Automatic Data Processing, Inc.
US ˙ NasdaqGS ˙ US0530151036

SecurityADP / Automatic Data Processing, Inc.
InstitutionConning Inc.
Latest Disclosed Ownership164,051 shares
Latest Disclosed Value $ 33,331,885
Conning Inc. reports 28.75% increase in ownership of ADP / Automatic Data Processing, Inc.

On April 30, 2026 - Conning Inc. filed a 13F-HR form disclosing ownership of 164,051 shares of Automatic Data Processing, Inc. (US:ADP) valued at $33,331,882 USD as of March 31, 2026. The entity filed a previous 13F-HR on February 5, 2026 disclosing 127,421 shares of Automatic Data Processing, Inc.. This represents a change in shares of 28.75% during the quarter. The current value of the position is $37,362,615 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)
2026-04-30 2026-03-31 13F AUTOMATIC DATA PROCESSING IN COM 053015103 164,051 36,630 28.75 33,332 1.69 1.1078
2026-02-05 2025-12-31 13F AUTOMATIC DATA PROCESSING IN COM 053015103 127,421 14,892 13.23 32,777 -0.76 1.0975
2025-10-28 2025-09-30 13F AUTOMATIC DATA PROCESSING IN COM 053015103 112,529 5,702 5.34 33,027 0.25 1.0980
2025-07-24 2025-06-30 13F AUTOMATIC DATA PROCESSING IN COM 053015103 106,827 -7,661 -6.69 32,945 -5.81 1.1316
2025-04-29 2025-03-31 13F AUTOMATIC DATA PROCESSING IN COM 053015103 114,488 -11,082 -8.83 34,980 -4.84 1.2237
2025-01-28 2024-12-31 13F AUTOMATIC DATA PROCESSING IN COM 053015103 125,570 -13,664 -9.81 36,758 -4.60 1.2880
2024-10-29 2024-09-30 13F AUTOMATIC DATA PROCESSING IN COM 053015103 139,234 -8,368 -5.67 38,530 9.53 1.2726
2024-07-26 2024-06-30 13F AUTOMATIC DATA PROCESSING IN COM 053015103 147,602 -9,224 -5.88 35,176 -10.01 1.2666
2024-04-26 2024-03-31 13F AUTOMATIC DATA PROCESSING IN COM 053015103 156,826 11,530 7.94 39,091 15.71 1.2812
2024-01-30 2023-12-31 13F AUTOMATIC DATA PROCESSING IN COM 053015103 145,296 2,542 1.78 33,783 -1.48 1.1756
2023-10-26 2023-09-30 13F AUTOMATIC DATA PROCESSING IN COM 053015103 142,754 -23,897 -14.34 34,290 -6.21 1.2499
2023-07-21 2023-06-30 13F AUTOMATIC DATA PROCESSING IN COM 053015103 166,651 -1,541 -0.92 36,560 -2.20 1.2230
2023-04-27 2023-03-31 13F AUTOMATIC DATA PROCESSING IN COM 053015103 168,192 25,683 18.02 37,383 9.99 1.2499
2023-02-08 2022-12-31 13F AUTOMATIC DATA PROCESSING IN COM 053015103 142,509 -9,209 -6.07 33,990 -0.87 1.1049
2022-10-31 2022-09-30 13F AUTOMATIC DATA PROCESSING IN COM 053015103 151,718 -50,370 -24.92 34,287 -19.11 1.2171
2022-07-20 2022-06-30 13F AUTOMATIC DATA PROCESSING IN COM 053015103 202,088 -16,743 -7.65 42,389 -14.81 1.2704
2022-05-02 2022-03-31 13F AUTOMATIC DATA PROCESSING IN COM 053015103 218,831 7,046 3.33 49,761 -4.65 1.3549
2022-01-27 2021-12-31 13F AUTOMATIC DATA PROCESSING IN COM 053015103 211,785 -34,179 -13.90 52,186 6.20 1.3914
2021-11-05 2021-09-30 13F AUTOMATIC DATA PROCESSING IN COM 053015103 245,964 -5,651 -2.25 49,138 -1.60 1.4107
2021-07-29 2021-06-30 13F AUTOMATIC DATA PROCESSING IN COM 053015103 251,615 -24,845 -8.99 49,935 -4.16 1.4471
2021-04-23 2021-03-31 13F AUTOMATIC DATA PROCESSING IN COM 053015103 276,460 270,080 4,233.23 52,104 4,535.59 1.5674
2021-01-28 2020-12-31 13F AUTOMATIC DATA PROCESSING IN COM 053015103 6,380 -379 -5.61 1,124 19.19 0.0357
2020-10-21 2020-09-30 13F AUTOMATIC DATA PROCESSING IN COM 053015103 6,759 60 0.90 943 -5.42 0.0332
2020-08-07 2020-06-30 13F AUTOMATIC DATA PROCESSING IN COM 053015103 6,699 -301 -4.30 997 4.18 0.0370
2020-04-29 2020-03-31 13F AUTOMATIC DATA PROCESSING IN COM 053015103 7,000 -64 -0.91 957 -20.51 0.0407
2020-01-29 2019-12-31 13F AUTOMATIC DATA PROCESSING IN COM 053015103 7,064 -360 -4.85 1,204 0.50 0.0395
2019-10-30 2019-09-30 13F AUTOMATIC DATA PROCESSING IN COM 053015103 7,424 -149 -1.97 1,198 -4.31 0.0415
2019-07-25 2019-06-30 13F AUTOMATIC DATA PROCESSING IN COM 053015103 7,573 -10,509 -58.12 1,252 -56.65 0.0414
2019-04-22 2019-03-31 13F AUTOMATIC DATA PROCESSING IN COM 053015103 18,082 -241,301 -93.03 2,888 -91.51 0.0903
2019-01-29 2018-12-31 13F AUTOMATIC DATA PROCESSING IN COM 053015103 259,383 -7,552 -2.83 34,010 -15.43 1.1568
2018-10-26 2018-09-30 13F AUTOMATIC DATA PROCESSING IN COM 053015103 266,935 -28,276 -9.58 40,216 1.56 1.1927
2018-07-25 2018-06-30 13F AUTOMATIC DATA PROCESSING IN COM 053015103 295,211 1,981 0.68 39,600 19.00 1.2075
2018-05-03 2018-03-31 13F AUTOMATIC DATA PROCESSING IN COM 053015103 293,230 42,571 16.98 33,276 13.28 1.0712
2018-01-30 2017-12-31 13F AUTOMATIC DATA PROCESSING IN COM 053015103 250,659 -9,686 -3.72 29,375 3.21 0.9696
2017-10-20 2017-09-30 13F AUTOMATIC DATA PROCESSING IN COM 053015103 260,345 -13,533 -4.94 28,461 1.42 0.9687
2017-08-03 2017-06-30 13F AUTOMATIC DATA PROCESSING IN COM 053015103 273,878 19,194 7.54 28,062 7.61 1.0188
2017-04-27 2017-03-31 13F AUTOMATIC DATA PROCESSING IN COM 053015103 254,684 4,701 1.88 26,077 1.49 0.9626
2017-02-02 2016-12-31 13F AUTOMATIC DATA PROCESSING IN COM 053015103 249,983 -8,487 -3.28 25,693 12.70 1.0246
2016-10-25 2016-09-30 13F AUTOMATIC DATA PROCESSING IN COM 053015103 258,470 9,141 3.67 22,797 -0.48 0.9086
2016-07-26 2016-06-30 13F AUTOMATIC DATA PROCESSING IN COM 053015103 249,329 -1,659 -0.66 22,906 1.73 0.9458
2016-04-26 2016-03-31 13F AUTOMATIC DATA PROCESSING IN COM 053015103 250,988 409 0.16 22,516 6.06 0.9451
2016-02-04 2015-12-31 13F AUTOMATIC DATA PROCESSING IN COM 053015103 250,579 -38,651 -13.36 21,229 -8.66 0.9078
2015-10-23 2015-09-30 13F AUTOMATIC DATA PROCESSING IN COM 053015103 289,230 21,455 8.01 23,243 8.19 1.0210
2015-08-03 2015-06-30 13F AUTOMATIC DATA PROCESSING IN COM 053015103 267,775 -10,813 -3.88 21,484 -9.95 0.8816
2015-04-24 2015-03-31 13F AUTOMATIC DATA PROCESSING IN COM 053015103 278,588 38,690 16.13 23,858 19.29 1.0142
2015-02-13 2014-12-31 13F AUTOMATIC DATA PROCESSING IN COM 053015103 239,898 9,196 3.99 20,000 4.35 0.9763
2014-11-07 2014-09-30 13F AUTOMATIC DATA PROCESSING IN COM 053015103 230,702 1,932 0.84 19,167 5.68 1.0042
2014-07-25 2014-06-30 13F AUTOMATIC DATA PROCESSING IN COM 053015103 228,770 11,718 5.40 18,137 8.16 0.9639
2014-04-25 2014-03-31 13F AUTOMATIC DATA PROCESSING IN COM 053015103 217,052 13,575 6.67 16,769 1.98 0.9846
2014-02-04 2013-12-31 13F AUTOMATIC DATA PROCESSING IN COM 053015103 203,477 37,934 22.91 16,443 37.23 1.0189
2013-11-04 2013-09-30 13F AUTOMATIC DATA PROCESSING IN COM 053015103 165,543 -3,859 -2.28 11,982 2.72 0.9251
2013-08-13 2013-06-30 13F AUTOMATIC DATA PROCESSING IN COM 053015103 169,402 169,402 11,665 0.9637
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.