Automatic Data Processing, Inc.
US ˙ NasdaqGS ˙ US0530151036

SecurityADP / Automatic Data Processing, Inc.
InstitutionWASHINGTON TRUST Co
Latest Disclosed Ownership73,454 shares
Latest Disclosed Value $ 14,924,384
WASHINGTON TRUST Co reports 2.09% increase in ownership of ADP / Automatic Data Processing, Inc.

On April 6, 2026 - WASHINGTON TRUST Co filed a 13F-HR form disclosing ownership of 73,454 shares of Automatic Data Processing, Inc. (US:ADP) valued at $14,924,384 USD as of March 31, 2026. The entity filed a previous 13F-HR on February 10, 2026 disclosing 71,950 shares of Automatic Data Processing, Inc.. This represents a change in shares of 2.09% during the quarter. The current value of the position is $16,990,645 USD.

Institutional Ownership: 13F and NPORT Filings

The Security and Class in the table below are shown exactly as filed by the investor. We do our best to track continuity of investments through acquisitions, and this will be reflected in the table as changes in names. In addition to descriptive data, performance of the investment is shown over time. To calculate quarterly performance, we first calculate cost basis of the shares purchased during the quarter, then use that to calculate gross profit. Quarterly return is Gross Profit / Starting Portfolio value.

Note that cost basis is calculated and stored in thousands, so small quarterly changes in shares frequently result in a cost basis of zero.

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Disclosed Equity Positions (from 13F/NPORT Filings)
File
Date		 Effective
Date		Form Security Class ID Avg Price
Paid (Est)		 Reported
Shares		 ΔShares ΔShares
(%)		 Reported
Value
(x1000)		 ΔValue
(%)		 Alloc
(%)		 ΔAlloc ΔAlloc (%) Cost Basis
(x1000)		 Unrealized
Gain/Loss
(x1000)
2026-04-06 2026-03-31 13F AUTOMATIC DATA PROCESSING Equities 053015103 73,454 1,504 2.09 14,924 -19.36 0.4854
2026-02-10 2025-12-31 13F AUTOMATIC DATA PROCESSING Equities 053015103 71,950 -891 -1.22 18,508 -13.43 0.6049
2025-11-12 2025-09-30 13F AUTOMATIC DATA PROCESSING Equities 053015103 72,841 -2,048 -2.73 21,379 -7.43 0.7014
2025-08-08 2025-06-30 13F AUTOMATIC DATA PROCESSING Equities 053015103 74,889 -164 -0.22 23,096 0.72 0.8165
2025-04-25 2025-03-31 13F AUTOMATIC DATA PROCESSING IN COM 053015103 75,053 -2,267 -2.93 22,931 1.31 0.8790
2025-01-30 2024-12-31 13F AUTOMATIC DATA PROCESSING COM 053015103 77,320 -749 -0.96 22,634 4.76 0.8119
2024-10-25 2024-09-30 13F AUTOMATIC DATA PROCESSING COM 053015103 78,069 -1,492 -1.88 21,604 13.77 0.7574
2024-07-15 2024-06-30 13F AUTOMATIC DATA PROCESSING COM 053015103 79,561 -1,370 -1.69 18,990 -6.04 0.6946
2024-04-23 2024-03-31 13F AUTOMATIC DATA PROCESSING COM 053015103 80,931 83 0.10 20,212 7.31 0.7425
2024-01-18 2023-12-31 13F AUTOMATIC DATA PROCESSING COM 053015103 80,848 235 0.29 18,835 -2.88 0.7454
2023-10-18 2023-09-30 13F AUTOMATIC DATA PROCESSING COM 053015103 80,613 -946 -1.16 19,394 8.19 0.8531
2023-07-27 2023-06-30 13F AUTOMATIC DATA PROCESSING COM 053015103 81,559 -525 -0.64 17,926 -1.91 0.7559
2023-05-10 2023-03-31 13F/A-1 AUTOMATIC DATA PROCESSING COM 053015103 82,084 -696 -0.84 18,274 -7.58 0.8233
2023-05-04 2023-03-31 13F AUTOMATIC DATA PROCESSING COM 053015103 82 -82,698 18 0.7705
2023-07-27 2022-12-31 13F/A-1 AUTOMATIC DATA PROCESSING COM 053015103 82,780 -3,405 -3.95 19,773 1.43 0.9212
2023-02-08 2022-12-31 13F AUTOMATIC DATA PROCESSING COM 053015103 82,780 -3,405 20 0.0009
2022-10-14 2022-09-30 13F AUTOMATIC DATA PROCESSING COM 053015103 86,185 -876 -1.01 19,494 6.61 0.9818
2022-07-25 2022-06-30 13F AUTOMATIC DATA PROCESSING COM 053015103 87,061 -761 -0.87 18,286 -8.49 0.8586
2022-05-05 2022-03-31 13F AUTOMATIC DATA PROCESSING COM 053015103 87,822 1,438 1.66 19,983 -6.19 0.7907
2022-02-09 2021-12-31 13F/A-1 AUTOMATIC DATA PROCESSING COM 053015103 86,384 -15,776 -15.44 21,301 4.30 0.7991
2022-02-09 2021-12-31 13F AUTOMATIC DATA PROCESSING COM 053015103 86,384 -15,776 21,301 0.7454
2021-11-09 2021-09-30 13F AUTOMATIC DATA PROCESSING COM 053015103 102,160 -17 -0.02 20,423 0.64 0.5758
2021-08-05 2021-06-30 13F AUTOMATIC DATA PROCESSING COM 053015103 102,177 -739 -0.72 20,294 4.63 0.5724
2021-04-28 2021-03-31 13F AUTOMATIC DATA PROCESSING COM 053015103 102,916 1,256 1.24 19,396 8.28 0.5954
2021-02-09 2020-12-31 13F AUTOMATIC DATA PROCESSING COM 053015103 101,660 -1,014 -0.99 17,912 25.06 0.5782
2020-11-05 2020-09-30 13F AUTOMATIC DATA PROCESSING COM 053015103 102,674 -1,795 -1.72 14,323 -6.58 0.5291
2020-08-04 2020-06-30 13F AUTOMATIC DATA PROCESSING COM 053015103 104,469 -45 -0.04 15,332 7.34 0.6367
2020-05-07 2020-03-31 13F AUTOMATIC DATA PROCESSING COM 053015103 104,514 -1,477 -1.39 14,284 -20.96 0.6810
2020-02-12 2019-12-31 13F AUTOMATIC DATA PROCESSING COM 053015103 105,991 17,653 19.98 18,072 26.10 0.7120
2019-11-06 2019-09-30 13F AUTOMATIC DATA PROCESSING COM 053015103 88,338 -964 -1.08 14,331 -2.93 0.7671
2019-08-07 2019-06-30 13F AUTOMATIC DATA PROCESSING COM 053015103 89,302 -228 -0.25 14,764 3.59 0.8085
2019-05-13 2019-03-31 13F AUTOMATIC DATA PROCESSING COM 053015103 89,530 -2,902 -3.14 14,253 17.61 0.7973
2019-02-11 2018-12-31 13F Automatic Data Processing COM 053015103 92,432 -1,950 -2.07 12,119 -14.77 0.7708
2018-11-13 2018-09-30 13F Automatic Data Processing COM 053015103 94,382 -5,043 -5.07 14,219 6.61 0.7612
2018-08-10 2018-06-30 13F Automatic Data Processing COM 053015103 99,425 3,765 3.94 13,337 22.85 0.7146
2018-05-10 2018-03-31 13F AUTOMATIC DATA PROCESSING COMMON STOCK 053015103 95,660 -2,777 -2.82 10,856 -5.89 0.6362
2018-02-05 2017-12-31 13F AUTOMATIC DATA PROCESSING COMMON STOCK 053015103 98,437 -871 -0.88 11,535 6.24 0.6492
2017-10-31 2017-09-30 13F AUTOMATIC DATA PROCESSING COMMON STOCK 053015103 99,308 -637 -0.64 10,857 6.03 0.6457
2017-08-03 2017-06-30 13F AUTOMATIC DATA PROCESSING COMMON STOCK 053015103 99,945 437 0.44 10,240 0.51 0.6239
2017-05-01 2017-03-31 13F AUTOMATIC DATA PROCESSING COMMON STOCK 053015103 99,508 -603 -0.60 10,188 -0.99 0.6457
2017-02-08 2016-12-31 13F AUTOMATIC DATA PROCESSING COMMON STOCK 053015103 100,111 -1,534 -1.51 10,290 14.78 0.6660
2016-11-03 2016-09-30 13F AUTOMATIC DATA PROCESSING COMMON STOCK 053015103 101,645 -3,060 -2.92 8,965 -6.80 0.5898
2016-08-11 2016-06-30 13F AUTOMATIC DATA PROCESSING COMMON STOCK 053015103 104,705 -678 -0.64 9,619 1.75 0.6501
2016-05-05 2016-03-31 13F AUTOMATIC DATA PROCESSING COMMON STOCK 053015103 105,383 -421 -0.40 9,454 5.48 0.6308
2016-02-12 2015-12-31 13F AUTOMATIC DATA PROCESSING COMMON STOCK 053015103 105,804 -9,581 -8.30 8,963 -3.33 0.6124
2015-11-12 2015-09-30 13F AUTOMATIC DATA PROCESSING COMMON STOCK 053015103 115,385 -821 -0.71 9,272 -0.55 0.6694
2015-08-07 2015-06-30 13F AUTOMATIC DATA PROCESSING COMMON STOCK 053015103 116,206 -3,242 -2.71 9,323 -8.87 0.6144
2015-05-05 2015-03-31 13F AUTOMATIC DATA PROCESSING COMMON STOCK 053015103 119,448 959 0.81 10,230 3.55 0.6791
2015-02-11 2014-12-31 13F AUTOMATIC DATA PROCESSING COMMON STOCK 053015103 118,489 2,669 2.30 9,879 2.66 0.6789
2014-11-12 2014-09-30 13F AUTOMATIC DATA PROCESSING COMMON STOCK 053015103 115,820 -1,702 -1.45 9,623 3.28 0.7053
2014-08-12 2014-06-30 13F AUTOMATIC DATA PROCESSING COMMON STOCK 053015103 117,522 644 0.55 9,317 3.18 0.6828
2014-05-09 2014-03-31 13F AUTOMATIC DATA PROCESSING COMMON STOCK 053015103 116,878 -1,265 -1.07 9,030 -5.41 0.6792
2014-02-13 2013-12-31 13F AUTOMATIC DATA PROCESSING COMMON STOCK 053015103 118,143 -2,315 -1.92 9,546 9.49 0.7271
2013-11-08 2013-09-30 13F AUTOMATIC DATA PROCESSING COMMON STOCK 053015103 120,458 2,922 2.49 8,719 7.74 0.6987
2013-08-14 2013-06-30 13F AUTOMATIC DATA PROCESSING COMMON STOCK 053015103 117,536 117,536 8,093 0.6830
Legend
Shares
The total number of shares held by the institution at the end of the reporting period (the effective date). This is provided in the filing.
Value
The total value of the shares as of the effective date. This is provided in the filing.
Avg. Share Price
The weighted average share price of the shares held by the institution. We use FIFO accounting to determine this price
Class
This is the security class as indicated by the filer. There are a variety of values for this field. Common values include "EC" = equity common, "EP" - equity preferred
Allocation (%)
The percent of the institution's portfolio that this position represents. This is provided in NPORT filings. For 13F filings, we calculate it.
Change in Allocation
The change in allocation from the prior reporting period. This is calculated as current allocation - prior allocation.
Change in Allocation (%)
The percent change in allocation from the prior reporting period. This is calculated as (current allocation - prior allocation) / prior allocation.
Cost Basis
The total cost of the shares held. This is calculated as reported shares * avg. share price
Unrealized Gain/Loss
This is the market value of the position as of the effective date minus the cost basis.