Merck & Co., Inc.
MX ˙ BMV ˙ US58933Y1055
SecurityMX:MRK / Merck & Co., Inc.
InstitutionCardinal Capital Management
Latest Disclosed Ownership96,637 shares
Latest Disclosed Value $ 11,706,052
Cardinal Capital Management reports 0.36% increase in ownership of MRK / Merck & Co., Inc.

On April 8, 2026 - Cardinal Capital Management filed a 13F-HR form disclosing ownership of 96,637 shares of Merck & Co., Inc. (MX:MRK) valued at $11,706,052 USD as of March 31, 2026. The entity filed a previous 13F-HR on January 30, 2026 disclosing 96,293 shares of Merck & Co., Inc.. This represents a change in shares of 0.36% 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)
2026-04-08 2026-03-31 13F MERCK COM 58933Y105 96,637 344 0.36 11,706 14.58 1.5092
2026-01-30 2025-12-31 13F MERCK COMMON STOCK 58933Y105 96,293 1,353 1.43 10,217 27.00 1.3532
2025-10-23 2025-09-30 13F MERCK Common Stock 58933Y105 94,940 2,203 2.38 8,044 8.48 1.1120
2025-07-15 2025-06-30 13F MERCK Common Stock 58933Y105 92,737 4,939 5.63 7,415 -6.73 1.0882
2025-04-18 2025-03-31 13F MERCK Common Stock 58933Y105 87,798 15,180 20.90 7,951 9.05 1.2313
2025-01-31 2024-12-31 13F MERCK Common Stock 58933Y105 72,618 -4,682 -6.06 7,290 -17.50 1.1433
2024-10-16 2024-09-30 13F MERCK Common Stock 58933Y105 77,300 4,182 5.72 8,837 -2.98 1.3748
2024-07-12 2024-06-30 13F MERCK Common Stock 58933Y105 73,118 83 0.11 9,108 -6.01 1.5340
2024-07-12 2024-03-31 13F/A-1 MERCK Common Stock 58933Y105 73,035 4,132 6.00 9,689 28.09 1.5766
2024-04-15 2024-03-31 13F MERCK Common Stock 58933Y105 73,035 4,132 9,689 1.5766
2024-07-12 2023-12-31 13F/A-1 MERCK COM 58933Y105 68,903 155 0.23 7,564 6.13 1.4324
2024-01-29 2023-12-31 13F MERCK COM 58933Y105 68,903 155 7,564 1.4324
2024-07-12 2023-09-30 13F/A-1 MERCK Common Stock 58933Y105 68,748 540 0.79 7,127 -10.00 1.4508
2023-10-16 2023-09-30 13F MERCK Common Stock 58933Y105 68,748 540 7,127 1.4508
2024-07-12 2023-06-30 13F/A-1 MERCK Common Stock 58933Y105 68,208 62 0.09 7,920 8.51 1.5949
2023-07-12 2023-06-30 13F MERCK Common Stock 58933Y105 68,208 62 7,920 1.5949
2023-04-19 2023-03-31 13F MERCK Common Stock 58933Y105 68,146 -600 -0.87 7,299 -4.31 1.5144
2023-01-23 2022-12-31 13F Merck COM 58933Y105 68,746 -889 -1.28 7,627 27.18 1.6236
2022-10-24 2022-09-30 13F Merck Common Stock 58933Y105 69,635 488 0.71 5,997 -4.87 1.4193
2022-08-04 2022-06-30 13F Merck Common Stock 58933Y105 69,147 473 0.69 6,304 11.87 1.4425
2022-04-21 2022-03-31 13F Merck Common Stock 58933Y105 68,674 2,509 3.79 5,635 11.12 1.1399
2022-01-18 2021-12-31 13F Merck Common Stock 58933Y105 66,165 -76 -0.11 5,071 1.93 1.0042
2021-10-21 2021-09-30 13F Merck Common Stock 58933Y105 66,241 -691 -1.03 4,975 -4.42 1.0772
2021-07-14 2021-06-30 13F Merck Common Stock 58933Y105 66,932 1,574 2.41 5,205 3.31 1.0989
2021-04-19 2021-03-31 13F Merck Common Stock 58933Y105 65,358 2,703 4.31 5,038 -1.70 1.1109
2021-02-01 2020-12-31 13F Merck Common Stock 58933Y105 62,655 1,368 2.23 5,125 0.81 1.2134
2020-10-16 2020-09-30 13F Merck Common Stock 58933Y105 61,287 432 0.71 5,084 8.06 1.4007
2020-07-16 2020-06-30 13F Merck Common Stock 58933Y105 60,855 78 0.13 4,705 0.62 1.3537
2020-04-20 2020-03-31 13F Merck Common Stock 58933Y105 60,777 -1,879 -3.00 4,676 -17.95 1.5444
2020-01-21 2019-12-31 13F Merck Common Stock 58933Y105 62,656 -1,248 -1.95 5,699 5.95 1.4798
2019-10-18 2019-09-30 13F Merck Common Stock 58933Y105 63,904 -423 -0.66 5,379 -0.28 1.4858
2019-07-08 2019-06-30 13F Merck Common Stock 58933Y105 64,327 -276 -0.43 5,394 0.39 1.5307
2019-04-11 2019-03-31 13F Merck Common Stock 58933Y105 64,603 -475 -0.73 5,373 8.07 1.5352
2019-01-15 2018-12-31 13F Merck Common Stock 58933Y105 65,078 580 0.90 4,972 8.68 1.6388
2018-10-25 2018-09-30 13F Merck Common Stock 58933Y105 64,498 -571 -0.88 4,575 15.82 1.2945
2018-07-25 2018-06-30 13F Merck Common Stock 58933Y105 65,069 -32 -0.05 3,950 11.39 1.1957
2018-04-24 2018-03-31 13F Merck Common Stock 58933Y105 65,101 -1,237 -1.86 3,546 -5.01 1.1141
2018-02-01 2017-12-31 13F Merck Common Stock 58933Y105 66,338 1,264 1.94 3,733 -10.39 1.1297
2017-10-24 2017-09-30 13F Merck COM 58933Y105 65,074 -334 -0.51 4,166 -0.62 1.3151
2017-07-27 2017-06-30 13F Merck Common Stock 58933Y105 65,408 2,894 4.63 4,192 5.54 1.3859
2017-04-25 2017-03-31 13F Merck Common Stock 58933Y105 62,514 -429 -0.68 3,972 7.21 1.4374
2017-02-17 2016-12-31 13F/A-1 Merck Common Stock 58933Y105 62,943 306 0.49 3,705 -5.22 1.4108
2017-01-23 2016-12-31 13F Merck Common Stock 58933Y105 62,943 3,705
2016-11-02 2016-09-30 13F Merck Common Stock 58933Y105 62,637 1,354 2.21 3,909 10.71 1.5331
2016-07-27 2016-06-30 13F Merck Common Stock 58933Y105 61,283 0 0.00 3,531 8.91 1.4355
2016-04-21 2016-03-31 13F Merck Common Stock 58933Y105 61,283 2,886 4.94 3,242 5.09 1.3615
2016-01-29 2015-12-31 13F Merck Common Stock 58933Y105 58,397 -2,303 -3.79 3,085 2.90 1.3776
2015-10-23 2015-09-30 13F Merck Common Stock 58933Y105 60,700 45 0.07 2,998 -13.18 1.4017
2015-08-03 2015-06-30 13F Merck Common Stock 58933Y105 60,655 1,808 3.07 3,453 2.07 1.5082
2015-04-24 2015-03-31 13F Merck Common Stock 58933Y105 58,847 58,847 3,383 1.4287
2015-01-28 2014-12-31 13F Merck Common Stock 58933Y105 0 -59,102 -100.00 0 -100.00
2014-10-24 2014-09-30 13F Merck Common Stock 58933Y105 59,102 -217 -0.37 3,504 2.10 1.6667
2014-07-22 2014-06-30 13F Merck Common Stock 58933Y105 59,319 544 0.93 3,432 2.85 1.7019
2014-04-25 2014-03-31 13F Merck Common Stock 58933Y105 58,775 -3,897 -6.22 3,337 6.38 1.7168
2014-01-24 2013-12-31 13F Merck Common Stock 58933Y105 62,672 734 1.19 3,137 6.38 1.6078
2013-10-28 2013-09-30 13F Merck Common Stock 58933Y105 61,938 962 1.58 2,949 4.13 1.6741
2013-07-24 2013-06-30 13F Merck Common Stock 58933Y105 60,976 60,976 2,832 1.6763
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.