Merck & Co., Inc.
MX ˙ BMV ˙ US58933Y1055
SecurityMX:MRK / Merck & Co., Inc.
InstitutionNorth Star Asset Management Inc
Latest Disclosed Ownership10,951 shares
Latest Disclosed Value $ 1,317,273
North Star Asset Management Inc reports 0.36% increase in ownership of MRK / Merck & Co., Inc.

On May 6, 2026 - North Star Asset Management Inc filed a 13F-HR form disclosing ownership of 10,951 shares of Merck & Co., Inc. (MX:MRK) valued at $1,317,273 USD as of March 31, 2026. The entity filed a previous 13F-HR on February 9, 2026 disclosing 10,912 shares of Merck & Co., Inc.. This represents a change in shares of 0.36% 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.

Upgrade to unlock premium data and export to Excel .

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 COM 58933Y105 10,951 39 0.36 1,317 14.72 0.0343
2026-02-09 2025-12-31 13F MERCK COM 58933Y105 10,912 -930 -7.85 1,149 15.61 0.0463
2025-11-10 2025-09-30 13F MERCK COM 58933Y105 11,842 -154 -1.28 994 4.64 0.0403
2025-08-12 2025-06-30 13F MERCK COM 58933Y105 11,996 192 1.63 950 -10.39 0.0402
2025-05-08 2025-03-31 13F MERCK COM 58933Y105 11,804 426 3.74 1,060 -6.37 0.0483
2025-02-19 2024-12-31 13F MERCK COM 58933Y105 11,378 270 2.43 1,132 -10.31 0.0501
2024-11-14 2024-09-30 13F MERCK COM 58933Y105 11,108 -46 -0.41 1,261 -8.62 0.0566
2024-08-05 2024-06-30 13F MERCK COM 58933Y105 11,154 -144 -1.27 1,381 -7.38 0.0655
2024-05-08 2024-03-31 13F MERCK COM 58933Y105 11,298 -36 -0.32 1,491 20.65 0.0704
2024-02-01 2023-12-31 13F MERCK COM 58933Y105 11,334 -1,260 -10.00 1,236 -4.71 0.0632
2023-10-26 2023-09-30 13F MERCK COM 58933Y105 12,594 11 0.09 1,297 -10.68 0.0744
2023-08-09 2023-06-30 13F MERCK COM 58933Y105 12,583 -175 -1.37 1,452 6.93 0.0801
2023-05-10 2023-03-31 13F MERCK COM 58933Y105 12,758 -71 -0.55 1,357 -4.64 0.0798
2023-03-06 2022-12-31 13F MERCK COM 58933Y105 12,829 1,620 14.45 1,423 47.46 0.0885
2022-11-08 2022-09-30 13F MERCK COM 58933Y105 11,209 57 0.51 965 -5.11 0.0660
2022-07-28 2022-06-30 13F MERCK COM 58933Y105 11,152 -319 -2.78 1,017 8.08 0.0670
2022-04-29 2022-03-31 13F MERCK COM 58933Y105 11,471 -12 -0.10 941 6.93 0.0494
2022-02-07 2021-12-31 13F MERCK COM 58933Y105 11,483 65 0.57 880 2.56 0.0443
2021-10-20 2021-09-30 13F MERCK COM 58933Y105 11,418 155 1.38 858 -2.05 0.0471
2021-07-30 2021-06-30 13F MERCK COM 58933Y105 11,263 -30 -0.27 876 0.57 0.0486
2021-04-29 2021-03-31 13F MERCK COM 58933Y105 11,293 -114 -1.00 871 -6.65 0.0522
2021-02-16 2020-12-31 13F MERCK COM 58933Y105 11,407 -401 -3.40 933 -4.70 0.0589
2020-11-02 2020-09-30 13F MERCK COM 58933Y105 11,808 -92 -0.77 979 6.41 0.0722
2020-07-28 2020-06-30 13F MERCK COM 58933Y105 11,900 1,669 16.31 920 16.90 0.0731
2020-04-24 2020-03-31 13F MERCK COM 58933Y105 10,231 -478 -4.46 787 -19.20 0.0759
2020-02-06 2019-12-31 13F MERCK COM 58933Y105 10,709 -765 -6.67 974 0.83 0.0700
2019-10-25 2019-09-30 13F MERCK COM 58933Y105 11,474 -200 -1.71 966 -1.33 0.0757
2019-08-12 2019-06-30 13F MERCK COM 58933Y105 11,674 481 4.30 979 5.16 0.0764
2019-04-26 2019-03-31 13F MERCK COM 58933Y105 11,193 25 0.22 931 9.14 0.0754
2019-01-29 2018-12-31 13F MERCK COM 58933Y105 11,168 -322 -2.80 853 4.66 0.0808
2018-10-29 2018-09-30 13F MERCK COM 58933Y105 11,490 -275 -2.34 815 14.15 0.0654
2018-08-10 2018-06-30 13F MERCK COM 58933Y105 11,765 -430 -3.53 714 7.53 0.0613
2018-04-27 2018-03-31 13F MERCK COM 58933Y105 12,195 130 1.08 664 -2.21 0.0597
2018-02-01 2017-12-31 13F MERCK COM 58933Y105 12,065 -6,848 -36.21 679 -43.93 0.0609
2017-10-25 2017-09-30 13F/A-1 MERCK COM 58933Y105 18,913 -210 -1.10 1,211 -1.22 0.1204
2017-10-25 2017-09-30 13F MERCK COM 58933Y105 19,150 27 1,217
2017-08-16 2017-06-30 13F MERCK COM 58933Y105 19,123 -27 -0.14 1,226 0.74 0.1248
2017-05-18 2017-03-31 13F MERCK COM 58933Y105 19,150 0 0.00 1,217 7.99 0.1285
2017-01-10 2016-12-31 13F MERCK COM 58933Y105 19,150 -200 -1.03 1,127 -6.71 0.1241
2016-10-05 2016-09-30 13F MERCK COM 58933Y105 19,350 0 0.00 1,208 8.34 0.1362
2016-07-29 2016-06-30 13F/A-1 MERCK COM 58933Y105 19,350 0 0.00 1,115 8.89 0.1300
2016-07-28 2016-06-30 13F MERCK COM 58933Y105 19,350 1,024
2016-05-05 2016-03-31 13F MERCK COM 58933Y105 19,350 -92 -0.47 1,024 -0.29 0.1198
2016-01-28 2015-12-31 13F MERCK COM 58933Y105 19,442 -875 -4.31 1,027 2.39 0.1234
2015-10-28 2015-09-30 13F MERCK COM 58933Y105 20,317 0 0.00 1,003 -13.31 0.1249
2015-07-30 2015-06-30 13F MERCK COM 58933Y105 20,317 0 0.00 1,157 -0.94 0.1315
2015-05-15 2015-03-31 13F MERCK COM 58933Y105 20,317 -100 -0.49 1,168 0.78 0.1323
2015-01-16 2014-12-31 13F MERCK COM 58933Y105 20,417 154 0.76 1,159 -3.50 0.1325
2014-10-28 2014-09-30 13F MERCK COM 58933Y105 20,263 0 0.00 1,201 2.47 0.1432
2014-07-30 2014-06-30 13F MERCK COM 58933Y105 20,263 -300 -1.46 1,172 0.43 0.1366
2014-04-24 2014-03-31 13F MERCK COM 58933Y105 20,563 0 0.00 1,167 13.41 0.1398
2014-02-07 2013-12-31 13F MERCK COM 58933Y105 20,563 -153 -0.74 1,029 4.36 0.1247
2013-10-22 2013-09-30 13F MERCK COM 58933Y105 20,716 -450 -2.13 986 0.31 0.1289
2013-08-06 2013-06-30 13F MERCK COM 58933Y105 21,166 21,166 983 0.1373
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.