Merck & Co., Inc.

WELLINGTON MANAGEMENT GROUP LLP MRK

Report date

12/31/2025

Quarter

2025 Q4

Filed

2/17/2026

Shares

86,435,458

Value ($000)

9,098,196

Weight

1.6%

2013 Q4 - 2025 Q4 (27 filings)

Shares History

History scope: non-option holdings only (PUT/CALL rows excluded).

All 13F Holders	Filing date	Value ($000s)	% of Holdings	Shares	Reporting period
2025 Q4	2/17/2026	9,098,196	1.6%	86,435,458	12/31/2025
2025 Q3	11/14/2025	6,318,175	1.1%	75,279,104	9/30/2025
2025 Q2	8/14/2025	6,083,960	1.1%	76,856,492	6/30/2025
2025 Q1	5/13/2025	7,330,668	1.4%	81,669,651	3/31/2025
2024 Q4	2/12/2025	8,032,217	1.5%	80,742,030	12/31/2024
2024 Q3	11/14/2024	8,608,914	1.5%	75,809,383	9/30/2024
2024 Q2	8/14/2024	8,973,269	1.6%	72,481,979	6/30/2024
2024 Q1	5/15/2024	11,393,653	2.0%	86,348,259	3/31/2024
2023 Q4	2/12/2024	9,331,676	1.7%	85,595,999	12/31/2023
2023 Q3	11/14/2023	8,487,472	1.7%	82,442,666	9/30/2023
2023 Q2	8/14/2023	8,913,387	1.7%	77,245,752	6/30/2023
2023 Q1	5/12/2023	7,294,504	1.4%	68,563,817	3/31/2023
2022 Q4	2/13/2023	6,880,772	1.4%	62,016,871	12/31/2022
2022 Q3	11/14/2022	3,458,335	0.7%	40,157,172	9/30/2022
2022 Q2	8/15/2022	3,712,755	0.7%	40,723,427	6/30/2022
2022 Q1	5/16/2022	3,749,759	0.6%	45,700,904	3/31/2022
2021 Q4	2/11/2022	3,822,290	0.6%	49,873,308	12/31/2021
2021 Q3	11/15/2021	3,722,381	0.6%	49,559,078	9/30/2021
2021 Q2	8/16/2021	3,764,600	0.6%	48,406,837	6/30/2021
2021 Q1	5/17/2021	3,052,502	0.5%	39,596,585	3/31/2021
2020 Q4	2/12/2021	3,326,149	0.6%	40,661,969	12/31/2020
2020 Q3	11/16/2020	3,710,301	0.8%	44,729,366	9/30/2020
2020 Q2	8/14/2020	3,273,799	0.7%	42,335,445	6/30/2020
2020 Q1	5/14/2020	3,682,921	1.0%	47,867,455	3/31/2020
2019 Q4	2/11/2020	5,153,309	1.1%	56,660,903	12/31/2019
2014 Q1	5/15/2014	8,917,591	2.5%	157,082,791	3/31/2014
2013 Q4	2/14/2014	7,708,516	2.2%	154,016,283	12/31/2013