Merck & Co., Inc.
MX ˙ BMV ˙ US58933Y1055
SecurityMX:MRK / Merck & Co., Inc.
InstitutionBrookstone Capital Management
Latest Disclosed Ownership115,830 shares
Latest Disclosed Value $ 13,933,176
Brookstone Capital Management reports 13.44% increase in ownership of MRK / Merck & Co., Inc.

On April 16, 2026 - Brookstone Capital Management filed a 13F-HR form disclosing ownership of 115,830 shares of Merck & Co., Inc. (MX:MRK) valued at $13,933,176 USD as of March 31, 2026. The entity filed a previous 13F-HR on January 15, 2026 disclosing 102,105 shares of Merck & Co., Inc.. This represents a change in shares of 13.44% 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)
2026-04-16 2026-03-31 13F MERCK COM 58933Y105 115,830 13,725 13.44 13,933 29.65 0.1592
2026-01-15 2025-12-31 13F MERCK COM 58933Y105 102,105 -3,320 -3.15 10,748 21.46 0.1229
2025-10-15 2025-09-30 13F MERCK COM 58933Y105 105,425 42,138 66.58 8,848 76.64 0.1056
2025-07-30 2025-06-30 13F MERCK COM 58933Y105 63,287 -12,786 -16.81 5,010 -26.64 0.0657
2025-04-29 2025-03-31 13F MERCK COM 58933Y105 76,073 9,562 14.38 6,828 3.20 0.0978
2025-01-13 2024-12-31 13F MERCK COM 58933Y105 66,511 -7,279 -9.86 6,617 -21.04 0.0963
2024-10-08 2024-09-30 13F MERCK COM 58933Y105 73,790 8,237 12.57 8,380 1.54 0.1235
2024-07-18 2024-06-30 13F MERCK COM 58933Y105 65,553 1,077 1.67 8,252 -3.00 0.1369
2024-04-15 2024-03-31 13F MERCK COM 58933Y105 64,476 4,296 7.14 8,508 29.68 0.1520
2024-01-11 2023-12-31 13F MERCK COM 58933Y105 60,180 9,977 19.87 6,561 30.13 0.1276
2023-10-20 2023-09-30 13F MERCK COM 58933Y105 50,203 491 0.99 5,042 -6.96 0.1107
2023-07-11 2023-06-30 13F MERCK COM 58933Y105 49,712 290 0.59 5,419 -4.68 0.1090
2023-04-19 2023-03-31 13F MERCK COM 58933Y105 49,422 -19,505 -28.30 5,684 -28.19 0.1106
2023-01-09 2022-12-31 13F MERCK COM 58933Y105 68,927 -106,284 -60.66 7,916 -50.04 0.1602
2022-10-14 2022-09-30 13F MERCK COM 58933Y105 175,211 -6,327 -3.49 15,843 -5.94 0.3662
2022-07-11 2022-06-30 13F MERCK COM 58933Y105 181,538 52,887 41.11 16,843 51.13 0.3728
2022-04-12 2022-03-31 13F MERCK COM 58933Y105 128,651 -801 -0.62 11,145 7.22 0.2180
2022-01-11 2021-12-31 13F MERCK COM 58933Y105 129,452 29,231 29.17 10,395 31.38 0.1791
2021-11-03 2021-09-30 13F MERCK COM 58933Y105 100,221 25,880 34.81 7,912 37.12 0.1424
2021-07-14 2021-06-30 13F MERCK COM 58933Y105 74,341 16,966 29.57 5,770 30.45 0.1034
2021-04-16 2021-03-31 13F MERCK & CO. COM 58933Y105 57,375 9,795 20.59 4,423 13.64 0.1695
2021-01-13 2020-12-31 13F MERCK & CO. COM 58933Y105 47,580 -1,039 -2.14 3,892 -3.50 0.1547
2020-10-13 2020-09-30 13F MERCK & CO. COM 58933Y105 48,619 12,100 33.13 4,033 42.81 0.1863
2020-07-21 2020-06-30 13F MERCK & CO. COM 58933Y105 36,519 24,291 198.65 2,824 200.11 0.1759
2020-04-14 2020-03-31 13F MERCK & CO. COM 58933Y105 12,228 -5,921 -32.62 941 -43.00 0.0541
2020-01-29 2019-12-31 13F MERCK COM 58933Y105 18,149 8,443 86.99 1,651 102.08 0.0838
2019-10-18 2019-09-30 13F MERCK COM 58933Y105 9,706 829 9.34 817 9.81 0.0444
2019-07-25 2019-06-30 13F MERCK COM 58933Y105 8,877 1,059 13.55 744 14.46 0.0430
2019-04-18 2019-03-31 13F MERCK COM 58933Y105 7,818 -1,408 -15.26 650 -7.80 0.0422
2019-02-05 2018-12-31 13F MERCK COM 58933Y105 9,226 -65,319 -87.62 705 -86.67 0.0535
2018-11-05 2018-09-30 13F MERCK COM 58933Y105 74,545 -12,467 -14.33 5,288 0.11 0.4022
2018-08-06 2018-06-30 13F MERCK COM 58933Y105 87,012 -19,342 -18.19 5,282 -8.82 0.4601
2018-04-23 2018-03-31 13F MERCK COM 58933Y105 106,354 2,760 2.66 5,793 -0.62 0.5257
2018-02-07 2017-12-31 13F MERCK COM 58933Y105 103,594 13,338 14.78 5,829 0.87 0.5235
2017-10-31 2017-09-30 13F MERCK COM 58933Y105 90,256 -5,950 -6.18 5,779 -6.28 0.5233
2017-08-08 2017-06-30 13F MERCK COM 58933Y105 96,206 764 0.80 6,166 1.68 0.5879
2017-04-28 2017-03-31 13F MERCK COM 58933Y105 95,442 10,132 11.88 6,064 20.75 0.6135
2017-01-12 2016-12-31 13F MERCK COM 58933Y105 85,310 11,954 16.30 5,022 9.70 0.5515
2016-10-28 2016-09-30 13F MERCK COM 58933Y105 73,356 4,621 6.72 4,578 15.61 0.5042
2016-07-19 2016-06-30 13F MERCK COM 58933Y105 68,735 8,929 14.93 3,960 25.12 0.5175
2016-04-14 2016-03-31 13F MERCK & CO INC COM 58933Y105 59,806 53,413 835.49 3,165 836.39 0.4770
2016-01-14 2015-12-31 13F MERCK & CO INC COM 58933Y105 6,393 -286 -4.28 338 2.42 0.0650
2015-10-28 2015-09-30 13F MERCK & CO INC. COM COM 58933Y105 6,679 -58,161 -89.70 330 -91.06 0.0598
2015-08-11 2015-06-30 13F MERCK & CO INC. COM COM 58933Y105 64,840 13,077 25.26 3,691 24.07 0.4643
2015-05-14 2015-03-31 13F MERCK & CO INC. COM COM 58933Y105 51,763 51,763 0.00 2,975 0.4503
2015-01-29 2014-12-31 13F MERCK & CO INC. COM COM 58933Y105 0 -15,519 -100.00 0 -100.00
2014-10-14 2014-09-30 13F MERCK & CO INC. COM COM 58933Y105 15,519 10,009 181.65 920 188.40 0.1730
2014-07-14 2014-06-30 13F MERCK & CO INC COM 58933Y105 5,510 228 4.32 319 6.33 0.0651
2014-05-15 2014-03-31 13F MERCK & CO INC. COM COM 58933Y105 5,282 -122 -2.26 300 11.11 0.0761
2014-02-10 2013-12-31 13F MERCK & CO INC. COM COM 58933Y105 5,404 5,404 270 0.0777
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.