Merck & Co., Inc.
MX ˙ BMV ˙ US58933Y1055
SecurityMX:MRK / Merck & Co., Inc.
InstitutionAMF Pensionsforsakring AB
Latest Disclosed Ownership15,947 shares
Latest Disclosed Value $ 1,918,265
AMF Pensionsforsakring AB ownership in MRK / Merck & Co., Inc.

On May 4, 2026 - AMF Pensionsforsakring AB filed a 13F-HR form disclosing ownership of 15,947 shares of Merck & Co., Inc. (MX:MRK) valued at $1,918,265 USD as of March 31, 2026. The entity filed a previous 13F-HR on February 6, 2026 disclosing 15,947 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)
2026-05-04 2026-03-31 13F MERCK COM 58933Y105 15,947 0 0.00 1,918 14.30 0.0127
2026-02-06 2025-12-31 13F MERCK COM 58933Y105 15,947 0 0.00 1,679 25.41 0.0104
2025-11-14 2025-09-30 13F/A-1 MERCK COM 58933Y105 15,947 -558,640 -97.22 1,338 -97.07 0.0085
2025-07-22 2025-06-30 13F MERCK COM 58933Y105 574,587 -1,453,467 -71.67 45,685 -74.95 0.3040
2025-05-12 2025-03-31 13F MERCK COM 58933Y105 2,028,054 -813,527 -28.63 182,410 -35.53 1.3466
2025-02-07 2024-12-31 13F MERCK COM 58933Y105 2,841,581 2,039,197 254.14 282,938 210.22 2.0108
2024-10-28 2024-09-30 13F/A-24 MERCK COM 58933Y105 802,384 427,831 114.22 91,205 96.32 0.6521
2024-10-03 2024-09-30 13F MERCK COM 58933Y105 802,384 427,831 91,205 0.6521
2024-07-10 2024-06-30 13F MERCK COM 58933Y105 374,553 -352,000 -48.45 46,458 -51.59 0.3464
2024-04-16 2024-03-31 13F MERCK COM 58933Y105 726,553 25,693 3.67 95,968 25.40 0.7272
2024-01-30 2023-12-31 13F MERCK COM 58933Y105 700,860 -47,895 -6.40 76,533 -0.90 0.6538
2023-10-26 2023-09-30 13F MERCK COM 58933Y105 748,755 -387,978 -34.13 77,229 -41.19 0.7506
2023-07-05 2023-06-30 13F MERCK COM 58933Y105 1,136,733 -148,247 -11.54 131,317 -4.05 1.2088
2023-04-24 2023-03-31 13F MERCK COM 58933Y105 1,284,980 -168,482 -11.59 136,865 -15.21 1.4007
2023-01-26 2022-12-31 13F MERCK COM 58933Y105 1,453,462 27,523 1.93 161,425 31.27 1.8485
2022-10-26 2022-09-30 13F MERCK COM 58933Y105 1,425,939 69,435 5.12 122,968 -0.72 1.4548
2022-07-26 2022-06-30 13F MERCK COM 58933Y105 1,356,504 -438,574 -24.43 123,863 -16.03 1.2158
2022-05-05 2022-03-31 13F MERCK COM 58933Y105 1,795,078 67,515 3.91 147,505 11.14 1.0909
2022-02-08 2021-12-31 13F MERCK COM 58933Y105 1,727,563 -214,366 -11.04 132,724 -9.30 0.9078
2021-11-03 2021-09-30 13F MERCK COM 58933Y105 1,941,929 -1,883,740 -49.24 146,329 -50.89 1.0621
2021-08-11 2021-06-30 13F MERCK COM 58933Y105 3,825,669 1,074,144 39.04 297,939 40.25 2.0561
2021-04-28 2021-03-31 13F MERCK & CO. COM 58933Y105 2,751,525 77,716 2.91 212,428 -2.95 1.5907
2021-02-02 2020-12-31 13F MERCK & CO. COM 58933Y105 2,673,809 298,635 12.57 218,875 11.09 1.7878
2020-11-09 2020-09-30 13F MERCK & CO. COM 58933Y105 2,375,174 217,945 10.10 197,021 18.10 1.7969
2020-08-13 2020-06-30 13F MERCK & CO. COM 58933Y105 2,157,229 -273,612 -11.26 166,819 -10.81 1.7173
2020-04-14 2020-03-31 13F MERCK & CO. COM 58933Y105 2,430,841 -559,691 -18.72 187,029 -31.24 2.3765
2020-02-12 2019-12-31 13F MERCK COM 58933Y105 2,990,532 -14,665 -0.49 271,989 7.52 2.5981
2019-10-29 2019-09-30 13F MERCK COM 58933Y105 3,005,197 -78,239 -2.54 252,977 -2.15 2.5927
2019-07-11 2019-06-30 13F MERCK COM 58933Y105 3,083,436 -260,491 -7.79 258,546 -7.04 2.5066
2019-05-14 2019-03-31 13F MERCK COM 58933Y105 3,343,927 -71,962 -2.11 278,114 6.55 2.7629
2019-01-30 2018-12-31 13F MERCK COM 58933Y105 3,415,889 -227,898 -6.25 261,008 0.97 2.8609
2018-11-14 2018-09-30 13F MERCK COM 58933Y105 3,643,787 884,761 32.07 258,490 54.35 2.3601
2018-08-13 2018-06-30 13F MERCK COM 58933Y105 2,759,026 60,472 2.24 167,473 13.93 1.6159
2018-05-10 2018-03-31 13F MERCK COM 58933Y105 2,698,554 -239,260 -8.14 146,990 -11.08 1.5298
2018-02-13 2017-12-31 13F MERCK COM 58933Y105 2,937,814 124,962 4.44 165,311 -8.22 1.6198
2017-11-08 2017-09-30 13F MERCK COM 58933Y105 2,812,852 -56,380 -1.96 180,107 -1.21 1.9705
2017-07-24 2017-06-30 13F MERCK COM 58933Y105 2,869,232 0 0.00 182,311 0.00 2.0816
2017-04-27 2017-03-31 13F MERCK COM 58933Y105 2,869,232 -81,367 -2.76 182,311 4.96 2.0816
2017-02-14 2016-12-31 13F MERCK COM 58933Y105 2,950,599 590,353 25.01 173,702 17.92 2.0224
2016-11-14 2016-09-30 13F MERCK COM 58933Y105 2,360,246 -65,152 -2.69 147,303 5.42 1.8468
2016-08-12 2016-06-30 13F MERCK COM 58933Y105 2,425,398 13,200 0.55 139,727 9.48 1.7973
2016-05-12 2016-03-31 13F MERCK & CO INC COM 58933Y105 2,412,198 117,238 5.11 127,629 5.29 1.6748
2016-02-16 2015-12-31 13F MERCK & CO INC COM 58933Y105 2,294,960 189,600 9.01 121,220 16.58 1.7032
2015-11-12 2015-09-30 13F MERCK & CO INC COM 58933Y105 2,105,360 -6,000 -0.28 103,984 -13.49 1.5748
2015-08-13 2015-06-30 13F MERCK & CO INC COM 58933Y105 2,111,360 -196,256 -8.50 120,200 -9.38 1.6674
2015-05-13 2015-03-31 13F MERCK & CO INC COM 58933Y105 2,307,616 294,051 14.60 132,642 16.00 1.6663
2015-02-13 2014-12-31 13F MERCK & CO INC COM 58933Y105 2,013,565 2,013,565 114,350 1.4428
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.