Merck & Co., Inc.
MX ˙ BMV ˙ US58933Y1055
SecurityMX:MRK / Merck & Co., Inc.
InstitutionArgent Advisors, Inc.
Latest Disclosed Ownership24,758 shares
Latest Disclosed Value $ 2,978,140
Argent Advisors, Inc. reports 0.25% decrease in ownership of MRK / Merck & Co., Inc.

On April 24, 2026 - Argent Advisors, Inc. filed a 13F-HR form disclosing ownership of 24,758 shares of Merck & Co., Inc. (MX:MRK) valued at $2,978,140 USD as of March 31, 2026. The entity filed a previous 13F-HR on February 11, 2026 disclosing 24,820 shares of Merck & Co., Inc.. This represents a change in shares of -0.25% 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)
2026-04-24 2026-03-31 13F MERCK & CO INC COM COM 58933Y105 24,758 -62 -0.25 2,978 14.01 0.8132
2026-02-11 2025-12-31 13F MERCK COM 58933Y105 24,820 450 1.85 2,613 27.73 0.7294
2025-11-03 2025-09-30 13F MERCK & CO INC COM COM 58933Y105 24,370 1,387 6.03 2,045 12.42 0.6032
2025-08-07 2025-06-30 13F MERCK COM 58933Y105 22,983 2,380 11.55 1,819 -1.62 0.5624
2025-04-25 2025-03-31 13F MERCK & CO INC COM COM 58933Y105 20,603 4,029 24.31 1,849 12.20 0.6188
2025-02-10 2024-12-31 13F MERCK & CO INC COM COM 58933Y105 16,574 361 2.23 1,649 -10.48 0.6110
2024-11-13 2024-09-30 13F MERCK & CO INC COM COM 58933Y105 16,213 -400 -2.41 1,841 -10.46 0.6843
2024-07-29 2024-06-30 13F MERCK & CO INC COM COM 58933Y105 16,613 25 0.15 2,057 -6.03 0.8171
2024-05-01 2024-03-31 13F MERCK COM 58933Y105 16,588 -100 -0.60 2,189 20.29 0.8658
2024-02-09 2023-12-31 13F MERCK & CO INC COM COM 58933Y105 16,688 -169 -1.00 1,819 4.84 0.7975
2023-11-09 2023-09-30 13F MERCK & CO INC COM COM 58933Y105 16,857 -64 -0.38 1,735 -11.12 0.7935
2023-08-04 2023-06-30 13F MERCK COM 58933Y105 16,921 -231 -1.35 1,953 7.02 0.8954
2023-04-24 2023-03-31 13F MERCK & CO INC COM COM 58933Y105 17,152 -1,019 -5.61 1,825 -9.52 0.8713
2023-02-02 2022-12-31 13F MERCK & CO INC COM COM 58933Y105 18,171 -406 -2.19 2,016 26.00 1.0429
2022-11-08 2022-09-30 13F MERCK & CO INC COM COM 58933Y105 18,577 -222 -1.18 1,600 -6.65 0.9337
2022-08-08 2022-06-30 13F MERCK & CO INC COM COM 58933Y105 18,799 -43 -0.23 1,714 10.87 0.9639
2022-04-26 2022-03-31 13F MERCK & CO INC COM COM 58933Y105 18,842 1,324 7.56 1,546 15.12 0.8284
2022-02-02 2021-12-31 13F MERCK & CO INC COM COM 58933Y105 17,518 156 0.90 1,343 2.99 0.7240
2021-11-05 2021-09-30 13F MERCK & CO INC COM COM 58933Y105 17,362 2,073 13.56 1,304 9.67 0.7473
2021-08-02 2021-06-30 13F MERCK COM 58933Y105 15,289 1,040 7.30 1,189 8.29 0.7224
2021-04-27 2021-03-31 13F MERCK & CO. INC COM COM 58933Y105 14,249 754 5.59 1,098 -0.54 0.7066
2021-02-11 2020-12-31 13F MERCK COM 58933Y105 13,495 1,424 11.80 1,104 10.29 0.6758
2020-10-29 2020-09-30 13F MERCK COM 58933Y105 12,071 360 3.07 1,001 10.61 0.6856
2020-08-11 2020-06-30 13F MERCK COM 58933Y105 11,711 986 9.19 905 9.70 0.6921
2020-04-23 2020-03-31 13F MERCK & CO INC COM COM 58933Y105 10,725 54 0.51 825 -15.38 0.8263
2020-02-14 2019-12-31 13F MERCK & CO INC COM COM 58933Y105 10,671 10,671 975 0.7293
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.