Merck & Co., Inc.
BG ˙ BUL ˙ US58933Y1055
SecurityBG:6MK / Merck & Co., Inc.
InstitutionVivaldi Capital Management, LLC
Latest Disclosed Ownership5,197 shares
Latest Disclosed Value $ 625,147
Vivaldi Capital Management, LLC reports 3.42% increase in ownership of 6MK / Merck & Co., Inc.

On May 14, 2026 - Vivaldi Capital Management, LLC filed a 13F-HR form disclosing ownership of 5,197 shares of Merck & Co., Inc. (BG:6MK) valued at $625,147 USD as of March 31, 2026. The entity filed a previous 13F-HR on February 13, 2026 disclosing 5,025 shares of Merck & Co., Inc.. This represents a change in shares of 3.42% 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)
2026-05-14 2026-03-31 13F MERCK COM 58933Y105 5,197 172 3.42 625 18.37 0.0864
2026-02-13 2025-12-31 13F MERCK COM 58933Y105 5,025 24 0.48 529 26.01 0.0719
2025-11-17 2025-09-30 13F MERCK COM 58933Y105 5,001 -3,818 -43.29 420 -39.97 0.0593
2025-08-14 2025-06-30 13F MERCK COM 58933Y105 8,819 -191 -2.12 698 -13.61 0.1048
2025-05-15 2025-03-31 13F MERCK COM 58933Y105 9,010 69 0.77 809 -7.66 0.1302
2025-02-14 2024-12-31 13F MERCK COM 58933Y105 8,941 702 8.52 876 -6.42 0.1343
2024-11-14 2024-09-30 13F MERCK COM 58933Y105 8,239 55 0.67 936 -7.70 0.2717
2024-08-14 2024-06-30 13F MERCK COM 58933Y105 8,184 385 4.94 1,013 -0.10 0.2885
2024-05-15 2024-03-31 13F MERCK COM 58933Y105 7,799 -285 -3.53 1,014 0.10 0.2959
2024-02-14 2023-12-31 13F MERCK COM 58933Y105 8,084 630 8.45 1,014 32.07 0.3041
2023-11-14 2023-09-30 13F MERCK COM 58933Y105 7,454 170 2.33 767 -8.69 0.2509
2023-08-14 2023-06-30 13F MERCK COM 58933Y105 7,284 355 5.12 841 13.98 0.2591
2023-05-12 2023-03-31 13F MERCK COM 58933Y105 6,929 -156 -2.20 737 -5.75 0.2229
2023-02-14 2022-12-31 13F MERCK COM 58933Y105 7,085 208 3.02 782 29.90 0.1940
2022-11-14 2022-09-30 13F MERCK COM 58933Y105 6,877 48 0.70 602 -3.37 0.1626
2022-08-15 2022-06-30 13F MERCK COM 58933Y105 6,829 237 3.60 623 4.53 0.1622
2022-05-16 2022-03-31 13F MERCK COM 58933Y105 6,592 93 1.43 596 19.68 0.1552
2022-02-14 2021-12-31 13F MERCK COM 58933Y105 6,499 24 0.37 498 2.47 0.1154
2021-11-16 2021-09-30 13F MERCK COM 58933Y105 6,475 0 0.00 486 -2.21 0.1053
2021-08-16 2021-06-30 13F MERCK COM 58933Y105 6,475 -728 -10.11 497 0.0998
2021-05-17 2021-03-31 13F MERCK & CO. COM 58933Y105 7,203 -247 -3.32 1 0.1116
2021-02-16 2020-12-31 13F MERCK & CO. COM 58933Y105 7,450 500 7.19 1 0.1302
2020-11-16 2020-09-30 13F MERCK & CO. COM 58933Y105 6,950 3,340 92.52 1 -100.00 0.1253
2020-08-13 2020-06-30 13F MERCK & CO. COM 58933Y105 3,610 -875 -19.51 298 -13.37 0.0620
2020-05-15 2020-03-31 13F MERCK & CO. Equity 58933Y105 4,485 204 4.77 344 -11.34 0.0776
2020-02-11 2019-12-31 13F MERCK Equity 58933Y105 4,281 -1,421 -24.92 388 -19.17 0.0938
2019-11-14 2019-09-30 13F MERCK Equity 58933Y105 5,702 2,082 57.51 480 58.42 0.1137
2019-08-14 2019-06-30 13F MERCK Equity 58933Y105 3,620 393 12.18 303 13.06 0.0791
2019-05-15 2019-03-31 13F MERCK Equity 58933Y105 3,227 -388 -10.73 268 -2.90 0.0745
2019-02-13 2018-12-31 13F MERCK Equity 58933Y105 3,615 -239 -6.20 276 1.10 0.1190
2018-11-14 2018-09-30 13F/A MERCK Equity 58933Y105 3,854 21 0.55 273 17.17 0.1459
2018-11-14 2018-09-30 13F MERCK Equity 58933Y105 3,854 273
2018-08-13 2018-06-30 13F MERCK Stock 58933Y105 3,833 64 1.70 233 13.66 0.1914
2018-05-08 2018-03-31 13F MERCK Stock 58933Y105 3,769 -3 -0.08 205 -3.30 0.1531
2018-02-14 2017-12-31 13F MERCK Equity 58933Y105 3,772 -171 -4.34 212 -15.87 0.1779
2017-11-13 2017-09-30 13F MERCK Stock 58933Y105 3,943 48 1.23 252 0.80 1.0823
2017-08-09 2017-06-30 13F MERCK Stock 58933Y105 3,895 3,895 0 0.0005
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.