Merck & Co., Inc.
MX ˙ BMV ˙ US58933Y1055
SecurityMX:MRK / Merck & Co., Inc.
InstitutionMeritage Portfolio Management
Latest Disclosed Ownership2,003 shares
Latest Disclosed Value $ 210,797
Meritage Portfolio Management ownership in MRK / Merck & Co., Inc.

On January 27, 2026 - Meritage Portfolio Management filed a 13F-HR form disclosing ownership of 2,003 shares of Merck & Co., Inc. (MX:MRK) valued at $210,797 USD as of December 31, 2025. The entity filed a previous 13F-HR on July 25, 2025 disclosing 0 shares of Merck & Co., Inc..

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)
2026-01-27 2025-12-31 13F MERCK COMMON 58933Y105 2,003 2,003 211 0.0140
2025-07-25 2025-06-30 13F MERCK COMMON 58933Y105 0 -2,650 -100.00 0 -100.00
2025-04-28 2025-03-31 13F MERCK COMMON 58933Y105 2,650 -51,572 -95.11 238 -95.61 0.0158
2025-01-27 2024-12-31 13F MERCK COMMON 58933Y105 54,222 18,688 52.59 5,394 134,750.00 0.3347
2024-11-04 2024-09-30 13F MERCK COMMON 58933Y105 35,534 -1,498 -4.05 4 0.00 0.2472
2024-08-09 2024-06-30 13F MERCK COMMON 58933Y105 37,032 -1,399 -3.64 5 -20.00 0.2894
2024-04-29 2024-03-31 13F MERCK COMMON 58933Y105 38,431 -2,103 -5.19 5 25.00 0.3228
2024-02-02 2023-12-31 13F MERCK COMMON 58933Y105 40,534 299 0.74 4 0.00 0.2914
2023-10-30 2023-09-30 13F MERCK COMMON 58933Y105 40,235 -616 -1.51 4 0.00 0.3059
2023-07-31 2023-06-30 13F MERCK COMMON 58933Y105 40,851 1,526 3.88 5 0.00 0.3337
2023-04-25 2023-03-31 13F MERCK COMMON 58933Y105 39,325 890 2.32 4 0.00 0.3132
2023-02-01 2022-12-31 13F MERCK COMMON 58933Y105 38,435 1,681 4.57 4 -99.87 0.3336
2022-10-25 2022-09-30 13F MERCK COMMON 58933Y105 36,754 2,303 6.68 3,165 0.76 0.2622
2022-07-25 2022-06-30 13F MERCK COMMON 58933Y105 34,451 543 1.60 3,141 12.90 0.2437
2022-04-25 2022-03-31 13F MERCK COMMON 58933Y105 33,908 33,908 2,782 0.1722
2022-01-28 2021-12-31 13F MERCK COMMON 58933Y105 0 -2,725 -100.00 0 -100.00
2021-10-26 2021-09-30 13F MERCK COMMON 58933Y105 2,725 -25,088 -90.20 205 -90.52 0.0123
2021-07-26 2021-06-30 13F MERCK COMMON 58933Y105 27,813 25,154 945.99 2,163 955.12 0.1304
2021-04-27 2021-03-31 13F MERCK COMMON 58933Y105 2,659 -21 -0.78 205 -6.39 0.0137
2021-02-03 2020-12-31 13F MERCK COMMON 58933Y105 2,680 -23,929 -89.93 219 -90.08 0.0161
2020-10-26 2020-09-30 13F MERCK COMMON 58933Y105 26,609 -2,884 -9.78 2,207 -3.24 0.1973
2020-07-27 2020-06-30 13F MERCK COMMON 58933Y105 29,493 -16,007 -35.18 2,281 -34.85 0.2193
2020-04-27 2020-03-31 13F MERCK COMMON 58933Y105 45,500 -219 -0.48 3,501 -15.80 0.4753
2020-01-27 2019-12-31 13F MERCK COMMON 58933Y105 45,719 622 1.38 4,158 9.54 0.3657
2019-10-25 2019-09-30 13F MERCK COMMON 58933Y105 45,097 955 2.16 3,796 2.57 0.3602
2019-07-30 2019-06-30 13F MERCK COMMON 58933Y105 44,142 290 0.66 3,701 1.48 0.3769
2019-04-25 2019-03-31 13F MERCK COMMON 58933Y105 43,852 -36,820 -45.64 3,647 -40.83 0.3696
2019-01-25 2018-12-31 13F MERCK COMMON 58933Y105 80,672 -1,531 -1.86 6,164 5.71 0.7033
2018-10-30 2018-09-30 13F MERCK COMMON 58933Y105 82,203 -975 -1.17 5,831 15.49 0.5341
2018-07-25 2018-06-30 13F MERCK & COMMON 58933Y105 83,178 -6,935 -7.70 5,049 2.87 0.4916
2018-04-26 2018-03-31 13F MERCK & COMMON 58933Y105 90,113 100 0.11 4,908 -3.10 0.4739
2018-01-29 2017-12-31 13F MERCK & COMMON 58933Y105 90,013 14,645 19.43 5,065 4.95 0.4852
2017-10-16 2017-09-30 13F MERCK COMMON 58933Y105 75,368 -782 -1.03 4,826 -1.11 0.4733
2017-07-25 2017-06-30 13F MERCK COMMON 58933Y105 76,150 -2,049 -2.62 4,880 -1.79 0.5018
2017-04-25 2017-03-31 13F MERCK COMMON 58933Y105 78,199 -4,092 -4.97 4,969 2.56 0.5212
2017-01-24 2016-12-31 13F MERCK COMMON 58933Y105 82,291 -1,968 -2.34 4,845 -7.87 0.5290
2016-11-08 2016-09-30 13F MERCK COMMON 58933Y105 84,259 405 0.48 5,259 8.88 0.5770
2016-07-20 2016-06-30 13F MERCK COMMON 58933Y105 83,854 -3,760 -4.29 4,830 4.21 0.5429
2016-04-21 2016-03-31 13F MERCK COMMON 58933Y105 87,614 87,614 4,635 0.5242
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.