Automatic Data Processing, Inc.
US ˙ NasdaqGS ˙ US0530151036

SecurityADP / Automatic Data Processing, Inc.
InstitutionAlliancebernstein L.p.
Latest Disclosed Ownership5,101,809 shares
Latest Disclosed Value $ 1,312,338,329
Alliancebernstein L.p. reports 14.76% decrease in ownership of ADP / Automatic Data Processing, Inc.

On May 15, 2026 - Alliancebernstein L.p. filed a 13F-HR form disclosing ownership of 5,101,809 shares of Automatic Data Processing, Inc. (US:ADP) valued at $1,036,585,553 USD as of March 31, 2026. The entity filed a previous 13F-HR on February 17, 2026 disclosing 5,985,052 shares of Automatic Data Processing, Inc.. This represents a change in shares of -14.76% during the quarter. The current value of the position is $1,180,099,440 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)
2026-05-15 2026-03-31 13F AUTOMATIC DATA PROCESSING IN COM 053015103 5,101,809 -883,243 -14.76 1,312,338 -14.76 0.3551
2026-02-17 2025-12-31 13F AUTOMATIC DATA PROCESSING IN COM 053015103 5,985,052 -608,877 -9.23 1,539,535 -20.45 0.4862
2025-11-14 2025-09-30 13F AUTOMATIC DATA PROCESSING IN COM 053015103 6,593,929 -541,539 -7.59 1,935,318 -12.05 0.6094
2025-08-14 2025-06-30 13F AUTOMATIC DATA PROCESSING IN COM 053015103 7,135,468 -261,523 -3.54 2,200,578 -2.63 0.7177
2025-05-15 2025-03-31 13F AUTOMATIC DATA PROCESSING IN COM 053015103 7,396,991 -177,056 -2.34 2,260,003 1.93 0.8176
2025-02-12 2024-12-31 13F AUTOMATIC DATA PROCESSING IN COM 053015103 7,574,047 9,091 0.12 2,217,151 5.91 0.7524
2024-11-14 2024-09-30 13F AUTOMATIC DATA PROCESSING IN COM 053015103 7,564,956 -16,120 -0.21 2,093,450 15.69 0.7031
2024-08-14 2024-06-30 13F AUTOMATIC DATA PROCESSING IN COM 053015103 7,581,076 -297,929 -3.78 1,809,527 -8.04 0.6310
2024-05-14 2024-03-31 13F AUTOMATIC DATA PROCESSING IN COM 053015103 7,879,005 -485,571 -5.81 1,967,703 0.98 0.6963
2024-02-14 2023-12-31 13F AUTOMATIC DATA PROCESSING IN COM 053015103 8,364,576 -213,341 -2.49 1,948,695 -5.57 0.7499
2023-11-14 2023-09-30 13F AUTOMATIC DATA PROCESSING IN COM 053015103 8,577,917 -55,316 -0.64 2,063,675 8.76 0.8778
2023-08-15 2023-06-30 13F AUTOMATIC DATA PROCESSING IN COM 053015103 8,633,233 -210,116 -2.38 1,897,498 -3.62 0.7744
2023-05-15 2023-03-31 13F AUTOMATIC DATA PROCESSING IN COM 053015103 8,843,349 -146,094 -1.63 1,968,795 -8.31 0.8436
2023-02-15 2022-12-31 13F AUTOMATIC DATA PROCESSING IN COM 053015103 8,989,443 -241,963 -2.62 2,147,218 2.83 0.9664
2022-11-15 2022-09-30 13F AUTOMATIC DATA PROCESSING IN COM 053015103 9,231,406 -587,140 -5.98 2,088,052 1.25 1.0109
2022-08-15 2022-06-30 13F AUTOMATIC DATA PROCESSING IN COM 053015103 9,818,546 25,960 0.27 2,062,287 -7.45 0.9419
2022-05-13 2022-03-31 13F AUTOMATIC DATA PROCESSING IN COM 053015103 9,792,586 240,006 2.51 2,228,205 -5.40 0.8599
2022-02-14 2021-12-31 13F AUTOMATIC DATA PROCESSING IN COM 053015103 9,552,580 -24,444 -0.26 2,355,475 23.02 0.8327
2021-11-10 2021-09-30 13F AUTOMATIC DATA PROCESSING IN COM 053015103 9,577,024 -821,108 -7.90 1,914,639 -7.29 0.7553
2021-07-30 2021-06-30 13F AUTOMATIC DATA PROCESSING IN COM 053015103 10,398,132 -1,038,910 -9.08 2,065,277 -4.19 0.8291
2021-05-06 2021-03-31 13F AUTOMATIC DATA PROCESSING IN COM 053015103 11,437,042 280,354 2.51 2,155,539 9.65 0.9452
2021-02-08 2020-12-31 13F AUTOMATIC DATA PROCESSING IN COM 053015103 11,156,688 33,162 0.30 1,965,809 26.69 0.9277
2020-11-12 2020-09-30 13F AUTOMATIC DATA PROCESSING IN COM 053015103 11,123,526 62,980 0.57 1,551,621 -5.78 0.8351
2020-08-13 2020-06-30 13F AUTOMATIC DATA PROCESSING IN COM 053015103 11,060,546 1,499,543 15.68 1,646,805 26.02 0.9677
2020-05-14 2020-03-31 13F AUTOMATIC DATA PROCESSING IN COM 053015103 9,561,003 2,021,774 26.82 1,306,798 1.66 0.9369
2020-02-18 2019-12-31 13F AUTOMATIC DATA PROCESSING IN COM 053015103 7,539,229 600,396 8.65 1,285,439 14.76 0.7305
2019-11-14 2019-09-30 13F AUTOMATIC DATA PROCESSING IN COM 053015103 6,938,833 39,989 0.58 1,120,066 -1.80 0.6974
2019-08-14 2019-06-30 13F AUTOMATIC DATA PROCESSING IN COM 053015103 6,898,844 37,100 0.54 1,140,586 4.06 0.7086
2019-05-14 2019-03-31 13F AUTOMATIC DATA PROCESSING IN COM 053015103 6,861,744 939,719 15.87 1,096,095 41.16 0.7134
2019-02-13 2018-12-31 13F AUTOMATIC DATA PROCESSING IN COM 053015103 5,922,025 474,937 8.72 776,496 -5.38 0.5765
2018-11-08 2018-09-30 13F AUTOMATIC DATA PROCESSING IN COM 053015103 5,447,088 -21,039 -0.38 820,658 11.88 0.5359
2018-08-13 2018-06-30 13F AUTOMATIC DATA PROCESSING IN COM 053015103 5,468,127 -2,949 -0.05 733,495 18.14 0.5105
2018-05-14 2018-03-31 13F AUTOMATIC DATA PROCESSING IN COM 053015103 5,471,076 4,046 0.07 620,858 -3.09 0.4489
2018-02-13 2017-12-31 13F AUTOMATIC DATA PROCESSING IN COM 053015103 5,467,030 -476,216 -8.01 640,681 -1.39 0.4583
2017-11-13 2017-09-30 13F AUTOMATIC DATA PROCESSING IN COM 053015103 5,943,246 -2,229,491 -27.28 649,716 -22.41 0.4866
2017-08-10 2017-06-30 13F AUTOMATIC DATA PROCESSING IN COM 053015103 8,172,737 -172,954 -2.07 837,378 -2.01 0.6477
2017-05-11 2017-03-31 13F AUTOMATIC DATA PROCESSING IN COM 053015103 8,345,691 485,320 6.17 854,515 5.77 0.6803
2017-02-13 2016-12-31 13F AUTOMATIC DATA PROCESSING IN COM 053015103 7,860,371 -351,332 -4.28 807,889 11.54 0.6732
2016-11-10 2016-09-30 13F AUTOMATIC DATA PROCESSING IN COM 053015103 8,211,703 -178,994 -2.13 724,272 -6.04 0.6112
2016-08-11 2016-06-30 13F AUTOMATIC DATA PROCESSING IN COM 053015103 8,390,697 -69,859 -0.83 770,853 1.56 0.6638
2016-05-13 2016-03-31 13F AUTOMATIC DATA PROCESSING IN COM 053015103 8,460,556 142,006 1.71 758,996 7.70 0.6451
2016-02-16 2015-12-31 13F/A-1 AUTOMATIC DATA PROCESSING IN COM 053015103 8,318,550 48,321 0.58 704,747 6.04 0.5997
2016-02-12 2015-12-31 13F AUTOMATIC DATA PROCESSING IN COM 053015103 8,318,550 668,478
2015-11-13 2015-09-30 13F AUTOMATIC DATA PROCESSING IN COM 053015103 8,270,229 2,324,066 39.09 664,596 39.31 0.5704
2015-08-14 2015-06-30 13F AUTOMATIC DATA PROCESSING IN COM 053015103 5,946,163 -40,469 -0.68 477,061 -6.95 0.3941
2015-05-13 2015-03-31 13F AUTOMATIC DATA PROCESSING INC COM 053015103 5,986,632 7,909 0.13 512,695 2.86 0.4156
2015-02-13 2014-12-31 13F AUTOMATIC DATA PROCESSING INC COM 053015103 5,978,723 -14,803 -0.25 498,446 0.10 0.4139
2014-11-13 2014-09-30 13F AUTOMATIC DATA PROCESSING INC COM 053015103 5,993,526 8,923 0.15 497,942 4.95 0.4194
2014-08-13 2014-06-30 13F AUTOMATIC DATA PROCESSING INC COM 053015103 5,984,603 -13,592 -0.23 474,459 2.38 0.3999
2014-05-13 2014-03-31 13F AUTOMATIC DATA PROCESSING INC COM 053015103 5,998,195 -17,024 -0.28 463,420 -4.66 0.4004
2014-02-13 2013-12-31 13F AUTOMATIC DATA PROCESSING INC COM 053015103 6,015,219 -87,562 -1.43 486,090 10.05 0.4345
2013-11-14 2013-09-30 13F AUTOMATIC DATA PROCESSING INC COM 053015103 6,102,781 -4,459 -0.07 441,719 5.03 0.4363
2013-08-13 2013-06-30 13F AUTOMATIC DATA PROCESSING INC COM 053015103 6,107,240 6,107,240 420,545 0.4464
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.