Merck & Co., Inc.
MX ˙ BMV ˙ US58933Y1055
SecurityMX:MRK / Merck & Co., Inc.
InstitutionAndra AP-fonden
Latest Disclosed Ownership364,485 shares
Latest Disclosed Value $ 43,843,901
Andra AP-fonden reports 14.86% decrease in ownership of MRK / Merck & Co., Inc.

On May 8, 2026 - Andra AP-fonden filed a 13F-HR form disclosing ownership of 364,485 shares of Merck & Co., Inc. (MX:MRK) valued at $43,843,901 USD as of March 31, 2026. The entity filed a previous 13F-HR on February 12, 2026 disclosing 428,100 shares of Merck & Co., Inc.. This represents a change in shares of -14.86% 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)
2026-05-08 2026-03-31 13F MERCK COM 58933Y105 364,485 -63,615 -14.86 43,844 -2.70 0.5223
2026-02-12 2025-12-31 13F MERCK COM 58933Y105 428,100 -116,300 -21.36 45,062 -1.38 0.5567
2025-11-12 2025-09-30 13F MERCK COM 58933Y105 544,400 -17,200 -3.06 45,691 2.78 0.5839
2025-08-06 2025-06-30 13F MERCK COM 58933Y105 561,600 -100 -0.02 44,456 -11.83 0.6184
2025-05-13 2025-03-31 13F MERCK COM 58933Y105 561,700 -15,000 -2.60 50,418 -12.12 0.8266
2025-02-07 2024-12-31 13F MERCK COM 58933Y105 576,700 29,400 5.37 57,370 -7.69 0.9189
2024-11-12 2024-09-30 13F MERCK COM 58933Y105 547,300 240,000 78.10 62,151 63.37 0.9153
2024-08-07 2024-06-30 13F MERCK COM 58933Y105 307,300 70,800 29.94 38,044 21.91 0.6392
2024-05-13 2024-03-31 13F MERCK COM 58933Y105 236,500 65,600 38.39 31,206 67.50 0.5540
2024-02-15 2023-12-31 13F MERCK COM 58933Y105 170,900 96,000 128.17 18,632 141.65 0.9866
2023-11-09 2023-09-30 13F MERCK COM 58933Y105 74,900 -11,800 -13.61 7,711 -22.93 0.4546
2023-08-09 2023-06-30 13F MERCK COM 58933Y105 86,700 -66,700 -43.48 10,004 -38.70 0.2531
2023-05-12 2023-03-31 13F MERCK COM 58933Y105 153,400 28,200 22.52 16,320 125,438.46 0.4245
2023-02-13 2022-12-31 13F MERCK COM 58933Y105 125,200 -36,100 -22.38 14 -99.91 0.4210
2022-11-14 2022-09-30 13F MERCK COM 58933Y105 161,300 -6,000 -3.59 13,891 -8.93 0.4552
2022-08-15 2022-06-30 13F MERCK COM 58933Y105 167,300 -16,900 -9.17 15,253 8.05 0.4368
2022-02-15 2021-12-31 13F MERCK COM 58933Y105 184,200 58,800 46.89 14,117 49.88 0.2875
2021-11-12 2021-09-30 13F MERCK COM 58933Y105 125,400 20,100 19.09 9,419 15.02 0.1939
2021-08-16 2021-06-30 13F MERCK COM 58933Y105 105,300 -32,500 -23.58 8,189 -22.91 0.1672
2021-05-17 2021-03-31 13F MERCK & CO. COM 58933Y105 137,800 18,100 15.12 10,623 8.50 0.2342
2021-02-12 2020-12-31 13F MERCK & CO. COM 58933Y105 119,700 21,900 22.39 9,791 20.68 0.2160
2020-11-12 2020-09-30 13F MERCK & CO. COM 58933Y105 97,800 -19,000 -16.27 8,113 -10.17 0.2200
2020-08-06 2020-06-30 13F MERCK & CO. COM 58933Y105 116,800 18,800 19.18 9,032 19.79 0.2628
2020-05-13 2020-03-31 13F MERCK & CO. COM 58933Y105 98,000 6,800 7.46 7,540 -9.10 0.2742
2020-02-10 2019-12-31 13F MERCK COM 58933Y105 91,200 -7,400 -7.51 8,295 -0.06 0.2373
2019-11-19 2019-09-30 13F MERCK COM 58933Y105 98,600 -16,100 -14.04 8,300 -13.70 0.2466
2019-08-15 2019-06-30 13F MERCK COM 58933Y105 114,700 -19,300 -14.40 9,618 -13.70 0.2769
2019-05-14 2019-03-31 13F MERCK COM 58933Y105 134,000 6,800 5.35 11,145 23.50 0.3245
2018-10-16 2018-09-30 13F MERCK COM 58933Y105 127,200 23,100 22.19 9,024 42.81 0.2327
2018-08-17 2018-06-30 13F MERCK COM 58933Y105 104,100 -38,300 -26.90 6,319 -18.54 0.1708
2018-04-10 2018-03-31 13F MERCK COM 58933Y105 142,400 -291,691 -67.20 7,757 -68.24 0.2010
2018-02-14 2017-12-31 13F MERCK COM 58933Y105 434,091 14,617 3.48 24,426 -9.06 0.5545
2017-10-31 2017-09-30 13F MERCK COM 58933Y105 419,474 -1,826 -0.43 26,859 -0.53 0.6287
2017-08-08 2017-06-30 13F MERCK COM 58933Y105 421,300 -16,251 -3.71 27,001 -2.88 0.6683
2017-05-15 2017-03-31 13F MERCK COM 58933Y105 437,551 1,951 0.45 27,802 8.42 0.6522
2017-02-13 2016-12-31 13F MERCK COM 58933Y105 435,600 8,500 1.99 25,644 -3.79 0.7016
2016-11-14 2016-09-30 13F MERCK COM 58933Y105 427,100 10,500 2.52 26,655 11.06 0.7139
2016-08-12 2016-06-30 13F MERCK COM 58933Y105 416,600 6,601 1.61 24,000 10.63 0.6128
2016-05-04 2016-03-31 13F MERCK & CO INC COM 58933Y105 409,999 -36,601 -8.20 21,693 -8.04 0.5678
2016-02-10 2015-12-31 13F MERCK & CO INC COM 58933Y105 446,600 -107,800 -19.44 23,589 -13.85 0.6739
2015-11-12 2015-09-30 13F MERCK & CO INC COM 58933Y105 554,400 5,100 0.93 27,382 -12.44 0.8022
2015-08-13 2015-06-30 13F MERCK & CO INC COM 58933Y105 549,300 -37,900 -6.45 31,272 -7.35 0.9032
2015-05-14 2015-03-31 13F MERCK & CO INC COM 58933Y105 587,200 -214,900 -26.79 33,752 -25.90 0.9557
2015-02-13 2014-12-31 13F MERCK & CO INC COM 58933Y105 802,100 -36,000 -4.30 45,551 -8.32 1.0554
2014-11-12 2014-09-30 13F MERCK & CO INC COM 58933Y105 838,100 29,300 3.62 49,683 6.19 1.1650
2014-07-09 2014-06-30 13F MERCK & CO INC COM 58933Y105 808,800 249,600 44.64 46,789 47.39 1.0258
2014-05-13 2014-03-31 13F MERCK & CO INC COM 58933Y105 559,200 5,100 0.92 31,746 14.47 0.7323
2014-02-05 2013-12-31 13F MERCK & CO INC COM 58933Y105 554,100 -34,900 -5.93 27,733 -1.10 0.6544
2013-11-07 2013-09-30 13F MERCK & CO INC COM 58933Y105 589,000 9,100 1.57 28,042 4.11 0.7150
2013-07-18 2013-06-30 13F MERCK & CO INC COM 58933Y105 579,900 579,900 26,936 0.7008
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.