Merck & Co., Inc.
MX ˙ BMV ˙ US58933Y1055
SecurityMX:MRK / Merck & Co., Inc.
InstitutionPrinceton Global Asset Management LLC
Latest Disclosed Ownership4,452 shares
Latest Disclosed Value $ 535,544
Princeton Global Asset Management LLC reports 0.13% increase in ownership of MRK / Merck & Co., Inc.

On April 22, 2026 - Princeton Global Asset Management LLC filed a 13F-HR form disclosing ownership of 4,452 shares of Merck & Co., Inc. (MX:MRK) valued at $535,544 USD as of March 31, 2026. The entity filed a previous 13F-HR on January 20, 2026 disclosing 4,446 shares of Merck & Co., Inc.. This represents a change in shares of 0.13% 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)
2026-04-22 2026-03-31 13F MERCK & CO INC COM Stock 58933Y105 4,452 6 0.13 536 14.32 0.0874
2026-01-20 2025-12-31 13F MERCK & CO INC COM Stock 58933Y105 4,446 1,440 47.90 468 85.71 0.0758
2025-10-09 2025-09-30 13F MERCK & CO INC COM Stock 58933Y105 3,006 -390 -11.48 252 -5.97 0.0419
2025-07-30 2025-06-30 13F MERCK & CO INC COM Stock 58933Y105 3,396 -5,998 -63.85 269 -68.21 0.0488
2025-04-11 2025-03-31 13F MERCK & CO INC COM Stock 58933Y105 9,394 -4,093 -30.35 843 -37.14 0.1674
2025-01-24 2024-12-31 13F MERCK & CO INC COM Stock 58933Y105 13,487 -11,095 -45.13 1,342 -51.95 0.2509
2024-10-29 2024-09-30 13F MERCK & CO INC COM Stock 58933Y105 24,582 827 3.48 2,792 -5.07 0.5429
2024-08-12 2024-06-30 13F MERCK & CO INC COM Stock 58933Y105 23,755 7,015 41.91 2,941 33.15 0.6490
2024-04-29 2024-03-31 13F MERCK & CO INC COM Stock 58933Y105 16,740 -469 -2.73 2,209 17.70 0.5255
2024-01-22 2023-12-31 13F MERCK & CO INC COM Stock 58933Y105 17,209 -856 -4.74 1,876 0.91 0.4717
2023-10-27 2023-09-30 13F MERCK & CO INC COM Stock 58933Y105 18,065 -1,090 -5.69 1,860 -15.88 0.5278
2023-08-04 2023-06-30 13F MERCK & CO INC COM Stock 58933Y105 19,155 -16,040 -45.57 2,210 -40.97 0.6459
2023-04-20 2023-03-31 13F MERCK & CO INC COM Stock 58933Y105 35,195 266 0.76 3,744 124,700.00 1.0777
2023-02-06 2022-12-31 13F MERCK & CO INC COM Stock 58933Y105 34,929 -370 -1.05 4 -99.90 1.2547
2022-11-14 2022-09-30 13F MERCK & CO INC COM Stock 58933Y105 35,299 -650 -1.81 3,040 -7.26 1.0599
2022-08-04 2022-06-30 13F MERCK & CO INC COM Stock 58933Y105 35,949 -300 -0.83 3,278 10.22 1.0592
2022-05-06 2022-03-31 13F MERCK & CO INC COM Stock 58933Y105 36,249 -148 -0.41 2,974 6.63 0.8260
2022-02-02 2021-12-31 13F MERCK & CO INC COM Stock 58933Y105 36,397 -176 -0.48 2,789 1.53 0.7809
2021-11-08 2021-09-30 13F/A-1 MERCK & CO INC COM Stock 58933Y105 36,573 -183 -0.50 2,747 -3.92 0.8372
2021-11-03 2021-09-30 13F MERCK & CO INC COM Stock 58933Y105 2,747 -34,009 2,747 0.8372
2021-08-04 2021-06-30 13F MERCK & CO INC COM Stock 58933Y105 36,756 904 2.52 2,859 3.44 0.8709
2021-05-11 2021-03-31 13F MERCK & CO. INC COM Stock 58933Y105 35,852 -21 -0.06 2,764 -5.79 0.8941
2021-02-09 2020-12-31 13F MERCK & CO. INC COM Stock 58933Y105 35,873 8,186 29.57 2,934 27.73 1.0270
2020-10-27 2020-09-30 13F MERCK & CO. INC COM Stock 58933Y105 27,687 -1,449 -4.97 2,297 1.95 0.9270
2020-08-11 2020-06-30 13F MERCK & CO. INC COM Stock 58933Y105 29,136 26,100 859.68 2,253 862.82 0.7030
2020-04-28 2020-03-31 13F MERCK & CO. INC COM Stock 58933Y105 3,036 60 2.02 234 -13.65 0.1036
2020-02-10 2019-12-31 13F MERCK & CO INC COM Stock 58933Y105 2,976 1,449 94.89 271 111.72 0.1096
2019-12-03 2019-09-30 13F MERCK & CO INC COM Stock 58933Y105 1,527 -66 -4.14 128 -4.48 0.0730
2019-09-06 2019-06-30 13F MERCK & CO INC COM Stock 58933Y105 1,593 -454 -22.18 134 -21.18 0.0805
2019-05-23 2019-03-31 13F MERCK & CO INC COM Stock 58933Y105 2,047 600 41.47 170 53.15 0.1164
2019-02-26 2018-12-31 13F MERCK & CO INC COM Stock 58933Y105 1,447 1,447 111 0.0979
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.