Merck & Co., Inc.
MX ˙ BMV ˙ US58933Y1055
SecurityMX:MRK / Merck & Co., Inc.
InstitutionSarasin & Partners LLP
Latest Disclosed Ownership785,691 shares
Latest Disclosed Value $ 94,510,777
Sarasin & Partners LLP reports 14.15% decrease in ownership of MRK / Merck & Co., Inc.

On April 13, 2026 - Sarasin & Partners LLP filed a 13F-HR form disclosing ownership of 785,691 shares of Merck & Co., Inc. (MX:MRK) valued at $94,510,777 USD as of March 31, 2026. The entity filed a previous 13F-HR on January 8, 2026 disclosing 915,194 shares of Merck & Co., Inc.. This represents a change in shares of -14.15% 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)
2026-04-13 2026-03-31 13F MERCK COM 58933Y105 785,691 -129,503 -14.15 94,511 -1.89 1.1530
2026-01-08 2025-12-31 13F MERCK COM 58933Y105 915,194 -32,675 -3.45 96,333 29.34 1.0002
2025-10-10 2025-09-30 13F MERCK COM 58933Y105 947,869 773 0.08 74,484 -0.65 0.7309
2025-07-09 2025-06-30 13F MERCK COM 58933Y105 947,096 20,446 2.21 74,972 -9.86 0.7463
2025-04-15 2025-03-31 13F/A-1 MERCK COM 58933Y105 926,650 38,149 4.29 83,176 -5.90 0.9020
2025-04-09 2025-03-31 13F MERCK COM 58933Y105 1,884,285 995,784 213,979 2.0625
2025-01-16 2024-12-31 13F MERCK COM 58933Y105 888,501 -995,784 -52.85 88,388 -58.69 0.9751
2024-10-09 2024-09-30 13F MERCK COM 58933Y105 1,884,285 -384,077 -16.93 213,979 -23.80 2.0188
2024-07-19 2024-06-30 13F MERCK COM 58933Y105 2,268,362 -539,785 -19.22 280,823 -24.21 2.4876
2024-04-12 2024-03-31 13F MERCK COM 58933Y105 2,808,147 -49,648 -1.74 370,535 18.93 3.6483
2024-01-10 2023-12-31 13F MERCK COM 58933Y105 2,857,795 -439,635 -13.33 311,557 -8.22 3.4252
2023-10-05 2023-09-30 13F MERCK COM 58933Y105 3,297,430 104,812 3.28 339,470 -7.85 4.2399
2023-07-11 2023-06-30 13F MERCK COM 58933Y105 3,192,618 2,000 0.06 368,396 8.53 4.2723
2023-05-08 2023-03-31 13F/A-1 MERCK COM 58933Y105 3,190,618 42,437 1.35 339,450 -2.82 4.2814
2023-04-27 2023-03-31 13F MERCK COM 58933Y105 4,083,627 935,446 327,915 3.0807
2023-01-30 2022-12-31 13F MERCK COM 58933Y105 3,148,181 -506,208 -13.85 349,291 10.99 4.5746
2022-10-18 2022-09-30 13F MERCK COM 58933Y105 3,654,389 -109,832 -2.92 314,716 -8.30 4.3593
2022-07-13 2022-06-30 13F MERCK COM 58933Y105 3,764,221 -1,139,901 -23.24 343,184 -14.71 4.3272
2022-04-11 2022-03-31 13F MERCK & CO. COM 58933Y105 4,904,122 829,901 20.37 402,383 28.87 4.0461
2022-01-19 2021-12-31 13F MERCK COM 58933Y105 4,074,221 333,906 8.93 312,248 11.15 2.8445
2021-10-22 2021-09-30 13F MERCK COM 58933Y105 3,740,315 298,313 8.67 280,935 4.95 2.8351
2021-07-13 2021-06-30 13F MERCK COM 58933Y105 3,442,002 484,963 16.40 267,685 17.43 2.7944
2021-04-29 2021-03-31 13F MERCK & CO. COM 58933Y105 2,957,039 532,984 21.99 227,958 14.96 2.6879
2021-01-19 2020-12-31 13F MERCK & CO. COM 58933Y105 2,424,055 168,014 7.45 198,288 5.96 2.6245
2020-11-09 2020-09-30 13F MERCK & CO. COM 58933Y105 2,256,041 441,331 24.32 187,139 33.35 2.7064
2020-07-17 2020-06-30 13F MERCK & CO. COM 58933Y105 1,814,710 1,489,720 458.39 140,332 461.22 2.2446
2020-04-30 2020-03-31 13F MERCK & CO. COM 58933Y105 324,990 250,299 335.11 25,005 268.10 0.4914
2020-02-12 2019-12-31 13F MERCK COM 58933Y105 74,691 0 0.00 6,793 8.05 0.1038
2019-11-08 2019-09-30 13F MERCK COM 58933Y105 74,691 12,538 20.17 6,287 20.63 0.1040
2019-07-18 2019-06-30 13F MERCK COM 58933Y105 62,153 24,594 65.48 5,212 66.84 0.0911
2019-05-13 2019-03-31 13F MERCK COM 58933Y105 37,559 0 0.00 3,124 8.85 0.0601
2019-02-12 2018-12-31 13F MERCK COM 58933Y105 37,559 -16,714 -30.80 2,870 -25.45 0.0624
2018-11-09 2018-09-30 13F MERCK COM 58933Y105 54,273 54,273 3,850 0.0726
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.