Main Street Research’s Automatic Data Processing ADP Stock Holding History

Main Street Research’s Portfolio ADP Stock Details ADP Fund Activity

Bought

Maintained

Sold

Quarter	Market Value	Status	Shares	Change in Stake	Trade Value	Portfolio Weight	Portfolio Position
2026 Q2	$469K	Sell	2,092 -140	-6%	-$29.9K	0.02%	93
2026 Q1	$453K	Sell	2,232 -77	-3%	-$17.7K	0.03%	89
2025 Q4	$598K	Sell	2,309 -169	-7%	-$45K	0.03%	69
2025 Q3	$727K	Hold	2,478	–	–	0.04%	66
2025 Q2	$768K	Sell	2,478 -230	-8%	-$70.6K	0.05%	56
2025 Q1	$832K	Sell	2,708 -719	-21%	-$217K	0.05%	61
2024 Q4	$1.01M	Buy	3,427 +255	+8%	+$75.4K	0.06%	58
2024 Q3	$882K	Hold	3,172	–	–	0.06%	62
2024 Q2	$762K	Sell	3,172 -100	-3%	-$24.6K	0.05%	57
2024 Q1	$822K	Sell	3,272 -124	-4%	-$30.3K	0.06%	57
2023 Q4	$796K	Sell	3,396 -184	-5%	-$42.9K	0.06%	56
2023 Q3	$866K	Sell	3,580 -212	-6%	-$51.7K	0.09%	55
2023 Q2	$838K	Buy	3,792 +257	+7%	+$55.4K	0.13%	47
2023 Q1	$791K	Buy	3,535 +200	+6%	+$45.1K	0.16%	43
2022 Q4	$801K	Hold	3,335	–	–	0.2%	45
2022 Q3	$754K	Hold	3,335	–	–	0.17%	44
2022 Q2	$700K	Sell	3,335 -50	-1%	-$11K	0.18%	38
2022 Q1	$770K	Hold	3,385	–	–	0.07%	55
2021 Q4	$835K	Buy	3,385 +25	+0.7%	+$5.66K	0.06%	66
2021 Q3	$672K	Sell	3,360 -110	-3%	-$22.7K	0.06%	71
2021 Q2	$689K	Buy	3,470 +110	+3%	+$21.4K	0.06%	77
2021 Q1	$633K	Sell	3,360 -184	-5%	-$31.9K	0.06%	76
2020 Q4	$624K	Sell	3,544 -46	-1%	-$7.55K	0.07%	73
2020 Q3	$501K	Sell	3,590 -171	-5%	-$24K	0.06%	74
2020 Q2	$560K	Hold	3,761	–	–	0.09%	61
2020 Q1	$514K	Sell	3,761 -55	-1%	-$8.86K	0.13%	49
2019 Q4	$651K	Hold	3,816	–	–	0.1%	59
2019 Q3	$616K	Sell	3,816 -24	-0.6%	-$3.96K	0.12%	54
2019 Q2	$635K	Hold	3,840	–	–	0.14%	51
2019 Q1	$613K	Sell	3,840 -233	-6%	-$33.8K	0.19%	43
2018 Q4	$534K	Sell	4,073 -2,600	-39%	-$367K	0.21%	39
2018 Q3	$1M	Buy	6,673 +250	+4%	+$35.4K	0.14%	51
2018 Q2	$862K	Buy	6,423 +950	+17%	+$120K	0.14%	52
2018 Q1	$621K	Sell	5,473 -357	-6%	-$41.6K	0.1%	59
2017 Q4	$683K	Sell	5,830 -222	-4%	-$25.4K	0.1%	63
2017 Q3	$662K	Sell	6,052 -98	-2%	-$10.5K	0.11%	64
2017 Q2	$630K	Buy	6,150 +679	+12%	+$68.7K	0.1%	76
2017 Q1	$560K	Sell	5,471 -271	-5%	-$27.6K	0.1%	77
2016 Q4	$590K	Sell	5,742 -160	-3%	-$14.9K	0.11%	74
2016 Q3	$521K	Sell	5,902 -450	-7%	-$40.8K	0.1%	78
2016 Q2	$584K	Sell	6,352 -600	-9%	-$53K	0.12%	73
2016 Q1	$624K	Sell	6,952 -680	-9%	-$57K	0.16%	63
2015 Q4	$647K	Sell	7,632 -200	-3%	-$17.2K	0.14%	76
2015 Q3	$681K	Sell	7,832 -315	-4%	-$25.2K	0.16%	77
2015 Q2	$654K	Buy	8,147 +285	+4%	+$24.3K	0.13%	89
2015 Q1	$673K	Sell	7,862 -325	-4%	-$28K	0.14%	86
2014 Q4	$683K	Sell	8,187 -796	-9%	-$64.5K	0.15%	88
2014 Q3	$655K	Hold	8,983	–	–	0.15%	95
2014 Q2	$625K	Buy	8,983 +25	+0.3%	+$1.71K	0.15%	91
2014 Q1	$608K	Sell	8,958 -313	-3%	-$21.3K	0.15%	92
2013 Q4	$658K	Hold	9,271	–	–	0.16%	92
2013 Q3	$589K	Sell	9,271 -456	-5%	-$29K	0.16%	92
2013 Q2	$588K	Buy	+9,727	New	+$580K	0.18%	91

Other funds holding ADP

Ninety One (UK) London, United Kingdom $44.7B AUM 17.24% 1-Year Est. Return

Sumitomo Mitsui Trust Group Minato-Ku, Tokyo, Japan $175B AUM 40.63% 1-Year Est. Return

Robeco Institutional Asset Management Rotterdam, Netherlands $81.4B AUM 40.71% 1-Year Est. Return

LPPI

Local Pensions Partnership Investment London, United Kingdom $4.77B AUM 20.5% 1-Year Est. Return

Mirae Asset Global Investments Seoul, South Korea $67.7B AUM 51.91% 1-Year Est. Return

LWCFA

Loring Wolcott & Coolidge Fiduciary Advisors Boston, Massachusetts $10.3B AUM 3.26% 1-Year Est. Return

Vest Financial Mclean, Virginia $9.52B AUM 31.6% 1-Year Est. Return

SLAM

Swiss Life Asset Management Zurich $24.1B AUM 38.82% 1-Year Est. Return

New York State Common Retirement Fund Albany, New York $79.3B AUM 43.63% 1-Year Est. Return

BTW

Boston Trust Walden Boston, Massachusetts $13.1B AUM 24.63% 1-Year Est. Return

Main Street Research's ADP Position: Q2 2026 in Review

Main Street Research reduced its Automatic Data Processing (ADP) stake by 6.3% in Q2 2026, selling an estimated $29.9K and leaving 2,092 shares worth $469K. The position accounts for 0.02% of the portfolio, ranked #93.

Main Street Research first reported a position in ADP in Q2 2013 and has held it in 53 quarters since. The position peaked at $1.01M in Q4 2024. 994 funds tracked by Wall St. Rank hold ADP as of Q2 2026.

Main Street Research held 2,092 shares of Automatic Data Processing worth $469K as of Q2 2026.
Main Street Research sold 140 Automatic Data Processing shares in Q2 2026, an estimated $29.9K.
Automatic Data Processing made up 0.02% of Main Street Research's portfolio in Q2 2026, its #93 holding.
Main Street Research first reported a position in Automatic Data Processing in Q2 2013 and has held it in 53 quarters since.
Main Street Research's Automatic Data Processing position peaked at $1.01M in Q4 2024.
994 funds tracked by Wall St. Rank held Automatic Data Processing as of Q2 2026.

Based on Main Street Research's 13F filing for Q2 2026, filed 29 Jul 2026.