Merck & Co., Inc.
MX ˙ BMV ˙ US58933Y1055
SecurityMX:MRK / Merck & Co., Inc.
InstitutionAmeriprise Financial Inc
Latest Disclosed Ownership16,262,708 shares
Latest Disclosed Value $ 1,959,703,194
Ameriprise Financial Inc reports 1.80% increase in ownership of MRK / Merck & Co., Inc.

On May 15, 2026 - Ameriprise Financial Inc filed a 13F-HR form disclosing ownership of 16,262,708 shares of Merck & Co., Inc. (MX:MRK) valued at $1,959,703,194 USD as of March 31, 2026. The entity filed a previous 13F-HR on February 17, 2026 disclosing 15,974,409 shares of Merck & Co., Inc.. This represents a change in shares of 1.80% 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)
2026-05-15 2026-03-31 13F MERCK COM 58933Y105 16,262,708 288,299 1.80 1,959,703 16.43 0.0840
2026-02-17 2025-12-31 13F MERCK COM 58933Y105 15,974,409 40,500 0.25 1,683,103 25.90 0.3804
2025-11-14 2025-09-30 13F MERCK COM 58933Y105 15,933,909 2,735,459 20.73 1,336,877 28.07 0.3071
2025-08-14 2025-06-30 13F MERCK COM 58933Y105 13,198,450 299,561 2.32 1,043,834 -9.79 0.2573
2025-05-14 2025-03-31 13F MERCK COM 58933Y105 12,898,889 -1,065,775 -7.63 1,157,111 -16.69 0.3123
2025-02-14 2024-12-31 13F MERCK COM 58933Y105 13,964,664 -3,200,521 -18.65 1,388,917 -28.71 0.3564
2024-11-14 2024-09-30 13F MERCK COM 58933Y105 17,165,185 540,100 3.25 1,948,272 -5.33 0.4996
2024-08-14 2024-06-30 13F MERCK COM 58933Y105 16,625,085 -346,147 -2.04 2,058,064 -8.16 0.5569
2024-05-15 2024-03-31 13F MERCK COM 58933Y105 16,971,232 557,932 3.40 2,240,857 25.22 0.6167
2024-02-14 2023-12-31 13F MERCK COM 58933Y105 16,413,300 -188,332 -1.13 1,789,582 4.65 0.5358
2023-11-14 2023-09-30 13F MERCK COM 58933Y105 16,601,632 -429,593 -2.52 1,710,078 -13.01 0.5614
2023-08-14 2023-06-30 13F MERCK COM 58933Y105 17,031,225 -293,372 -1.69 1,965,790 6.64 0.6163
2023-05-22 2023-03-31 13F/A-1 MERCK COM 58933Y105 17,324,597 -1,613,717 -8.52 1,843,471 -12.32 0.6045
2023-05-15 2023-03-31 13F MERCHANTS BANCORP COM 58933Y105 17,324,597 -1,613,717 1,843,471 0.1115
2023-02-14 2022-12-31 13F MERCK COM 58933Y105 18,938,314 -218,769 -1.14 2,102,405 27.18 0.7206
2022-11-14 2022-09-30 13F MERCK COM 58933Y105 19,157,083 1,387,491 7.81 1,653,074 2.24 0.6113
2022-08-15 2022-06-30 13F MERCK COM 58933Y105 17,769,592 1,092,307 6.55 1,616,889 19.08 0.5639
2022-05-16 2022-03-31 13F MERCK COM 58933Y105 16,677,285 876,457 5.55 1,357,839 13.13 0.4007
2022-02-14 2021-12-31 13F MERCK COM 58933Y105 15,800,828 2,892,046 22.40 1,200,266 23.73 0.3320
2021-11-15 2021-09-30 13F MERCK COM 58933Y105 12,908,782 -488,272 -3.64 970,066 -6.89 0.3099
2021-08-16 2021-06-30 13F MERCK COM 58933Y105 13,397,054 -2,908,643 -17.84 1,041,863 -17.14 0.3222
2021-05-17 2021-03-31 13F MERCK COM 58933Y105 16,305,697 -1,088,460 -6.26 1,257,363 -11.64 0.4179
2021-02-12 2020-12-31 13F MERCK COM 58933Y105 17,394,157 -1,411,547 -7.51 1,423,041 -8.78 0.5047
2020-11-16 2020-09-30 13F MERCK COM 58933Y105 18,805,704 -3,281,920 -14.86 1,560,015 -8.66 0.6346
2020-08-14 2020-06-30 13F MERCK COM 58933Y105 22,087,624 205,021 0.94 1,707,910 1.46 0.7316
2020-05-15 2020-03-31 13F MERCK COM 58933Y105 21,882,603 3,744,715 20.65 1,683,268 2.02 0.8837
2020-02-14 2019-12-31 13F MERCK COM 58933Y105 18,137,888 423,984 2.39 1,649,860 10.63 0.6858
2019-11-14 2019-09-30 13F MERCK COM 58933Y105 17,713,904 1,818,130 11.44 1,491,372 11.89 0.6683
2019-08-14 2019-06-30 13F MERCK COM 58933Y105 15,895,774 201,738 1.29 1,332,942 2.10 0.5971
2019-05-15 2019-03-31 13F MERCK COM 58933Y105 15,694,036 3,317,160 26.80 1,305,552 38.01 0.6005
2019-02-14 2018-12-31 13F MERCK COM 58933Y105 12,376,876 232,849 1.92 946,011 -5.97 0.4731
2018-11-14 2018-09-30 13F MERCK COM 58933Y105 12,144,027 252,584 2.12 1,006,052 39.33 0.3517
2018-08-14 2018-06-30 13F MERCK COM 58933Y105 11,891,443 -3,386,522 -22.17 722,047 -13.29 0.3195
2018-05-14 2018-03-31 13F MERCK COM 58933Y105 15,277,965 -6,772,715 -30.71 832,685 -32.90 0.3768
2018-02-12 2017-12-31 13F MERCK COM 58933Y105 22,050,680 -1,465,197 -6.23 1,240,955 -17.58 0.5660
2017-11-07 2017-09-30 13F MERCK COM 58933Y105 23,515,877 1,631,013 7.45 1,505,621 7.32 0.7166
2017-08-10 2017-06-30 13F MERCK COM 58933Y105 21,884,864 25,305 0.12 1,402,871 0.96 0.7022
2017-05-05 2017-03-31 13F MERCK COM 58933Y105 21,859,559 -567,334 -2.53 1,389,595 5.28 0.7190
2017-02-03 2016-12-31 13F MERCK COM 58933Y105 22,426,893 -320,821 -1.41 1,319,880 -7.11 0.7207
2016-11-08 2016-09-30 13F MERCK COM 58933Y105 22,747,714 -244,928 -1.07 1,420,857 7.23 0.7959
2016-08-08 2016-06-30 13F MERCK COM 58933Y105 22,992,642 4,468,488 24.12 1,324,996 35.20 0.7765
2016-05-12 2016-03-31 13F MERCK COM 58933Y105 18,524,154 2,472,025 15.40 980,035 15.53 0.5848
2016-02-11 2015-12-31 13F MERCK COM 58933Y105 16,052,129 -2,630,331 -14.08 848,310 -8.05 0.4980
2015-11-12 2015-09-30 13F MERCK COM 58933Y105 18,682,460 -921,408 -4.70 922,609 -17.35 0.5714
2015-08-13 2015-06-30 13F MERCK COM 58933Y105 19,603,868 -3,329,769 -14.52 1,116,221 -15.34 0.6354
2015-05-14 2015-03-31 13F MERCK COM 58933Y105 22,933,637 -1,609,167 -6.56 1,318,476 -5.41 0.7568
2015-02-13 2014-12-31 13F MERCK COM 58933Y105 24,542,804 499,789 2.08 1,393,862 -2.22 0.8123
2014-11-14 2014-09-30 13F MERCK COM 58933Y105 24,043,015 2,703,139 12.67 1,425,449 15.44 0.8576
2014-08-13 2014-06-30 13F MERCK COM 58933Y105 21,339,876 2,055,371 10.66 1,234,771 12.77 0.7285
2014-05-14 2014-03-31 13F MERCK COM 58933Y105 19,284,505 1,635,499 9.27 1,094,977 23.93 0.6575
2014-02-14 2013-12-31 13F MERCK COM 58933Y105 17,649,006 2,847,750 19.24 883,514 25.35 0.5352
2013-11-14 2013-09-30 13F MERCK COM 58933Y105 14,801,256 -3,184,521 -17.71 704,830 -15.65 0.4624
2013-08-14 2013-06-30 13F MERCK COM 58933Y105 17,985,777 17,985,777 835,594 0.5785
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.