Merck & Co., Inc.
MX ˙ BMV ˙ US58933Y1055
SecurityMX:MRK / Merck & Co., Inc.
InstitutionAmussen Hunsaker Associates Llc
Latest Disclosed Ownership8,070 shares
Latest Disclosed Value $ 970,735
Amussen Hunsaker Associates Llc reports 0.91% increase in ownership of MRK / Merck & Co., Inc.

On May 15, 2026 - Amussen Hunsaker Associates Llc filed a 13F-HR form disclosing ownership of 8,070 shares of Merck & Co., Inc. (MX:MRK) valued at $970,735 USD as of March 31, 2026. The entity filed a previous 13F-HR on February 17, 2026 disclosing 7,997 shares of Merck & Co., Inc.. This represents a change in shares of 0.91% 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)
2026-05-15 2026-03-31 13F MERCK COM 58933Y105 8,070 73 0.91 971 15.34 0.1025
2026-02-17 2025-12-31 13F MERCK COM 58933Y105 7,997 23 0.29 842 25.90 0.0862
2025-11-14 2025-09-30 13F MERCK COM 58933Y105 7,974 10 0.13 669 5.03 0.0683
2025-08-14 2025-06-30 13F MERCK COM 58933Y105 7,964 -7 -0.09 637 -11.91 0.0710
2025-05-27 2025-03-31 13F/A-1 MERCK COM 58933Y105 7,971 -271 -3.29 722 -11.84 0.0995
2025-05-15 2025-03-31 13F MERCK COM 58933Y105 7,971 -271 722 0.1162
2025-02-13 2024-12-31 13F MERCK COM 58933Y105 8,242 20 0.24 820 -12.22 0.1157
2024-11-14 2024-09-30 13F MERCK COM 58933Y105 8,222 5 0.06 934 -8.26 0.1443
2024-08-14 2024-06-30 13F MERCK COM 58933Y105 8,217 6 0.07 1,017 -5.22 0.1678
2024-05-15 2024-03-31 13F MERCK COM 58933Y105 8,211 -177 -2.11 1,073 17.40 0.1908
2024-02-13 2023-12-31 13F MERCK COM 58933Y105 8,388 188 2.29 914 6.90 0.1808
2023-11-13 2023-09-30 13F MERCK COM 58933Y105 8,200 -60 -0.73 855 -10.28 0.1924
2023-08-10 2023-06-30 13F MERCK COM 58933Y105 8,260 8 0.10 953 8.67 0.2061
2023-05-15 2023-03-31 13F MERCK COM 58933Y105 8,252 618 8.10 878 3.54 0.2164
2023-02-08 2022-12-31 13F MERCK COM 58933Y105 7,634 9 0.12 847 28.92 0.2316
2022-11-14 2022-09-30 13F MERCK COM 58933Y105 7,625 -50 -0.65 657 -6.14 0.1839
2022-08-15 2022-06-30 13F MERCK COM 58933Y105 7,675 9 0.12 700 11.46 0.1929
2022-05-11 2022-03-31 13F MERCK COM 58933Y105 7,666 -365 -4.54 628 1.62 0.1435
2022-02-15 2021-12-31 13F/A-1 MERCK COM 58933Y105 8,031 211 2.70 618 5.28 0.1450
2022-02-14 2021-12-31 13F MERCK COM 58933Y105 8,031 211 618 0.1448
2021-11-16 2021-09-30 13F/A-1 MERCK COM 58933Y105 7,820 38 0.49 587 -4.08 0.1591
2021-11-16 2021-09-30 13F MERCK COM 58933Y105 7,820 587
2021-08-17 2021-06-30 13F MERCK COM 58933Y105 7,782 -1 -0.01 612 2.17 0.1721
2021-05-18 2021-03-31 13F MERCK COM 58933Y105 7,783 -29 -0.37 599 -6.26 0.1911
2021-02-17 2020-12-31 13F MERCK & CO. COM 58933Y105 7,812 9 0.12 639 -1.08 0.2357
2020-11-23 2020-09-30 13F/A-1 MERCK & CO. COM 58933Y105 7,803 848 12.19 646 7.31 0.2725
2020-11-16 2020-09-30 13F MERCK & CO. COM 58933Y105 7,803 848 609 283,353.3402
2020-08-17 2020-06-30 13F MERCK & CO. COM 58933Y105 6,955 -737 -9.58 602 1.69 0.2922
2020-05-15 2020-03-31 13F MERCK & CO. COM 58933Y105 7,692 -359 -4.46 592 -19.24 0.4020
2020-02-14 2019-12-31 13F MERCK COM 58933Y105 8,051 762 10.45 733 19.38 0.4185
2019-11-15 2019-09-30 13F MERCK COM 58933Y105 7,289 0 0.00 614 0.49 0.3721
2019-08-20 2019-06-30 13F MERCK COM 58933Y105 7,289 5 0.07 611 0.83 0.4063
2019-05-16 2019-03-31 13F MERCK COM 58933Y105 7,284 1,284 21.40 606 32.31 0.2427
2019-03-05 2018-12-31 13F/A-1 MERCK COM 58933Y105 6,000 -1,029 -14.64 458 -8.22 0.3394
2019-02-16 2018-12-31 13F MERCK COM 58933Y105 6,000 -1,029 458
2018-11-16 2018-09-30 13F MERCK COM 58933Y105 7,029 7,029 499 0.3250
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.