Automatic Data Processing, Inc.
US ˙ NasdaqGS ˙ US0530151036

SecurityADP / Automatic Data Processing, Inc.
InstitutionBaxter Bros Inc
Latest Disclosed Ownership78,635 shares
Latest Disclosed Value $ 15,977,059
Baxter Bros Inc reports 1.47% decrease in ownership of ADP / Automatic Data Processing, Inc.

On April 28, 2026 - Baxter Bros Inc filed a 13F-HR form disclosing ownership of 78,635 shares of Automatic Data Processing, Inc. (US:ADP) valued at $15,977,059 USD as of March 31, 2026. The entity filed a previous 13F-HR on January 26, 2026 disclosing 79,805 shares of Automatic Data Processing, Inc.. This represents a change in shares of -1.47% during the quarter. The current value of the position is $17,909,121 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 78,635 -1,170 -1.47 15,977 -22.17 1.9722
2026-01-26 2025-12-31 13F AUTOMATIC DATA PROCESSING IN COM 053015103 79,805 -3,244 -3.91 20,528 -15.78 2.3755
2025-10-14 2025-09-30 13F AUTOMATIC DATA PROCESSING IN COM 053015103 83,049 3,935 4.97 24,375 -0.10 2.8175
2025-07-24 2025-06-30 13F AUTOMATIC DATA PROCESSING IN COM 053015103 79,114 -1,239 -1.54 24,399 -0.62 2.9843
2025-04-09 2025-03-31 13F AUTOMATIC DATA PROCESSING IN COM 053015103 80,353 -1,468 -1.79 24,550 2.50 3.2335
2025-02-12 2024-12-31 13F AUTOMATIC DATA PROCESSING IN COM 053015103 81,821 -750 -0.91 23,951 4.82 3.1330
2024-10-29 2024-09-30 13F AUTOMATIC DATA PROCESSING IN COM 053015103 82,571 -1,477 -1.76 22,850 13.90 2.9707
2024-07-15 2024-06-30 13F AUTOMATIC DATA PROCESSING IN COM 053015103 84,048 -415 -0.49 20,061 -4.89 2.6259
2024-04-29 2024-03-31 13F AUTOMATIC DATA PROCESSING IN COM 053015103 84,463 -955 -1.12 21,094 6.00 2.7055
2024-05-17 2023-12-31 13F/A-1 AUTOMATIC DATA PROCESSING IN COM 053015103 85,418 -933 -1.08 19,900 -4.21 2.7567
2024-02-06 2023-12-31 13F Automatic Data Proc. COM 053015103 85,183 -1,168 19,845 2.8052
2024-05-17 2023-09-30 13F/A-1 AUTOMATIC DATA PROCESSING IN COM 053015103 86,351 1,587 1.87 20,774 11.51 3.1536
2023-10-23 2023-09-30 13F Automatic Data Proc. COM 053015103 86,416 1,652 20,790 3.1964
2023-08-14 2023-06-30 13F Automatic Data Proc. COM 053015103 84,764 2,039 2.46 18,630 1.16 2.7708
2023-05-15 2023-03-31 13F Automatic Data Proc. COM 053015103 82,725 -1,529 -1.81 18,417 -8.49 2.8953
2023-02-01 2022-12-31 13F Automatic Data Proc. COM 053015103 84,254 -1,400 -1.63 20,125 3.88 3.3086
2022-11-14 2022-09-30 13F Automatic Data Proc. COM 053015103 85,654 -2,539 -2.88 19,374 4.59 3.4333
2022-07-25 2022-06-30 13F Automatic Data Proc. COM 053015103 88,193 -1,289 -1.44 18,524 -9.02 3.3240
2022-04-20 2022-03-31 13F Automatic Data Proc. COM 053015103 89,482 -354 -0.39 20,361 -8.09 3.0577
2022-01-14 2021-12-31 13F Automatic Data Proc. COM 053015103 89,836 -226 -0.25 22,152 23.03 3.2105
2021-10-25 2021-09-30 13F Automatic Data Proc. COM 053015103 90,062 141 0.16 18,005 0.81 2.8820
2021-08-11 2021-06-30 13F Automatic Data Proc. COM 053015103 89,921 1,391 1.57 17,860 7.04 2.8299
2021-04-23 2021-03-31 13F Automatic Data Proc. COM 053015103 88,530 3,142 3.68 16,685 10.90 2.8665
2021-01-25 2020-12-31 13F Automatic Data Proc. COM 053015103 85,388 2,485 3.00 15,045 30.10 2.8498
2020-11-05 2020-09-30 13F Automatic Data Proc. COM 053015103 82,903 15,902 23.73 11,564 15.92 2.5009
2020-07-31 2020-06-30 13F Automatic Data Proc. COM 053015103 67,001 -120 -0.18 9,976 8.74 2.3411
2020-04-17 2020-03-31 13F Automatic Data Proc. COM 053015103 67,121 10,885 19.36 9,174 -4.32 2.3764
2020-01-10 2019-12-31 13F/A-20 Automatic Data Proc. COM 053015103 56,236 4,650 9.01 9,588 15.14 1.9958
2020-01-09 2019-12-31 13F Automatic Data Proc. COM 053015103 28,289 -23,297 2,358 838,167.5482
2019-10-21 2019-09-30 13F Automatic Data Proc. COM 053015103 51,586 -995 -1.89 8,327 -4.21 1.8851
2019-07-29 2019-06-30 13F Automatic Data Proc. COM 053015103 52,581 625 1.20 8,693 4.75 1.9861
2019-04-22 2019-03-31 13F Automatic Data Proc. COM 053015103 51,956 190 0.37 8,299 22.26 1.9387
2019-01-22 2018-12-31 13F Automatic Data Proc. COM 053015103 51,766 -735 -1.40 6,788 -14.18 1.8415
2018-10-11 2018-09-30 13F Automatic Data Proc. COM 053015103 52,501 3,832 7.87 7,910 21.17 1.8983
2018-07-17 2018-06-30 13F Automatic Data Proc. COM 053015103 48,669 26 0.05 6,528 18.26 1.7550
2018-05-16 2018-03-31 13F Automatic Data Proc. COM 053015103 48,643 -51 -0.10 5,520 -3.26 1.5057
2018-02-01 2017-12-31 13F Automatic Data Proc. COM 053015103 48,694 1,220 2.57 5,706 9.94 1.5636
2017-10-16 2017-09-30 13F Automatic Data Proc. COM 053015103 47,474 -440 -0.92 5,190 5.72 1.4914
2017-08-01 2017-06-30 13F Automatic Data Proc. COM 053015103 47,914 1,865 4.05 4,909 4.11 1.4778
2017-04-24 2017-03-31 13F Automatic Data Proc. COM 053015103 46,049 795 1.76 4,715 1.38 1.4747
2017-01-19 2016-12-31 13F Automatic Data Proc. COM 053015103 45,254 10,306 29.49 4,651 50.91 1.4974
2016-10-20 2016-09-30 13F Automatic Data Proc. COM 053015103 34,948 1,446 4.32 3,082 0.13 1.0418
2016-07-07 2016-06-30 13F Automatic Data Proc. COM 053015103 33,502 4,535 15.66 3,078 25.43 1.0763
2016-02-08 2015-12-31 13F Automatic Data Proc. COM 053015103 28,967 1,340 4.85 2,454 10.69 0.9093
2015-10-05 2015-09-30 13F Automatic Data Proc. COM 053015103 27,627 0 0.00 2,217 0.00 0.8140
2015-07-07 2015-06-30 13F Automatic Data Proc. COM 053015103 27,627 -266 -0.95 2,217 -7.20 0.8133
2015-04-16 2015-03-31 13F Automatic Data Proc. COM 053015103 27,893 -396 -1.40 2,389 1.31 0.8690
2015-01-22 2014-12-31 13F Automatic Data Proc. COM 053015103 28,289 7,103 33.53 2,358 33.98 0.8532
2014-11-04 2014-09-30 13F Automatic Data Proc. COM 053015103 21,186 -496 -2.29 1,760 2.39 0.6847
2014-07-11 2014-06-30 13F Automatic Data Proc. COM 053015103 21,682 104 0.48 1,719 3.12 0.7078
2014-04-08 2014-03-31 13F Automatic Data Proc. COM 053015103 21,578 -447 -2.03 1,667 -6.35 0.7567
2014-02-10 2013-12-31 13F Automatic Data Proc. COM 053015103 22,025 -46 -0.21 1,780 11.39 0.8336
2013-10-28 2013-09-30 13F Automatic Data Proc. COM 053015103 22,071 -198 -0.89 1,598 4.24 0.8734
2013-08-21 2013-06-30 13F Automatic Data Proc. COM 053015103 22,269 22,269 1,533 0.9294
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.