Merck & Co., Inc.
MX ˙ BMV ˙ US58933Y1055
SecurityMX:MRK / Merck & Co., Inc.
InstitutionEmpirical Finance, LLC
Latest Disclosed Ownership90,944 shares
Latest Disclosed Value $ 10,939,654
Empirical Finance, LLC reports 0.23% decrease in ownership of MRK / Merck & Co., Inc.

On May 14, 2026 - Empirical Finance, LLC filed a 13F-HR/A form disclosing ownership of 90,944 shares of Merck & Co., Inc. (MX:MRK) valued at $10,939,654 USD as of March 31, 2026. The entity filed a previous 13F-HR on February 12, 2026 disclosing 91,151 shares of Merck & Co., Inc.. This represents a change in shares of -0.23% 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)
2026-05-14 2026-03-31 13F/A-1 MERCK COM 58933Y105 90,944 -207 -0.23 10,940 14.02 0.5140
2026-05-14 2026-03-31 13F MERCK COM 58933Y105 90,944 -207 10,940 0.5140
2026-02-12 2025-12-31 13F MERCK COM 58933Y105 91,151 -5,835 -6.02 9,595 17.86 0.4577
2025-11-13 2025-09-30 13F MERCK COM 58933Y105 96,986 6,356 7.01 8,140 13.47 0.3875
2025-08-11 2025-06-30 13F MERCK COM 58933Y105 90,630 2,552 2.90 7,174 -9.25 0.3756
2025-05-07 2025-03-31 13F MERCK COM 58933Y105 88,078 1,077 1.24 7,906 -8.65 0.4774
2025-01-28 2024-12-31 13F MERCK COM 58933Y105 87,001 -1,157 -1.31 8,655 -13.56 0.5007
2024-11-06 2024-09-30 13F MERCK COM 58933Y105 88,158 1,984 2.30 10,011 -6.16 0.5837
2024-07-30 2024-06-30 13F MERCK COM 58933Y105 86,174 -5,755 -6.26 10,668 -12.05 0.6664
2024-05-06 2024-03-31 13F MERCK COM 58933Y105 91,929 3,067 3.45 12,130 25.22 0.7445
2024-02-14 2023-12-31 13F MERCK COM 58933Y105 88,862 588 0.67 9,688 6.60 0.6755
2023-11-02 2023-09-30 13F MERCK COM 58933Y105 88,274 8,903 11.22 9,088 -0.78 0.6675
2023-07-27 2023-06-30 13F MERCK COM 58933Y105 79,371 8,990 12.77 9,159 22.32 0.7094
2023-04-05 2023-03-31 13F MERCK COM 58933Y105 70,381 3,830 5.75 7,488 1.41 0.7013
2023-02-21 2022-12-31 13F/A-1 MERCK COM 58933Y105 66,551 5,032 8.18 7,384 39.35 0.7645
2023-01-24 2022-12-31 13F MERCK COM 58933Y105 66,551 5,032 7 0.7645
2022-11-04 2022-09-30 13F MERCK COM 58933Y105 61,519 9,996 19.40 5,298 12.80 0.6283
2022-08-01 2022-06-30 13F MERCK COM 58933Y105 51,523 2,747 5.63 4,697 17.37 0.5986
2022-04-21 2022-03-31 13F MERCK COM 58933Y105 48,776 9,907 25.49 4,002 34.34 0.4483
2022-02-04 2021-12-31 13F MERCK COM 58933Y105 38,869 6,847 21.38 2,979 23.87 0.3517
2021-11-12 2021-09-30 13F MERCK COM 58933Y105 32,022 1,779 5.88 2,405 2.25 0.3625
2021-08-10 2021-06-30 13F/A-1 MERCK COM 58933Y105 30,243 4,296 16.56 2,352 10.84 0.3834
2021-08-04 2021-06-30 13F MERCK & CO. COM 58933Y105 25,947 0 2,122 0.3732
2021-05-13 2021-03-31 13F MERCK & CO. COM 58933Y105 25,947 0 0.00 2,122 0.00 0.3732
2021-02-02 2020-12-31 13F MERCK & CO. COM 58933Y105 25,947 4,459 20.75 2,122 19.08 0.3732
2020-10-28 2020-09-30 13F/A-1 MERCK & CO. COM 58933Y105 21,488 4,343 25.33 1,782 34.39 0.3818
2020-10-26 2020-09-30 13F MERCK & CO. COM 58933Y105 6,257 -10,888 527 147,165.1852
2020-07-20 2020-06-30 13F/A-1 MERCK & CO. COM 58933Y105 17,145 2,304 15.52 1,326 16.11 0.3393
2020-07-20 2020-06-30 13F MERCK & CO. COM 58933Y105 12,196 1,326
2020-04-16 2020-03-31 13F MERCK & CO. COM 58933Y105 14,841 5,055 51.66 1,142 28.31 0.3550
2020-01-27 2019-12-31 13F MERCK COM 58933Y105 9,786 3,529 56.40 890 68.88 0.2164
2019-10-30 2019-09-30 13F MERCK COM 58933Y105 6,257 112 1.82 527 2.33 0.1472
2019-07-09 2019-06-30 13F MERCK COM 58933Y105 6,145 -124 -1.98 515 -1.15 0.1411
2019-05-10 2019-03-31 13F MERCK COM 58933Y105 6,269 1,427 29.47 521 40.81 0.1326
2019-01-22 2018-12-31 13F MERCK COM 58933Y105 4,842 -469 -8.83 370 -1.86 0.1097
2018-10-18 2018-09-30 13F MERCK COM 58933Y105 5,311 588 12.45 377 31.36 0.0938
2018-07-09 2018-06-30 13F MERCK COM 58933Y105 4,723 -1,546 -24.66 287 -44.91 0.0727
2019-05-10 2018-03-31 13F MERCK COM 58933Y105 6,269 6,269 521 0.1090
2017-05-11 2017-03-31 13F MERCK COM 58933Y105 0 -1,295 -100.00 0 -100.00
2017-02-13 2016-12-31 13F MERCK COM 58933Y105 1,295 1,295 77 0.0519
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.