Merck & Co., Inc.
MX ˙ BMV ˙ US58933Y1055
SecurityMX:MRK / Merck & Co., Inc.
InstitutionJag Capital Management, Llc
Latest Disclosed Ownership2,696 shares
Latest Disclosed Value $ 324,302
Jag Capital Management, Llc ownership in MRK / Merck & Co., Inc.

On May 6, 2026 - Jag Capital Management, Llc filed a 13F-HR form disclosing ownership of 2,696 shares of Merck & Co., Inc. (MX:MRK) valued at $324,302 USD as of March 31, 2026. The entity filed a previous 13F-HR on February 6, 2026 disclosing 2,696 shares of Merck & Co., Inc.. This represents a change in shares of 0.00% 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)
2026-05-06 2026-03-31 13F Merck & Co Inc COM 58933Y105 2,696 0 0.00 324 14.49 0.0362
2026-02-06 2025-12-31 13F Merck & Co Inc COM 58933Y105 2,696 0 0.00 284 25.22 0.0308
2025-11-10 2025-09-30 13F Merck & Co Inc COM 58933Y105 2,696 2,696 226 0.0248
2025-04-24 2025-03-31 13F Merck & Co Inc COM 58933Y105 0 -2,196 -100.00 0 -100.00
2025-02-06 2024-12-31 13F Merck & Co Inc COM 58933Y105 2,196 -320 -12.72 218 -23.51 0.0305
2024-11-04 2024-09-30 13F Merck & Co Inc COM 58933Y105 2,516 0 0.00 286 -8.36 0.0345
2024-07-30 2024-06-30 13F Merck & Co Inc COM 58933Y105 2,516 -1,000 -28.44 311 -32.83 0.0427
2024-05-01 2024-03-31 13F Merck & Co Inc COM 58933Y105 3,516 0 0.00 464 20.89 0.0657
2024-02-08 2023-12-31 13F Merck & Co Inc COM 58933Y105 3,516 520 17.36 383 24.35 0.0587
2023-11-15 2023-09-30 13F Merck & Co Inc COM 58933Y105 2,996 0 0.00 308 -10.72 0.0372
2023-09-07 2023-06-30 13F/A-2 Merck & Co Inc COM 58933Y105 2,996 -97 -3.14 346 4.86 0.0400
2023-08-11 2023-06-30 13F Merck & Co Inc COM 58933Y105 2,996 -97 346 0.0399
2023-09-07 2023-03-31 13F/A-2 Merck & Co Inc COM 58933Y105 3,093 -1,413 -31.36 329 -34.07 0.0425
2023-09-01 2023-03-31 13F/A-1 Merck & Co Inc COM 58933Y105 3,093 -1,413 329 0.0417
2023-05-10 2023-03-31 13F Merck & Co Inc COM 58933Y105 3,093 -1,323 329 0.0417
2023-09-07 2022-12-31 13F/A-3 Merck & Co Inc COM 58933Y105 4,506 90 2.04 500 31.32 0.0725
2023-09-01 2022-12-31 13F/A-2 Merck & Co Inc COM 58933Y105 4,506 90 500 0.0707
2023-02-08 2022-12-31 13F Merck & Co Inc COM 58933Y105 4,416 0 490 0.0686
2022-11-14 2022-09-30 13F Merck & Co Inc COM 58933Y105 4,416 0 0.00 380 -5.71 0.0531
2022-08-01 2022-06-30 13F Merck & Co Inc COM 58933Y105 4,416 -43,522 -90.79 403 -89.10 0.0498
2022-05-11 2022-03-31 13F Merck & Co Inc COM 58933Y105 47,938 33,531 232.74 3,696 234.78 0.3656
2022-02-14 2021-12-31 13F Merck & Co Inc COM 58933Y105 14,407 2,783 23.94 1,104 26.46 0.0846
2021-11-01 2021-09-30 13F/A-1 Merck & Co Inc COM 58933Y105 11,624 -38,202 -76.67 873 -77.47 0.0680
2021-10-21 2021-09-30 13F Merck & Co Inc COM 58933Y105 11,624 -38,202 873 0.0396
2021-07-23 2021-06-30 13F Merck & Co Inc COM 58933Y105 49,826 40 0.08 3,875 0.96 0.3040
2021-04-23 2021-03-31 13F Merck & Co Inc COM 58933Y105 49,786 -562 -1.12 3,838 -6.07 0.3390
2021-02-01 2020-12-31 13F Merck & Co Inc COM 58933Y105 50,348 436 0.87 4,086 -1.30 0.3684
2020-10-21 2020-09-30 13F Merck & Co Inc COM 58933Y105 49,912 7 0.01 4,140 7.28 0.4279
2020-07-23 2020-06-30 13F Merck & Co Inc COM 58933Y105 49,905 1,128 2.31 3,859 2.82 0.4508
2020-04-16 2020-03-31 13F Merck & Co Inc COM 58933Y105 48,777 -143,185 -74.59 3,753 -78.50 0.5531
2020-01-27 2019-12-31 13F Merck & Co Inc COM 58933Y105 191,962 176,662 1,154.65 17,459 1,255.51 1.9821
2019-10-24 2019-09-30 13F Merck & Co Inc COM 58933Y105 15,300 1,500 10.87 1,288 11.32 0.1555
2019-07-22 2019-06-30 13F Merck & Co Inc COM 58933Y105 13,800 10,957 385.40 1,157 390.25 0.1306
2019-04-15 2019-03-31 13F Merck & Co Inc COM 58933Y105 2,843 2,843 236 0.0385
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.