Merck & Co., Inc.
DE ˙ XTRA ˙ US58933Y1055
102,78 € ↑2,84 (2,84%)
2026-06-04
DEL PRIS
SecurityDE:6MK / Merck & Co., Inc.
InstitutionPlimoth Trust Co Llc
Latest Disclosed Ownership65,039 shares
Latest Disclosed Value $ 7,823,541
Plimoth Trust Co Llc reports 2.07% decrease in ownership of 6MK / Merck & Co., Inc.

On April 27, 2026 - Plimoth Trust Co Llc filed a 13F-HR form disclosing ownership of 65,039 shares of Merck & Co., Inc. (DE:6MK) valued at $6,777,064 USD as of March 31, 2026. The entity filed a previous 13F-HR on January 27, 2026 disclosing 66,414 shares of Merck & Co., Inc.. This represents a change in shares of -2.07% during the quarter. The current value of the position is $6,684,708 USD.

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)
2026-04-27 2026-03-31 13F Merck Com 58933Y105 65,039 -1,375 -2.07 7,824 11.92 1.7487
2026-01-27 2025-12-31 13F Merck Com 58933Y105 66,414 1,384 2.13 6,991 28.09 1.5576
2025-10-17 2025-09-30 13F Merck Com 58933Y105 65,030 4,691 7.77 5,458 14.26 1.2359
2025-07-22 2025-06-30 13F Merck Com 58933Y105 60,339 5,658 10.35 4,776 -2.69 1.1454
2025-04-21 2025-03-31 13F Merck Com 58933Y105 54,681 6,535 13.57 4,908 2.48 1.2785
2025-01-23 2024-12-31 13F Merck Com 58933Y105 48,146 511 1.07 4,790 -11.46 1.2301
2024-10-21 2024-09-30 13F Merck Com 58933Y105 47,635 1,954 4.28 5,409 -4.35 1.3629
2024-07-23 2024-06-30 13F Merck Com 58933Y105 45,681 -784 -1.69 5,655 -7.76 1.5089
2024-04-18 2024-03-31 13F Merck Com 58933Y105 46,465 -978 -2.06 6,131 18.54 1.6336
2024-01-26 2023-12-31 13F Merck Com 58933Y105 47,443 1,060 2.29 5,172 8.31 1.4925
2023-10-20 2023-09-30 13F Merck Com 58933Y105 46,383 277 0.60 4,775 -10.24 1.4954
2023-07-24 2023-06-30 13F Merck Com 58933Y105 46,106 -643 -1.38 5,320 6.98 1.5915
2023-04-26 2023-03-31 13F Merck Com 58933Y105 46,749 1,107 2.43 4,974 99,360.00 1.5433
2023-01-19 2022-12-31 13F Merck Com 58933Y105 45,642 -111 -0.24 5 -99.87 1.6332
2022-10-18 2022-09-30 13F Merck Com 58933Y105 45,753 -124 -0.27 3,940 -5.79 1.3619
2022-07-15 2022-06-30 13F Merck Com 58933Y105 45,877 16,098 54.06 4,182 71.18 1.3191
2022-04-25 2022-03-31 13F Merck Com 58933Y105 29,779 -156 -0.52 2,443 6.50 0.6490
2022-01-27 2021-12-31 13F Merck Com 58933Y105 29,935 589 2.01 2,294 4.08 0.5816
2021-10-22 2021-09-30 13F Merck Com 58933Y105 29,346 294 1.01 2,204 -2.43 0.6231
2021-07-20 2021-06-30 13F Merck Com 58933Y105 29,052 -2,168 -6.94 2,259 -6.15 0.6340
2021-04-14 2021-03-31 13F Merck Com 58933Y105 31,220 458 1.49 2,407 -4.33 0.7103
2021-01-22 2020-12-31 13F Merck Com 58933Y105 30,762 -6,665 -17.81 2,516 -18.97 0.7857
2020-10-27 2020-09-30 13F Merck Com 58933Y105 37,427 -1,073 -2.79 3,105 4.30 1.0413
2020-07-20 2020-06-30 13F Merck Com 58933Y105 38,500 498 1.31 2,977 1.81 1.0587
2020-04-22 2020-03-31 13F Merck Com 58933Y105 38,002 -289 -0.75 2,924 -16.03 1.2262
2020-01-29 2019-12-31 13F Merck Com 58933Y105 38,291 -370 -0.96 3,482 6.97 1.1261
2019-10-28 2019-09-30 13F Merck Com 58933Y105 38,661 -1,050 -2.64 3,255 -2.25 1.0673
2019-08-05 2019-06-30 13F Merck Com 58933Y105 39,711 -935 -2.30 3,330 -1.51 1.0958
2019-04-19 2019-03-31 13F Merck Com 58933Y105 40,646 -924 -2.22 3,381 6.45 1.1246
2019-01-25 2018-12-31 13F Merck Com 58933Y105 41,570 -1,175 -2.75 3,176 4.75 1.1711
2018-12-13 2018-09-30 13F Merck Com 58933Y105 42,745 -1,110 -2.53 3,032 13.90 0.9826
2018-12-12 2018-06-30 13F Merck Com 58933Y105 43,855 -1,690 -3.71 2,662 7.30 0.9122
2018-12-21 2018-03-31 13F Merck Com 58933Y105 45,545 -200 -0.44 2,481 -3.61 0.8570
2018-12-26 2017-12-31 13F Merck Com 58933Y105 45,745 45,745 2,574 0.9220
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.