Merck & Co., Inc.
US ˙ NYSE ˙ US58933Y1055

SecurityMRK / Merck & Co., Inc.
InstitutionClarius Group, LLC
Latest Disclosed Ownership23,078 shares
Latest Disclosed Value $ 2,429,193
Clarius Group, LLC reports 9.13% decrease in ownership of MRK / Merck & Co., Inc.

On January 14, 2026 - Clarius Group, LLC filed a 13F-HR form disclosing ownership of 23,078 shares of Merck & Co., Inc. (US:MRK) valued at $2,429,190 USD as of December 31, 2025. The entity filed a previous 13F-HR on October 14, 2025 disclosing 25,398 shares of Merck & Co., Inc.. This represents a change in shares of -9.13% during the quarter. The current value of the position is $2,647,047 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)
2026-01-14 2025-12-31 13F MERCK COM 58933Y105 23,078 -2,320 -9.13 2,429 13.98 0.1387
2025-10-14 2025-09-30 13F MERCK COM 58933Y105 25,398 2,887 12.82 2,132 19.65 0.1262
2025-07-22 2025-06-30 13F MERCK COM 58933Y105 22,511 1,420 6.73 1,782 -5.92 0.1039
2025-04-18 2025-03-31 13F MERCK COM 58933Y105 21,091 -2,941 -12.24 1,893 -20.79 0.1189
2025-01-16 2024-12-31 13F MERCK COM 58933Y105 24,032 171 0.72 2,391 -12.33 0.1633
2024-10-09 2024-09-30 13F MERCK COM 58933Y105 23,861 -1,085 -4.35 2,727 -11.72 0.1913
2024-07-11 2024-06-30 13F MERCK COM 58933Y105 24,946 -827 -3.21 3,088 -9.18 0.2189
2024-04-17 2024-03-31 13F MERCK COM 58933Y105 25,773 -3,489 -11.92 3,401 6.58 0.2348
2024-01-29 2023-12-31 13F MERCK COM 58933Y105 29,262 7,608 35.13 3,190 43.11 0.2645
2023-10-19 2023-09-30 13F MERCK COM 58933Y105 21,654 -6,154 -22.13 2,229 -30.52 0.2125
2023-08-10 2023-06-30 13F MERCK COM 58933Y105 27,808 1,832 7.05 3,209 16.11 0.2480
2023-04-17 2023-03-31 13F MERCK COM 58933Y105 25,976 -81 -0.31 2,764 138,050.00 0.2347
2023-01-25 2022-12-31 13F MERCK COM 58933Y105 26,057 406 1.58 3 -99.91 0.2604
2022-10-24 2022-09-30 13F MERCK COM 58933Y105 25,651 1,956 8.25 2,209 2.27 0.2208
2022-08-10 2022-06-30 13F MERCK COM 58933Y105 23,695 2,707 12.90 2,160 34.24 0.2155
2022-04-08 2022-03-31 13F MERCK COM 58933Y105 20,988 0 0.00 1,609 0.00 0.1273
2022-02-02 2021-12-31 13F MERCK COM 58933Y105 20,988 768 3.80 1,609 5.92 0.1273
2021-10-18 2021-09-30 13F MERCK COM 58933Y105 20,220 -156 -0.77 1,519 -4.16 0.1361
2021-08-06 2021-06-30 13F MERCK COM 58933Y105 20,376 -128 -0.62 1,585 0.25 0.1423
2021-04-27 2021-03-31 13F MERCK & CO. COM 58933Y105 20,504 -2,633 -11.38 1,581 -16.48 0.1549
2021-01-15 2020-12-31 13F MERCK & CO. COM 58933Y105 23,137 1,330 6.10 1,893 4.64 0.2040
2020-10-09 2020-09-30 13F MERCK & CO. COM 58933Y105 21,807 -1,604 -6.85 1,809 -0.06 0.2324
2020-07-08 2020-06-30 13F MERCK & CO. COM 58933Y105 23,411 2,603 12.51 1,810 13.05 0.2536
2020-04-24 2020-03-31 13F MERCK & CO. COM 58933Y105 20,808 312 1.52 1,601 -14.66 0.3020
2020-01-22 2019-12-31 13F MERCK COM 58933Y105 20,496 -2,043 -9.06 1,876 -1.11 0.2971
2019-10-22 2019-09-30 13F MERCK COM 58933Y105 22,539 4,586 25.54 1,897 26.05 0.3480
2019-08-02 2019-06-30 13F MERCK COM 58933Y105 17,953 2,222 14.12 1,505 15.06 0.3027
2019-05-14 2019-03-31 13F MERCK COM 58933Y105 15,731 8,326 112.44 1,308 131.10 0.3182
2019-02-09 2018-12-31 13F MERCK COM 58933Y105 7,405 1,624 28.09 566 38.05 0.2056
2018-11-13 2018-09-30 13F MERCK COM 58933Y105 5,781 5,781 410 0.1452
2017-11-07 2017-09-30 13F MERCK COM 58933Y105 0 -5,940 -100.00 0 -100.00
2017-08-11 2017-06-30 13F MERCK COM 58933Y105 5,940 0 0.00 381 0.79 0.1570
2017-05-04 2017-03-31 13F MERCK COM 58933Y105 5,940 134 2.31 378 10.53 0.1561
2017-02-14 2016-12-31 13F/A-1 MERCK COM 58933Y105 5,806 41 0.71 342 -5.52 0.1447
2017-02-07 2016-12-31 13F MERCK COM 58933Y105 3,012 342
2016-11-14 2016-09-30 13F MERCK COM 58933Y105 5,765 -1,693 -22.70 362 -15.62 0.1688
2016-08-12 2016-06-30 13F MERCK COM 58933Y105 7,458 -600 -7.45 429 0.70 0.2287
2016-05-10 2016-03-31 13F MERCK COM 58933Y105 8,058 2,997 59.22 426 59.55 0.2362
2016-05-10 2015-12-31 13F/A-1 MERCK COM 58933Y105 5,061 5,061 267 0.1548
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.