Merck & Co., Inc.
MX ˙ BMV ˙ US58933Y1055
SecurityMX:MRK / Merck & Co., Inc.
InstitutionSummit Asset Management, LLC
Latest Disclosed Ownership6,441 shares
Latest Disclosed Value $ 774,788
Summit Asset Management, LLC ownership in MRK / Merck & Co., Inc.

On May 8, 2026 - Summit Asset Management, LLC filed a 13F-HR form disclosing ownership of 6,441 shares of Merck & Co., Inc. (MX:MRK) valued at $774,788 USD as of March 31, 2026. The entity filed a previous 13F-HR on February 9, 2026 disclosing 6,441 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)
2026-05-08 2026-03-31 13F MERCK COM 58933Y105 6,441 0 0.00 775 14.33 0.1078
2026-02-09 2025-12-31 13F MERCK COM 58933Y105 6,441 73 1.15 678 26.78 0.0959
2025-11-06 2025-09-30 13F MERCK COM 58933Y105 6,368 0 0.00 534 5.95 0.0822
2025-08-07 2025-06-30 13F MERCK COM 58933Y105 6,368 -200 -3.05 504 -14.43 0.0821
2025-05-06 2025-03-31 13F MERCK COM 58933Y105 6,568 0 0.00 590 -9.80 0.1020
2025-02-04 2024-12-31 13F MERCK COM 58933Y105 6,568 0 0.00 653 -12.35 0.1148
2024-11-06 2024-09-30 13F MERCK COM 58933Y105 6,568 0 0.00 746 -8.36 0.1401
2024-08-05 2024-06-30 13F MERCK COM 58933Y105 6,568 1,057 19.18 813 11.83 0.1683
2024-05-06 2024-03-31 13F MERCK COM 58933Y105 5,511 0 0.00 727 21.17 0.1560
2024-02-06 2023-12-31 13F MERCK COM 58933Y105 5,511 -393 -6.66 601 -1.15 0.1437
2023-11-06 2023-09-30 13F MERCK COM 58933Y105 5,904 230 4.05 608 -7.19 0.1650
2023-08-07 2023-06-30 13F MERCK COM 58933Y105 5,674 0 0.00 655 8.46 0.1726
2023-05-12 2023-03-31 13F MERCK COM 58933Y105 5,674 304 5.66 604 1.34 0.1661
2023-02-13 2022-12-31 13F MERCK COM 58933Y105 5,370 -133 -2.42 596 25.53 0.1724
2022-11-07 2022-09-30 13F MERCK COM 58933Y105 5,503 50 0.92 474 -4.63 0.1532
2022-08-10 2022-06-30 13F MERCK COM 58933Y105 5,453 50 0.93 497 12.19 0.1538
2022-05-09 2022-03-31 13F MERCK COM 58933Y105 5,403 290 5.67 443 13.01 0.1272
2022-02-11 2021-12-31 13F MERCK COM 58933Y105 5,113 101 2.02 392 4.26 0.1112
2021-11-08 2021-09-30 13F MERCK COM 58933Y105 5,012 55 1.11 376 -2.59 0.1178
2021-08-06 2021-06-30 13F MERCK COM 58933Y105 4,957 -122 -2.40 386 -1.53 0.1213
2021-05-07 2021-03-31 13F MERCK & CO. COM 58933Y105 5,079 -74 -1.44 392 -7.11 0.1331
2021-02-09 2020-12-31 13F MERCK & CO. COM 58933Y105 5,153 181 3.64 422 2.43 0.1541
2020-11-06 2020-09-30 13F MERCK & CO. COM 58933Y105 4,972 2,138 75.44 412 88.13 0.1707
2020-08-07 2020-06-30 13F MERCK & CO. COM 58933Y105 2,834 146 5.43 219 5.80 0.0997
2020-05-08 2020-03-31 13F MERCK & CO. COM 58933Y105 2,688 -300 -10.04 207 -23.90 0.1116
2020-02-07 2019-12-31 13F MERCK COM 58933Y105 2,988 200 7.17 272 15.74 0.1160
2019-11-06 2019-09-30 13F MERCK COM 58933Y105 2,788 0 0.00 235 0.43 0.1094
2019-08-07 2019-06-30 13F MERCK COM 58933Y105 2,788 20 0.72 234 1.74 0.1109
2019-05-07 2019-03-31 13F MERCK COM 58933Y105 2,768 0 0.00 230 8.49 0.1132
2019-02-07 2018-12-31 13F MERCK COM 58933Y105 2,768 -65 -2.29 212 5.47 0.1200
2018-11-06 2018-09-30 13F MERCK COM 58933Y105 2,833 2,833 201 0.0931
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.