Merck & Co., Inc.
BG ˙ BUL ˙ US58933Y1055
SecurityBG:6MK / Merck & Co., Inc.
InstitutionQuilter Plc
Latest Disclosed Ownership1,186,720 shares
Latest Disclosed Value $ 142,750,549
Quilter Plc reports 0.39% decrease in ownership of 6MK / Merck & Co., Inc.

On May 13, 2026 - Quilter Plc filed a 13F-HR form disclosing ownership of 1,186,720 shares of Merck & Co., Inc. (BG:6MK) valued at $142,750,549 USD as of March 31, 2026. The entity filed a previous 13F-HR on January 21, 2026 disclosing 1,191,309 shares of Merck & Co., Inc.. This represents a change in shares of -0.39% during the quarter.

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 MERCK COM 58933Y105 1,186,720 -4,589 -0.39 142,751 13.84 1.2672
2026-01-21 2025-12-31 13F MERCK COM 58933Y105 1,191,309 8,471 0.72 125,397 26.31 2.1055
2025-10-31 2025-09-30 13F MERCK COM 58933Y105 1,182,838 3,355 0.28 99,276 6.33 1.7049
2025-08-12 2025-06-30 13F MERCK COM 58933Y105 1,179,483 -1,314 -0.11 93,368 -11.91 1.7045
2025-04-24 2025-03-31 13F MERCK COM 58933Y105 1,180,797 62,933 5.63 105,988 -4.69 2.2011
2025-01-29 2024-12-31 13F MERCK COM 58933Y105 1,117,864 127,926 12.92 111,205 -1.08 2.1968
2024-11-12 2024-09-30 13F MERCK COM 58933Y105 989,938 79,295 8.71 112,417 -0.28 2.2938
2024-08-09 2024-06-30 13F MERCK COM 58933Y105 910,643 35,866 4.10 112,738 -2.33 2.5287
2024-05-15 2024-03-31 13F MERCK COM 58933Y105 874,777 -2,101 -0.24 115,427 20.77 2.7296
2024-02-14 2023-12-31 13F/A-1 MERCK COM 58933Y105 876,878 30,923 3.66 95,580 -88.68 3.2286
2024-01-24 2023-12-31 13F MERCK COM 58933Y105 876,878 30,923 871,792 2.7332
2023-11-01 2023-09-30 13F MERCK COM 58933Y105 845,955 41,820 5.20 844,094 5.78 3.3296
2023-07-19 2023-06-30 13F MERCK COM 58933Y105 804,135 -18,729 -2.28 797,935 -2.35 3.0989
2023-05-16 2023-03-31 13F MERCK COM 58933Y105 822,864 -39,906 -4.63 817,104 753.60 3.1366
2023-02-08 2022-12-31 13F MERCK COM 58933Y105 862,770 -17,897 -2.03 95,724 26.21 3.1498
2022-11-02 2022-09-30 13F MERCK COM 58933Y105 880,667 33,579 3.96 75,843 -1.79 2.7210
2022-08-04 2022-06-30 13F MERCK COM 58933Y105 847,088 110,860 15.06 77,229 27.85 2.6128
2022-05-20 2022-03-31 13F MERCK COM 58933Y105 736,228 67,978 10.17 60,408 17.60 1.6419
2022-02-14 2021-12-31 13F MERCK COM 58933Y105 668,250 135,079 25.34 51,369 28.27 1.3380
2021-11-04 2021-09-30 13F MERCK COM 58933Y105 533,171 21,410 4.18 40,046 0.62 1.1171
2021-08-12 2021-06-30 13F MERCK COM 58933Y105 511,761 38,055 8.03 39,801 8.99 1.1446
2021-05-14 2021-03-31 13F/A-1 MERCK & CO. COM 58933Y105 473,706 3,862 0.82 36,518 -4.99 1.1549
2021-05-12 2021-03-31 13F MERCK & CO. COM 58933Y105 473,706 3,862 36,518 0.5332
2021-02-12 2020-12-31 13F MERCK & CO. COM 58933Y105 469,844 14,465 3.18 38,434 1.75 1.3167
2020-11-12 2020-09-30 13F MERCK & CO. COM 58933Y105 455,379 30,267 7.12 37,774 14.91 1.4957
2020-08-12 2020-06-30 13F MERCK & CO. COM 58933Y105 425,112 59,181 16.17 32,874 16.76 1.6104
2020-05-08 2020-03-31 13F MERCK & CO. COM 58933Y105 365,931 42,855 13.26 28,155 -4.18 1.8626
2020-02-13 2019-12-31 13F MERCK COM 58933Y105 323,076 323,076 29,383 1.7247
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.