Merck & Co., Inc.
DE ˙ XTRA ˙ US58933Y1055
102,78 € ↑2,84 (2,84%)
2026-06-04
AKTIENPREIS
SecurityDE:6MK / Merck & Co., Inc.
InstitutionClaro Advisors LLC
Latest Disclosed Ownership11,638 shares
Latest Disclosed Value $ 1,399,890
Claro Advisors LLC reports 3.35% decrease in ownership of 6MK / Merck & Co., Inc.

On April 21, 2026 - Claro Advisors LLC filed a 13F-HR form disclosing ownership of 11,638 shares of Merck & Co., Inc. (DE:6MK) valued at $1,212,680 USD as of March 31, 2026. The entity filed a previous 13F-HR on February 17, 2026 disclosing 12,042 shares of Merck & Co., Inc.. This represents a change in shares of -3.35% during the quarter. The current value of the position is $1,196,154 USD.

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)
2026-04-21 2026-03-31 13F MERCK COM 58933Y105 11,638 -404 -3.35 1,400 10.42 0.1686
2026-02-17 2025-12-31 13F MERCK COM 58933Y105 12,042 -422 -3.39 1,268 21.13 0.1727
2025-11-12 2025-09-30 13F MERCK COM 58933Y105 12,464 -636 -4.85 1,046 0.87 0.1525
2025-08-05 2025-06-30 13F MERCK COM 58933Y105 13,100 -1,839 -12.31 1,037 -22.61 0.1712
2025-05-12 2025-03-31 13F MERCK COM 58933Y105 14,939 -914 -5.77 1,341 -15.03 0.1794
2025-01-13 2024-12-31 13F MERCK COM 58933Y105 15,853 -2,532 -13.77 1,577 -24.44 0.2131
2024-11-07 2024-09-30 13F/A-1 MERCK COM 58933Y105 18,385 2,115 13.00 2,088 3.62 0.2698
2024-10-17 2024-09-30 13F MERCK COM 58933Y105 17,586 1,316 1,583 0.2046
2024-07-31 2024-06-30 13F MERCK COM 58933Y105 16,270 1,633 11.16 2,014 4.30 0.3145
2024-04-18 2024-03-31 13F MERCK COM 58933Y105 14,637 635 4.54 1,931 26.54 0.3353
2024-01-22 2023-12-31 13F MERCK COM 58933Y105 14,002 540 4.01 1,527 10.18 0.3305
2023-10-10 2023-09-30 13F MERCK COM 58933Y105 13,462 336 2.56 1,386 -8.52 0.3465
2023-08-08 2023-06-30 13F MERCK COM 58933Y105 13,126 441 3.48 1,515 12.23 0.3763
2023-04-17 2023-03-31 13F MERCK COM 58933Y105 12,685 1,939 18.04 1,350 13.17 0.3963
2023-03-13 2022-12-31 13F/A-1 MERCK COM 58933Y105 10,746 2,488 30.13 1,192 58.30 0.3900
2023-02-14 2022-12-31 13F MERCK COM 58933Y105 10,746 2,488 1,192 0.3892
2022-11-18 2022-09-30 13F/A-1 MERCK COM 58933Y105 8,258 0 0.00 753 0.00 0.2993
2022-11-14 2022-09-30 13F MERCK COM 58933Y105 8,258 0 753 0.2993
2022-08-12 2022-06-30 13F MERCK COM 58933Y105 8,258 511 6.60 753 26.77 0.2993
2022-05-16 2022-03-31 13F MERCK COM 58933Y105 7,747 0 0.00 594 0.00 0.2137
2022-02-14 2021-12-31 13F MERCK COM 58933Y105 7,747 106 1.39 594 3.48 0.2137
2021-11-15 2021-09-30 13F MERCK COM 58933Y105 7,641 338 4.63 574 1.06 0.2414
2021-08-13 2021-06-30 13F MERCK COM 58933Y105 7,303 623 9.33 568 10.29 0.2556
2021-05-17 2021-03-31 13F MERCK & CO. COM 58933Y105 6,680 125 1.91 515 -3.92 0.2609
2021-02-12 2020-12-31 13F MERCK & CO. COM 58933Y105 6,555 -1,819 -21.72 536 -22.88 0.2849
2020-11-16 2020-09-30 13F MERCK & CO. COM 58933Y105 8,374 13 0.16 695 7.42 0.4404
2020-08-14 2020-06-30 13F MERCK & CO. COM 58933Y105 8,361 69 0.83 647 1.41 0.4453
2020-05-15 2020-03-31 13F MERCK & CO. COM 58933Y105 8,292 -1,419 -14.61 638 -27.75 0.5947
2020-02-14 2019-12-31 13F MERCK COM 58933Y105 9,711 162 1.70 883 9.83 0.6797
2019-10-29 2019-09-30 13F MERCK COM 58933Y105 9,549 28 0.29 804 0.75 0.7133
2019-07-24 2019-06-30 13F MERCK COM 58933Y105 9,521 61 0.64 798 1.40 0.7366
2019-05-10 2019-03-31 13F MERCK COM 58933Y105 9,460 7,360 350.48 787 428.19 0.7788
2019-02-14 2018-12-31 13F MERCK COM 58933Y105 2,100 2,100 149 0.1193
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.