Merck & Co., Inc.
MX ˙ BMV ˙ US58933Y1055
SecurityMX:MRK / Merck & Co., Inc.
InstitutionPinnacle Holdings, LLC
Latest Disclosed Ownership12,053 shares
Latest Disclosed Value $ 1,449,855
Pinnacle Holdings, LLC reports 11.78% increase in ownership of MRK / Merck & Co., Inc.

On May 8, 2026 - Pinnacle Holdings, LLC filed a 13F-HR form disclosing ownership of 12,053 shares of Merck & Co., Inc. (MX:MRK) valued at $1,449,855 USD as of March 31, 2026. The entity filed a previous 13F-HR on February 12, 2026 disclosing 10,783 shares of Merck & Co., Inc.. This represents a change in shares of 11.78% 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)
2026-05-08 2026-03-31 13F Merck COM 58933Y105 12,053 1,270 11.78 1,450 27.67 0.4688
2026-02-12 2025-12-31 13F Merck COM 58933Y105 10,783 297 2.83 1,135 28.98 0.3835
2025-11-12 2025-09-30 13F Merck COM 58933Y105 10,486 -48 -0.46 880 5.64 0.3068
2025-08-07 2025-06-30 13F Merck COM 58933Y105 10,534 632 6.38 834 -6.19 0.3008
2025-05-13 2025-03-31 13F Merck COM 58933Y105 9,902 -586 -5.59 889 -14.86 0.3378
2025-02-13 2024-12-31 13F Merck COM 58933Y105 10,488 -1,032 -8.96 1,043 -20.26 0.3938
2024-11-12 2024-09-30 13F Merck COM 58933Y105 11,520 221 1.96 1,308 -6.44 0.5108
2024-08-13 2024-06-30 13F Merck COM 58933Y105 11,299 -145 -1.27 1,399 -7.42 0.5685
2024-05-09 2024-03-31 13F Merck COM 58933Y105 11,444 -785 -6.42 1,510 13.28 0.6067
2024-02-14 2023-12-31 13F Merck COM 58933Y105 12,229 84 0.69 1,333 6.64 0.5485
2023-11-14 2023-09-30 13F Merck COM 58933Y105 12,145 -998 -7.59 1,250 -17.55 0.5858
2023-08-11 2023-06-30 13F Merck COM 58933Y105 13,143 -9 -0.07 1,517 8.36 0.6770
2023-05-12 2023-03-31 13F Merck COM 58933Y105 13,152 -31 -0.24 1,399 -4.31 0.6485
2023-02-13 2022-12-31 13F Merck COM 58933Y105 13,183 -2,011 -13.24 1,463 11.77 0.6541
2022-11-14 2022-09-30 13F/A-1 Merck COM 58933Y105 15,194 521 3.55 1,309 -2.17 0.6128
2022-11-14 2022-09-30 13F Merck COM 58933Y105 14,673 0 1,338 0.6127
2022-08-11 2022-06-30 13F Merck COM 58933Y105 14,673 141 0.97 1,338 12.16 0.6127
2022-05-13 2022-03-31 13F Merck COM 58933Y105 14,532 1,248 9.39 1,192 17.09 0.4683
2022-02-14 2021-12-31 13F Merck COM 58933Y105 13,284 28 0.21 1,018 2.31 0.4278
2021-11-12 2021-09-30 13F Merck COM 58933Y105 13,256 -363 -2.67 996 -99.91 0.4368
2021-08-13 2021-06-30 13F Merck COM 58933Y105 13,619 200 1.49 1,059,150 102,332.30 0.4870
2021-05-12 2021-03-31 13F Merck COM 58933Y105 13,419 -28 -0.21 1,034 -5.91 0.4787
2021-02-12 2020-12-31 13F Merck COM 58933Y105 13,447 -275 -2.00 1,100 -3.43 0.5799
2020-11-13 2020-09-30 13F/A-1 Merck COM 58933Y105 13,722 -8,390 -37.94 1,138 -33.41 0.6581
2020-11-13 2020-09-30 13F Merck COM 58933Y105 20,375 -1,737 1,715 646.4456
2020-08-13 2020-06-30 13F Merck COM 58933Y105 22,112 579 2.69 1,710 3.20 0.8161
2020-05-14 2020-03-31 13F Merck COM 58933Y105 21,533 1,179 5.79 1,657 -10.53 0.9501
2020-02-14 2019-12-31 13F Merck COM 58933Y105 20,354 -21 -0.10 1,851 7.93 0.6953
2019-11-14 2019-09-30 13F Merck COM 58933Y105 20,375 -132 -0.64 1,715 -0.23 0.6464
2019-08-13 2019-06-30 13F Merck COM 58933Y105 20,507 -62 -0.30 1,720 0.53 0.6388
2019-05-13 2019-03-31 13F Merck COM 58933Y105 20,569 -152 -0.73 1,711 8.02 0.6403
2019-02-12 2018-12-31 13F Merck COM 58933Y105 20,721 47 0.23 1,583 7.98 0.6539
2018-11-13 2018-09-30 13F Merck COM 58933Y105 20,674 -60 -0.29 1,467 16.53 0.5064
2018-08-14 2018-06-30 13F Merck COM 58933Y105 20,734 -355 -1.68 1,259 9.58 0.4387
2018-05-14 2018-03-31 13F Merck COM 58933Y105 21,089 2,862 15.70 1,149 12.00 0.4303
2018-02-12 2017-12-31 13F Merck COM 58933Y105 18,227 20 0.11 1,026 -12.02 0.3727
2017-11-13 2017-09-30 13F Merck COM 58933Y105 18,207 1,145 6.71 1,166 6.59 0.4304
2017-08-14 2017-06-30 13F Merck COM 58933Y105 17,062 1,585 10.24 1,094 11.19 0.4250
2017-05-12 2017-03-31 13F Merck COM 58933Y105 15,477 -62 -0.40 983 7.55 0.3789
2017-02-13 2016-12-31 13F Merck COM 58933Y105 15,539 -969 -5.87 915 -11.26 0.3557
2016-11-14 2016-09-30 13F Merck COM 58933Y105 16,508 -386 -2.28 1,030 5.86 0.4054
2016-08-09 2016-06-30 13F Merck COM 58933Y105 16,894 -126 -0.74 973 8.11 0.4161
2016-05-16 2016-03-31 13F Merck COM 58933Y105 17,020 -2,069 -10.84 901 -10.71 0.4309
2016-02-11 2015-12-31 13F Merck COM 58933Y105 19,089 -207 -1.07 1,008 5.77 0.4701
2015-11-13 2015-09-30 13F Merck COM 58933Y105 19,296 235 1.23 953 -12.17 0.4102
2015-08-13 2015-06-30 13F Merck COM 58933Y105 19,061 -296 -1.53 1,085 -2.43 0.3959
2015-05-12 2015-03-31 13F Merck COM 58933Y105 19,357 -1,127 -5.50 1,113 -4.39 0.4035
2015-02-12 2014-12-31 13F Merck COM 58933Y105 20,484 -966 -4.50 1,163 -8.50 0.3832
2014-11-12 2014-09-30 13F Merck COM 58933Y105 21,450 2,874 15.47 1,272 18.34 0.3286
2014-08-13 2014-06-30 13F Merck COM 58933Y105 18,576 -596 -3.11 1,075 -1.29 0.2628
2014-05-28 2014-03-31 13F Merck COM 58933Y105 19,172 2,677 16.23 1,088 31.88 0.3015
2014-02-13 2013-12-31 13F Merck COM 58933Y105 16,495 -1,346 -7.54 826 -2.83 0.2400
2013-11-20 2013-09-30 13F/A-1 Merck COM 58933Y105 17,841 -778 -4.18 849 -1.74 0.2692
2013-11-12 2013-09-30 13F Merck COM 58933Y105 17,841 -778 849 251.8549
2013-08-14 2013-06-30 13F Merck CMN STK 58933Y105 18,619 18,619 865 0.2713
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.