Merck & Co., Inc.
MX ˙ BMV ˙ US58933Y1055
SecurityMX:MRK / Merck & Co., Inc.
InstitutionArgent Capital Management Llc
Latest Disclosed Ownership185,453 shares
Latest Disclosed Value $ 22,308,141
Argent Capital Management Llc reports 5,236.78% increase in ownership of MRK / Merck & Co., Inc.

On May 21, 2026 - Argent Capital Management Llc filed a 13F-HR form disclosing ownership of 185,453 shares of Merck & Co., Inc. (MX:MRK) valued at $22,308,141 USD as of March 31, 2026. The entity filed a previous 13F-HR on January 5, 2026 disclosing 3,475 shares of Merck & Co., Inc.. This represents a change in shares of 5,236.78% 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)
2026-05-21 2026-03-31 13F Merck COM 58933Y105 185,453 181,978 5,236.78 22,308 6,011.78 0.7038
2026-01-05 2025-12-31 13F Merck COM 58933Y105 3,475 0 0.00 366 25.43 0.0104
2025-10-14 2025-09-30 13F Merck COM 58933Y105 3,475 0 0.00 292 5.82 0.0080
2025-07-14 2025-06-30 13F Merck COM 58933Y105 3,475 0 0.00 275 -11.58 0.0079
2025-07-14 2025-03-31 13F Merck COM 58933Y105 3,475 -6,965 -66.71 312 -70.04 0.0096
2025-01-14 2024-12-31 13F Merck COM 58933Y105 10,440 0 0.00 1,039 -12.41 0.0293
2024-10-23 2024-09-30 13F Merck COM 58933Y105 10,440 -81 -0.77 1,186 -8.99 0.0328
2024-07-24 2024-06-30 13F Merck COM 58933Y105 10,521 81 0.78 1,302 -5.45 0.0382
2024-04-29 2024-03-31 13F Merck COM 58933Y105 10,440 0 0.00 1,378 21.00 0.0401
2024-02-14 2023-12-31 13F Merck COM 58933Y105 10,440 -84 -0.80 1,138 5.08 0.0372
2023-10-24 2023-09-30 13F Merck COM 58933Y105 10,524 0 0.00 1,083 -10.79 0.0386
2023-07-31 2023-06-30 13F Merck COM 58933Y105 10,524 84 0.80 1,214 9.37 0.0394
2023-05-10 2023-03-31 13F Merck COM 58933Y105 10,440 0 0.00 1,111 -4.15 0.0385
2023-02-03 2022-12-31 13F Merck COM 58933Y105 10,440 0 0.00 1,158 28.81 0.0417
2022-11-09 2022-09-30 13F Merck COM 58933Y105 10,440 0 0.00 899 -5.57 0.0353
2022-08-01 2022-06-30 13F Merck COM 58933Y105 10,440 0 0.00 952 11.09 0.0361
2022-05-11 2022-03-31 13F Merck COM 58933Y105 10,440 0 0.00 857 7.13 0.0270
2022-02-09 2021-12-31 13F Merck COM 58933Y105 10,440 0 0.00 800 2.04 0.0231
2021-11-08 2021-09-30 13F Merck COM 58933Y105 10,440 -478 -4.38 784 -7.66 0.0248
2021-08-10 2021-06-30 13F Merck COM 58933Y105 10,918 4 0.04 849 0.95 0.0265
2021-05-12 2021-03-31 13F Merck COM 58933Y105 10,914 3 0.03 841 -5.72 0.0279
2021-02-10 2020-12-31 13F Merck COM 58933Y105 10,911 3,184 41.21 892 39.16 0.0317
2020-11-10 2020-09-30 13F Merck COM 58933Y105 7,727 3 0.04 641 7.37 0.0245
2020-08-10 2020-06-30 13F Merck COM 58933Y105 7,724 -1,236 -13.79 597 -13.35 0.0250
2020-05-13 2020-03-31 13F Merck COM 58933Y105 8,960 0 0.00 689 -15.46 0.0324
2020-02-10 2019-12-31 13F Merck COM 58933Y105 8,960 0 0.00 815 8.09 0.0279
2019-11-07 2019-09-30 13F Merck COM 58933Y105 8,960 0 0.00 754 0.40 0.0280
2019-08-15 2019-06-30 13F Merck COM 58933Y105 8,960 0 0.00 751 0.81 0.0286
2019-05-10 2019-03-31 13F Merck COM 58933Y105 8,960 0 0.00 745 8.76 0.0273
2019-02-12 2018-12-31 13F Merck COM 58933Y105 8,960 460 5.41 685 13.60 0.0346
2018-11-13 2018-09-30 13F Merck COM 58933Y105 8,500 8,500 603 0.0207
2015-05-11 2015-03-31 13F Merck COM 58933Y105 0 -143,082 -100.00 0 -100.00
2015-02-06 2014-12-31 13F Merck COM 58933Y105 143,082 18,442 14.80 8,126 9.97 0.3909
2014-11-10 2014-09-30 13F Merck COM 58933Y105 124,640 -3,410 -2.66 7,389 -0.26 0.4059
2014-08-12 2014-06-30 13F Merck COM 58933Y105 128,050 -935 -0.72 7,408 1.17 0.3935
2014-05-12 2014-03-31 13F Merck COM 58933Y105 128,985 615 0.48 7,322 13.96 0.4010
2014-02-10 2013-12-31 13F Merck COM 58933Y105 128,370 119,820 1,401.40 6,425 1,478.62 0.3613
2013-11-13 2013-09-30 13F Merck COM 58933Y105 8,550 -1,000 -10.47 407 -8.33 0.0248
2013-08-09 2013-06-30 13F Merck COM 58933Y105 9,550 9,550 444 0.0284
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.