Merck & Co., Inc.
MX ˙ BMV ˙ US58933Y1055
SecurityMX:MRK / Merck & Co., Inc.
InstitutionSummit Global Investments
Latest Disclosed Ownership67,598 shares
Latest Disclosed Value $ 8,131
Summit Global Investments reports 5.15% decrease in ownership of MRK / Merck & Co., Inc.

On May 7, 2026 - Summit Global Investments filed a 13F-HR form disclosing ownership of 67,598 shares of Merck & Co., Inc. (MX:MRK) valued at $8,131 USD as of March 31, 2026. The entity filed a previous 13F-HR on February 17, 2026 disclosing 71,272 shares of Merck & Co., Inc.. This represents a change in shares of -5.15% 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)
2026-05-07 2026-03-31 13F MERCK COM 58933Y105 67,598 -3,674 -5.15 8 14.29 0.4797
2026-02-17 2025-12-31 13F MERCK COM 58933Y105 71,272 -61,360 -46.26 8 -36.36 0.4435
2025-11-03 2025-09-30 13F MERCK COM 58933Y105 132,632 -23,118 -14.84 11 -8.33 0.6502
2025-08-12 2025-06-30 13F MERCK COM 58933Y105 155,750 66,743 74.99 12 71.43 0.7271
2025-04-07 2025-03-31 13F MERCK & CO INC C OM 58933Y105 89,007 -111,017 -55.50 8 -63.16 0.5817
2025-02-11 2024-12-31 13F MERCK & CO INC C OM 58933Y105 200,024 47,355 31.02 20 11.76 1.2448
2024-10-31 2024-09-30 13F MERCK COM 58933Y105 152,669 7,263 4.99 17 -5.56 1.1052
2024-07-22 2024-06-30 13F MERCK & CO INC C OM 58933Y105 145,406 24,859 20.62 18 20.00 1.2145
2024-04-29 2024-03-31 13F MERCK COM 58933Y105 120,547 -84,559 -41.23 16 -31.82 1.1827
2024-02-06 2023-12-31 13F MERCK COM 58933Y105 205,106 38,497 23.11 22 29.41 1.4640
2023-10-16 2023-09-30 13F MERCK & CO INC C OM 58933Y105 166,609 -2,826 -1.67 17 -10.53 1.1422
2023-07-19 2023-06-30 13F MERCK COM 58933Y105 169,435 -5,020 -2.88 20 5.56 1.2942
2023-05-04 2023-03-31 13F MERCK & CO INC C OM 58933Y105 174,455 -28,378 -13.99 19 -18.18 1.4356
2023-01-31 2022-12-31 13F MERCK COM 58933Y105 202,833 -3,691 -1.79 23 -99.88 1.8992
2022-11-14 2022-09-30 13F MERCK COM 58933Y105 206,524 361 0.18 17,786 -5.37 1.6448
2022-08-23 2022-06-30 13F MERCK COM 58933Y105 206,163 -58,698 -22.16 18,796 -13.51 1.6557
2022-04-29 2022-03-31 13F MERCK COM 58933Y105 264,861 113,497 74.98 21,732 87.33 1.6017
2022-02-14 2021-12-31 13F MERCK COM 58933Y105 151,364 50,826 50.55 11,601 53.64 0.7446
2021-11-08 2021-09-30 13F MERCK COM 58933Y105 100,538 -63,382 -38.67 7,551 -40.69 0.5660
2022-01-28 2021-06-30 13F MERCK COM 58933Y105 163,920 -4,491 -2.67 12,731 -1.94 0.7620
2022-01-27 2021-03-31 13F MERCK & CO. COM 58933Y105 168,411 -28,834 -14.62 12,983 -19.54 0.8320
2021-02-11 2020-12-31 13F MERCK COM 58933Y105 197,245 8,736 4.63 16,135 3.18 1.6125
2020-11-16 2020-09-30 13F MERCK & CO. COM 58933Y105 188,509 -2,373 -1.24 15,637 5.93 1.6158
2020-08-11 2020-06-30 13F MERCK & CO. COM 58933Y105 190,882 162,865 581.31 14,761 584.65 1.7030
2020-05-14 2020-03-31 13F MERCK COM 58933Y105 28,017 18,421 191.97 2,156 146.96 0.3143
2020-02-13 2019-12-31 13F MERCK COM 58933Y105 9,596 700 7.87 873 16.56 0.0947
2019-11-08 2019-09-30 13F MERCK COM 58933Y105 8,896 -322 -3.49 749 -3.10 0.0870
2019-08-16 2019-06-30 13F MERCK COM 58933Y105 9,218 9,218 773 0.0972
2018-08-10 2018-06-30 13F MERCK COM 58933Y105 0 -20,083 -100.00 0 -100.00
2018-05-03 2018-03-31 13F MERCK COM 58933Y105 20,083 -506 -2.46 1,094 -5.61 0.1741
2018-02-14 2017-12-31 13F MERCK COM 58933Y105 20,589 -16,449 -44.41 1,159 -51.14 0.1795
2017-11-14 2017-09-30 13F MERCK COM 58933Y105 37,038 14,477 64.17 2,372 64.04 0.3709
2017-08-10 2017-06-30 13F MERCK COM 58933Y105 22,561 -12,779 -36.16 1,446 -35.59 0.4328
2017-05-16 2017-03-31 13F MERCK COM 58933Y105 35,340 9,069 34.52 2,246 45.12 0.7310
2017-02-15 2016-12-31 13F MERCK COM 58933Y105 26,271 26,271 1,547 0.5620
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.