Merck & Co., Inc.
MX ˙ BMV ˙ US58933Y1055
SecurityMX:MRK / Merck & Co., Inc.
InstitutionCapWealth Advisors, LLC
Latest Disclosed Ownership271,272 shares
Latest Disclosed Value $ 32,631,320
CapWealth Advisors, LLC reports 17.37% decrease in ownership of MRK / Merck & Co., Inc.

On May 5, 2026 - CapWealth Advisors, LLC filed a 13F-HR form disclosing ownership of 271,272 shares of Merck & Co., Inc. (MX:MRK) valued at $32,631,320 USD as of March 31, 2026. The entity filed a previous 13F-HR/A on February 6, 2026 disclosing 328,315 shares of Merck & Co., Inc.. This represents a change in shares of -17.37% 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)
2026-05-05 2026-03-31 13F MERCK & CO INC COM Stock 58933Y105 271,272 -57,043 -17.37 32,631 -5.58 2.4222
2026-02-06 2025-12-31 13F/A-1 MERCK & CO INC COM Stock 58933Y105 328,315 2,335 0.72 34,558 26.31 2.3652
2026-02-02 2025-12-31 13F MERCK & CO INC COM Stock 58933Y105 328,315 2,335 34,558 2.3490
2026-02-06 2025-09-30 13F/A-2 MERCK & CO INC COM Stock 58933Y105 325,980 454 0.14 27,359 6.17 1.8837
2025-10-30 2025-09-30 13F/A-1 MERCK & CO INC COM Stock 58933Y105 325,980 454 27,359 1.8699
2025-10-21 2025-09-30 13F MERCK & CO INC COM Stock 58933Y105 325,980 454 27,359 2.4666
2025-07-29 2025-06-30 13F MERCK & CO INC COM Stock 58933Y105 325,526 95,162 41.31 25,769 24.62 2.5369
2025-04-30 2025-03-31 13F MERCK & CO INC COM Stock 58933Y105 230,364 15,770 7.35 20,677 -3.14 2.2388
2025-01-30 2024-12-31 13F MERCK & CO INC COM Stock 58933Y105 214,594 -6,415 -2.90 21,348 -14.94 2.3400
2024-10-31 2024-09-30 13F MERCK & CO INC COM Stock 58933Y105 221,009 5,880 2.73 25,098 -5.76 2.7295
2024-08-05 2024-06-30 13F MERCK & CO INC COM Stock 58933Y105 215,129 -5,804 -2.63 26,633 -8.64 3.3643
2024-05-03 2024-03-31 13F MERCK & CO INC COM Stock 58933Y105 220,933 -5,561 -2.46 29,152 18.06 3.2722
2024-01-31 2023-12-31 13F MERCK & CO INC COM Stock 58933Y105 226,494 -1,406 -0.62 24,692 5.24 3.0116
2023-11-01 2023-09-30 13F MERCK & CO INC COM Stock 58933Y105 227,900 1,037 0.46 23,462 -10.37 3.0109
2023-08-07 2023-06-30 13F MERCK & CO INC COM Stock 58933Y105 226,863 -2,923 -1.27 26,178 7.08 3.1930
2023-05-02 2023-03-31 13F MERCK & CO INC COM Stock 58933Y105 229,786 -1,617 -0.70 24,447 -4.78 3.0495
2023-02-01 2022-12-31 13F MERCK & CO INC COM Stock 58933Y105 231,403 1,009 0.44 25,674 29.39 3.0174
2022-11-02 2022-09-30 13F MERCK & CO INC COM Stock 58933Y105 230,394 1,781 0.78 19,842 -4.80 2.6184
2022-08-05 2022-06-30 13F MERCK & CO INC COM Stock 58933Y105 228,613 -22,090 -8.81 20,843 1.33 2.5138
2022-05-04 2022-03-31 13F/A-2 MERCK & CO INC COM Stock 58933Y105 250,703 -651 -0.26 20,570 6.78 2.1057
2022-05-03 2022-03-31 13F/A-1 MERCK & CO INC COM Stock 58933Y105 253,103 1,749 20,767 2.0087
2022-05-02 2022-03-31 13F MERCK & CO INC COM Stock 58933Y105 253,103 1,749 20,767 2.2117
2022-02-10 2021-12-31 13F MERCK & CO INC COM COM 58933Y105 251,354 62,042 32.77 19,264 35.48 1.9601
2021-11-09 2021-09-30 13F MERCK & CO INC COM COM 58933Y105 189,312 3,995 2.16 14,219 -1.34 1.5576
2021-08-10 2021-06-30 13F MERCK & CO. INC COM COM 58933Y105 185,317 31,380 20.38 14,412 21.45 1.5643
2021-05-03 2021-03-31 13F MERCK & CO. INC COM COM 58933Y105 153,937 -2,659 -1.70 11,867 -7.36 1.3504
2021-02-17 2020-12-31 13F/A-1 MERCK & CO. INC COM COM 58933Y105 156,596 2,265 1.47 12,810 0.06 1.5267
2021-02-02 2020-12-31 13F MERCK & CO. INC COM COM 58933Y105 156,796 2,465 12,826 1,550,220.8213
2020-11-12 2020-09-30 13F MERCK & CO. INC COM COM 58933Y105 154,331 -1,390 -0.89 12,802 6.31 1.7099
2020-08-12 2020-06-30 13F MERCK & CO. INC COM COM 58933Y105 155,721 3,232 2.12 12,042 2.63 1.7018
2020-05-08 2020-03-31 13F/A-1 MERCK & CO. INC COM COM 58933Y105 152,489 -1,010 -0.66 11,733 -15.96 2.0996
2020-05-08 2020-03-31 13F MERCK COM 58933Y105 156,453 2,954 13,119 1,875,844.5161
2020-02-18 2019-12-31 13F/A-1 MERCK COM 58933Y105 153,499 -2,755 -1.76 13,961 6.14 1.7569
2020-02-06 2019-12-31 13F MERCK COM 58933Y105 153,499 -2,755 13,961 1,796,969.8257
2019-10-29 2019-09-30 13F MERCK COM 58933Y105 156,254 -199 -0.13 13,153 0.26 1.7497
2019-08-13 2019-06-30 13F MERCK COM 58933Y105 156,453 1,595 1.03 13,119 1.86 1.8758
2019-05-15 2019-03-31 13F MERCK & CO INC COM COM 58933Y105 154,858 -1,845 -1.18 12,880 7.57 1.9752
2019-02-15 2018-12-31 13F MERCK & CO INC COM COM 58933Y105 156,703 9,566 6.50 11,974 14.72 2.1043
2018-11-14 2018-09-30 13F MERCK & COMPANY INC COM 58933Y105 147,137 948 0.65 10,438 17.62 1.7129
2018-08-15 2018-06-30 13F MERCK & COMPANY INC COM 58933Y105 146,189 2,174 1.51 8,874 13.12 1.5896
2018-05-14 2018-03-31 13F/A-1 MERCK & COMPANY INC COM 58933Y105 144,015 -929 -0.64 7,845 -3.81 1.5170
2018-05-11 2018-03-31 13F MERCK & COMPANY INC COM 58933Y105 144,944 0 8,156
2018-02-15 2017-12-31 13F MERCK & COMPANY INC COM 58933Y105 144,944 3,479 2.46 8,156 -9.96 1.4678
2017-11-13 2017-09-30 13F MERCK & COMPANY INC COM 58933Y105 141,465 1,757 1.26 9,058 1.16 1.7398
2017-08-14 2017-06-30 13F MERCK & COMPANY INC COM 58933Y105 139,708 -2,165 -1.53 8,954 -0.68 1.7949
2017-05-12 2017-03-31 13F MERCK & COMPANY INC COM 58933Y105 141,873 -760 -0.53 9,015 7.36 1.8458
2017-02-14 2016-12-31 13F MERCK & COMPANY INC COM 58933Y105 142,633 -6,091 -4.10 8,397 -9.53 1.8167
2016-11-14 2016-09-30 13F MERCK & COMPANY INC COM 58933Y105 148,724 -3,212 -2.11 9,282 6.04 2.2314
2016-08-03 2016-06-30 13F MERCK & COMPANY INC COM 58933Y105 151,936 710 0.47 8,753 9.40 2.1389
2016-05-11 2016-03-31 13F MERCK & COMPANY INC COM 58933Y105 151,226 -1,110 -0.73 8,001 -0.56 2.0352
2016-02-11 2015-12-31 13F MERCK & COMPANY INC COM 58933Y105 152,336 -379 -0.25 8,046 6.67 1.9485
2015-11-12 2015-09-30 13F MERCK & COMPANY INC COM 58933Y105 152,715 5,830 3.97 7,543 -9.79 1.8892
2015-08-14 2015-06-30 13F MERCK & COMPANY INC COM 58933Y105 146,885 6,610 4.71 8,362 3.71 1.9714
2015-05-12 2015-03-31 13F MERCK & COMPANY INC COM 58933Y105 140,275 4,596 3.39 8,063 4.65 1.8954
2015-02-11 2014-12-31 13F MERCK & COMPANY INC COM 58933Y105 135,679 6,836 5.31 7,705 0.88 1.8086
2014-11-12 2014-09-30 13F MERCK & COMPANY INC COM 58933Y105 128,843 2,743 2.18 7,638 4.70 1.7338
2014-08-08 2014-06-30 13F MERCK & COMPANY INC COM 58933Y105 126,100 5,375 4.45 7,295 6.43 1.6710
2014-05-12 2014-03-31 13F MERCK & COMPANY INC COM 58933Y105 120,725 2,470 2.09 6,854 15.80 1.8439
2014-02-13 2013-12-31 13F MERCK & COMPANY INC COM 58933Y105 118,255 -10,074 -7.85 5,919 -3.13 1.4928
2013-11-13 2013-09-30 13F MERCK & COMPANY INC COM 58933Y105 128,329 2,673 2.13 6,110 4.68 1.7007
2013-07-26 2013-06-30 13F MERCK & COMPANY INC COM 58933Y105 125,656 125,656 5,837 1.7044
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.