Merck & Co., Inc.
MX ˙ BMV ˙ US58933Y1055
SecurityMX:MRK / Merck & Co., Inc.
InstitutionBrooks, Moore & Associates, Inc.
Latest Disclosed Ownership30,769 shares
Latest Disclosed Value $ 3,701,203
Brooks, Moore & Associates, Inc. reports 4.40% decrease in ownership of MRK / Merck & Co., Inc.

On May 15, 2026 - Brooks, Moore & Associates, Inc. filed a 13F-HR form disclosing ownership of 30,769 shares of Merck & Co., Inc. (MX:MRK) valued at $3,701,203 USD as of March 31, 2026. The entity filed a previous 13F-HR on February 17, 2026 disclosing 32,184 shares of Merck & Co., Inc.. This represents a change in shares of -4.40% 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 30,769 -1,415 -4.40 3,701 9.27 1.8558
2026-02-17 2025-12-31 13F MERCK COM 58933Y105 32,184 -15 -0.05 3,388 25.35 1.6651
2025-11-17 2025-09-30 13F MERCK COM 58933Y105 32,199 -14,957 -31.72 2,702 -26.64 1.3699
2025-08-15 2025-06-30 13F MERCK COM 58933Y105 47,156 -425 -0.89 3,684 -13.75 1.9880
2025-05-14 2025-03-31 13F MERCK COM 58933Y105 47,581 -175 -0.37 4,271 -10.11 2.4089
2025-02-14 2024-12-31 13F MERCK COM 58933Y105 47,756 220 0.46 4,751 -12.00 2.8092
2024-11-14 2024-09-30 13F MERCK COM 58933Y105 47,536 406 0.86 5,398 -7.47 3.1883
2024-08-15 2024-06-30 13F MERCK COM 58933Y105 47,130 -395 -0.83 5,835 -6.95 3.7522
2024-05-14 2024-03-31 13F MERCK COM 58933Y105 47,525 -49 -0.10 6,271 20.90 4.0223
2024-02-15 2023-12-31 13F MERCK COM 58933Y105 47,574 -168 -0.35 5,187 129,550.00 3.5649
2023-11-15 2023-09-30 13F MERCK COM 58933Y105 47,742 1,312 2.83 5 -20.00 3.7112
2023-08-15 2023-06-30 13F MERCK COM 58933Y105 46,430 -225 -0.48 5 25.00 3.7706
2023-05-15 2023-03-31 13F MERCK COM 58933Y105 46,655 1,856 4.14 5 0.00 3.5650
2023-02-03 2022-12-31 13F MERCK COM 58933Y105 44,799 -761 -1.67 5 -99.90 3.6303
2022-11-17 2022-09-30 13F MERCK COM 58933Y105 45,560 -577 -1.25 3,924 -6.70 3.1742
2022-08-04 2022-06-30 13F MERCK COM 58933Y105 46,137 -975 -2.07 4,206 8.79 3.0325
2022-05-03 2022-03-31 13F MERCK COM 58933Y105 47,112 -725 -1.52 3,866 5.46 2.3731
2022-02-04 2021-12-31 13F MERCK COM 58933Y105 47,837 -250 -0.52 3,666 1.50 2.1503
2021-11-08 2021-09-30 13F MERCK COM 58933Y105 48,087 75 0.16 3,612 -3.27 2.3634
2021-07-21 2021-06-30 13F MERCK COM 58933Y105 48,012 6,272 15.03 3,734 16.03 2.3821
2021-05-04 2021-03-31 13F MERCK COM 58933Y105 41,740 5,080 13.86 3,218 7.30 2.1806
2021-02-08 2020-12-31 13F MERCK COM 58933Y105 36,660 625 1.73 2,999 0.33 2.3233
2020-11-02 2020-09-30 13F MERCK COM 58933Y105 36,035 -622 -1.70 2,989 5.43 2.5772
2020-08-10 2020-06-30 13F MERCK COM 58933Y105 36,657 1,647 4.70 2,835 5.23 2.6543
2020-04-22 2020-03-31 13F MERCK COM 58933Y105 35,010 -500 -1.41 2,694 -16.59 2.8620
2020-01-30 2019-12-31 13F MERCK COM 58933Y105 35,510 1,153 3.36 3,230 11.69 2.5619
2019-11-06 2019-09-30 13F/A-1 MERCK COM 58933Y105 34,357 565 1.67 2,892 2.08 2.4429
2019-10-25 2019-09-30 13F MERCK COM 58933Y105 34,357 565 2,892 2,442,918.3244
2019-08-09 2019-06-30 13F MERCK COM 58933Y105 33,792 898 2.73 2,833 3.55 2.4334
2019-04-24 2019-03-31 13F MERCK COM 58933Y105 32,894 -565 -1.69 2,736 7.00 2.4964
2019-02-06 2018-12-31 13F MERCK COM 58933Y105 33,459 33,459 2,557 2.5740
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.