Merck & Co., Inc.
MX ˙ BMV ˙ US58933Y1055
SecurityMX:MRK / Merck & Co., Inc.
InstitutionWedbush Securities Inc
Latest Disclosed Ownership55,244 shares
Latest Disclosed Value $ 6,645
Wedbush Securities Inc reports 3.31% increase in ownership of MRK / Merck & Co., Inc.

On April 21, 2026 - Wedbush Securities Inc filed a 13F-HR form disclosing ownership of 55,244 shares of Merck & Co., Inc. (MX:MRK) valued at $6,645 USD as of March 31, 2026. The entity filed a previous 13F-HR on February 12, 2026 disclosing 53,472 shares of Merck & Co., Inc.. This represents a change in shares of 3.31% 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)
2026-04-21 2026-03-31 13F MERCK COM 58933Y105 55,244 1,772 3.31 7 20.00 0.1938
2026-02-12 2025-12-31 13F MERCK COM 58933Y105 53,472 -393 -0.73 6 25.00 0.1642
2025-11-06 2025-09-30 13F MERCK COM 58933Y105 53,865 -3,352 -5.86 5 0.00 0.1477
2025-08-06 2025-06-30 13F MERCK COM 58933Y105 57,217 -4,420 -7.17 5 -20.00 0.1583
2025-05-06 2025-03-31 13F MERCK COM 58933Y105 61,637 -6,197 -9.14 6 -16.67 0.2031
2025-02-13 2024-12-31 13F MERCK COM 58933Y105 67,834 1,834 2.78 7 -14.29 0.2405
2024-11-08 2024-09-30 13F MERCK COM 58933Y105 66,000 -15,863 -19.38 7 -30.00 0.2780
2024-08-07 2024-06-30 13F MERCK COM 58933Y105 81,863 -2,529 -3.00 10 -9.09 0.3623
2024-05-15 2024-03-31 13F MERCK COM 58933Y105 84,392 8,581 11.32 11 37.50 0.4154
2024-02-12 2023-12-31 13F MERCK & COMPANY INC COM 58933Y105 75,811 1,863 2.52 8 14.29 0.3661
2023-11-14 2023-09-30 13F MERCK & COMPANY INC COM 58933Y105 73,948 1,188 1.63 8 -12.50 0.3786
2023-08-14 2023-06-30 13F MERCK & COMPANY INC COM 58933Y105 72,760 386 0.53 8 14.29 0.4005
2023-05-09 2023-03-31 13F MERCK & COMPANY INC COM 58933Y105 72,374 -2,221 -2.98 8 -12.50 0.3853
2023-01-31 2022-12-31 13F MERCK & COMPANY INC COM 58933Y105 74,595 503 0.68 8 -99.87 0.4549
2022-10-18 2022-09-30 13F MERCK & COMPANY INC COM 58933Y105 74,092 -12,891 -14.82 6,381 -19.53 0.3584
2022-07-21 2022-06-30 13F MERCK & COMPANY INC COM 58933Y105 86,983 -256 -0.29 7,930 10.79 0.4318
2022-04-19 2022-03-31 13F MERCK & COMPANY INC COM 58933Y105 87,239 1,058 1.23 7,158 8.37 0.3275
2022-01-13 2021-12-31 13F MERCK & COMPANY INC COM 58933Y105 86,181 -1,989 -2.26 6,605 -0.26 0.2846
2021-10-08 2021-09-30 13F MERCK & COMPANY INC COM 58933Y105 88,170 551 0.63 6,622 -2.82 0.3143
2021-07-27 2021-06-30 13F MERCK & COMPANY INC COM 58933Y105 87,619 18,054 25.95 6,814 27.06 0.3221
2021-04-26 2021-03-31 13F MERCK & COMPANY INC COM 58933Y105 69,565 21,590 45.00 5,363 36.67 0.2970
2021-02-16 2020-12-31 13F MERCK & COMPANY INC COM 58933Y105 47,975 -106 -0.22 3,924 -1.60 0.3440
2020-10-20 2020-09-30 13F MERCK & COMPANY INC COM 58933Y105 48,081 1,224 2.61 3,988 10.07 0.3824
2020-07-16 2020-06-30 13F MERCK & COMPANY INC COM 58933Y105 46,857 4,431 10.44 3,623 11.00 0.3426
2020-04-17 2020-03-31 13F MERCK & COMPANY INC COM 58933Y105 42,426 -3,559 -7.74 3,264 -21.95 0.3884
2020-01-16 2019-12-31 13F MERCK & COMPANY INC COM 58933Y105 45,985 7,618 19.86 4,182 29.47 0.3717
2019-10-17 2019-09-30 13F MERCK & COMPANY INC COM 58933Y105 38,367 689 1.83 3,230 2.25 0.3160
2019-08-01 2019-06-30 13F MERCK & COMPANY INC COM 58933Y105 37,678 1,587 4.40 3,159 5.23 0.3176
2019-04-17 2019-03-31 13F MERCK & COMPANY INC COM 58933Y105 36,091 -8,182 -18.48 3,002 -11.26 0.3225
2019-01-31 2018-12-31 13F MERCK & COMPANY INC COM 58933Y105 44,273 1,321 3.08 3,383 11.03 0.4324
2018-11-13 2018-09-30 13F MERCK & COMPANY INC COM 58933Y105 42,952 653 1.54 3,047 18.65 0.3457
2018-08-03 2018-06-30 13F MERCK & COMPANY INC COM 58933Y105 42,299 447 1.07 2,568 12.63 0.3184
2018-05-01 2018-03-31 13F MERCK & COMPANY INC COM 58933Y105 41,852 768 1.87 2,280 -1.38 0.2978
2018-02-09 2017-12-31 13F MERCK & COMPANY INC COM 58933Y105 41,084 11,222 37.58 2,312 20.92 0.2824
2017-10-31 2017-09-30 13F MERCK & COMPANY INC COM 58933Y105 29,862 -2,735 -8.39 1,912 -8.47 0.2483
2017-08-02 2017-06-30 13F MERCK & COMPANY INC COM 58933Y105 32,597 -22 -0.07 2,089 0.77 0.2711
2017-05-05 2017-03-31 13F MERCK & COMPANY INC COM 58933Y105 32,619 -1,634 -4.77 2,073 2.83 0.2808
2017-01-25 2016-12-31 13F MERCK & COMPANY INC COM 58933Y105 34,253 -1,405 -3.94 2,016 -9.39 0.2969
2016-11-04 2016-09-30 13F MERCK & COMPANY INC COM 58933Y105 35,658 -6,560 -15.54 2,225 -8.51 0.3314
2016-08-02 2016-06-30 13F MERCK & COMPANY INC COM 58933Y105 42,218 434 1.04 2,432 10.00 0.3980
2016-05-02 2016-03-31 13F MERCK & COMPANY INC COM 58933Y105 41,784 2,131 5.37 2,211 5.59 0.3842
2016-02-03 2015-12-31 13F MERCK & COMPANY INC COM 58933Y105 39,653 13,721 52.91 2,094 63.47 0.3784
2015-10-28 2015-09-30 13F MERCK & COMPANY INC COM 58933Y105 25,932 -572 -2.16 1,281 -15.11 0.2572
2015-08-10 2015-06-30 13F MERCK & COMPANY INC COM 58933Y105 26,504 -785 -2.88 1,509 -3.82 0.2784
2015-05-12 2015-03-31 13F MERCK & COMPANY INC COM 58933Y105 27,289 27,289 0.00 1,569 0.2666
2015-01-27 2014-12-31 13F MERCK & COMPANY INC COM 58933Y105 0 -28,299 -100.00 0 -100.00
2014-11-07 2014-09-30 13F MERCK & COMPANY INC COM 58933Y105 28,299 2,259 8.68 1,678 11.42 0.2613
2014-08-04 2014-06-30 13F MERCK & COMPANY INC COM 58933Y105 26,040 -3,516 -11.90 1,506 -10.25 0.2402
2014-05-09 2014-03-31 13F MERCK & COMPANY INC COM 58933Y105 29,556 -6,136 -17.19 1,678 -6.05 0.2941
2014-02-03 2013-12-31 13F MERCK & COMPANY INC COM 58933Y105 35,692 -12,371 -25.74 1,786 -21.94 0.4218
2013-10-28 2013-09-30 13F MERCK & COMPANY INC COM 58933Y105 48,063 470 0.99 2,288 3.48 0.6044
2013-08-12 2013-06-30 13F MERCK & COMPANY INC COM 58933Y105 47,593 47,593 2,211 0.6067
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.