Automatic Data Processing, Inc.
US ˙ NasdaqGS ˙ US0530151036

SecurityADP / Automatic Data Processing, Inc.
InstitutionHamel Associates, Inc.
Latest Disclosed Ownership11,795 shares
Latest Disclosed Value $ 2,396,508
Hamel Associates, Inc. reports 20.79% increase in ownership of ADP / Automatic Data Processing, Inc.

On May 7, 2026 - Hamel Associates, Inc. filed a 13F-HR form disclosing ownership of 11,795 shares of Automatic Data Processing, Inc. (US:ADP) valued at $2,396,508 USD as of March 31, 2026. The entity filed a previous 13F-HR on February 11, 2026 disclosing 9,765 shares of Automatic Data Processing, Inc.. This represents a change in shares of 20.79% during the quarter. The current value of the position is $2,728,301 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)
2026-05-07 2026-03-31 13F AUTOMATIC DATA PROCESSING IN COM 053015103 11,795 2,030 20.79 2,397 -4.58 0.6837
2026-02-11 2025-12-31 13F AUTOMATIC DATA PROCESSING IN COM 053015103 9,765 0 0.00 2,512 -12.39 0.7571
2026-02-11 2025-12-31 13F AUTOMATIC DATA PROCESSING IN COM 053015103 9,765 2,512
2026-02-11 2025-12-31 13F AUTOMATIC DATA PROCESSING IN COM 053015103 9,765 2,512
2026-02-11 2025-12-31 13F AUTOMATIC DATA PROCESSING IN COM 053015103 9,765 2,512
2026-02-11 2025-12-31 13F AUTOMATIC DATA PROCESSING IN COM 053015103 9,765 2,512
2026-02-11 2025-12-31 13F AUTOMATIC DATA PROCESSING IN COM 053015103 9,765 2,512
2025-11-12 2025-09-30 13F AUTOMATIC DATA PROCESSING IN COM 053015103 9,765 0 0.00 2,866 -4.82 0.8813
2025-08-13 2025-06-30 13F AUTOMATIC DATA PROCESSING IN COM 053015103 9,765 -50 -0.51 3,012 0.43 1.0199
2025-05-06 2025-03-31 13F AUTOMATIC DATA PROCESSING IN COM 053015103 9,815 -35 -0.36 2,999 3.99 1.0192
2025-02-05 2024-12-31 13F AUTOMATIC DATA PROCESSING IN COM 053015103 9,850 0 0.00 2,883 5.80 0.9280
2024-11-05 2024-09-30 13F AUTOMATIC DATA PROCESSING IN COM 053015103 9,850 -90 -0.91 2,726 14.88 0.8329
2024-08-02 2024-06-30 13F AUTOMATIC DATA PROCESSING IN COM 053015103 9,940 0 0.00 2,373 -4.43 0.7476
2024-04-23 2024-03-31 13F AUTOMATIC DATA PROCESSING IN COM 053015103 9,940 0 0.00 2,482 7.21 0.7961
2024-02-08 2023-12-31 13F AUTOMATIC DATA PROCESSING IN COM 053015103 9,940 -90 -0.90 2,316 -4.06 0.8160
2023-11-03 2023-09-30 13F AUTOMATIC DATA PROCESSING IN COM 053015103 10,030 0 0.00 2,413 9.48 0.8813
2023-08-08 2023-06-30 13F AUTOMATIC DATA PROCESSING IN COM 053015103 10,030 -650 -6.09 2,204 -7.28 0.7714
2023-05-08 2023-03-31 13F AUTOMATIC DATA PROCESSING IN COM 053015103 10,680 -310 -2.82 2,378 -9.45 0.8237
2023-02-06 2022-12-31 13F AUTOMATIC DATA PROCESSING IN COM 053015103 10,990 0 0.00 2,625 5.59 0.9133
2022-11-09 2022-09-30 13F AUTOMATIC DATA PROCESSING IN COM 053015103 10,990 -150 -1.35 2,486 6.24 0.9837
2022-08-08 2022-06-30 13F AUTOMATIC DATA PROCESSING IN COM 053015103 11,140 -250 -2.19 2,340 -9.72 0.9227
2022-05-06 2022-03-31 13F AUTOMATIC DATA PROCESSING IN COM 053015103 11,390 -55 -0.48 2,592 -8.15 0.9216
2022-02-08 2021-12-31 13F AUTOMATIC DATA PROCESSING IN COM 053015103 11,445 -2,350 -17.04 2,822 2.32 1.0121
2021-11-08 2021-09-30 13F AUTOMATIC DATA PROCESSING IN COM 053015103 13,795 -650 -4.50 2,758 -3.87 1.0763
2021-08-04 2021-06-30 13F AUTOMATIC DATA PROCESSING IN COM 053015103 14,445 -441 -2.96 2,869 2.25 1.0940
2021-05-04 2021-03-31 13F AUTOMATIC DATA PROCESSING IN COM 053015103 14,886 0 0.00 2,806 6.98 1.0820
2021-02-11 2020-12-31 13F AUTOMATIC DATA PROCESSING IN COM 053015103 14,886 0 0.00 2,623 26.35 1.0745
2020-11-09 2020-09-30 13F AUTOMATIC DATA PROCESSING IN COM 053015103 14,886 11,460 334.50 2,076 307.06 0.9204
2020-08-10 2020-06-30 13F AUTOMATIC DATA PROCESSING IN COM 053015103 3,426 0 0.00 510 8.97 0.2455
2020-05-07 2020-03-31 13F AUTOMATIC DATA PROCESSING IN COM 053015103 3,426 -1,125 -24.72 468 -39.69 0.2470
2020-02-12 2019-12-31 13F AUTOMATIC DATA PROCESSING IN COM 053015103 4,551 0 0.00 776 5.58 0.3194
2019-11-12 2019-09-30 13F AUTOMATIC DATA PROCESSING IN COM 053015103 4,551 0 0.00 735 -2.26 0.3139
2019-08-05 2019-06-30 13F AUTOMATIC DATA PROCESSING IN COM 053015103 4,551 0 0.00 752 3.44 0.3298
2019-05-01 2019-03-31 13F AUTOMATIC DATA PROCESSING IN COM 053015103 4,551 0 0.00 727 21.78 0.3263
2019-02-08 2018-12-31 13F AUTOMATIC DATA PROCESSING IN COM 053015103 4,551 0 0.00 597 -12.85 0.2975
2018-10-25 2018-09-30 13F AUTOMATIC DATA PROCESSING IN COM 053015103 4,551 -85 -1.83 685 10.13 0.2968
2018-08-10 2018-06-30 13F AUTOMATIC DATA PROCESSING IN COM 053015103 4,636 0 0.00 622 18.25 0.2858
2018-05-03 2018-03-31 13F AUTOMATIC DATA PROCESSING IN COM 053015103 4,636 0 0.00 526 -3.13 0.0353
2018-02-13 2017-12-31 13F AUTOMATIC DATA PROCESSING IN COM 053015103 4,636 0 0.00 543 7.10 0.2565
2017-11-14 2017-09-30 13F AUTOMATIC DATA PROCESSING IN COM 053015103 4,636 -2,050 -30.66 507 -25.99 0.2468
2017-08-11 2017-06-30 13F AUTOMATIC DATA PROCESSING IN COM 053015103 6,686 441 7.06 685 7.03 0.3445
2017-05-09 2017-03-31 13F AUTOMATIC DATA PROCESSING IN COM 053015103 6,245 0 0.00 640 -0.31 0.3256
2017-02-14 2016-12-31 13F AUTOMATIC DATA PROCESSING IN COM 053015103 6,245 0 0.00 642 16.52 0.3306
2016-11-10 2016-09-30 13F AUTOMATIC DATA PROCESSING IN COM 053015103 6,245 0 0.00 551 -3.84 0.2914
2016-08-08 2016-06-30 13F AUTOMATIC DATA PROCESSING IN COM 053015103 6,245 0 0.00 573 2.32 0.2968
2016-05-02 2016-03-31 13F AUTOMATIC DATA PROCESSING IN COM 053015103 6,245 0 0.00 560 5.86 0.2971
2016-02-16 2015-12-31 13F AUTOMATIC DATA PROCESSING IN COM 053015103 6,245 2,450 64.56 529 73.44 0.3375
2015-11-17 2015-09-30 13F AUTOMATIC DATA PROCESSING IN COM 053015103 3,795 -725 -16.04 305 -15.75 0.2169
2015-08-17 2015-06-30 13F AUTOMATIC DATA PROCESSING IN COM 053015103 4,520 -1,100 -19.57 362 -24.74 0.2380
2015-05-14 2015-03-31 13F AUTOMATIC DATA PROCESSING IN COM 053015103 5,620 -21,118 -78.98 481 -78.42 0.3175
2015-02-17 2014-12-31 13F AUTOMATIC DATA PROCESSING IN COM 053015103 26,738 -390 -1.44 2,229 -1.11 1.4480
2014-11-21 2014-09-30 13F/A-1 AUTOMATIC DATA PROCESSING IN COM 053015103 27,128 -1,725 -5.98 2,254 -1.44 1.5026
2014-11-12 2014-09-30 13F AUTOMATIC DATA PROCESSING IN COM 053015103 27,128 2,254
2014-08-15 2014-06-30 13F AUTOMATIC DATA PROCESSING IN COM 053015103 28,853 -1,155 -3.85 2,287 -1.34 1.5093
2014-05-13 2014-03-31 13F AUTOMATIC DATA PROCESSING IN COM 053015103 30,008 -3,538 -10.55 2,318 -14.50 1.6049
2014-02-18 2013-12-31 13F AUTOMATIC DATA PROCESSING IN COM 053015103 33,546 33,546 2,711 1.9011
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.