Merck & Co., Inc.
MX ˙ BMV ˙ US58933Y1055
SecurityMX:MRK / Merck & Co., Inc.
InstitutionCheviot Value Management, LLC
Latest Disclosed Ownership171,470 shares
Latest Disclosed Value $ 20,626,103
Cheviot Value Management, LLC reports 1.02% increase in ownership of MRK / Merck & Co., Inc.

On May 12, 2026 - Cheviot Value Management, LLC filed a 13F-HR form disclosing ownership of 171,470 shares of Merck & Co., Inc. (MX:MRK) valued at $20,626,103 USD as of March 31, 2026. The entity filed a previous 13F-HR on February 3, 2026 disclosing 169,736 shares of Merck & Co., Inc.. This represents a change in shares of 1.02% 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)
2026-05-12 2026-03-31 13F MERCK & CO INC COM Stock 58933Y105 171,470 1,734 1.02 20,626 13.68 2.0718
2026-02-03 2025-12-31 13F MERCK & CO INC COM Stock 58933Y105 169,736 4,424 2.68 18,145 26.11 1.7822
2025-10-31 2025-09-30 13F MERCK & CO INC COM Stock 58933Y105 165,312 7,027 4.44 14,387 12.64 1.5302
2025-08-13 2025-06-30 13F MERCK & CO INC COM Stock 58933Y105 158,285 12,704 8.73 12,772 5.91 1.4642
2025-05-09 2025-03-31 13F MERCK & CO INC COM Stock 58933Y105 145,581 26,575 22.33 12,060 1.87 1.4833
2025-02-14 2024-12-31 13F Merck COM 58933Y105 119,006 10,750 9.93 11,839 -3.70 2.2636
2024-11-14 2024-09-30 13F Merck COM 58933Y105 108,256 -5,185 -4.57 12,294 -12.47 2.3190
2024-08-14 2024-06-30 13F Merck COM 58933Y105 113,441 -1,666 -1.45 14,044 -7.53 2.7432
2024-05-14 2024-03-31 13F Merck COM 58933Y105 115,107 -642 -0.55 15,188 19.45 3.3292
2024-02-14 2023-12-31 13F Merck COM 58933Y105 115,749 -2,427 -2.05 12,715 4.51 2.7377
2023-11-07 2023-09-30 13F Merck COM 58933Y105 118,176 -40 -0.03 12,166 -10.81 2.6929
2023-11-07 2023-06-30 13F Merck COM 58933Y105 118,216 2,166 1.87 13,641 10.48 2.9710
2023-05-15 2023-03-31 13F Merck COM 58933Y105 116,050 -987 -0.84 12,347 -5.67 2.9690
2023-02-13 2022-12-31 13F Merck COM 58933Y105 117,037 -2,681 -2.24 13,089 26.94 3.2203
2022-11-14 2022-09-30 13F Merck COM 58933Y105 119,718 -1,832 -1.51 10,310 -6.97 2.8172
2022-08-03 2022-06-30 13F Merck COM 58933Y105 121,550 -1,782 -1.44 11,082 9.52 2.7648
2022-05-11 2022-03-31 13F Merck COM 58933Y105 123,332 16,322 15.25 10,119 23.39 2.1418
2022-02-14 2021-12-31 13F Merck COM 58933Y105 107,010 2,446 2.34 8,201 4.42 1.9217
2021-11-12 2021-09-30 13F Merck COM 58933Y105 104,564 11,296 12.11 7,854 8.29 2.0142
2021-08-16 2021-06-30 13F Merck COM 58933Y105 93,268 49,402 112.62 7,253 114.46 1.7807
2021-05-14 2021-03-31 13F Merck COM 58933Y105 43,866 8,536 24.16 3,382 17.02 0.9399
2021-02-12 2020-12-31 13F Merck COM 58933Y105 35,330 1,348 3.97 2,890 2.52 0.8722
2020-11-12 2020-09-30 13F Merck COM 58933Y105 33,982 905 2.74 2,819 10.20 0.9778
2020-08-17 2020-06-30 13F Merck COM 58933Y105 33,077 -119 -0.36 2,558 0.16 0.9979
2020-05-13 2020-03-31 13F Merck COM 58933Y105 33,196 -965 -2.82 2,554 -17.80 1.1644
2020-02-12 2019-12-31 13F Merck COM 58933Y105 34,161 -278 -0.81 3,107 7.17 1.1972
2019-11-15 2019-09-30 13F Merck COM 58933Y105 34,439 -221 -0.64 2,899 -0.24 1.2350
2019-08-14 2019-06-30 13F Merck COM 58933Y105 34,660 -134 -0.39 2,906 0.41 1.2577
2019-05-14 2019-03-31 13F Merck COM 58933Y105 34,794 -151 -0.43 2,894 8.39 1.4059
2019-02-14 2018-12-31 13F Merck COM 58933Y105 34,945 -10,956 -23.87 2,670 -18.00 1.3901
2018-11-13 2018-09-30 13F Merck COM 58933Y105 45,901 -1,330 -2.82 3,256 13.57 1.5294
2018-08-10 2018-06-30 13F Merck COM 58933Y105 47,231 -4,510 -8.72 2,867 1.74 1.4051
2018-05-11 2018-03-31 13F Merck COM 58933Y105 51,741 -938 -1.78 2,818 -4.93 1.4656
2018-02-13 2017-12-31 13F Merck COM 58933Y105 52,679 -1,669 -3.07 2,964 -14.83 1.5354
2017-11-14 2017-09-30 13F Merck COM 58933Y105 54,348 -263 -0.48 3,480 -0.57 1.8917
2017-08-11 2017-06-30 13F Merck COM 58933Y105 54,611 -2,363 -4.15 3,500 -3.31 2.0393
2017-05-11 2017-03-31 13F Merck COM 58933Y105 56,974 -1,058 -1.82 3,620 5.97 2.0391
2017-02-14 2016-12-31 13F Merck COM 58933Y105 58,032 7,370 14.55 3,416 8.03 2.0453
2016-11-14 2016-09-30 13F Merck COM 58933Y105 50,662 -35,003 -40.86 3,162 -35.93 1.9629
2016-08-12 2016-06-30 13F Merck COM 58933Y105 85,665 -667 -0.77 4,935 8.03 2.9490
2016-05-13 2016-03-31 13F Merck COM 58933Y105 86,332 -2,910 -3.26 4,568 -3.10 2.9196
2016-02-11 2015-12-31 13F Merck COM 58933Y105 89,242 -1,007 -1.12 4,714 5.77 3.0539
2015-11-13 2015-09-30 13F Merck COM 58933Y105 90,249 -1,514 -1.65 4,457 -14.68 2.9622
2015-08-14 2015-06-30 13F Merck COM 58933Y105 91,763 -971 -1.05 5,224 -1.99 3.0867
2015-05-13 2015-03-31 13F Merck COM 58933Y105 92,734 -207 -0.22 5,330 0.99 3.1424
2015-02-13 2014-12-31 13F Merck COM 58933Y105 92,941 -673 -0.72 5,278 -4.88 3.0737
2014-11-12 2014-09-30 13F Merck COM 58933Y105 93,614 -2,106 -2.20 5,549 0.22 3.2198
2014-08-13 2014-06-30 13F Merck COM 58933Y105 95,720 -1,063 -1.10 5,537 0.78 2.9566
2014-05-14 2014-03-31 13F Merck COM 58933Y105 96,783 -5,167 -5.07 5,494 7.66 3.0302
2014-02-12 2013-12-31 13F Merck COM 58933Y105 101,950 -1,100 -1.07 5,103 4.02 2.8168
2013-11-13 2013-09-30 13F Merck COM 58933Y105 103,050 -1,467 -1.40 4,906 1.05 2.7065
2013-08-13 2013-06-30 13F Merck COM 58933Y105 104,517 -121,467 -53.75 4,855 -51.39 2.6503
2013-05-21 2013-03-31 13F Merck COM 58933Y105 225,984 225,984 9,988 2.3344
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.