Merck & Co., Inc.
MX ˙ BMV ˙ US58933Y1055
SecurityMX:MRK / Merck & Co., Inc.
InstitutionBlue Fin Capital, Inc.
Latest Disclosed Ownership26,625 shares
Latest Disclosed Value $ 3,202,729
Blue Fin Capital, Inc. reports 7.28% decrease in ownership of MRK / Merck & Co., Inc.

On May 28, 2026 - Blue Fin Capital, Inc. filed a 13F-HR form disclosing ownership of 26,625 shares of Merck & Co., Inc. (MX:MRK) valued at $3,202,729 USD as of March 31, 2026. The entity filed a previous 13F-HR on January 23, 2026 disclosing 28,715 shares of Merck & Co., Inc.. This represents a change in shares of -7.28% 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)
2026-05-28 2026-03-31 13F MERCK COM 58933Y105 26,625 -2,090 -7.28 3,203 5.96 0.5254
2026-01-23 2025-12-31 13F MERCK COM 58933Y105 28,715 -636 -2.17 3,023 22.70 0.4687
2025-11-21 2025-09-30 13F MERCK COM 58933Y105 29,351 -586 -1.96 2,463 3.97 0.3873
2025-08-13 2025-06-30 13F MERCK COM 58933Y105 29,937 -530 -1.74 2,370 -13.35 0.4035
2025-11-21 2025-03-31 13F MERCK COM 58933Y105 30,467 -282 -0.92 2,735 -10.60 0.5305
2025-02-18 2024-12-31 13F MERCK COM 58933Y105 30,749 -1 -0.00 3,059 -12.43 0.5638
2024-11-05 2024-09-30 13F MERCK COM 58933Y105 30,750 -51 -0.17 3,492 -8.42 0.6636
2024-07-31 2024-06-30 13F MERCK COM 58933Y105 30,801 68 0.22 3,813 -5.97 0.7614
2024-05-14 2024-03-31 13F MERCK COM 58933Y105 30,733 -555 -1.77 4,055 18.88 0.9041
2024-02-06 2023-12-31 13F MERCK COM 58933Y105 31,288 -167 -0.53 3,411 5.34 0.8755
2023-10-19 2023-09-30 13F MERCK COM 58933Y105 31,455 170 0.54 3,238 -10.30 0.9456
2023-07-31 2023-06-30 13F MERCK COM 58933Y105 31,285 2 0.01 3,610 -1.66 1.0310
2023-05-12 2023-03-31 13F MERCK COM 58933Y105 31,283 87 0.28 3,672 6.07 1.1864
2023-01-23 2022-12-31 13F MERCK COM 58933Y105 31,196 73 0.23 3,461 29.14 1.2678
2022-11-04 2022-09-30 13F MERCK & CO INC COM COM 58933Y105 31,123 1,242 4.16 2,680 -1.62 1.0125
2022-08-08 2022-06-30 13F MERCK & CO INC COM COM 58933Y105 29,881 37 0.12 2,724 11.27 0.9645
2022-04-12 2022-03-31 13F MERCK & CO INC COM COM 58933Y105 29,844 141 0.47 2,448 7.56 0.7096
2022-01-19 2021-12-31 13F MERCK & CO INC COM COM 58933Y105 29,703 -459 -1.52 2,276 0.49 0.6303
2021-10-25 2021-09-30 13F MERCK & CO INC COM COM 58933Y105 30,162 -177 -0.58 2,265 -3.98 0.6915
2021-07-19 2021-06-30 13F MERCK & CO INC COM COM 58933Y105 30,339 39 0.13 2,359 1.03 0.7267
2021-05-05 2021-03-31 13F MERCK & CO. INC COM COM 58933Y105 30,300 128 0.42 2,335 -5.39 0.8002
2021-01-28 2020-12-31 13F MERCK & CO. INC COM COM 58933Y105 30,172 640 2.17 2,468 0.78 0.8832
2020-10-28 2020-09-30 13F MERCK & CO. INC COM COM 58933Y105 29,532 219 0.75 2,449 8.08 0.9907
2020-08-10 2020-06-30 13F MERCK & CO. INC COM COM 58933Y105 29,313 470 1.63 2,266 2.12 1.0030
2020-04-28 2020-03-31 13F MERCK & CO. INC COM COM 58933Y105 28,843 -298 -1.02 2,219 -16.20 1.2247
2020-02-10 2019-12-31 13F MERCK & CO INC COM COM 58933Y105 29,141 799 2.82 2,648 11.03 1.2477
2019-11-07 2019-09-30 13F MERCK & CO INC COM COM 58933Y105 28,342 -1,730 -5.75 2,385 -5.39 1.2486
2019-07-22 2019-06-30 13F MERCK & CO INC COM COM 58933Y105 30,072 178 0.60 2,521 1.41 1.2990
2019-04-23 2019-03-31 13F MERCK & CO INC COM COM 58933Y105 29,894 -469 -1.54 2,486 7.16 1.3052
2019-01-16 2018-12-31 13F MERCK & CO INC COM COM 58933Y105 30,363 133 0.44 2,320 8.16 1.3855
2018-12-27 2018-09-30 13F/A-2 MERCK & CO INC COM COM 58933Y105 30,230 -185 -0.61 2,145 16.20 1.0624
2018-11-09 2018-09-30 13F MERCK & CO INC COM COM 58933Y105 30,230 -185 2,145
2018-12-31 2018-06-30 13F/A-2 MERCK & CO INC COM COM 58933Y105 30,415 1,357 4.67 1,846 16.69 0.9863
2018-08-06 2018-06-30 13F MERCK & CO INC COM COM 58933Y105 30,415 1,357 1,846
2018-05-07 2018-03-31 13F MERCK & CO INC COM COM 58933Y105 29,058 2,865 10.94 1,582 7.33 0.8934
2018-01-26 2017-12-31 13F MERCK & CO INC COM COM 58933Y105 26,193 -2,010 -7.13 1,474 -18.34 0.8587
2017-10-11 2017-09-30 13F MERCK & CO INC COM COM 58933Y105 28,203 90 0.32 1,805 0.22 1.1065
2017-08-02 2017-06-30 13F MERCK & CO INC COM COM 58933Y105 28,113 -175 -0.62 1,801 0.22 1.1587
2017-05-01 2017-03-31 13F Merck COM 58933Y105 28,288 2,370 9.14 1,797 17.76 1.1010
2017-02-02 2016-12-31 13F Merck COM 58933Y105 25,918 5,430 26.50 1,526 19.31 1.0089
2016-10-21 2016-09-30 13F Merck COM 58933Y105 20,488 -735 -3.46 1,279 4.58 1.0366
2016-07-29 2016-06-30 13F Merck COM 58933Y105 21,223 -275 -1.28 1,223 7.56 1.0142
2016-04-14 2016-03-31 13F Merck COM 58933Y105 21,498 -3,620 -14.41 1,137 -14.32 0.9681
2016-01-07 2015-12-31 13F Merck COM 58933Y105 25,118 520 2.11 1,327 9.22 1.0222
2015-10-13 2015-09-30 13F Merck COM 58933Y105 24,598 350 1.44 1,215 -11.96 0.9455
2015-07-23 2015-06-30 13F Merck COM 58933Y105 24,248 550 2.32 1,380 1.32 0.9931
2015-04-06 2015-03-31 13F Merck COM 58933Y105 23,698 100 0.42 1,362 1.64 0.9834
2015-01-09 2014-12-31 13F Merck COM 58933Y105 23,598 580 2.52 1,340 -1.83 1.0102
2014-11-06 2014-09-30 13F Merck COM 58933Y105 23,018 300 1.32 1,365 3.88 1.0824
2014-07-29 2014-06-30 13F Merck COM 58933Y105 22,718 950 4.36 1,314 6.31 1.0532
2014-05-13 2014-03-31 13F Merck COM 58933Y105 21,768 55 0.25 1,236 13.71 1.0892
2014-02-07 2013-12-31 13F Merck COM 58933Y105 21,713 21,713 1,087 0.9684
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.