Merck & Co., Inc.
BG ˙ BUL ˙ US58933Y1055
SecurityBG:6MK / Merck & Co., Inc.
InstitutionAPG Asset Management N.V.
Latest Disclosed Ownership1,708,121 shares
Latest Disclosed Value $ 178,328,307
APG Asset Management N.V. reports 3.34% increase in ownership of 6MK / Merck & Co., Inc.

On May 13, 2026 - APG Asset Management N.V. filed a 13F-HR form disclosing ownership of 1,708,121 shares of Merck & Co., Inc. (BG:6MK) valued at $178,328,307 USD as of March 31, 2026. The entity filed a previous 13F-HR on February 12, 2026 disclosing 1,652,949 shares of Merck & Co., Inc.. This represents a change in shares of 3.34% 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)
2026-05-13 2026-03-31 13F MERCK COM 58933Y105 1,708,121 55,172 3.34 178,328 20.37 0.5650
2026-02-12 2025-12-31 13F MERCK COM 58933Y105 1,652,949 -127,879 -7.18 148,145 16.46 0.4205
2025-11-12 2025-09-30 13F MERCK COM 58933Y105 1,780,828 -120,916 -6.36 127,204 -0.81 0.3570
2025-08-12 2025-06-30 13F MERCK COM 58933Y105 1,901,744 -783,449 -29.18 128,246 -42.52 0.3798
2025-05-14 2025-03-31 13F MERCK COM 58933Y105 2,685,193 29,698 1.12 223,128 -12.54 0.6921
2025-02-13 2024-12-31 13F MERCK COM 58933Y105 2,655,495 1,996,433 302.92 255,112 280.42 0.7106
2024-11-14 2024-09-30 13F MERCK COM 58933Y105 659,062 -2,334,390 -77.98 67,061 -80.61 0.4451
2024-08-14 2024-06-30 13F MERCK COM 58933Y105 2,993,452 -288,788 -8.80 345,780 -13.77 0.6169
2024-05-14 2024-03-31 13F MERCK COM 58933Y105 3,282,240 -108,747 -3.21 401,011 19.83 0.7025
2024-02-13 2023-12-31 13F MERCK COM 58933Y105 3,390,987 195,181 6.11 334,663 1.72 0.6528
2023-11-14 2023-09-30 13F MERCK COM 58933Y105 3,195,806 -502,344 -13.58 329,008 -15.88 0.6728
2023-08-14 2023-06-30 13F MERCK COM 58933Y105 3,698,150 -130,867 -3.42 391,136 4.32 0.7889
2023-05-12 2023-03-31 13F MERCK COM 58933Y105 3,829,017 -308,535 -7.46 374,954 81,589.32 0.7956
2023-02-14 2022-12-31 13F MERCK COM 58933Y105 4,137,552 2,114,519 104.52 459 -99.74 0.8727
2022-11-14 2022-09-30 13F MERCK COM 58933Y105 2,023,033 -750,181 -27.05 177,843 -26.46 0.4588
2022-08-12 2022-06-30 13F MERCK COM 58933Y105 2,773,214 -54,310 -1.92 241,842 15.99 0.5668
2022-05-12 2022-03-31 13F MERCK COM 58933Y105 2,827,524 -236,940 -7.73 208,510 0.96 0.3940
2022-02-11 2021-12-31 13F MERCK COM 58933Y105 3,064,464 14,573 0.48 206,525 4.49 0.3509
2021-11-15 2021-09-30 13F/A-1 MERCK COM 58933Y105 3,049,891 -181,500 -5.62 197,659 -6.73 0.3513
2021-11-15 2021-09-30 13F MERCK COM 58933Y105 3,049,891 -181,500 197,659 0.3552
2021-08-13 2021-06-30 13F MERCK COM 58933Y105 3,231,391 -174,411 -5.12 211,911 -5.14 0.3599
2021-05-14 2021-03-31 13F MERCK & CO. COM 58933Y105 3,405,802 -997,993 -22.66 223,393 -24.12 0.3813
2021-02-12 2020-12-31 13F MERCK & CO. COM 58933Y105 4,403,795 362,473 8.97 294,414 2.99 0.4802
2020-11-12 2020-09-30 13F MERCK & CO. COM 58933Y105 4,041,322 -261,165 -6.07 285,872 -3.50 0.4948
2020-08-14 2020-06-30 13F MERCK & CO. COM 58933Y105 4,302,487 56,056 1.32 296,231 -9.33 0.5399
2020-05-19 2020-03-31 13F/A-2 MERCK & CO. COM 58933Y105 4,246,431 -1,954,450 -31.52 326,720 -34.97 0.6404
2020-05-15 2020-03-31 13F/A-1 MERCK & CO. COM 58933Y105 4,246,431 0 326,720 0.6470
2020-05-14 2020-03-31 13F MERCK & CO. COM 58933Y105 5,487,915 -712,966 406,492 760,531.2545
2020-02-13 2019-12-31 13F MERCK COM 58933Y105 6,200,881 -885,034 -12.49 502,423 -8.17 0.8163
2019-11-08 2019-09-30 13F MERCK COM 58933Y105 7,085,915 -141,700 -1.96 547,140 2.81 0.9012
2019-08-13 2019-06-30 13F MERCK COM 58933Y105 7,227,615 1,739,700 31.70 532,170 30.92 0.9130
2019-05-14 2019-03-31 13F MERCK COM 58933Y105 5,487,915 1,695,400 44.70 406,492 60.35 0.7461
2019-02-19 2018-12-31 13F/A-1 MERCK COM 58933Y105 3,792,515 2,902,600 326.17 253,498 366.39 0.5153
2019-02-13 2018-12-31 13F MERCK COM 58933Y105 3,792,515 2,902,600 253,498
2018-11-09 2018-09-30 13F MERCK COM 58933Y105 889,915 2,600 0.29 54,353 17.82 0.0952
2018-08-13 2018-06-30 13F MERCK COM 58933Y105 887,315 -109,000 -10.94 46,131 4.54 0.0848
2018-05-14 2018-03-31 13F MERCK COM 58933Y105 996,315 4,000 0.40 44,127 -5.10 0.0853
2018-02-21 2017-12-31 13F/A-1 MERCK COM 58933Y105 992,315 -4,768,680 -82.78 46,500 -87.39 0.0851
2018-01-24 2017-12-31 13F MERCK COM 58933Y105 992,315 -4,768,680 46,500
2017-10-19 2017-09-30 13F MERCK COM 58933Y105 5,760,995 -481,100 -7.71 368,877 -7.79 0.6074
2017-07-21 2017-06-30 13F MERCK COM 58933Y105 6,242,095 -1,185,262 -15.96 400,056 -15.23 0.7266
2017-05-01 2017-03-31 13F MERCK COM 58933Y105 7,427,357 -948,809 -11.33 471,934 0.95 0.8648
2017-01-30 2016-12-31 13F MERCK COM 58933Y105 8,376,166 -231,400 -2.69 467,509 -12.97 0.8792
2016-10-31 2016-09-30 13F MERCK COM 58933Y105 8,607,566 1,037,200 13.70 537,198 23.17 0.9439
2016-08-11 2016-06-30 13F MERCK COM 58933Y105 7,570,366 613,100 8.81 436,129 18.48 0.8208
2016-05-16 2016-03-31 13F MERCK & CO INC COM 58933Y105 6,957,266 804,095 13.07 368,109 13.26 0.7637
2016-02-17 2015-12-31 13F/A-1 MERCK & CO INC COM 58933Y105 6,153,171 -933,237 -13.17 325,010 -7.14 0.7485
2016-02-16 2015-12-31 13F MERCK & CO INC COM 58933Y105 425,323 325,010
2015-11-12 2015-09-30 13F MERCK & CO INC COM 58933Y105 7,086,408 -205,841 -2.82 349,998 -15.69 0.8015
2015-08-12 2015-06-30 13F MERCK & CO INC COM 58933Y105 7,292,249 -12,355 -0.17 415,148 -1.12 0.8328
2015-05-14 2015-03-31 13F MERCK & CO INC COM 58933Y105 7,304,604 -974,583 -11.77 419,869 -10.70 0.8679
2015-02-09 2014-12-31 13F MERCK & CO INC COM 58933Y105 8,279,187 -486,747 -5.55 470,175 -9.52 0.9013
2014-11-12 2014-09-30 13F MERCK & CO INC COM 58933Y105 8,765,934 337,383 4.00 519,645 6.57 1.0507
2014-08-11 2014-06-30 13F MERCK & CO INC COM 58933Y105 8,428,551 1,088,021 14.82 487,592 17.01 1.0410
2014-04-30 2014-03-31 13F MERCK & CO INC COM 58933Y105 7,340,530 140,705 1.95 416,722 15.64 1.0888
2014-02-20 2013-12-31 13F/A-1 MERCK & CO INC COM 58933Y105 7,199,825 2,166,476 43.04 360,351 50.37 1.0593
2014-02-12 2013-12-31 13F MERCK & CO INC COM 58933Y105 7,199,825 360,351
2013-11-13 2013-09-30 13F MERCK & CO INC COM 58933Y105 5,033,349 991,058 24.52 239,638 27.63 0.7570
2013-08-14 2013-06-30 13F MERCK & CO INC COM 58933Y105 4,042,291 4,042,291 187,764 0.5862
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.