Merck & Co., Inc.
BG ˙ BUL ˙ US58933Y1055
SecurityBG:6MK / Merck & Co., Inc.
InstitutionCapstone Financial Advisors, Inc.
Latest Disclosed Ownership8,244 shares
Latest Disclosed Value $ 991,726
Capstone Financial Advisors, Inc. reports 6.98% decrease in ownership of 6MK / Merck & Co., Inc.

On May 15, 2026 - Capstone Financial Advisors, Inc. filed a 13F-HR form disclosing ownership of 8,244 shares of Merck & Co., Inc. (BG:6MK) valued at $991,726 USD as of March 31, 2026. The entity filed a previous 13F-HR on February 17, 2026 disclosing 8,863 shares of Merck & Co., Inc.. This represents a change in shares of -6.98% 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)
2026-05-15 2026-03-31 13F MERCK COM 58933Y105 8,244 -619 -6.98 992 6.33 0.0534
2026-02-17 2025-12-31 13F MERCK COM 58933Y105 8,863 -150 -1.66 933 23.28 0.0497
2025-11-14 2025-09-30 13F MERCK COM 58933Y105 9,013 -16 -0.18 756 5.88 0.0410
2025-08-08 2025-06-30 13F MERCK COM 58933Y105 9,029 -381 -4.05 715 -15.40 0.0414
2025-05-09 2025-03-31 13F MERCK COM 58933Y105 9,410 -658 -6.54 845 -15.68 0.0530
2025-02-14 2024-12-31 13F MERCK COM 58933Y105 10,068 23 0.23 1,002 -12.19 0.0618
2024-11-14 2024-09-30 13F MERCK COM 58933Y105 10,045 -97 -0.96 1,141 -9.16 0.0702
2024-08-13 2024-06-30 13F MERCK COM 58933Y105 10,142 203 2.04 1,256 -4.27 0.0829
2024-05-14 2024-03-31 13F MERCK COM 58933Y105 9,939 663 7.15 1,311 29.67 0.0881
2024-02-13 2023-12-31 13F MERCK COM 58933Y105 9,276 656 7.61 1,011 13.98 0.0724
2023-11-13 2023-09-30 13F MERCK COM 58933Y105 8,620 3 0.03 887 -10.76 0.0700
2023-08-15 2023-06-30 13F MERCK COM 58933Y105 8,617 448 5.48 994 14.38 0.0747
2023-05-12 2023-03-31 13F MERCK COM 58933Y105 8,169 2 0.02 869 -4.08 0.0687
2023-02-15 2022-12-31 13F MERCK COM 58933Y105 8,167 -444 -5.16 906 22.10 0.0767
2022-11-15 2022-09-30 13F MERCK COM 58933Y105 8,611 207 2.46 742 -3.13 0.0684
2022-09-02 2022-06-30 13F MERCK COM 58933Y105 8,404 7 0.08 766 11.18 0.0652
2022-05-13 2022-03-31 13F MERCK COM 58933Y105 8,397 212 2.59 689 9.89 0.0500
2022-02-11 2021-12-31 13F MERCK COM 58933Y105 8,185 4 0.05 627 2.12 0.0454
2021-11-15 2021-09-30 13F MERCK COM 58933Y105 8,181 510 6.65 614 2.85 0.0481
2021-08-16 2021-06-30 13F MERCK COM 58933Y105 7,671 3,683 92.35 597 94.46 0.0471
2021-05-13 2021-03-31 13F MERCK & CO. COM 58933Y105 3,988 0 0.00 307 -5.83 0.0272
2021-02-16 2020-12-31 13F MERCK & CO. COM 58933Y105 3,988 573 16.78 326 15.19 0.0309
2020-11-13 2020-09-30 13F MERCK & CO. COM 58933Y105 3,415 0 0.00 283 7.20 0.0299
2020-08-14 2020-06-30 13F MERCK & CO. COM 58933Y105 3,415 0 0.00 264 0.38 0.0302
2020-05-14 2020-03-31 13F MERCK & CO. COM 58933Y105 3,415 -1,562 -31.38 263 -41.94 0.0343
2020-02-14 2019-12-31 13F MERCK COM 58933Y105 4,977 130 2.68 453 11.03 0.0637
2019-11-12 2019-09-30 13F MERCK COM 58933Y105 4,847 1,632 50.76 408 51.11 0.0624
2019-08-12 2019-06-30 13F MERCK COM 58933Y105 3,215 0 0.00 270 1.12 0.0437
2019-05-14 2019-03-31 13F MERCK COM 58933Y105 3,215 311 10.71 267 20.27 0.0456
2019-02-14 2018-12-31 13F MERCK COM 58933Y105 2,904 0 0.00 222 7.77 0.0446
2018-11-19 2018-09-30 13F MERCK COM 58933Y105 2,904 2,904 206 0.0512
2016-05-09 2016-03-31 13F MERCK & CO INC COM 58933Y105 0 -4,450 -100.00 0 -100.00
2016-02-10 2015-12-31 13F MERCK & CO INC COM 58933Y105 4,450 -300 -6.32 235 0.00 0.0835
2015-11-13 2015-09-30 13F MERCK & CO INC COM 58933Y105 4,750 -86 -1.78 235 -14.55 0.1042
2015-08-13 2015-06-30 13F MERCK & CO INC COM 58933Y105 4,836 -2,010 -29.36 275 -30.20 0.1073
2015-05-13 2015-03-31 13F MERCK & CO INC COM 58933Y105 6,846 1,797 35.59 394 37.28 0.1514
2015-02-13 2014-12-31 13F MERCK & CO INC COM 58933Y105 5,049 -153 -2.94 287 -6.82 0.0892
2014-11-13 2014-09-30 13F MERCK & CO INC COM 58933Y105 5,202 5,202 308 0.1875
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.