Automatic Data Processing, Inc.
US ˙ NasdaqGS ˙ US0530151036

SecurityADP / Automatic Data Processing, Inc.
InstitutionBarr E S & Co
Latest Disclosed Ownership1,277 shares
Latest Disclosed Value $ 259,461
Barr E S & Co ownership in ADP / Automatic Data Processing, Inc.

On May 13, 2026 - Barr E S & Co filed a 13F-HR form disclosing ownership of 1,277 shares of Automatic Data Processing, Inc. (US:ADP) valued at $259,461 USD as of March 31, 2026. The entity filed a previous 13F-HR on February 5, 2026 disclosing 1,277 shares of Automatic Data Processing, Inc.. This represents a change in shares of 0.00% during the quarter. The current value of the position is $295,383 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 PROCESS COM 053015103 1,277 0 0.00 259 -21.04 0.0151
2026-02-05 2025-12-31 13F AUTOMATIC DATA PROCESS COM 053015103 1,277 0 0.00 328 -12.30 0.0171
2025-11-12 2025-09-30 13F AUTOMATIC DATA PROCESS COM 053015103 1,277 0 0.00 375 -4.83 0.0203
2025-08-12 2025-06-30 13F AUTOMATIC DATA PROCESS COM 053015103 1,277 -100 -7.26 394 -6.43 0.0226
2025-05-15 2025-03-31 13F AUTOMATIC DATA PROCESS COM 053015103 1,377 0 0.00 421 4.22 0.0255
2025-02-13 2024-12-31 13F AUTOMATIC DATA PROCESS COM 053015103 1,377 0 0.00 403 5.77 0.0238
2024-11-14 2024-09-30 13F AUTOMATIC DATA PROCESS COM 053015103 1,377 61 4.64 381 21.34 0.0238
2024-08-14 2024-06-30 13F AUTOMATIC DATA PROCESS COM 053015103 1,316 0 0.00 314 -4.27 0.0206
2024-05-15 2024-03-31 13F AUTOMATIC DATA PROCESS COM 053015103 1,316 -275 -17.28 329 -11.35 0.0214
2024-02-09 2023-12-31 13F AUTOMATIC DATA PROCESS COM 053015103 1,591 85 5.64 371 2.21 0.0252
2023-11-14 2023-09-30 13F AUTOMATIC DATA PROCESS COM 053015103 1,506 -85 -5.34 362 3.72 0.0262
2023-08-10 2023-06-30 13F AUTOMATIC DATA PROCESS COM 053015103 1,591 0 0.00 350 -1.41 0.0264
2023-05-15 2023-03-31 13F AUTOMATIC DATA PROCESS COM 053015103 1,591 231 16.99 354 9.26 0.0293
2023-02-14 2022-12-31 13F AUTOMATIC DATA PROCESS COM 053015103 1,360 0 0.00 325 5.19 0.0270
2022-11-14 2022-09-30 13F AUTOMATIC DATA PROCESS COM 053015103 1,360 0 0.00 308 7.69 0.0273
2022-08-15 2022-06-30 13F AUTOMATIC DATA PROCESS COM 053015103 1,360 0 0.00 286 -7.44 0.0233
2022-05-16 2022-03-31 13F AUTOMATIC DATA PROCESS COM 053015103 1,360 0 0.00 309 -7.76 0.0211
2022-02-14 2021-12-31 13F AUTOMATIC DATA PROCESS COM 053015103 1,360 0 0.00 335 23.16 0.0223
2021-11-10 2021-09-30 13F AUTOMATIC DATA PROCESS COM 053015103 1,360 0 0.00 272 0.74 0.0196
2021-08-13 2021-06-30 13F AUTOMATIC DATA PROCESS COM 053015103 1,360 135 11.02 270 16.88 0.0195
2021-05-14 2021-03-31 13F AUTOMATIC DATA PROCESS COM 053015103 1,225 0 0.00 231 6.94 0.0181
2021-02-16 2020-12-31 13F AUTOMATIC DATA PROCESS COM 053015103 1,225 1,225 216 0.0188
2020-05-15 2020-03-31 13F AUTOMATIC DATA PROCESS COM 053015103 0 -1,325 -100.00 0 -100.00
2020-02-14 2019-12-31 13F AUTOMATIC DATA PROCESS COM 053015103 1,325 0 0.00 226 5.61 0.0218
2019-11-12 2019-09-30 13F AUTOMATIC DATA PROCESS COM 053015103 1,325 -250 -15.87 214 -17.69 0.0211
2019-08-08 2019-06-30 13F AUTOMATIC DATA PROCESS COM 053015103 1,575 0 0.00 260 3.17 0.0256
2019-05-15 2019-03-31 13F AUTOMATIC DATA PROCESS COM 053015103 1,575 -1,125 -41.67 252 -28.81 0.0261
2019-02-14 2018-12-31 13F AUTOMATIC DATA PROCESS COM 053015103 2,700 0 0.00 354 -13.02 0.0395
2018-11-07 2018-09-30 13F AUTOMATIC DATA PROCESS COM 053015103 2,700 0 0.00 407 12.43 0.0400
2018-08-10 2018-06-30 13F AUTOMATIC DATA PROCESS COM 053015103 2,700 -37 -1.35 362 16.40 0.0374
2018-05-15 2018-03-31 13F AUTOMATIC DATA PROCESS COM 053015103 2,737 0 0.00 311 -3.12 0.0326
2018-02-14 2017-12-31 13F AUTOMATIC DATA PROCESS COM 053015103 2,737 537 24.41 321 33.20 0.0326
2017-11-09 2017-09-30 13F AUTOMATIC DATA PROCESS COM 053015103 2,200 0 0.00 241 7.11 0.0257
2017-08-14 2017-06-30 13F AUTOMATIC DATA PROCESS COM 053015103 2,200 100 4.76 225 4.65 0.0250
2017-05-15 2017-03-31 13F AUTOMATIC DATA PROCESS COM 053015103 2,100 -500 -19.23 215 -19.48 0.0245
2017-02-14 2016-12-31 13F AUTOMATIC DATA PROCESS COM 053015103 2,600 0 0.00 267 16.59 0.0314
2016-11-10 2016-09-30 13F AUTOMATIC DATA PROCESS COM 053015103 2,600 0 0.00 229 -4.18 0.0282
2016-08-12 2016-06-30 13F AUTOMATIC DATA PROCESS COM 053015103 2,600 -334 -11.38 239 -9.13 0.0289
2016-05-13 2016-03-31 13F AUTOMATIC DATA PROCESS COM 053015103 2,934 -400 -12.00 263 -6.74 0.0317
2016-02-12 2015-12-31 13F AUTOMATIC DATA PROCESS COM 053015103 3,334 0 0.00 282 5.22 0.0344
2015-11-13 2015-09-30 13F AUTOMATIC DATA PROCESS COM 053015103 3,334 -343 -9.33 268 -9.15 0.0342
2015-08-14 2015-06-30 13F AUTOMATIC DATA PROCESS COM 053015103 3,677 0 0.00 295 -6.35 0.0353
2015-05-14 2015-03-31 13F AUTOMATIC DATA PROCESS COM 053015103 3,677 3,677 315 0.0370
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.