$142.42K |
| 2026-01-12 |
Kutam Sreenivasa |
Corp VP |
Tax Withholding of RSU |
85 |
$266.02 |
$22.61K |
| 2026-01-06 |
Kwon David |
Corp VP |
Option Exercise (Sell) |
1,137 |
$138.53 |
$157.51K |
| 2026-01-05 |
Black Maria |
President & CEO |
Informative Sell |
294 |
$258.09 |
$75.88K |
| 2026-01-01 |
Foskett David |
Corp. VP |
Discretionary Buy |
25 |
$244.37 |
$6.11K |
| 2026-01-01 |
Michaud Brian L. |
Executive VP |
Discretionary Buy |
41 |
$244.37 |
$10.02K |
| 2026-01-02 |
Desilva Joseph |
Executive VP |
Gift (Given) |
78 |
- |
- |
| 2026-01-02 |
Black Maria |
President & CEO |
Tax Withholding of RSU |
435 |
$257.23 |
$111.9K |
| 2026-01-01 |
Black Maria |
President & CEO |
Discretionary Buy |
41 |
$244.37 |
$10.02K |
| 2025-12-12 |
Kwon David |
Corp VP |
Tax Withholding of RSU |
51 |
$266.10 |
$13.57K |
| 2025-12-12 |
Michaud Brian L. |
Executive VP |
Tax Withholding of RSU |
37 |
$266.10 |
$9.85K |
| 2025-12-12 |
Kutam Sreenivasa |
Corp VP |
Tax Withholding of RSU |
163 |
$266.10 |
$43.37K |
| 2025-12-12 |
Bonarti Michael A |
Corporate Vice President |
Tax Withholding of RSU |
117 |
$266.10 |
$31.13K |
| 2025-11-12 |
Haynesworth Linnie M |
Director |
RSU Award |
942 |
- |
- |
| 2025-11-12 |
Katsoudas Francine S |
Director |
RSU Award |
1,453 |
- |
- |
| 2025-11-12 |
Goeckeler David |
Director |
RSU Award |
1,453 |
- |
- |
| 2025-11-12 |
Bisson Peter |
Director |
RSU Award |
1,521 |
- |
- |
| 2025-11-12 |
Keene Nazzic S |
Director |
RSU Award |
942 |
- |
- |
