Merck & Co., Inc.
BG ˙ BUL ˙ US58933Y1055
SecurityBG:6MK / Merck & Co., Inc.
InstitutionJacobs & Co/ca
Latest Disclosed Ownership106,849 shares
Latest Disclosed Value $ 12,852
Jacobs & Co/ca reports 2.04% decrease in ownership of 6MK / Merck & Co., Inc.

On April 7, 2026 - Jacobs & Co/ca filed a 13F-HR form disclosing ownership of 106,849 shares of Merck & Co., Inc. (BG:6MK) valued at $12,852 USD as of March 31, 2026. The entity filed a previous 13F-HR on January 5, 2026 disclosing 109,069 shares of Merck & Co., Inc.. This represents a change in shares of -2.04% 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)
2026-04-07 2026-03-31 13F Merck PLCSHS 58933Y105 106,849 -2,220 -2.04 13 9.09 1.2685
2026-01-05 2025-12-31 13F Merck PLCSHS 58933Y105 109,069 -229 -0.21 11 22.22 1.0833
2025-10-01 2025-09-30 13F Merck PLCSHS 58933Y105 109,298 -1,709 -1.54 9 12.50 0.8775
2025-07-02 2025-06-30 13F Merck PLCSHS 58933Y105 111,007 -3,223 -2.82 9 -20.00 0.8719
2025-04-03 2025-03-31 13F Merck PLCSHS 58933Y105 114,230 589 0.52 10 -9.09 1.0929
2025-01-10 2024-12-31 13F Merck PLCSHS 58933Y105 113,641 4,751 4.36 11 -8.33 1.1501
2024-10-01 2024-09-30 13F Merck PLCSHS 58933Y105 108,890 6,407 6.25 12 0.00 1.2364
2024-07-12 2024-06-30 13F Merck PLCSHS 58933Y105 102,483 -707 -0.69 13 -7.69 1.3296
2024-04-12 2024-03-31 13F Merck PLCSHS 58933Y105 103,190 -3,133 -2.95 14 18.18 1.4413
2024-01-18 2023-12-31 13F Merck PLCSHS 58933Y105 106,323 5,071 5.01 12 10.00 1.3147
2023-10-13 2023-09-30 13F Merck COM 58933Y105 101,252 1,298 1.30 10 -9.09 1.2989
2023-07-11 2023-06-30 13F Merck COM 58933Y105 99,954 -6,026 -5.69 12 0.00 1.3714
2023-04-17 2023-03-31 13F Merck COM 58933Y105 105,980 -7,928 -6.96 11 -8.33 1.3921
2023-01-13 2022-12-31 13F Merck COM 58933Y105 113,908 -14,002 -10.95 13 -99.89 1.6449
2022-10-11 2022-09-30 13F Merck COM 58933Y105 127,910 -1,498 -1.16 11,015 -6.64 1.5835
2022-07-19 2022-06-30 13F Merck COM 58933Y105 129,408 -10,681 -7.62 11,798 2.64 1.5800
2022-04-14 2022-03-31 13F Merck COM 58933Y105 140,089 -1,911 -1.35 11,494 5.62 1.2726
2022-01-21 2021-12-31 13F Merck COM 58933Y105 142,000 4,424 3.22 10,882 5.31 1.1283
2021-10-13 2021-09-30 13F Merck COM 58933Y105 137,576 8,702 6.75 10,333 3.10 1.1885
2021-07-15 2021-06-30 13F Merck COM 58933Y105 128,874 15,617 13.79 10,022 14.79 1.1576
2021-04-05 2021-03-31 13F Merck COM 58933Y105 113,257 10,204 9.90 8,731 3.58 1.0670
2021-01-12 2020-12-31 13F Merck COM 58933Y105 103,053 10,318 11.13 8,429 9.58 1.0949
2020-12-03 2020-09-30 13F Merck COM 58933Y105 92,735 5,320 6.09 7,692 13.80 1.1160
2020-07-09 2020-06-30 13F Merck COM 58933Y105 87,415 9,084 11.60 6,759 12.16 1.1001
2020-04-13 2020-03-31 13F Merck COM 58933Y105 78,331 942 1.22 6,026 -14.38 1.1631
2020-01-29 2019-12-31 13F Merck COM 58933Y105 77,389 6,628 9.37 7,038 18.17 1.0691
2019-11-04 2019-09-30 13F Merck COM 58933Y105 70,761 655 0.93 5,956 1.33 0.9659
2019-08-01 2019-06-30 13F Merck COM 58933Y105 70,106 25,709 57.91 5,878 59.21 0.9487
2019-04-29 2019-03-31 13F Merck COM 58933Y105 44,397 -341 -0.76 3,692 8.02 0.6288
2019-02-07 2018-12-31 13F Merck COM 589331107 44,738 -1,370 -2.97 3,418 4.53 0.6737
2018-10-23 2018-09-30 13F Merck COM 589331107 46,108 -1,957 -4.07 3,270 12.10 0.5529
2018-07-19 2018-06-30 13F Merck COM 589331107 48,065 -2,851 -5.60 2,917 5.19 0.5282
2018-04-27 2018-03-31 13F Merck COM 589331107 50,916 189 0.37 2,773 -2.84 0.5121
2018-02-09 2017-12-31 13F Merck COM 589331107 50,727 -525 -1.02 2,854 -13.01 0.5158
2017-11-14 2017-09-30 13F Merck COM 589331107 51,252 1,550 3.12 3,281 3.01 0.6168
2017-07-13 2017-06-30 13F Merck COM 589331107 49,702 -205 -0.41 3,185 0.44 0.6271
2017-04-12 2017-03-31 13F Merck COM 589331107 49,907 832 1.70 3,171 9.76 0.6516
2017-01-18 2016-12-31 13F Merck COM 589331107 49,075 3,220 7.02 2,889 0.98 0.6266
2016-10-11 2016-09-30 13F Merck COM 589331107 45,855 -250 -0.54 2,861 7.72 0.6379
2016-07-08 2016-06-30 13F Merck COM 589331107 46,105 -575 -1.23 2,656 7.57 0.6240
2016-04-14 2016-03-31 13F Merck COM 589331107 46,680 13 0.03 2,469 2.24 0.5942
2016-01-14 2015-12-31 13F Merck COM 589331107 46,667 -837 -1.76 2,415 2.94 0.6256
2015-10-15 2015-09-30 13F Merck COM 589331107 47,504 440 0.93 2,346 -12.43 0.6230
2015-07-02 2015-06-30 13F Merck COM 589331107 47,064 1,095 2.38 2,679 1.40 0.6705
2015-04-07 2015-03-31 13F Merck COM 589331107 45,969 -25 -0.05 2,642 1.19 0.6691
2015-03-10 2014-12-31 13F Merck COM 589331107 45,994 4,385 10.54 2,611 5.84 0.6874
2014-10-07 2014-09-30 13F Merck COM 589331107 41,609 -100 -0.24 2,467 2.24 0.6977
2014-07-16 2014-06-30 13F/A-1 Merck COM 589331107 41,709 62 0.15 2,413 2.07 0.6993
2014-07-15 2014-06-30 13F Merck COM 589331107 41,709 2,413
2014-04-22 2014-03-31 13F Merck COM 589331107 41,647 1,480 3.68 2,364 17.61 0.7333
2014-01-27 2013-12-31 13F Merck COM 589331107 40,167 200 0.50 2,010 5.68 0.6433
2013-10-09 2013-09-30 13F Merck COM 589331107 39,967 -2,000 -4.77 1,902 -2.41 0.6614
2013-07-19 2013-06-30 13F Merck COM 589331107 41,967 41,967 1,949 0.7063
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.