Automatic Data Processing, Inc.
US ˙ NasdaqGS ˙ US0530151036

SecurityADP / Automatic Data Processing, Inc.
InstitutionNorthstar Group, Inc.
Latest Disclosed Ownership14,483 shares
Latest Disclosed Value $ 2,942,638
Northstar Group, Inc. reports 6.16% decrease in ownership of ADP / Automatic Data Processing, Inc.

On April 28, 2026 - Northstar Group, Inc. filed a 13F-HR form disclosing ownership of 14,483 shares of Automatic Data Processing, Inc. (US:ADP) valued at $2,942,656 USD as of March 31, 2026. The entity filed a previous 13F-HR on February 13, 2026 disclosing 15,433 shares of Automatic Data Processing, Inc.. This represents a change in shares of -6.16% during the quarter. The current value of the position is $3,350,063 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)
2026-04-28 2026-03-31 13F AUTOMATIC DATA PROCESSING IN COM 053015103 14,483 -950 -6.16 2,943 -25.88 0.4160
2026-02-13 2025-12-31 13F AUTOMATIC DATA PROCESSING IN COM 053015103 15,433 221 1.45 3,970 -11.09 0.5407
2025-10-22 2025-09-30 13F AUTOMATIC DATA PROCESSING IN COM 053015103 15,212 7 0.05 4,465 -4.80 0.6503
2025-07-18 2025-06-30 13F AUTOMATIC DATA PROCESSING IN COM 053015103 15,205 -193 -1.25 4,689 -0.32 0.7242
2025-04-17 2025-03-31 13F AUTOMATIC DATA PROCESSING IN COM 053015103 15,398 -193 -1.24 4,705 3.07 0.7628
2025-01-28 2024-12-31 13F AUTOMATIC DATA PROCESSING IN COM 053015103 15,591 -8 -0.05 4,564 5.75 0.7644
2024-10-09 2024-09-30 13F AUTOMATIC DATA PROCESSING IN COM 053015103 15,599 -342 -2.15 4,317 13.46 0.7519
2024-07-18 2024-06-30 13F AUTOMATIC DATA PROCESSING IN COM 053015103 15,941 7 0.04 3,805 -4.40 0.7193
2024-04-18 2024-03-31 13F AUTOMATIC DATA PROCESSING IN COM 053015103 15,934 10 0.06 3,979 7.28 0.7816
2024-01-10 2023-12-31 13F AUTOMATIC DATA PROCESSING IN COM 053015103 15,924 -14 -0.09 3,710 -3.26 0.8059
2023-10-19 2023-09-30 13F AUTOMATIC DATA PROCESSING IN COM 053015103 15,938 -27 -0.17 3,835 9.26 0.9091
2023-08-03 2023-06-30 13F AUTOMATIC DATA PROCESSING IN COM 053015103 15,965 74 0.47 3,509 -0.82 0.8228
2023-04-27 2023-03-31 13F AUTOMATIC DATA PROCESSING IN COM 053015103 15,891 -43 -0.27 3,538 -7.02 0.9074
2023-01-26 2022-12-31 13F AUTOMATIC DATA PROCESSING IN COM 053015103 15,934 7 0.04 3,806 5.64 1.0791
2022-10-26 2022-09-30 13F AUTOMATIC DATA PROCESSING IN COM 053015103 15,927 -72 -0.45 3,602 7.20 1.0794
2022-07-27 2022-06-30 13F AUTOMATIC DATA PROCESSING IN COM 053015103 15,999 7 0.04 3,360 -7.64 0.9716
2022-05-05 2022-03-31 13F AUTOMATIC DATA PROCESSING IN COM 053015103 15,992 -183 -1.13 3,638 -8.78 0.8742
2022-01-31 2021-12-31 13F AUTOMATIC DATA PROCESSING IN COM 053015103 16,175 -100 -0.61 3,988 22.56 0.9514
2021-11-02 2021-09-30 13F AUTOMATIC DATA PROCESSING IN COM 053015103 16,275 17 0.10 3,254 0.77 0.8458
2021-07-28 2021-06-30 13F AUTOMATIC DATA PROCESSING IN COM 053015103 16,258 52 0.32 3,229 5.73 0.8453
2021-05-10 2021-03-31 13F AUTOMATIC DATA PROCESSING IN COM 053015103 16,206 -45 -0.28 3,054 6.63 0.8615
2021-02-09 2020-12-31 13F AUTOMATIC DATA PROCESSING IN COM 053015103 16,251 -150 -0.91 2,864 25.17 0.8789
2020-11-12 2020-09-30 13F AUTOMATIC DATA PROCESSING IN COM 053015103 16,401 -132 -0.80 2,288 -7.03 0.7885
2020-08-11 2020-06-30 13F AUTOMATIC DATA PROCESSING IN COM 053015103 16,533 36 0.22 2,461 9.14 0.9923
2020-05-04 2020-03-31 13F AUTOMATIC DATA PROCESSING IN COM 053015103 16,497 1,174 7.66 2,255 -13.67 1.0296
2020-01-21 2019-12-31 13F AUTOMATIC DATA PROCESSING IN COM 053015103 15,323 -173 -1.12 2,612 4.44 0.9977
2019-11-01 2019-09-30 13F AUTOMATIC DATA PROCESSING IN COM 053015103 15,496 -719 -4.43 2,501 -6.71 1.0389
2019-07-12 2019-06-30 13F AUTOMATIC DATA PROCESSING IN COM 053015103 16,215 -441 -2.65 2,681 0.75 1.1338
2019-04-16 2019-03-31 13F AUTOMATIC DATA PROCESSING IN COM 053015103 16,656 158 0.96 2,661 23.02 1.1884
2019-01-22 2018-12-31 13F AUTOMATIC DATA PROCESSING IN COM 053015103 16,498 -582 -3.41 2,163 -15.93 1.1001
2018-10-26 2018-09-30 13F AUTOMATIC DATA PROCESSING IN COM 053015103 17,080 -19 -0.11 2,573 12.16 1.1759
2018-07-27 2018-06-30 13F AUTOMATIC DATA PROCESSING IN COM 053015103 17,099 -275 -1.58 2,294 16.39 1.1679
2018-04-13 2018-03-31 13F AUTOMATIC DATA PROCESSING IN COM 053015103 17,374 -266 -1.51 1,971 -4.64 1.0243
2018-01-31 2017-12-31 13F/A-1 AUTOMATIC DATA PROCESSING IN COM 053015103 17,640 664 3.91 2,067 6.00 1.0894
2018-01-23 2017-12-31 13F AUTOMATIC DATA PROCESSING IN COM 053015103 16,850 -126 2,091
2017-10-16 2017-09-30 13F AUTOMATIC DATA PROCESSING IN COM 053015103 16,976 557 3.39 1,950 9.74 1.1250
2017-07-12 2017-06-30 13F AUTOMATIC DATA PROCESSING IN COM 053015103 16,419 0 0.00 1,777 1.54 1.0968
2017-04-06 2017-03-31 13F AUTOMATIC DATA PROCESSING IN COM 053015103 16,419 -1,108 -6.32 1,750 -2.83 1.1595
2017-01-06 2016-12-31 13F AUTOMATIC DATA PROCESSING IN COM 053015103 17,527 31 0.18 1,801 16.72 1.2416
2016-11-14 2016-09-30 13F AUTOMATIC DATA PROCESSING IN COM 053015103 17,496 -170 -0.96 1,543 -4.93 1.1089
2016-07-12 2016-06-30 13F AUTOMATIC DATA PROCESSING IN COM 053015103 17,666 -122 -0.69 1,623 1.76 1.2086
2016-04-15 2016-03-31 13F AUTOMATIC DATA PROCESSING IN COM 053015103 17,788 -96 -0.54 1,595 5.49 1.2169
2016-01-26 2015-12-31 13F AUTOMATIC DATA PROCESSING IN COM 053015103 17,884 -436 -2.38 1,512 1.61 1.1995
2015-10-19 2015-09-30 13F AUTOMATIC DATA PROCESSING IN COM 053015103 18,320 -148 -0.80 1,488 0.47 1.2169
2015-07-30 2015-06-30 13F AUTOMATIC DATA PROCESSING IN COM 053015103 18,468 230 1.26 1,481 -5.19 1.1306
2015-04-24 2015-03-31 13F AUTOMATIC DATA PROCESSING IN COM 053015103 18,238 18,238 1,562 1.2040
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.