Merck & Co., Inc.
MX ˙ BMV ˙ US58933Y1055
SecurityMX:MRK / Merck & Co., Inc.
InstitutionM Holdings Securities, Inc.
Latest Disclosed Ownership61,723 shares
Latest Disclosed Value $ 6,964
M Holdings Securities, Inc. reports 21.37% decrease in ownership of MRK / Merck & Co., Inc.

On May 12, 2026 - M Holdings Securities, Inc. filed a 13F-HR form disclosing ownership of 61,723 shares of Merck & Co., Inc. (MX:MRK) valued at $6,964 USD as of March 31, 2026. The entity filed a previous 13F-HR on February 11, 2026 disclosing 78,499 shares of Merck & Co., Inc.. This represents a change in shares of -21.37% 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)
2026-05-12 2026-03-31 13F MERCK COM 58933Y105 61,723 -16,776 -21.37 7 -25.00 0.4709
2026-02-11 2025-12-31 13F MERCK COM 58933Y105 78,499 78,499 8 0.5917
2025-11-13 2025-09-30 13F MERCK COM 58933Y105 0 -47,025 -100.00 0 -100.00
2025-08-13 2025-06-30 13F MERCK COM 58933Y105 47,025 16,814 55.66 4 50.00 0.6380
2025-05-13 2025-03-31 13F MERCK COM 58933Y105 30,211 8,253 37.59 3 0.00 0.4512
2025-02-13 2024-12-31 13F/A-1 MERCK & CO INC COM COM 58933Y105 21,958 6,550 42.51 2 100.00 0.3521
2025-02-11 2024-12-31 13F MERCK & CO INC COM COM 58933Y105 2,184 -13,224 22 0.2938
2024-11-12 2024-09-30 13F MERCK COM 58933Y105 15,408 -35,264 -69.59 2 -83.33 0.4401
2024-08-13 2024-06-30 13F MERCK & CO INC NEW COM COM 58933Y105 50,672 35,877 242.49 6 500.00 0.8163
2024-05-14 2024-03-31 13F MERCK COM 58933Y105 14,795 -4,270 -22.40 2 -50.00 0.3281
2024-02-14 2023-12-31 13F MERCK & CO INC NEW COM COM 58933Y105 19,065 3,322 21.10 2 100.00 0.2348
2024-02-14 2023-09-30 13F MERCK & CO INC NEW COM COM 58933Y105 15,743 6,830 76.63 2 0.00 0.2139
2023-09-26 2023-06-30 13F MERCK & CO INC NEW COM COM 58933Y105 8,913 -18,314 -67.26 1 -50.00 0.2120
2023-05-16 2023-03-31 13F MERCK COM 58933Y105 27,227 -45 -0.17 3 -33.33 0.2996
2023-02-13 2022-12-31 13F MERCK COM 58933Y105 27,272 -277 -1.01 3 -99.87 0.3187
2022-11-17 2022-09-30 13F MERCK COM 58933Y105 27,549 -1,704 -5.83 2,373 -11.02 0.2623
2022-08-16 2022-06-30 13F MERCK COM 58933Y105 29,253 -2,519 -7.93 2,667 2.30 0.2701
2022-05-24 2022-03-31 13F MERCK COM 58933Y105 31,772 307 0.98 2,607 6.54 0.1974
2021-08-19 2021-06-30 13F MERCK COM 58933Y105 31,465 -458 -1.43 2,447 -0.57 0.2392
2021-05-12 2021-03-31 13F MERCK & CO. COM 58933Y105 31,923 4,914 18.19 2,461 11.41 0.2241
2021-02-26 2020-12-31 13F MERCK & CO. COM 58933Y105 27,009 1,208 4.68 2,209 3.22 0.2819
2020-11-16 2020-09-30 13F MERCK & CO. COM 58933Y105 25,801 536 2.12 2,140 9.52 0.3413
2020-08-21 2020-06-30 13F MERCK & CO. COM 58933Y105 25,265 -9,700 -27.74 1,954 -27.36 0.3496
2020-05-13 2020-03-31 13F MERCK & CO. COM 58933Y105 34,965 19,984 133.40 2,690 97.36 0.3981
2020-02-10 2019-12-31 13F MERCK COM 58933Y105 14,981 -7,602 -33.66 1,363 -28.30 0.3982
2019-11-01 2019-09-30 13F MERCK COM 58933Y105 22,583 -424 -1.84 1,901 -1.45 0.5831
2019-08-16 2019-06-30 13F MERCK COM 58933Y105 23,007 340 1.50 1,929 2.33 0.6526
2019-05-17 2019-03-31 13F MERCK COM 58933Y105 22,667 1,777 8.51 1,885 18.11 0.4361
2019-02-16 2018-12-31 13F/A-1 MERCK & CO INC COM EQUITY 58933Y105 20,890 1,203 6.11 1,596 14.24 0.4951
2019-02-15 2018-12-31 13F MERCK & CO INC COM EQUITY 58933Y105 20,890 1,203 1,596
2018-11-16 2018-09-30 13F MERCK & CO INC NEW COM Equity 58933Y105 19,687 821 4.35 1,397 22.01 0.3660
2018-08-16 2018-06-30 13F MERCK & CO INC NEW COM Equity 58933Y105 18,866 -6,007 -24.15 1,145 -15.50 0.3148
2018-05-17 2018-03-31 13F MERCK & CO INC NEW COM Equity 58933Y105 24,873 32 0.13 1,355 -3.08 0.4137
2018-02-15 2017-12-31 13F/A-1 MERCK & CO INC COM Equity 58933Y105 24,841 3,878 18.50 1,398 4.17 0.4211
2018-02-14 2017-12-31 13F MERCK & CO INC COM Equity 58933Y105 24,841 3,878 314
2017-11-15 2017-09-30 13F MERCK & CO INC COM Equity 58933Y105 20,963 1,688 8.76 1,342 8.66 0.4234
2017-08-22 2017-06-30 13F MERCK & CO INC NEW COM Equity 58933Y105 19,275 5,048 35.48 1,235 36.62 0.4214
2017-06-30 2017-03-31 13F MERCK & CO INC NEW COM EQUITY 58933Y105 14,227 -2,840 -16.64 904 -10.05 0.3484
2017-02-28 2016-12-31 13F MERCK & CO INC COM COM 58933Y105 17,067 -67 -0.39 1,005 -5.99 0.3482
2016-11-23 2016-09-30 13F MERCK COM 58933Y105 17,134 -2,359 -12.10 1,069 -4.81 0.4870
2016-08-17 2016-06-30 13F MERCK COM 58933Y105 19,493 1,534 8.54 1,123 18.21 0.5749
2016-05-25 2016-03-31 13F * MERCK & CO INC NEW COM COM 58933Y105 17,959 204 1.15 950 1.28 0.5815
2016-02-24 2015-12-31 13F MERCK & CO INC NEW COM COM 58933Y105 17,755 92 0.52 938 7.57 0.6276
2015-11-17 2015-09-30 13F * MERCK & CO INC NEW COM COM 58933Y105 17,663 2,732 18.30 872 2.59 0.6206
2016-02-24 2015-06-30 13F/A-1 * MERCK & CO INC NEW COM COM 58933Y105 14,931 -16 -0.11 850 -1.05 0.5682
2015-08-13 2015-06-30 13F MERCK COM 58933Y105 14,931 850
2015-04-14 2015-03-31 13F MERCK & CO INC COM 58933Y105 14,947 900 6.41 859 7.64 0.5610
2015-02-13 2014-12-31 13F MERCK & CO INC NEW COM COM 58933Y105 14,047 -9,149 -39.44 798 -9.42 0.5177
2014-11-17 2014-09-30 13F MERCK & CO INC NEW COM COM 58933Y105 23,196 18,624 407.35 881 232.45 0.4920
2014-09-17 2014-06-30 13F MERCK & CO INC NEW COM COM 58933Y105 4,572 -93 -1.99 265 13.73 0.1693
2014-02-13 2013-12-31 13F MERCK & CO INC NEWCOM COM 58933Y105 4,665 4,665 233 0.1661
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.