Merck & Co., Inc.
MX ˙ BMV ˙ US58933Y1055
SecurityMX:MRK / Merck & Co., Inc.
InstitutionPerkins Coie Trust Co
Latest Disclosed Ownership2,970 shares
Latest Disclosed Value $ 357,259
Perkins Coie Trust Co ownership in MRK / Merck & Co., Inc.

On April 15, 2026 - Perkins Coie Trust Co filed a 13F-HR form disclosing ownership of 2,970 shares of Merck & Co., Inc. (MX:MRK) valued at $357,259 USD as of March 31, 2026. The entity filed a previous 13F-HR on January 12, 2026 disclosing 2,970 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)
2026-04-15 2026-03-31 13F MERCK COMMON STOCK 58933Y105 2,970 0 0.00 357 14.42 0.0687
2026-01-12 2025-12-31 13F MERCK COMMON STOCK 58933Y105 2,970 0 0.00 313 25.30 0.0582
2025-10-09 2025-09-30 13F MERCK COMMON STOCK 58933Y105 2,970 -2,908 -49.47 249 -46.45 0.0469
2025-07-10 2025-06-30 13F MERCK COMMON STOCK 58933Y105 5,878 -143 -2.38 465 -13.89 0.0792
2025-04-11 2025-03-31 13F MERCK COMMON STOCK 58933Y105 6,021 136 2.31 540 -7.69 0.1226
2025-01-16 2024-12-31 13F MERCK COMMON STOCK 58933Y105 5,885 0 0.00 585 -12.43 0.1288
2024-10-08 2024-09-30 13F MERCK COMMON STOCK 58933Y105 5,885 -95 -1.59 668 -9.73 0.1482
2024-07-15 2024-06-30 13F MERCK COMMON STOCK 58933Y105 5,980 0 0.00 740 -6.21 0.1721
2024-04-12 2024-03-31 13F MERCK COMMON STOCK 58933Y105 5,980 -43 -0.71 789 20.27 0.1849
2024-01-09 2023-12-31 13F MERCK COMMON STOCK 58933Y105 6,023 -385 -6.01 657 -0.46 0.1658
2023-10-11 2023-09-30 13F MERCK COMMON STOCK 58933Y105 6,408 2,087 48.30 660 32.33 0.1862
2023-07-14 2023-06-30 13F MERCK COMMON STOCK 58933Y105 4,321 -180 -4.00 499 4.18 0.1416
2023-04-13 2023-03-31 13F MERCK COMMON STOCK 58933Y105 4,501 0 0.00 479 -4.21 0.1435
2023-01-18 2022-12-31 13F MERCK COMMON STOCK 58933Y105 4,501 -203 -4.32 499 23.21 0.1596
2022-10-07 2022-09-30 13F MERCK COMMON STOCK 58933Y105 4,704 -928 -16.48 405 -21.05 0.1553
2022-07-08 2022-06-30 13F MERCK COMMON STOCK 58933Y105 5,632 0 0.00 513 11.04 0.1868
2022-04-15 2022-03-31 13F MERCK COMMON STOCK 58933Y105 5,632 0 0.00 462 6.94 0.1434
2022-01-13 2021-12-31 13F MERCK COMMON STOCK 58933Y105 5,632 28 0.50 432 2.61 0.1267
2021-10-13 2021-09-30 13F MERCK COMMON STOCK 58933Y105 5,604 -540 -8.79 421 -11.92 0.1317
2021-07-14 2021-06-30 13F MERCK COMMON STOCK 58933Y105 6,144 22 0.36 478 1.27 0.1471
2021-04-13 2021-03-31 13F MERCK COMMON STOCK 58933Y105 6,122 0 0.00 472 -5.79 0.1573
2021-01-12 2020-12-31 13F MERCK COMMON STOCK 58933Y105 6,122 540 9.67 501 8.21 0.1710
2020-10-13 2020-09-30 13F MERCK COMMON STOCK 58933Y105 5,582 -900 -13.88 463 -7.58 0.1848
2020-07-13 2020-06-30 13F MERCK COMMON STOCK 58933Y105 6,482 -300 -4.42 501 -4.02 0.2061
2020-04-10 2020-03-31 13F MERCK COMMON STOCK 58933Y105 6,782 338 5.25 522 -10.92 0.2658
2020-01-09 2019-12-31 13F MERCK COMMON STOCK 58933Y105 6,444 -790 -10.92 586 -3.78 0.2401
2019-10-11 2019-09-30 13F MERCK COMMON STOCK 58933Y105 7,234 -50 -0.69 609 -0.33 0.2697
2019-07-10 2019-06-30 13F MERCK COMMON STOCK 58933Y105 7,284 500 7.37 611 8.33 0.2776
2019-04-08 2019-03-31 13F MERCK COMMON STOCK 58933Y105 6,784 -1,100 -13.95 564 -6.31 0.2623
2019-01-15 2018-12-31 13F MERCK COMMON STOCK 58933Y105 7,884 0 0.00 602 7.69 0.3152
2018-10-12 2018-09-30 13F MERCK COMMON STOCK 58933Y105 7,884 0 0.00 559 16.70 0.2595
2018-07-17 2018-06-30 13F MERCK COMMON STOCK 58933Y105 7,884 200 2.60 479 14.32 0.2367
2018-04-16 2018-03-31 13F MERCK COMMON STOCK 58933Y105 7,684 0 0.00 419 -3.01 0.2081
2018-01-12 2017-12-31 13F MERCK COMMON STOCK 58933Y105 7,684 0 0.00 432 -12.20 0.2157
2017-10-13 2017-09-30 13F MERCK & CO INC COMMON STOCK 58933Y105 7,684 0 0.00 492 0.00 0.2555
2017-07-10 2017-06-30 13F MERCK & CO INC COMMON STOCK 58933Y105 7,684 1,874 32.25 492 33.33 0.2648
2017-04-11 2017-03-31 13F MERCK & CO INC COMMON STOCK 58933Y105 5,810 0 0.00 369 7.89 0.2169
2017-01-10 2016-12-31 13F MERCK & CO INC COMMON STOCK 58933Y105 5,810 0 0.00 342 -5.79 0.2075
2016-10-11 2016-09-30 13F MERCK & CO INC COMMON STOCK 58933Y105 5,810 0 0.00 363 8.36 0.2302
2016-07-08 2016-06-30 13F MERCK & CO INC COMMON STOCK 58933Y105 5,810 0 0.00 335 9.12 0.2210
2016-04-15 2016-03-31 13F MERCK & CO INC COMMON STOCK 58933Y105 5,810 0 0.00 307 0.00 0.2089
2016-01-12 2015-12-31 13F MERCK & CO INC COMMON STOCK 58933Y105 5,810 0 0.00 307 6.97 0.2301
2015-10-14 2015-09-30 13F MERCK & CO INC COMMON STOCK 58933Y105 5,810 900 18.33 287 2.50 0.2311
2015-07-09 2015-06-30 13F MERCK & CO INC COMMON STOCK 58933Y105 4,910 1,806 58.18 280 57.30 0.2112
2015-04-09 2015-03-31 13F MERCK & CO INC COMMON STOCK 58933Y105 3,104 1,204 63.37 178 64.81 0.1370
2015-01-07 2014-12-31 13F/A-1 MERCK & CO INC COMMON STOCK 58933Y105 1,900 0 0.00 108 -4.42 0.0861
2015-01-06 2014-12-31 13F MERCK & CO INC COMMON STOCK 58933Y105 1,900 113
2014-10-21 2014-09-30 13F MERCK & CO INC COMMON STOCK 58933Y105 1,900 300 18.75 113 21.51 0.0950
2014-07-18 2014-06-30 13F MERCK & CO INC COMMON STOCK 58933Y105 1,600 0 0.00 93 2.20 0.0869
2014-04-14 2014-03-31 13F MERCK & CO INC COMMON STOCK 58933Y105 1,600 0 0.00 91 13.75 0.0878
2014-02-10 2013-12-31 13F MERCK & CO INC COMMON STOCK 58933Y105 1,600 1,600 80 0.0787
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.