Automatic Data Processing, Inc.
US ˙ NasdaqGS ˙ US0530151036

SecurityADP / Automatic Data Processing, Inc.
InstitutionDimensional Fund Advisors Lp
Latest Disclosed Ownership2,413,934 shares
Latest Disclosed Value $ 490,529,508
Dimensional Fund Advisors Lp reports 0.45% increase in ownership of ADP / Automatic Data Processing, Inc.

On May 7, 2026 - Dimensional Fund Advisors Lp filed a 13F-HR form disclosing ownership of 2,413,934 shares of Automatic Data Processing, Inc. (US:ADP) valued at $490,463,110 USD as of March 31, 2026. The entity filed a previous 13F-HR on February 12, 2026 disclosing 2,403,234 shares of Automatic Data Processing, Inc.. This represents a change in shares of 0.45% during the quarter. The current value of the position is $549,773,468 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 2,413,934 10,700 0.45 490,530 -20.66 0.0220
2026-02-12 2025-12-31 13F AUTOMATIC DATA PROCESSING IN COM 053015103 2,403,234 -5,649 -0.23 618,238 -12.55 0.1297
2025-11-12 2025-09-30 13F AUTOMATIC DATA PROCESSING IN COM 053015103 2,408,883 19,536 0.82 706,987 -4.05 0.1517
2025-08-12 2025-06-30 13F AUTOMATIC DATA PROCESSING IN COM 053015103 2,389,347 -85,307 -3.45 736,798 -2.54 0.1706
2025-05-13 2025-03-31 13F AUTOMATIC DATA PROCESSING IN COM 053015103 2,474,654 46,529 1.92 755,996 6.36 0.1879
2025-02-13 2024-12-31 13F AUTOMATIC DATA PROCESSING IN COM 053015103 2,428,125 -2,071 -0.09 710,795 5.70 0.1707
2024-11-07 2024-09-30 13F AUTOMATIC DATA PROCESSING IN COM 053015103 2,430,196 133,852 5.83 672,452 22.69 0.1631
2024-08-09 2024-06-30 13F AUTOMATIC DATA PROCESSING IN COM 053015103 2,296,344 269,986 13.32 548,099 8.31 0.1432
2024-05-10 2024-03-31 13F AUTOMATIC DATA PROCESSING IN COM 053015103 2,026,358 55,893 2.84 506,063 10.24 0.1370
2024-02-07 2023-12-31 13F AUTOMATIC DATA PROCESSING IN COM 053015103 1,970,465 54,816 2.86 459,057 -0.40 0.1340
2023-11-09 2023-09-30 13F AUTOMATIC DATA PROCESSING IN COM 053015103 1,915,649 31,756 1.69 460,890 11.31 0.1512
2023-08-09 2023-06-30 13F AUTOMATIC DATA PROCESSING IN COM 053015103 1,883,893 70,222 3.87 414,042 2.55 0.1320
2023-05-12 2023-03-31 13F AUTOMATIC DATA PROCESSING IN COM 053015103 1,813,671 18,766 1.05 403,758 94,235.98 0.1360
2023-02-09 2022-12-31 13F AUTOMATIC DATA PROCESSING IN COM 053015103 1,794,905 1,889 0.11 429 -99.89 0.1267
2022-11-10 2022-09-30 13F AUTOMATIC DATA PROCESSING IN COM 053015103 1,793,016 34,652 1.97 405,579 9.82 0.1557
2022-08-12 2022-06-30 13F AUTOMATIC DATA PROCESSING IN COM 053015103 1,758,364 -11,801 -0.67 369,328 -8.31 0.1325
2022-05-13 2022-03-31 13F AUTOMATIC DATA PROCESSING IN COM 053015103 1,770,165 -18,955 -1.06 402,786 -8.70 0.1241
2022-02-09 2021-12-31 13F AUTOMATIC DATA PROCESSING IN COM 053015103 1,789,120 -14,441 -0.80 441,149 22.35 0.1334
2021-11-12 2021-09-30 13F AUTOMATIC DATA PROCESSING IN COM 053015103 1,803,561 -21,705 -1.19 360,573 -0.54 0.1161
2021-08-12 2021-06-30 13F AUTOMATIC DATA PROCESSING IN COM 053015103 1,825,266 -20,094 -1.09 362,523 4.24 0.1148
2021-05-14 2021-03-31 13F AUTOMATIC DATA PROCESSING IN COM 053015103 1,845,360 59,490 3.33 347,790 10.53 0.1150
2021-03-08 2020-12-31 13F/A-2 AUTOMATIC DATA PROCESSING IN COM 053015103 1,785,870 28,003 1.59 314,644 28.34 0.1136
2021-02-11 2020-12-31 13F AUTOMATIC DATA PROCESSING IN COM 053015103 1,785,870 28,003 314,644 113,632.6886
2020-11-12 2020-09-30 13F AUTOMATIC DATA PROCESSING IN COM 053015103 1,757,867 107,133 6.49 245,167 -0.24 0.1040
2020-08-13 2020-06-30 13F AUTOMATIC DATA PROCESSING IN COM 053015103 1,650,734 81,096 5.17 245,751 14.55 0.1080
2020-05-14 2020-03-31 13F AUTOMATIC DATA PROCESSING IN COM 053015103 1,569,638 106,507 7.28 214,543 -14.00 0.1118
2020-02-14 2019-12-31 13F AUTOMATIC DATA PROCESSING IN COM 053015103 1,463,131 41,255 2.90 249,458 8.69 0.0909
2019-11-12 2019-09-30 13F AUTOMATIC DATA PROCESSING IN COM 053015103 1,421,876 52,753 3.85 229,515 1.40 0.0892
2019-08-13 2019-06-30 13F AUTOMATIC DATA PROCESSING IN COM 053015103 1,369,123 49,188 3.73 226,351 7.36 0.0879
2019-08-12 2019-03-31 13F/A-2 AUTOMATIC DATA PROCESSING IN COM 053015103 1,319,935 20,667 1.59 210,842 23.77 0.0840
2019-05-10 2019-03-31 13F AUTOMATIC DATA PROCESSING IN COM 053015103 1,319,935 20,667 210,842
2019-02-26 2018-12-31 13F/A-1 AUTOMATIC DATA PROCESSING IN COM 053015103 1,299,268 49,730 3.98 170,354 -9.51 0.0772
2019-02-13 2018-12-31 13F AUTOMATIC DATA PROCESSING IN COM 053015103 1,299,268 49,730 170,354
2018-11-13 2018-09-30 13F AUTOMATIC DATA PROCESSING IN COM 053015103 1,249,538 76,125 6.49 188,249 19.60 0.0717
2018-08-10 2018-06-30 13F AUTOMATIC DATA PROCESSING IN COM 053015103 1,173,413 27,427 2.39 157,404 21.04 0.0628
2018-05-11 2018-03-31 13F AUTOMATIC DATA PROCESSING IN COM 053015103 1,145,986 25,256 2.25 130,046 -0.99 0.0542
2018-02-12 2017-12-31 13F AUTOMATIC DATA PROCESSING IN COM 053015103 1,120,730 13,574 1.23 131,342 8.52 0.0544
2017-11-13 2017-09-30 13F AUTOMATIC DATA PROCESSING IN COM 053015103 1,107,156 2,435 0.22 121,032 6.93 0.0529
2017-08-11 2017-06-30 13F AUTOMATIC DATA PROCESSING IN COM 053015103 1,104,721 75,384 7.32 113,185 7.40 0.0523
2017-05-12 2017-03-31 13F AUTOMATIC DATA PROCESSING IN COM 053015103 1,029,337 57,896 5.96 105,391 5.55 0.0504
2017-02-09 2016-12-31 13F AUTOMATIC DATA PROCESSING IN COM 053015103 971,441 85,144 9.61 99,850 27.74 0.0499
2016-11-10 2016-09-30 13F AUTOMATIC DATA PROCESSING IN COM 053015103 886,297 18,472 2.13 78,166 -1.94 0.0422
2016-08-09 2016-06-30 13F AUTOMATIC DATA PROCESSING IN COM 053015103 867,825 11,487 1.34 79,711 3.77 0.0459
2016-05-13 2016-03-31 13F AUTOMATIC DATA PROCESSING IN COM 053015103 856,338 28,017 3.38 76,818 9.45 0.0460
2016-02-10 2015-12-31 13F AUTOMATIC DATA PROCESSING IN COM 053015103 828,321 43,816 5.59 70,186 11.34 0.0437
2015-11-13 2015-09-30 13F AUTOMATIC DATA PROCESSING IN COM 053015103 784,505 16,276 2.12 63,040 2.27 0.0414
2015-08-14 2015-06-30 13F AUTOMATIC DATA PROCESSING IN COM 053015103 768,229 43,868 6.06 61,642 -0.63 0.0377
2015-05-14 2015-03-31 13F AUTOMATIC DATA PROCESSING IN COM 053015103 724,361 73,300 11.26 62,033 14.27 0.0392
2015-02-06 2014-12-31 13F AUTOMATIC DATA PROCESSING IN COM 053015103 651,061 31,485 5.08 54,284 5.46 0.0357
2014-11-13 2014-09-30 13F AUTOMATIC DATA PROCESSING IN COM 053015103 619,576 53,472 9.45 51,474 14.69 0.0365
2014-08-08 2014-06-30 13F AUTOMATIC DATA PROCESSING IN COM 053015103 566,104 56,948 11.18 44,881 14.10 0.0312
2014-05-14 2014-03-31 13F AUTOMATIC DATA PROCESSING IN COM 053015103 509,156 12,678 2.55 39,335 -1.96 0.0294
2014-02-12 2013-12-31 13F AUTOMATIC DATA PROCESSING IN COM 053015103 496,478 19,955 4.19 40,122 16.33 0.0313
2013-11-13 2013-09-30 13F AUTOMATIC DATA PROCESSING IN COM 053015103 476,523 11,045 2.37 34,489 7.59 0.0299
2013-08-15 2013-06-30 13F AUTOMATIC DATA PROCESSING IN COM 053015103 465,478 465,478 32,056 0.0302
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.