Merck & Co., Inc.
MX ˙ BMV ˙ US58933Y1055
SecurityMX:MRK / Merck & Co., Inc.
InstitutionVictory Capital Management Inc
Latest Disclosed Ownership3,789,757 shares
Latest Disclosed Value $ 455,869,869
Victory Capital Management Inc reports 21.19% decrease in ownership of MRK / Merck & Co., Inc.

On May 15, 2026 - Victory Capital Management Inc filed a 13F-HR form disclosing ownership of 3,789,757 shares of Merck & Co., Inc. (MX:MRK) valued at $455,869,869 USD as of March 31, 2026. The entity filed a previous 13F-HR on February 13, 2026 disclosing 4,808,527 shares of Merck & Co., Inc.. This represents a change in shares of -21.19% 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 3,789,757 -1,018,770 -21.19 455,870 -9.93 0.2189
2026-02-13 2025-12-31 13F MERCK COM 58933Y105 4,808,527 75,204 1.59 506,146 27.41 0.2856
2025-11-12 2025-09-30 13F MERCK COM 58933Y105 4,733,323 301,155 6.79 397,268 13.22 0.2323
2025-08-13 2025-06-30 13F MERCK COM 58933Y105 4,432,168 -34,832 -0.78 350,868 -12.49 0.2263
2025-05-02 2025-03-31 13F MERCK COM 58933Y105 4,467,000 1,121,878 33.54 400,958 20.49 0.4102
2025-02-06 2024-12-31 13F MERCK COM 58933Y105 3,345,122 371,758 12.50 332,773 -1.45 0.3271
2024-11-05 2024-09-30 13F MERCK COM 58933Y105 2,973,364 150,873 5.35 337,655 -3.37 0.3253
2024-08-05 2024-06-30 13F MERCK COM 58933Y105 2,822,491 -7,355 -0.26 349,424 -6.42 0.3503
2024-05-03 2024-03-31 13F MERCK COM 58933Y105 2,829,846 -65,119 -2.25 373,398 18.31 0.3645
2024-02-05 2023-12-31 13F MERCK COM 58933Y105 2,894,965 327,286 12.75 315,609 19.39 0.3320
2023-11-06 2023-09-30 13F MERCK COM 58933Y105 2,567,679 16,251 0.64 264,343 -10.21 0.3039
2023-07-27 2023-06-30 13F MERCK COM 58933Y105 2,551,428 -224,688 -8.09 294,409 -0.32 0.3238
2023-05-02 2023-03-31 13F MERCK COM 58933Y105 2,776,116 -1,105,479 -28.48 295,351 -31.42 0.3317
2023-04-25 2022-12-31 13F/A-3 MERCK COM 58933Y105 3,881,595 -82,691 -2.09 430,663 26.14 0.4955
2023-03-10 2022-12-31 13F/A-2 MERCK COM 58933Y105 3,881,595 -82,691 430,663 0.4702
2023-02-10 2022-12-31 13F/A-1 MERCK COM 58933Y105 3,881,595 -82,691 430,663 0.0003
2023-02-09 2022-12-31 13F MERCK COM 58933Y105 3,734,727 -229,559 403,087 0.2738
2022-11-02 2022-09-30 13F MERCK COM 58933Y105 3,964,286 545,018 15.94 341,404 9.52 0.3984
2022-08-01 2022-06-30 13F MERCK COM 58933Y105 3,419,268 -67,060 -1.92 311,735 2.03 0.3552
2022-05-04 2022-03-31 13F MERCK COM 58933Y105 3,486,328 668,123 23.71 305,526 41.46 0.3057
2022-02-07 2021-12-31 13F MERCK COM 58933Y105 2,818,205 48,130 1.74 215,987 3.81 0.1987
2021-11-02 2021-09-30 13F MERCK COM 58933Y105 2,770,075 59,679 2.20 208,060 -1.29 0.2037
2021-08-03 2021-06-30 13F MERCK COM 58933Y105 2,710,396 756,208 38.70 210,787 39.92 0.2024
2021-05-04 2021-03-31 13F MERCK & CO. COM 58933Y105 1,954,188 -66,913 -3.31 150,648 -8.88 0.1544
2021-02-01 2020-12-31 13F MERCK & CO. COM 58933Y105 2,021,101 -163,036 -7.46 165,326 -8.75 0.1842
2020-11-09 2020-09-30 13F Merck COM 58933Y105 2,184,137 42,724 2.00 181,174 9.41 0.2325
2020-08-07 2020-06-30 13F MERCK & CO. COM 58933Y105 2,141,413 -1,031,259 -32.50 165,595 -32.16 0.2243
2020-05-12 2020-03-31 13F/A-1 MERCK & CO. COM 58933Y105 3,172,672 -835,659 -20.85 244,105 -33.04 0.4093
2020-05-04 2020-03-31 13F MERCK & CO. COM 58933Y105 3,172,672 -835,659 244,105 267,148.1173
2020-02-06 2019-12-31 13F/A-1 MERCK COM 58933Y105 4,008,331 -327,182 -7.55 364,558 -0.11 0.4426
2020-02-04 2019-12-31 13F MERCK COM 58933Y105 3,083,572 -1,251,941 263,460 315,807.0377
2019-11-12 2019-09-30 13F MERCK COM 58933Y105 4,335,513 3,775,935 674.78 364,963 677.82 0.4696
2019-08-15 2019-06-30 13F MERCK COM 58933Y105 559,578 389,383 228.79 46,921 231.48 0.0946
2019-05-03 2019-03-31 13F MERCK CS 58933Y105 170,195 49,800 41.36 14,155 53.88 0.0322
2019-05-02 2018-12-31 13F/A-1 MERCK COM 58933Y105 120,395 -53,468 -30.75 9,199 -25.42 0.0231
2019-02-05 2018-12-31 13F MERCK COM 58933Y105 119,760 -54,103 9,151
2018-11-01 2018-09-30 13F MERCK COM 58933Y105 173,863 -10,025 -5.45 12,334 10.50 0.0254
2018-08-02 2018-06-30 13F MERCK COM 58933Y105 183,888 141,628 335.13 11,162 384.88 0.0238
2018-05-04 2018-03-31 13F MERCK COM 58933Y105 42,260 -1,606 -3.66 2,302 -6.76 0.0050
2018-02-01 2017-12-31 13F MERCK COM 58933Y105 43,866 -1,906 -4.16 2,469 -15.76 0.0052
2017-10-27 2017-09-30 13F MERCK COM 58933Y105 45,772 -109,172 -70.46 2,931 -70.49 0.0066
2017-08-07 2017-06-30 13F MERCK COM 58933Y105 154,944 11,537 8.04 9,931 8.99 0.0232
2017-05-10 2017-03-31 13F MERCK COM 58933Y105 143,407 -8,746 -5.75 9,112 1.72 0.0217
2017-02-09 2016-12-31 13F MERCK and COM 58933Y105 152,153 -520,496 -77.38 8,958 -78.66 0.0226
2016-11-02 2016-09-30 13F MERCK COM 58933Y105 672,649 -129,931 -16.19 41,980 -9.21 0.1176
2016-08-09 2016-06-30 13F MERCK and COM 58933Y105 802,580 110,701 16.00 46,238 26.31 0.1849
2016-05-17 2016-03-31 13F/A-2 MERCK COM 58933Y105 691,879 -92,917 -11.84 36,607 -11.69 0.1512
2016-05-12 2016-03-31 13F/A-1 MERCK and CO INC COM 58933Y105 691,879 0 36,607 0.1502
2016-05-12 2016-03-31 13F MERCK and CO INC COM 58933Y105 691,879 36,607
2016-02-10 2015-12-31 13F MERCK COM 58933Y105 784,796 -201,481 -20.43 41,453 -14.90 0.1722
2015-11-06 2015-09-30 13F MERCK and CO INC COM 58933Y105 986,277 -240,084 -19.58 48,712 -30.24 0.2007
2015-08-14 2015-06-30 13F/A-01 MERCK and CO INC COM 58933Y105 1,226,361 -544,142 -30.73 69,826 -31.39 0.2584
2015-08-07 2015-06-30 13F MERCK and CO INC COM 58933Y105 1,226,361 69,826
2015-05-07 2015-03-31 13F MERCK and CO INC COM 58933Y105 1,770,503 -608,221 -25.57 101,769 -24.66 0.3656
2015-02-11 2014-12-31 13F MERCK and CO INC COM 58933Y105 2,378,724 26,961 1.15 135,088 -3.10 0.4979
2014-10-16 2014-09-30 13F MERCK & CO INC Common Stock 58933Y105 2,351,763 -287,223 -10.88 139,414 -8.68 1.0508
2014-08-08 2014-06-30 13F Merck Common Stock 58933Y105 2,638,986 -362,115 -12.07 152,658 -10.40 1.0353
2014-05-06 2014-03-31 13F Merck Common Stock 58933Y105 3,001,101 254,320 9.26 170,372 23.99 1.1560
2014-02-12 2013-12-31 13F Merck Common Stock 58933Y105 2,746,781 -735,820 -21.13 137,405 -17.13 0.9690
2014-03-12 2013-09-30 13F/A-1 MERCK and CO INC Common Stocks 58933Y105 3,482,601 3,482,601 165,805 1.1895
2013-11-12 2013-09-30 13F MERCK and CO INC Common Stocks 58933Y105 3,482,601 165,805
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.