Merck & Co., Inc.
MX ˙ BMV ˙ US58933Y1055
SecurityMX:MRK / Merck & Co., Inc.
InstitutionTd Asset Management Inc
Latest Disclosed Ownership2,288,576 shares
Latest Disclosed Value $ 275,292,807
Td Asset Management Inc reports 2.59% increase in ownership of MRK / Merck & Co., Inc.

On May 11, 2026 - Td Asset Management Inc filed a 13F-HR form disclosing ownership of 2,288,576 shares of Merck & Co., Inc. (MX:MRK) valued at $275,292,807 USD as of March 31, 2026. The entity filed a previous 13F-HR on February 10, 2026 disclosing 2,230,821 shares of Merck & Co., Inc.. This represents a change in shares of 2.59% 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)
2026-05-11 2026-03-31 13F MERCK COM 58933Y105 2,288,576 57,755 2.59 275,293 17.24 0.1194
2026-02-10 2025-12-31 13F MERCK COM 58933Y105 2,230,821 152,026 7.31 234,816 34.59 0.1889
2025-11-10 2025-09-30 13F MERCK COM 58933Y105 2,078,795 87,543 4.40 174,473 10.69 0.1417
2025-07-28 2025-06-30 13F MERCK COM 58933Y105 1,991,252 -240,683 -10.78 157,628 -21.32 0.1345
2025-05-07 2025-03-31 13F MERCK COM 58933Y105 2,231,935 -152,254 -6.39 200,338 -15.53 0.1844
2025-02-11 2024-12-31 13F MERCK COM 58933Y105 2,384,189 -122,358 -4.88 237,179 -16.77 0.2098
2024-11-01 2024-09-30 13F MERCK COM 58933Y105 2,506,547 -2,683,806 -51.71 284,969 -55.65 0.2515
2024-08-02 2024-06-30 13F MERCK COM 58933Y105 5,190,353 25,038 0.48 642,566 -5.72 0.5992
2024-05-08 2024-03-31 13F MERCK COM 58933Y105 5,165,315 -222,509 -4.13 681,563 16.03 0.6340
2024-02-12 2023-12-31 13F MERCK COM 58933Y105 5,387,824 360,688 7.17 587,381 13.49 0.5775
2023-10-27 2023-09-30 13F MERCK COM 58933Y105 5,027,136 74,194 1.50 517,544 -9.44 0.6270
2023-08-09 2023-06-30 13F MERCK COM 58933Y105 4,952,942 86,356 1.77 571,520 10.38 0.6509
2023-05-10 2023-03-31 13F MERCK COM 58933Y105 4,866,586 2,374,338 95.27 517,756 87.24 0.6249
2023-02-07 2022-12-31 13F MERCK COM 58933Y105 2,492,248 -143,556 -5.45 276,515 21.08 0.3412
2022-11-07 2022-09-30 13F MERCK COM 58933Y105 2,635,804 -191,234 -6.76 228,366 -11.40 0.2859
2022-08-04 2022-06-30 13F MERCK COM 58933Y105 2,827,038 2,285,934 422.46 257,741 480.52 0.2986
2022-05-10 2022-03-31 13F MERCK COM 58933Y105 541,104 -2,591,482 -82.73 44,398 -81.51 0.0262
2022-05-10 2022-03-31 13F MERCK COM 58933Y105 2,940,528 241,271
2022-02-10 2021-12-31 13F MERCK COM 58933Y105 3,132,586 -55,910 -1.75 240,081 0.25 0.2010
2021-11-09 2021-09-30 13F MERCK COM 58933Y105 3,188,496 134,378 4.40 239,488 2.01 0.2486
2021-08-11 2021-06-30 13F MERCK COM 58933Y105 3,054,118 -454,300 -12.95 234,770 -13.20 0.2383
2021-05-14 2021-03-31 13F MERCK & CO. COM 58933Y105 3,508,418 -1,766,305 -33.49 270,464 -37.32 0.3023
2021-02-16 2020-12-31 13F MERCK & CO. COM 58933Y105 5,274,723 -128,292 -2.37 431,473 -3.73 0.5239
2020-11-10 2020-09-30 13F MERCK & CO. COM 58933Y105 5,403,015 -13,817 -0.26 448,180 6.99 0.6217
2020-08-13 2020-06-30 13F MERCK & CO. COM 58933Y105 5,416,832 940,851 21.02 418,883 21.63 0.5959
2020-05-15 2020-03-31 13F MERCK & CO. COM 58933Y105 4,475,981 128,266 2.95 344,382 -12.91 0.5828
2020-02-11 2019-12-31 13F MERCK COM 58933Y105 4,347,715 226,573 5.50 395,424 13.98 0.5741
2019-11-07 2019-09-30 13F MERCK COM 58933Y105 4,121,142 634,958 18.21 346,918 18.68 0.5303
2019-08-01 2019-06-30 13F MERCK COM 58933Y105 3,486,184 348,378 11.10 292,317 12.01 0.4377
2019-05-08 2019-03-31 13F MERCK COM 58933Y105 3,137,806 257,435 8.94 260,972 18.58 0.3984
2019-02-01 2018-12-31 13F MERCK COM 58933Y105 2,880,371 267,300 10.23 220,089 18.73 0.3828
2018-11-01 2018-09-30 13F MERCK COM 58933Y105 2,613,071 -100,730 -3.71 185,372 12.53 0.2742
2018-07-31 2018-06-30 13F MERCK COM 58933Y105 2,713,801 164,948 6.47 164,728 18.65 0.2510
2018-05-11 2018-03-31 13F MERCK COM 58933Y105 2,548,853 -37,534 -1.45 138,836 -4.60 0.2125
2018-02-02 2017-12-31 13F MERCK COM 58933Y105 2,586,387 20,350 0.79 145,535 -11.42 0.2120
2017-11-09 2017-09-30 13F MERCK COM 58933Y105 2,566,037 -68,855 -2.61 164,304 -2.70 0.2463
2017-08-01 2017-06-30 13F MERCK COM 58933Y105 2,634,892 -48,186 -1.80 168,870 -0.95 0.2661
2017-05-05 2017-03-31 13F MERCK COM 58933Y105 2,683,078 116,342 4.53 170,483 12.82 0.2719
2017-02-08 2016-12-31 13F MERCK COM 58933Y105 2,566,736 -592,672 -18.76 151,104 -23.37 0.2548
2016-11-02 2016-09-30 13F MERCK COM 58933Y105 3,159,408 130,789 4.32 197,178 13.01 0.3412
2016-08-04 2016-06-30 13F MERCK COM 58933Y105 3,028,619 58,047 1.95 174,479 11.01 0.3165
2016-05-05 2016-03-31 13F MERCK & CO INC COM 58933Y105 2,970,572 -226,136 -7.07 157,173 -6.92 0.2939
2016-02-04 2015-12-31 13F MERCK & CO INC COM 58933Y105 3,196,708 -108,609 -3.29 168,851 3.43 0.3350
2015-11-12 2015-09-30 13F MERCK & CO INC COM 58933Y105 3,305,317 37,403 1.14 163,250 -12.25 0.3214
2015-08-11 2015-06-30 13F MERCK & CO INC COM 58933Y105 3,267,914 350,271 12.01 186,043 10.93 0.3322
2015-04-28 2015-03-31 13F MERCK & CO INC COM 58933Y105 2,917,643 2,917,643 0.00 167,706 0.3027
2015-01-30 2014-12-31 13F MERCK & CO INC COM 58933Y105 0 -2,578,365 -100.00 0 -100.00
2014-11-06 2014-09-30 13F MERCK & CO INC COM 58933Y105 2,578,365 58,730 2.33 152,845 4.86 0.2636
2014-08-12 2014-06-30 13F MERCK & CO INC COM 58933Y105 2,519,635 -62,359 -2.42 145,761 -0.56 0.2483
2014-05-09 2014-03-31 13F MERCK & CO INC COM 58933Y105 2,581,994 -964,977 -27.21 146,580 -17.43 0.2666
2014-02-07 2013-12-31 13F MERCK & CO INC COM 58933Y105 3,546,971 75,737 2.18 177,526 7.42 0.3316
2013-11-08 2013-09-30 13F MERCK & CO INC COM 58933Y105 3,471,234 -14,084 -0.40 165,266 2.08 0.3283
2013-07-24 2013-06-30 13F MERCK & CO INC COM 58933Y105 3,485,318 3,485,318 161,893 0.3472
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.