Merck & Co., Inc.

MASSACHUSETTS FINANCIAL SERVICES CO /MA/ MRK

Report date

12/31/2025

Quarter

2025 Q4

Filed

1/22/2026

Shares

4,416,021

Value ($000)

464,830

Weight

0.1%

2013 Q4 - 2025 Q4 (28 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	1/22/2026	464,830	0.1%	4,416,021	12/31/2025
2025 Q3	10/29/2025	633,589	0.2%	7,549,020	9/30/2025
2025 Q2	8/8/2025	607,938	0.2%	7,679,866	6/30/2025
2025 Q1	5/2/2025	716,571	0.2%	7,983,193	3/31/2025
2024 Q4	2/12/2025	815,506	0.3%	8,197,687	12/31/2024
2024 Q3	11/12/2024	975,966	0.3%	8,594,276	9/30/2024
2024 Q2	8/9/2024	1,197,396	0.4%	9,672,022	6/30/2024
2024 Q1	5/14/2024	1,436,333	0.4%	10,885,435	3/31/2024
2023 Q4	2/8/2024	1,245,798	0.4%	11,427,241	12/31/2023
2023 Q3	11/8/2023	1,245,891	0.4%	12,101,901	9/30/2023
2023 Q2	8/9/2023	2,325,758	0.8%	20,155,630	6/30/2023
2023 Q1	5/10/2023	2,408,537	0.8%	22,638,753	3/31/2023
2022 Q4	2/13/2023	2,649,734	0.9%	23,882,232	12/31/2022
2022 Q3	11/9/2022	2,328,763	0.9%	27,040,907	9/30/2022
2022 Q2	8/9/2022	2,527,240	0.9%	27,720,086	6/30/2022
2022 Q1	5/11/2022	2,366,671	0.7%	28,844,244	3/31/2022
2021 Q4	2/10/2022	2,221,156	0.6%	28,981,674	12/31/2021
2021 Q3	11/10/2021	1,915,072	0.6%	25,496,888	9/30/2021
2021 Q2	8/13/2021	1,919,909	0.6%	24,686,997	6/30/2021
2021 Q1	5/13/2021	1,906,680	0.6%	24,733,151	3/31/2021
2020 Q4	5/12/2021	1,854,397	0.6%	22,669,896	12/31/2020
2020 Q3	11/12/2020	1,995,271	0.7%	24,053,883	9/30/2020
2020 Q2	11/20/2020	1,818,422	0.7%	23,515,092	6/30/2020
2020 Q1	11/20/2020	1,288,232	0.6%	16,743,333	3/31/2020
2019 Q4	11/25/2020	913,030	0.3%	10,038,795	12/31/2019
2019 Q3	11/20/2020	863,162	0.3%	10,253,759	9/30/2019
2014 Q1	5/13/2014	632,005	0.3%	11,132,722	3/31/2014
2013 Q4	2/12/2014	550,587	0.3%	11,000,744	12/31/2013