머크 앤 컴퍼니(Merck & Co., Inc.)
MX ˙ BMV ˙ US58933Y1055
SecurityMX:MRK / Merck & Co., Inc.
InstitutionCornerstone Advisory, LLC
Latest Disclosed Ownership10,475 shares
Latest Disclosed Value $ 1,260,039
Cornerstone Advisory, LLC reports 1.03% increase in ownership of MRK / Merck & Co., Inc.

On May 4, 2026 - Cornerstone Advisory, LLC filed a 13F-HR form disclosing ownership of 10,475 shares of Merck & Co., Inc. (MX:MRK) valued at $1,260,039 USD as of March 31, 2026. The entity filed a previous 13F-HR on January 28, 2026 disclosing 10,368 shares of Merck & Co., Inc.. This represents a change in shares of 1.03% 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)
2026-05-04 2026-03-31 13F MERCK COM 58933Y105 10,475 107 1.03 1,260 15.49 0.1193
2026-01-28 2025-12-31 13F MERCK COM 58933Y105 10,368 -333 -3.11 1,091 21.49 0.1041
2025-11-07 2025-09-30 13F MERCK COM 58933Y105 10,701 -2,793 -20.70 898 -15.92 0.0882
2025-07-30 2025-06-30 13F MERCK COM 58933Y105 13,494 53 0.39 1,068 0.56 0.1147
2025-05-07 2025-03-31 13F MERCK COM 58933Y105 13,441 316 2.41 1,062 -2.48 0.1240
2025-02-18 2024-12-31 13F MERCK COM 58933Y105 13,125 340 2.66 1,090 -24.95 0.1238
2024-11-12 2024-09-30 13F MERCK COM 58933Y105 12,785 -179 -1.38 1,452 -9.54 0.1911
2024-08-14 2024-06-30 13F MERCK COM 58933Y105 12,964 -640 -4.70 1,605 -10.64 0.2257
2024-05-08 2024-03-31 13F MERCK COM 58933Y105 13,604 368 2.78 1,795 24.48 0.2559
2024-02-13 2023-12-31 13F MERCK COM 58933Y105 13,236 1,933 17.10 1,443 23.99 0.2250
2023-11-14 2023-09-30 13F MERCK COM 58933Y105 11,303 126 1.13 1,164 -9.78 0.2036
2023-07-20 2023-06-30 13F MERCK COM 58933Y105 11,177 -1,101 -8.97 1,290 -1.30 0.2266
2023-05-04 2023-03-31 13F MERCK COM 58933Y105 12,278 -889 -6.75 1,306 -10.55 0.2352
2023-02-13 2022-12-31 13F MERCK COM 58933Y105 13,167 672 5.38 1,461 35.69 0.2878
2022-10-26 2022-09-30 13F MERCK COM 58933Y105 12,495 35 0.28 1,076 -5.28 0.2403
2022-08-02 2022-06-30 13F MERCK COM 58933Y105 12,460 -6,911 -35.68 1,136 -28.51 0.2599
2022-05-20 2022-03-31 13F MERCK COM 58933Y105 19,371 908 4.92 1,589 12.30 0.2423
2022-02-23 2021-12-31 13F MERCK COM 58933Y105 18,463 -2,080 -10.13 1,415 -8.30 0.2034
2021-11-16 2021-09-30 13F MERCK COM 58933Y105 20,543 2,302 12.62 1,543 8.82 0.2555
2021-08-16 2021-06-30 13F MERCK COM 58933Y105 18,241 3,317 22.23 1,418 23.30 0.2389
2021-05-13 2021-03-31 13F MERCK & CO. COM 58933Y105 14,924 886 6.31 1,150 0.17 0.2176
2021-05-11 2020-12-31 13F MERCK & CO. COM 58933Y105 14,038 435 3.20 1,148 1.77 0.2324
2020-11-12 2020-09-30 13F MERCK & CO. COM 58933Y105 13,603 200 1.49 1,128 8.88 0.2631
2020-08-10 2020-06-30 13F MERCK & CO. COM 58933Y105 13,403 3,994 42.45 1,036 43.09 0.2703
2020-05-11 2020-03-31 13F MERCK & CO. COM 58933Y105 9,409 -365 -3.73 724 -18.56 0.2201
2020-02-12 2019-12-31 13F MERCK COM 58933Y105 9,774 586 6.38 889 15.01 0.1841
2019-11-12 2019-09-30 13F MERCK COM 58933Y105 9,188 180 2.00 773 2.38 0.1668
2019-08-08 2019-06-30 13F MERCK COM 58933Y105 9,008 -298 -3.20 755 -2.45 0.1637
2019-05-08 2019-03-31 13F MERCK COM 58933Y105 9,306 -69 -0.74 774 8.10 0.1703
2019-02-12 2018-12-31 13F MERCK COM 58933Y105 9,375 62 0.67 716 8.32 0.1879
2018-11-13 2018-09-30 13F MERCK COM 58933Y105 9,313 -456 -4.67 661 11.47 0.1960
2018-08-09 2018-06-30 13F MERCK COM 58933Y105 9,769 -321 -3.18 593 7.82 0.1951
2018-05-10 2018-03-31 13F MERCK COM 58933Y105 10,090 -1,852 -15.51 550 -18.15 0.1981
2018-02-09 2017-12-31 13F MERCK COM 58933Y105 11,942 -203 -1.67 672 -13.62 0.2303
2017-11-14 2017-09-30 13F MERCK COM 58933Y105 12,145 1,035 9.32 778 9.27 0.2633
2017-08-08 2017-06-30 13F MERCK COM 58933Y105 11,110 43 0.39 712 1.28 0.2383
2017-05-15 2017-03-31 13F MERCK COM 58933Y105 11,067 11 0.10 703 7.99 0.3549
2017-02-13 2016-12-31 13F MERCK COM 58933Y105 11,056 -158 -1.41 651 -7.00 0.4885
2016-11-10 2016-09-30 13F MERCK COM 58933Y105 11,214 303 2.78 700 11.29 0.5748
2016-08-10 2016-06-30 13F MERCK COM 58933Y105 10,911 4 0.04 629 9.01 0.5288
2016-05-16 2016-03-31 13F MERCK & CO INC COM 58933Y105 10,907 -851 -7.24 577 -7.09 0.4929
2016-03-03 2015-12-31 13F MERCK & CO INC COM 58933Y105 11,758 11,758 621 0.5347
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.