Automatic Data Processing, Inc.
US ˙ NasdaqGS ˙ US0530151036

SecurityADP / Automatic Data Processing, Inc.
InstitutionMackenzie Financial Corp
Latest Disclosed Ownership521,700 shares
Latest Disclosed Value $ 105,999,006
Mackenzie Financial Corp reports 15.41% decrease in ownership of ADP / Automatic Data Processing, Inc.

On May 13, 2026 - Mackenzie Financial Corp filed a 13F-HR form disclosing ownership of 521,700 shares of Automatic Data Processing, Inc. (US:ADP) valued at $105,999,006 USD as of March 31, 2026. The entity filed a previous 13F-HR on February 18, 2026 disclosing 616,754 shares of Automatic Data Processing, Inc.. This represents a change in shares of -15.41% during the quarter. The current value of the position is $120,674,427 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)
2026-05-13 2026-03-31 13F AUTOMATIC DATA PROCESSING IN COM 053015103 521,700 -95,054 -15.41 105,999 -33.65 0.1272
2026-02-18 2025-12-31 13F AUTOMATIC DATA PROCESSING IN COM 053015103 616,754 -879,175 -58.77 159,751 -63.61 0.1892
2025-11-13 2025-09-30 13F AUTOMATIC DATA PROCESSING IN COM 053015103 1,495,929 -288,849 -16.18 439,055 -20.23 0.5318
2025-08-13 2025-06-30 13F AUTOMATIC DATA PROCESSING IN COM 053015103 1,784,778 199,074 12.55 550,426 13.61 0.7131
2025-05-07 2025-03-31 13F AUTOMATIC DATA PROCESSING IN COM 053015103 1,585,704 890,440 128.07 484,480 138.05 0.6889
2025-05-02 2024-12-31 13F/A-2 AUTOMATIC DATA PROCESSING IN COM 053015103 695,264 -20,627 -2.88 203,525 2.73 0.2773
2025-02-20 2024-12-31 13F/A-1 AUTOMATIC DATA PROCESSING IN COM 053015103 695,264 -20,627 203,525 0.2644
2025-02-14 2024-12-31 13F Automatic Data Processing Common Stock 053015103 695,264 -20,627 198,959 0.2856
2024-11-13 2024-09-30 13F AUTOMATIC DATA PROCESSING IN COM 053015103 715,891 71,756 11.14 198,109 28.85 0.2757
2024-08-14 2024-06-30 13F AUTOMATIC DATA PROCESSING IN COM 053015103 644,135 456,027 242.43 153,749 227.28 0.2285
2024-05-10 2024-03-31 13F AUTOMATIC DATA PROCESSING IN COM 053015103 188,108 -1,333 -0.70 46,978 6.44 0.0677
2024-01-30 2023-12-31 13F AUTOMATIC DATA PROCESSING IN COM 053015103 189,441 -46,844 -19.83 44,134 -22.31 0.0666
2023-10-25 2023-09-30 13F AUTOMATIC DATA PROCESSING IN COM 053015103 236,285 -25,450 -9.72 56,808 -0.77 0.0955
2023-08-03 2023-06-30 13F AUTOMATIC DATA PROCESSING IN COM 053015103 261,735 119,548 84.08 57,249 80.85 0.0868
2023-04-24 2023-03-31 13F AUTOMATIC DATA PROCESSING IN COM 053015103 142,187 -21,006 -12.87 31,655 -18.79 0.0489
2023-02-14 2022-12-31 13F AUTOMATIC DATA PROCESSING IN COM 053015103 163,193 27,506 20.27 38,980 27.01 0.0651
2022-10-07 2022-09-30 13F Automatic Data Processing Common Stock 053015103 135,687 3,155 2.38 30,691 10.25 0.0528
2022-08-10 2022-06-30 13F AUTOMATIC DATA PROCESSING IN COM 053015103 132,532 -1,349,160 -91.06 27,837 -91.74 0.0446
2022-05-13 2022-03-31 13F AUTOMATIC DATA PROCESSING IN COM 053015103 1,481,692 -49,849 -3.25 337,144 -10.73 0.4520
2022-02-14 2021-12-31 13F AUTOMATIC DATA PROCESSING IN COM 053015103 1,531,541 1,428,484 1,386.11 377,647 1,732.97 0.5088
2021-11-08 2021-09-30 13F AUTOMATIC DATA PROCESSING IN COM 053015103 103,057 -38,778 -27.34 20,603 -26.86 0.0292
2021-08-11 2021-06-30 13F AUTOMATIC DATA PROCESSING IN COM 053015103 141,835 -275,366 -66.00 28,171 -64.17 0.0392
2021-05-14 2021-03-31 13F AUTOMATIC DATA PROCESSING IN COM 053015103 417,201 10,976 2.70 78,630 9.85 0.1198
2021-02-10 2020-12-31 13F AUTOMATIC DATA PROCESSING IN COM 053015103 406,225 -923 -0.23 71,577 26.03 0.1546
2020-11-13 2020-09-30 13F AUTOMATIC DATA PROCESSING IN COM 053015103 407,148 -77,042 -15.91 56,793 -21.22 0.1411
2020-08-13 2020-06-30 13F AUTOMATIC DATA PROCESSING IN COM 053015103 484,190 -1,753,837 -78.37 72,091 -76.43 0.1929
2020-05-14 2020-03-31 13F AUTOMATIC DATA PROCESSING IN COM 053015103 2,238,027 608,417 37.34 305,894 10.09 0.9836
2020-02-13 2019-12-31 13F AUTOMATIC DATA PROCESSING IN COM 053015103 1,629,610 1,580,129 3,193.41 277,849 3,378.77 0.6834
2019-11-14 2019-09-30 13F AUTOMATIC DATA PROCESSING IN COM 053015103 49,481 10 0.02 7,987 -2.35 0.0210
2019-08-23 2019-06-30 13F/A-1 AUTOMATIC DATA PROCESSING IN COM 053015103 49,471 -3 -0.01 8,179 3.49 0.0211
2019-08-14 2019-06-30 13F AUTOMATIC DATA PROCESSING IN COM 053015103 49,471 -3 8,179
2019-05-15 2019-03-31 13F AUTOMATIC DATA PROCESSING IN COM 053015103 49,474 2,712 5.80 7,903 28.90 0.0191
2019-02-06 2018-12-31 13F AUTOMATIC DATA PROCESSING IN COM 053015103 46,762 13,985 42.67 6,131 24.16 0.0161
2018-11-15 2018-09-30 13F AUTOMATIC DATA PROCESSING IN COM 053015103 32,777 21,297 185.51 4,938 220.65 0.0120
2018-08-13 2018-06-30 13F AUTOMATIC DATA PROCESSING IN COM 053015103 11,480 1,559 15.71 1,540 36.77 0.0039
2018-05-14 2018-03-31 13F/A-1 AUTOMATIC DATA PROCESSING IN COM 053015103 9,921 5,999 152.96 1,126 144.78 0.0029
2018-05-14 2018-03-31 13F AUTOMATIC DATA PROCESSING IN COM 053015103 9,921 1,126
2018-02-13 2017-12-31 13F AUTOMATIC DATA PROCESSING IN COM 053015103 3,922 3,922 460 0.0011
2017-11-13 2017-09-30 13F AUTOMATIC DATA PROCESSING IN COM 053015103 0 -411,660 -100.00 0 -100.00
2017-08-14 2017-06-30 13F AUTOMATIC DATA PROCESSING IN COM 053015103 411,660 -109,928 -21.08 42,179 -21.02 0.2348
2017-05-25 2017-03-31 13F/A-1 AUTOMATIC DATA PROCESSING IN COM 053015103 521,588 521,588 53,405 0.3123
2017-05-12 2017-03-31 13F AUTOMATIC DATA PROCESSING IN COM 053015103 521,588 53,405
2016-11-15 2016-09-30 13F AUTOMATIC DATA PROCESSING IN COM 053015103 0 -17,822 -100.00 0 -100.00
2016-08-12 2016-06-30 13F AUTOMATIC DATA PROCESSING IN COM 053015103 17,822 641 3.73 1,637 6.23 0.0092
2016-05-12 2016-03-31 13F AUTOMATIC DATA PROCESSING IN COM 053015103 17,181 -10,094 -37.01 1,541 -33.32 0.0140
2016-02-12 2015-12-31 13F AUTOMATIC DATA PROCESSING IN COM 053015103 27,275 1,662 6.49 2,311 12.29 0.0143
2015-11-13 2015-09-30 13F AUTOMATIC DATA PROCESSING IN COM 053015103 25,613 5,317 26.20 2,058 26.41 0.0125
2015-08-13 2015-06-30 13F AUTOMATIC DATA PROCESSING IN COM 053015103 20,296 1,037 5.38 1,628 -1.27 0.0088
2015-05-13 2015-03-31 13F AUTOMATIC DATA PROCESSING IN COM 053015103 19,259 4,436 29.93 1,649 33.41 0.0087
2015-02-11 2014-12-31 13F AUTOMATIC DATA PROCESSING IN COM 053015103 14,823 2,211 17.53 1,236 17.94 0.0063
2014-11-12 2014-09-30 13F AUTOMATIC DATA PROCESSING IN COM 053015103 12,612 -4 -0.03 1,048 4.80 0.0053
2014-08-11 2014-06-30 13F AUTOMATIC DATA PROCESSING IN COM 053015103 12,616 2,358 22.99 1,000 26.10 0.0047
2014-05-14 2014-03-31 13F AUTOMATIC DATA PROCESSING IN COM 053015103 10,258 884 9.43 793 4.76 0.0039
2014-02-11 2013-12-31 13F/A-1 AUTOMATIC DATA PROCESSING IN COM 053015103 9,374 748 8.67 757 21.31 0.0038
2014-02-03 2013-12-31 13F AUTOMATIC DATA PROCESSING IN COM 053015103 9,374 757
2013-11-12 2013-09-30 13F AUTOMATIC DATA PROCESSING IN COM 053015103 8,626 479 5.88 624 11.23 0.0032
2013-08-20 2013-06-30 13F/A-1 AUTOMATIC DATA PROCESSING IN COM 053015103 8,147 8,147 561 0.0027
2013-08-09 2013-06-30 13F AUTOMATIC DATA PROCESSING IN COM 053015103 8,147 561 0.0027
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.