머크 앤 컴퍼니(Merck & Co., Inc.)
MX ˙ BMV ˙ US58933Y1055
SecurityMX:MRK / Merck & Co., Inc.
InstitutionDavis R M Inc
Latest Disclosed Ownership24,395 shares
Latest Disclosed Value $ 2,949,921
Davis R M Inc reports 1.25% increase in ownership of MRK / Merck & Co., Inc.

On May 13, 2026 - Davis R M Inc filed a 13F-HR form disclosing ownership of 24,395 shares of Merck & Co., Inc. (MX:MRK) valued at $2,949,921 USD as of March 31, 2026. The entity filed a previous 13F-HR on February 12, 2026 disclosing 24,093 shares of Merck & Co., Inc.. This represents a change in shares of 1.25% 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 24,395 302 1.25 2,950 16.29 0.0524
2026-02-12 2025-12-31 13F Merck COM 58933Y105 24,093 -2,311 -8.75 2,536 14.44 0.0437
2025-11-12 2025-09-30 13F Merck COM 58933Y105 26,404 -12,850 -32.74 2,216 -28.68 0.0387
2025-08-07 2025-06-30 13F Merck COM 58933Y105 39,254 -33,034 -45.70 3,107 -52.11 0.0576
2025-05-08 2025-03-31 13F Merck COM 58933Y105 72,288 -94,057 -56.54 6,489 -60.79 0.1299
2025-02-07 2024-12-31 13F Merck COM 58933Y105 166,345 -146,166 -46.77 16,548 -53.37 0.3229
2024-11-13 2024-09-30 13F Merck COM 58933Y105 312,511 -7,228 -2.26 35,489 -10.35 0.6858
2024-08-09 2024-06-30 13F Merck COM 58933Y105 319,739 1,263 0.40 39,584 -5.80 0.8037
2024-05-10 2024-03-31 13F Merck COM 58933Y105 318,476 -1,254 -0.39 42,023 20.56 0.8798
2024-02-09 2023-12-31 13F Merck COM 58933Y105 319,730 -4,635 -1.43 34,857 105,527.27 0.8041
2023-11-14 2023-09-30 13F Merck COM 58933Y105 324,365 4,085 1.28 33 -8.33 0.8377
2023-08-10 2023-06-30 13F Merck COM 58933Y105 320,280 2,118 0.67 37 9.09 0.8877
2023-05-01 2023-03-31 13F Merck COM 58933Y105 318,162 2,370 0.75 34 -5.71 0.8620
2023-02-14 2022-12-31 13F Merck COM 58933Y105 315,792 3,113 1.00 35 -99.87 0.9443
2022-11-08 2022-09-30 13F Merck COM 58933Y105 312,679 5,998 1.96 26,928 -3.69 0.7810
2022-08-08 2022-06-30 13F Merck COM 58933Y105 306,681 2,603 0.86 27,960 12.06 0.7795
2022-05-05 2022-03-31 13F Merck COM 58933Y105 304,078 3,336 1.11 24,950 8.25 0.5941
2022-02-08 2021-12-31 13F Merck COM 58933Y105 300,742 8,233 2.81 23,049 4.91 0.5137
2021-11-08 2021-09-30 13F Merck COM 58933Y105 292,509 234 0.08 21,970 -3.34 0.5448
2021-08-12 2021-06-30 13F Merck COM 58933Y105 292,275 356 0.12 22,730 1.00 0.5714
2021-05-10 2021-03-31 13F Merck COM 58933Y105 291,919 848 0.29 22,504 -5.49 0.6183
2021-01-27 2020-12-31 13F Merck COM 58933Y105 291,071 -15,096 -4.93 23,810 -6.25 0.6833
2020-12-01 2020-09-30 13F Merck COM 58933Y105 306,167 11,008 3.73 25,397 11.27 0.8300
2020-07-20 2020-06-30 13F Merck COM 58933Y105 295,159 9,063 3.17 22,825 3.69 0.8134
2020-04-24 2020-03-31 13F Merck COM 58933Y105 286,096 3,897 1.38 22,012 -14.24 0.9148
2020-01-23 2019-12-31 13F Merck COM 58933Y105 282,199 2,153 0.77 25,666 8.87 0.8414
2019-10-24 2019-09-30 13F Merck COM 58933Y105 280,046 4,683 1.70 23,574 2.10 0.8304
2019-07-31 2019-06-30 13F Merck COM 58933Y105 275,363 -2,891 -1.04 23,089 -0.23 0.8216
2019-04-29 2019-03-31 13F Merck COM 58933Y105 278,254 -1,597 -0.57 23,142 8.23 0.8613
2019-01-18 2018-12-31 13F Merck COM 58933Y105 279,851 9,918 3.67 21,383 11.67 0.8754
2018-10-17 2018-09-30 13F Merck COM 58933Y105 269,933 278 0.10 19,149 16.99 0.6948
2018-07-19 2018-06-30 13F MERCK COM 58933Y105 269,655 21,901 8.84 16,368 21.29 0.6368
2018-04-19 2018-03-31 13F MERCK COM 58933Y105 247,754 -1,264 -0.51 13,495 -3.69 0.5379
2018-01-16 2017-12-31 13F MERCK COM 58933Y105 249,018 -16,993 -6.39 14,012 -17.74 0.5495
2017-10-24 2017-09-30 13F MERCK COM 58933Y105 266,011 10,903 4.27 17,033 4.18 0.7039
2017-07-31 2017-06-30 13F MERCK COM 58933Y105 255,108 21,555 9.23 16,350 10.18 0.6911
2017-05-03 2017-03-31 13F MERCK COM 58933Y105 233,553 74,377 46.73 14,840 58.36 0.6708
2017-01-18 2016-12-31 13F MERCK COM 58933Y105 159,176 136,284 595.33 9,371 555.77 0.4478
2016-10-19 2016-09-30 13F MERCK COM 58933Y105 22,892 -1,548 -6.33 1,429 1.49 0.0697
2016-07-14 2016-06-30 13F MERCK COM 58933Y105 24,440 3,078 14.41 1,408 24.60 0.0692
2016-04-18 2016-03-31 13F MERCK COM 58933Y105 21,362 -926 -4.15 1,130 -3.99 0.0575
2016-01-14 2015-12-31 13F MERCK COM 58933Y105 22,288 -1,852 -7.67 1,177 -1.26 0.0602
2015-10-16 2015-09-30 13F MERCK COM 58933Y105 24,140 7,530 45.33 1,192 26.00 0.0637
2015-07-16 2015-06-30 13F MERCK COM 58933Y105 16,610 490 3.04 946 2.05 0.0489
2015-04-17 2015-03-31 13F MERCK COM 58933Y105 16,120 330 2.09 927 3.34 0.0488
2015-01-23 2014-12-31 13F MERCK COM 58933Y105 15,790 2,628 19.97 897 15.00 0.0494
2014-10-20 2014-09-30 13F/A-2 MERCK COM 58933Y105 13,162 1,815 16.00 780 18.90 0.0448
2014-10-20 2014-09-30 13F/A-1 MERCK COM 58933Y105 13,162 0 780 0.0448
2014-10-20 2014-09-30 13F MERCK COM 58933Y105 11,347 656
2014-07-15 2014-06-30 13F MERCK COM 58933Y105 11,347 -3,421 -23.16 656 -21.72 0.0377
2014-04-15 2014-03-31 13F MERCK COM 58933Y105 14,768 722 5.14 838 19.20 0.0509
2014-01-27 2013-12-31 13F MERCK COM 58933Y105 14,046 1,721 13.96 703 19.76 0.0430
2013-10-23 2013-09-30 13F MERCK COM 58933Y105 12,325 414 3.48 587 6.15 0.0396
2013-08-12 2013-06-30 13F MERCK COM 58933Y105 11,911 11,911 553 0.0395
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.