Merck & Co., Inc.
MX ˙ BMV ˙ US58933Y1055
SecurityMX:MRK / Merck & Co., Inc.
InstitutionCrescent Grove Advisors, LLC
Latest Disclosed Ownership8,184 shares
Latest Disclosed Value $ 991,353
Crescent Grove Advisors, LLC reports 0.05% increase in ownership of MRK / Merck & Co., Inc.

On May 6, 2026 - Crescent Grove Advisors, LLC filed a 13F-HR form disclosing ownership of 8,184 shares of Merck & Co., Inc. (MX:MRK) valued at $991,353 USD as of March 31, 2026. The entity filed a previous 13F-HR on February 10, 2026 disclosing 8,180 shares of Merck & Co., Inc.. This represents a change in shares of 0.05% 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 COMM 58933Y105 8,184 4 0.05 991 14.17 0.0954
2026-02-10 2025-12-31 13F Merck & Co Inc COMM 58933Y105 8,180 -1,276 -13.49 868 8.50 0.0806
2025-11-13 2025-09-30 13F Merck & Co Inc COMM 58933Y105 9,456 1,155 13.91 800 20.66 0.0759
2025-08-13 2025-06-30 13F Merck & Co Inc COMM 58933Y105 8,301 35 0.42 664 -11.36 0.0643
2025-04-24 2025-03-31 13F Merck & Co Inc COMM 58933Y105 8,266 -557 -6.31 749 -15.38 0.0780
2025-01-21 2024-12-31 13F Merck & Co Inc COMM 58933Y105 8,823 508 6.11 884 -6.95 0.0877
2024-10-30 2024-09-30 13F Merck & Co Inc COMM 58933Y105 8,315 -479 -5.45 951 -13.24 0.0970
2024-07-22 2024-06-30 13F Merck & Co Inc COMM 58933Y105 8,794 -6,113 -41.01 1,096 -44.50 0.1200
2024-04-29 2024-03-31 13F Merck & Co Inc COMM 58933Y105 14,907 3 0.02 1,973 20.60 0.2058
2024-01-30 2023-12-31 13F Merck & Co Inc COMM 58933Y105 14,904 2 0.01 1,636 5.96 0.1824
2023-10-25 2023-09-30 13F Merck & Co Inc COMM 58933Y105 14,902 121 0.82 1,545 -10.02 0.1925
2023-07-13 2023-06-30 13F Merck & Co Inc COMM 58933Y105 14,781 -2,272 -13.32 1,716 -6.13 0.1842
2023-05-03 2023-03-31 13F Merck & Co Inc COMM 58933Y105 17,053 -2,443 -12.53 1,828 -16.03 0.2122
2023-01-12 2022-12-31 13F Merck & Co Inc COMM 58933Y105 19,496 -131 -0.67 2,177 27.76 0.2264
2022-11-08 2022-09-30 13F Merck & Co Inc COMM 58933Y105 19,627 1,708 9.53 1,704 3.52 0.1969
2022-07-20 2022-06-30 13F Merck & Co Inc COMM 58933Y105 17,919 -2,217 -11.01 1,646 -1.20 0.1733
2022-05-04 2022-03-31 13F Merck & Co Inc COMM 58933Y105 20,136 2,927 17.01 1,666 25.26 0.1631
2022-01-24 2021-12-31 13F Merck & Co Inc COMM 58933Y105 17,209 442 2.64 1,330 4.72 0.1248
2021-10-26 2021-09-30 13F Merck & Co Inc COMM 58933Y105 16,767 49 0.29 1,270 -3.13 0.1349
2021-07-26 2021-06-30 13F Merck & Co Inc COMM 58933Y105 16,718 1,490 9.78 1,311 10.82 0.1378
2021-05-07 2021-03-31 13F Merck & Co Inc COMM 58933Y105 15,228 1,010 7.10 1,183 0.94 0.1386
2021-02-01 2020-12-31 13F Merck & Co Inc COMM 58933Y105 14,218 287 2.06 1,172 0.69 0.1531
2020-11-06 2020-09-30 13F Merck & Co Inc COMM 58933Y105 13,931 3 0.02 1,164 7.18 0.2320
2020-08-03 2020-06-30 13F Merck & Co Inc COMM 58933Y105 13,928 34 0.24 1,086 0.84 0.2295
2020-04-27 2020-03-31 13F Merck & Co Inc COMM 58933Y105 13,894 -63 -0.45 1,077 -15.73 0.2395
2020-02-03 2019-12-31 13F Merck & Co Inc COMM 58933Y105 13,957 3 0.02 1,278 8.12 0.2218
2019-10-31 2019-09-30 13F Merck & Co Inc COMM 58933Y105 13,954 -109 -0.78 1,182 -0.42 0.2267
2019-08-06 2019-06-30 13F Merck & Co Inc COMM 58933Y105 14,063 313 2.28 1,187 3.13 0.2237
2019-05-13 2019-03-31 13F Merck & Co Inc COMM 58933Y105 13,750 68 0.50 1,151 9.31 0.2360
2019-01-29 2018-12-31 13F Merck & Co Inc COMM 58933Y105 13,682 77 0.57 1,053 8.33 0.2245
2018-11-05 2018-09-30 13F Merck & Co Inc COMM 58933Y105 13,605 3 0.02 972 16.83 0.2100
2018-07-16 2018-06-30 13F Merck & Co Inc COMM 58933Y105 13,602 3 0.02 832 11.38 0.2063
2018-05-03 2018-03-31 13F Merck & Co Inc COMM 58933Y105 13,599 539 4.13 747 0.81 0.1831
2018-02-06 2017-12-31 13F Merck & Co Inc COMM 58933Y105 13,060 -124 -0.94 741 -12.82 0.1862
2017-11-06 2017-09-30 13F Merck & Co Inc COMM 58933Y105 13,184 -3,725 -22.03 850 -22.16 0.2180
2017-08-02 2017-06-30 13F Merck & Co Inc COMM 58933Y105 16,909 16,909 1,092 0.3148
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.