자동 데이터 처리, Inc.
US ˙ NasdaqGS ˙ US0530151036

SecurityADP / Automatic Data Processing, Inc.
InstitutionJanus Henderson Group Plc
Latest Disclosed Ownership53,557 shares
Latest Disclosed Value $ 10,881,711
Janus Henderson Group Plc reports 3.74% increase in ownership of ADP / Automatic Data Processing, Inc.

On May 18, 2026 - Janus Henderson Group Plc filed a 13F-HR/A form disclosing ownership of 53,557 shares of Automatic Data Processing, Inc. (US:ADP) valued at $10,881,711 USD as of March 31, 2026. The entity filed a previous 13F-HR on February 17, 2026 disclosing 51,627 shares of Automatic Data Processing, Inc.. This represents a change in shares of 3.74% during the quarter. The current value of the position is $12,388,270 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)
2026-05-18 2026-03-31 13F/A-1 AUTOMATIC DATA PROCESSING IN COM 053015103 53,557 1,930 3.74 10,882 -18.07 0.0018
2026-05-15 2026-03-31 13F AUTOMATIC DATA PROCESSING IN COM 053015103 53,557 1,930 3.74 10,882 -18.07 0.0020
2026-02-17 2025-12-31 13F AUTOMATIC DATA PROCESSING IN COM 053015103 51,627 -844,653 -94.24 13,282 -94.95 0.0059
2025-11-14 2025-09-30 13F AUTOMATIC DATA PROCESSING IN COM 053015103 896,280 -341,238 -27.57 263,054 -31.07 0.1201
2025-08-14 2025-06-30 13F AUTOMATIC DATA PROCESSING IN COM 053015103 1,237,518 -113,901 -8.43 381,632 -6.13 0.1871
2025-05-15 2025-03-31 13F AUTOMATIC DATA PROCESSING IN COM 053015103 1,351,419 -344,852 -20.33 406,536 -18.13 0.2228
2025-02-14 2024-12-31 13F AUTOMATIC DATA PROCESSING IN COM 053015103 1,696,271 -82,565 -4.64 496,552 0.87 0.2524
2024-11-14 2024-09-30 13F AUTOMATIC DATA PROCESSING IN COM 053015103 1,778,836 -21,444 -1.19 492,254 14.55 0.2520
2024-08-14 2024-06-30 13F AUTOMATIC DATA PROCESSING IN COM 053015103 1,800,280 69,091 3.99 429,711 -0.61 0.2301
2024-05-15 2024-03-31 13F AUTOMATIC DATA PROCESSING IN COM 053015103 1,731,189 -55,895 -3.13 432,337 3.84 0.2358
2024-02-14 2023-12-31 13F AUTOMATIC DATA PROCESSING IN COM 053015103 1,787,084 160,889 9.89 416,340 6.42 0.2483
2023-11-14 2023-09-30 13F AUTOMATIC DATA PROCESSING IN COM 053015103 1,626,195 -46,236 -2.76 391,234 6.44 0.2562
2023-08-14 2023-06-30 13F AUTOMATIC DATA PROCESSING IN COM 053015103 1,672,431 382,632 29.67 367,579 28.01 0.2286
2023-05-15 2023-03-31 13F AUTOMATIC DATA PROCESSING IN COM 053015103 1,289,799 744,403 136.49 287,141 120.42 0.1893
2023-02-14 2022-12-31 13F AUTOMATIC DATA PROCESSING IN COM 053015103 545,396 -150,223 -21.60 130,272 -17.22 0.0931
2023-01-13 2022-09-30 13F/A-1 AUTOMATIC DATA PROCESSING IN COM 053015103 695,619 -19,223 -2.69 157,362 4.79 0.1179
2022-11-14 2022-09-30 13F AUTOMATIC DATA PROCESSING IN COM 053015103 695,619 -19,223 157,362 0.1178
2022-08-15 2022-06-30 13F AUTOMATIC DATA PROCESSING IN COM 053015103 714,842 -104,188 -12.72 150,168 -19.43 0.1035
2022-05-16 2022-03-31 13F AUTOMATIC DATA PROCESSING IN COM 053015103 819,030 116,395 16.57 186,371 7.56 0.0900
2022-02-14 2021-12-31 13F AUTOMATIC DATA PROCESSING IN COM 053015103 702,635 30,916 4.60 173,271 29.04 0.0723
2021-11-16 2021-09-30 13F AUTOMATIC DATA PROCESSING IN COM 053015103 671,719 7,903 1.19 134,278 1.84 0.0587
2021-08-16 2021-06-30 13F AUTOMATIC DATA PROCESSING IN COM 053015103 663,816 -12,680 -1.87 131,853 3.41 0.0564
2021-05-17 2021-03-31 13F AUTOMATIC DATA PROCESSING IN COM 053015103 676,496 -138,563 -17.00 127,502 -11.22 0.0582
2021-02-16 2020-12-31 13F AUTOMATIC DATA PROCESSING IN COM 053015103 815,059 -268,842 -24.80 143,616 -5.01 0.0667
2020-11-16 2020-09-30 13F AUTOMATIC DATA PROCESSING IN COM 053015103 1,083,901 277,082 34.34 151,193 25.86 0.0788
2020-08-14 2020-06-30 13F AUTOMATIC DATA PROCESSING IN COM 053015103 806,819 -228,387 -22.06 120,127 -15.10 0.0674
2020-05-14 2020-03-31 13F AUTOMATIC DATA PROCESSING IN COM 053015103 1,035,206 -248,243 -19.34 141,500 -35.34 0.0974
2020-02-18 2019-12-31 13F AUTOMATIC DATA PROCESSING IN COM 053015103 1,283,449 -657,467 -33.87 218,826 -30.15 0.1120
2019-11-14 2019-09-30 13F AUTOMATIC DATA PROCESSING IN COM 053015103 1,940,916 -150,678 -7.20 313,301 -9.40 0.1697
2019-07-31 2019-06-30 13F AUTOMATIC DATA PROCESSING IN COM 053015103 2,091,594 -47,428 -2.22 345,807 1.20 0.1883
2019-04-30 2019-03-31 13F AUTOMATIC DATA PROCESSING IN COM 053015103 2,139,022 184,671 9.45 341,692 33.34 0.1894
2019-02-06 2018-12-31 13F AUTOMATIC DATA PROCESSING IN COM 053015103 1,954,351 233,104 13.54 256,259 -1.18 0.1634
2018-11-09 2018-09-30 13F AUTOMATIC DATA PROCESSING IN COM 053015103 1,721,247 74,839 4.55 259,324 17.42 0.1386
2018-08-10 2018-06-30 13F AUTOMATIC DATA PROCESSING IN COM 053015103 1,646,408 -666,036 -28.80 220,849 -15.84 0.1259
2018-05-14 2018-03-31 13F AUTOMATIC DATA PROCESSING IN COM 053015103 2,312,444 -525,151 -18.51 262,417 -21.09 0.1546
2018-03-12 2017-12-31 13F/A-1 AUTOMATIC DATA PROCESSING IN COM 053015103 2,837,595 -726,229 -20.38 332,538 -14.65 0.2048
2018-02-09 2017-12-31 13F AUTOMATIC DATA PROCESSING IN COM 053015103 2,837,595 -726,229 332,538
2017-11-14 2017-09-30 13F AUTOMATIC DATA PROCESSING IN COM 053015103 3,563,824 -450,041 -11.21 389,597 -5.27 0.2497
2017-08-17 2017-06-30 13F/A-1 AUTOMATIC DATA PROCESSING IN COM 053015103 4,013,865 3,947,657 5,962.51 411,260 5,967.57 0.2803
2017-08-14 2017-06-30 13F AUTOMATIC DATA PROCESSING IN COM 053015103 4,013,865 3,947,657 411,260
2017-05-03 2017-03-31 13F AUTOMATIC DATA PROCESSING IN COM 053015103 66,208 -1,672 -2.46 6,778 -2.85 0.0476
2017-01-30 2016-12-31 13F AUTOMATIC DATA PROCESSING IN COM 053015103 67,880 4,487 7.08 6,977 24.79 0.0515
2016-10-24 2016-09-30 13F AUTOMATIC DATA PROCESSING IN COM 053015103 63,393 0 0.00 5,591 -4.00 0.0412
2016-07-29 2016-06-30 13F AUTOMATIC DATA PROCESSING IN COM 053015103 63,393 -5,579 -8.09 5,824 -5.87 0.0484
2016-05-12 2016-03-31 13F AUTOMATIC DATA PROCESSING IN COM 053015103 68,972 0 0.00 6,187 5.87 0.0502
2016-02-03 2015-12-31 13F AUTOMATIC DATA PROCESSING IN COM 053015103 68,972 0 0.00 5,844 5.49 0.0469
2015-11-16 2015-09-30 13F AUTOMATIC DATA PROCESSING IN COM 053015103 68,972 0 0.00 5,540 0.13 0.0488
2015-08-17 2015-06-30 13F AUTOMATIC DATA PROCESSING IN COM 053015103 68,972 -2,223 -3.12 5,533 -9.25 0.0435
2015-06-02 2015-03-31 13F/A-1 AUTOMATIC DATA PROCESSING IN COM 053015103 71,195 -7,227 -9.22 6,097 -6.76 0.0470
2015-05-15 2015-03-31 13F AUTOMATIC DATA PROCESSING IN COM 053015103 71,195 6,097
2015-02-12 2014-12-31 13F AUTOMATIC DATA PROCESSING IN COM 053015103 78,422 -409 -0.52 6,539 -0.14 0.0471
2014-11-12 2014-09-30 13F AUTOMATIC DATA PROCESSING IN COM 053015103 78,831 -5,187 -6.17 6,548 -1.70 0.0616
2014-08-13 2014-06-30 13F AUTOMATIC DATA PROCESSING IN COM 053015103 84,018 0 0.00 6,661 2.62 0.0622
2014-05-08 2014-03-31 13F AUTOMATIC DATA PROCESSING IN COM 053015103 84,018 526 0.63 6,491 -3.78 0.0632
2014-01-14 2013-12-31 13F AUTOMATIC DATA PROCESSING IN COM 053015103 83,492 0 0.00 6,746 11.63 0.0682
2013-11-12 2013-09-30 13F AUTOMATIC DATA PROCESSING IN COM 053015103 83,492 -473 -0.56 6,043 3.64 0.0667
2013-08-15 2013-06-30 13F AUTOMATIC DATA PROCESSING IN COM 053015103 83,965 83,965 5,831 0.0682
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.