머크 앤 컴퍼니(Merck & Co., Inc.)
MX ˙ BMV ˙ US58933Y1055
SecurityMX:MRK / Merck & Co., Inc.
InstitutionFinancial Advisory Service, Inc.
Latest Disclosed Ownership39,451 shares
Latest Disclosed Value $ 4,152,591
Financial Advisory Service, Inc. reports 6.83% increase in ownership of MRK / Merck & Co., Inc.

On February 18, 2026 - Financial Advisory Service, Inc. filed a 13F-HR form disclosing ownership of 39,451 shares of Merck & Co., Inc. (MX:MRK) valued at $4,152,591 USD as of December 31, 2025. The entity filed a previous 13F-HR on October 29, 2025 disclosing 36,929 shares of Merck & Co., Inc.. This represents a change in shares of 6.83% 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.

Upgrade to unlock premium data and export to Excel .

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)
2026-02-18 2025-12-31 13F MERCK COM 58933Y105 39,451 2,522 6.83 4,153 33.98 0.2683
2025-10-29 2025-09-30 13F MERCK COM 58933Y105 36,929 1,087 3.03 3,099 9.24 0.2099
2025-08-14 2025-06-30 13F MERCK COM 58933Y105 35,842 244 0.69 2,837 -11.21 0.2099
2025-05-05 2025-03-31 13F MERCK COM 58933Y105 35,598 764 2.19 3,195 -7.79 0.2606
2025-02-14 2024-12-31 13F MERCK COM 58933Y105 34,834 713 2.09 3,465 -10.56 0.2910
2024-10-17 2024-09-30 13F MERCK COM 58933Y105 34,121 1,359 4.15 3,875 -4.46 0.3082
2024-07-29 2024-06-30 13F MERCK COM 58933Y105 32,762 697 2.17 4,056 -4.16 0.3505
2024-04-29 2024-03-31 13F MERCK COM 58933Y105 32,065 956 3.07 4,231 24.77 0.3749
2024-01-23 2023-12-31 13F MERCK COM 58933Y105 31,109 2,839 10.04 3,391 16.53 0.3222
2023-10-23 2023-09-30 13F MERCK COM 58933Y105 28,270 132 0.47 2,910 -10.35 0.3111
2023-08-08 2023-06-30 13F MERCK COM 58933Y105 28,138 1,973 7.54 3,247 16.64 0.4107
2023-05-11 2023-03-31 13F MERCK COM 58933Y105 26,165 -3,692 -12.37 2,784 -15.97 0.3018
2023-02-01 2022-12-31 13F MERCK COM 58933Y105 29,857 2,830 10.47 3,313 42.27 0.3753
2022-10-20 2022-09-30 13F MERCK COM 58933Y105 27,027 4,051 17.63 2,328 11.12 0.2585
2022-08-02 2022-06-30 13F MERCK COM 58933Y105 22,976 4,122 21.86 2,095 35.42 0.2205
2022-05-04 2022-03-31 13F MERCK COM 58933Y105 18,854 3,376 21.81 1,547 30.44 0.1456
2022-02-11 2021-12-31 13F MERCK COM 58933Y105 15,478 -400 -2.52 1,186 -0.59 0.1088
2021-11-15 2021-09-30 13F MERCK COM 58933Y105 15,878 1,352 9.31 1,193 5.58 0.1117
2021-07-29 2021-06-30 13F MERCK COM 58933Y105 14,526 1,837 14.48 1,130 15.54 0.1060
2021-05-17 2021-03-31 13F MERCK & CO. COM 58933Y105 12,689 -190 -1.48 978 -7.21 0.1018
2021-02-10 2020-12-31 13F MERCK & CO. COM 58933Y105 12,879 113 0.89 1,054 -0.47 0.1199
2020-11-16 2020-09-30 13F MERCK & CO. COM 58933Y105 12,766 58 0.46 1,059 7.73 0.1447
2020-07-21 2020-06-30 13F MERCK & CO. COM 58933Y105 12,708 76 0.60 983 1.13 0.1449
2020-05-14 2020-03-31 13F MERCK & CO. COM 58933Y105 12,632 107 0.85 972 -14.66 0.1700
2020-01-31 2019-12-31 13F MERCK COM 58933Y105 12,525 434 3.59 1,139 11.89 0.1917
2019-11-06 2019-09-30 13F MERCK COM 58933Y105 12,091 -36 -0.30 1,018 0.10 0.1845
2019-07-25 2019-06-30 13F MERCK COM 58933Y105 12,127 12 0.10 1,017 0.89 0.1894
2019-05-13 2019-03-31 13F MERCK COM 58933Y105 12,115 109 0.91 1,008 9.92 0.1967
2019-02-08 2018-12-31 13F MERCK COM 58933Y105 12,006 -655 -5.17 917 2.12 0.2098
2018-11-05 2018-09-30 13F MERCK COM 58933Y105 12,661 51 0.40 898 17.39 0.2043
2018-07-26 2018-06-30 13F MERCK COM 58933Y105 12,610 58 0.46 765 11.84 0.2056
2018-05-02 2018-03-31 13F MERCK COM 58933Y105 12,552 -976 -7.21 684 -10.12 0.1971
2018-01-29 2017-12-31 13F MERCK COM 58933Y105 13,528 222 1.67 761 -10.68 0.1999
2017-10-19 2017-09-30 13F MERCK COM 58933Y105 13,306 842 6.76 852 6.63 0.2377
2017-08-01 2017-06-30 13F MERCK COM 58933Y105 12,464 29 0.23 799 1.14 0.2381
2017-05-08 2017-03-31 13F MERCK COM 58933Y105 12,435 -1,077 -7.97 790 -0.63 0.2440
2017-02-07 2016-12-31 13F MERCK COM 58933Y105 13,512 1,128 9.11 795 2.85 0.2356
2016-11-01 2016-09-30 13F MERCK COM 58933Y105 12,384 1,039 9.16 773 18.20 0.2531
2016-08-09 2016-06-30 13F MERCK & CO INC COM 58933Y105 11,345 1,042 10.11 654 20.00 0.2415
2016-05-03 2016-03-31 13F MERCK & CO INC COM 58933Y105 10,303 1,037 11.19 545 11.45 0.2800
2016-01-22 2015-12-31 13F MERCK & CO INC COM 58933Y105 9,266 35 0.38 489 7.24 0.2444
2015-10-20 2015-09-30 13F MERCK & CO INC COM 58933Y105 9,231 467 5.33 456 -8.62 0.2627
2015-08-14 2015-06-30 13F MERCK & CO INC COM 58933Y105 8,764 4 0.05 499 -0.99 0.2498
2015-04-17 2015-03-31 13F MERCK & CO INC COM 58933Y105 8,760 8,760 0.00 504 0.2573
2015-01-28 2014-12-31 13F MERCK & CO INC COM 58933Y105 0 -8,752 -100.00 0 -100.00
2014-10-30 2014-09-30 13F MERCK & CO INC COM 58933Y105 8,752 -296 -3.27 519 -0.76 0.2977
2014-07-16 2014-06-30 13F Merck COM 58933Y105 9,048 386 4.46 523 6.30 0.3010
2014-04-25 2014-03-31 13F MERCK & CO INC COM 58933Y105 8,662 22 0.25 492 13.89 0.3337
2014-01-24 2013-12-31 13F Merck COM 58933Y105 8,640 8,640 432 0.2568
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.