머크 앤 컴퍼니(Merck & Co., Inc.)
MX ˙ BMV ˙ US58933Y1055
SecurityMX:MRK / Merck & Co., Inc.
InstitutionGreenline Partners, LLC
Latest Disclosed Ownership3,313 shares
Latest Disclosed Value $ 398,521
Greenline Partners, LLC reports 20.23% decrease in ownership of MRK / Merck & Co., Inc.

On May 15, 2026 - Greenline Partners, LLC filed a 13F-HR form disclosing ownership of 3,313 shares of Merck & Co., Inc. (MX:MRK) valued at $398,521 USD as of March 31, 2026. The entity filed a previous 13F-HR on February 17, 2026 disclosing 4,153 shares of Merck & Co., Inc.. This represents a change in shares of -20.23% 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)
2026-05-15 2026-03-31 13F MERCK COM 58933Y105 3,313 -840 -20.23 399 -8.92 0.0423
2026-02-17 2025-12-31 13F MERCK COM 58933Y105 4,153 1,328 47.01 437 84.39 0.0500
2025-11-17 2025-09-30 13F MERCK COM 58933Y105 2,825 -868 -23.50 237 -18.84 0.0288
2025-08-14 2025-06-30 13F MERCK COM 58933Y105 3,693 -10 -0.27 292 -12.05 0.0394
2025-05-15 2025-03-31 13F MERCK COM 58933Y105 3,703 124 3.46 332 -6.74 0.0480
2025-02-14 2024-12-31 13F MERCK COM 58933Y105 3,579 0 0.00 356 -12.32 0.0498
2024-11-14 2024-09-30 13F MERCK COM 58933Y105 3,579 0 0.00 406 -11.16 0.0582
2024-08-13 2024-06-30 13F MERCK COM 58933Y105 3,579 200 5.92 458 2.70 0.0697
2024-05-15 2024-03-31 13F MERCK COM 58933Y105 3,379 0 0.00 446 20.92 0.0711
2024-02-14 2023-12-31 13F MERCK COM 58933Y105 3,379 0 0.00 368 6.05 0.0623
2023-11-06 2023-09-30 13F MERCK COM 58933Y105 3,379 0 0.00 348 -10.80 0.0655
2023-08-14 2023-06-30 13F MERCK COM 58933Y105 3,379 0 0.00 390 8.36 0.0729
2023-05-15 2023-03-31 13F MERCK COM 58933Y105 3,379 0 0.00 359 -4.01 0.0686
2023-02-14 2022-12-31 13F MERCK COM 58933Y105 3,379 0 0.00 375 28.52 0.0740
2022-11-15 2022-09-30 13F MERCK COM 58933Y105 3,379 0 0.00 291 -5.52 0.0663
2022-08-15 2022-06-30 13F MERCK & CO. COM 58933Y105 3,379 0 0.00 308 11.19 0.0665
2022-05-16 2022-03-31 13F MERCK COM 58933Y105 3,379 -1,799 -34.74 277 -30.23 0.0519
2022-02-15 2021-12-31 13F MERCK COM 58933Y105 5,178 0 0.00 397 2.06 0.0748
2021-11-15 2021-09-30 13F MERCK COM 58933Y105 5,178 0 0.00 389 -3.47 0.0813
2021-08-16 2021-06-30 13F MERCK & CO. COM 58933Y105 5,178 0 0.00 403 1.00 0.0825
2021-05-14 2021-03-31 13F MERCK & CO. COM 58933Y105 5,178 -21 -0.40 399 -6.12 0.0874
2021-02-16 2020-12-31 13F MERCK & CO. COM 58933Y105 5,199 21 0.41 425 -1.16 0.0974
2020-11-16 2020-09-30 13F MERCK & CO. COM 58933Y105 5,178 0 0.00 430 7.50 0.1094
2020-08-13 2020-06-30 13F MERCK & CO. COM 58933Y105 5,178 -21,611 -80.67 400 -80.59 0.1058
2020-05-13 2020-03-31 13F MERCK COM 58933Y105 26,789 -8,078 -23.17 2,061 -35.00 0.6675
2020-02-12 2019-12-31 13F MERCK COM 58933Y105 34,867 -20,646 -37.19 3,171 -32.14 0.7976
2019-11-12 2019-09-30 13F MERCK COM 58933Y105 55,513 769 1.40 4,673 1.81 1.3398
2019-08-05 2019-06-30 13F MERCK COM 58933Y105 54,744 -6,314 -10.34 4,590 -9.61 1.4483
2019-05-07 2019-03-31 13F MERCK COM 58933Y105 61,058 93 0.15 5,078 17.63 1.6636
2019-02-11 2018-12-31 13F MERCK COM 58933Y105 60,965 0 0.00 4,317 0.00 1.3529
2018-10-15 2018-09-30 13F MERCK COM 58933Y105 60,965 1,484 2.49 4,317 19.68 1.3529
2018-08-08 2018-06-30 13F MERCK COM 58933Y105 59,481 2,407 4.22 3,607 16.02 1.1819
2018-06-21 2018-03-31 13F MERCK COM 58933Y105 57,074 26,193 84.82 3,109 78.88 1.0331
2018-06-21 2017-12-31 13F MERCK COM 58933Y105 30,881 30,881 1,738 0.5770
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.