Merck & Co., Inc.
DE ˙ XTRA ˙ US58933Y1055
102,78 € ↑2,84 (2,84%)
2026-06-04
AKTIENPREIS
SecurityDE:6MK / Merck & Co., Inc.
InstitutionXTX Topco Ltd
Latest Disclosed Ownership34,803 shares
Latest Disclosed Value $ 4,186,453
XTX Topco Ltd ownership in 6MK / Merck & Co., Inc.

On May 15, 2026 - XTX Topco Ltd filed a 13F-HR form disclosing ownership of 34,803 shares of Merck & Co., Inc. (DE:6MK) valued at $3,626,473 USD as of March 31, 2026. The entity filed a previous 13F-HR on February 17, 2026 disclosing 0 shares of Merck & Co., Inc.. The current value of the position is $3,577,052 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)
2026-05-15 2026-03-31 13F MERCK COM 58933Y105 34,803 34,803 4,186 0.0728
2026-02-17 2025-12-31 13F MERCK COM 58933Y105 0 -39,536 -100.00 0 -100.00
2025-11-14 2025-09-30 13F MERCK COM 58933Y105 39,536 39,536 3,318 0.1722
2025-08-12 2025-06-30 13F MERCK COM 58933Y105 0 -25,325 -100.00 0 -100.00
2025-05-08 2025-03-31 13F MERCK COM 58933Y105 25,325 15,404 155.27 2,273 130.53 0.1163
2025-02-13 2024-12-31 13F MERCK COM 58933Y105 9,921 -31,228 -75.89 987 -78.90 0.0811
2024-11-14 2024-09-30 13F MERCK COM 58933Y105 41,149 2,977 7.80 4,673 -1.12 0.3378
2024-08-12 2024-06-30 13F MERCK COM 58933Y105 38,172 28,997 316.04 4,726 290.50 0.4046
2024-05-13 2024-03-31 13F MERCK COM 58933Y105 9,175 6,838 292.60 1,211 376.38 0.1632
2024-02-13 2023-12-31 13F MERCK COM 58933Y105 2,337 -774 -24.88 255 -20.62 0.0558
2023-11-13 2023-09-30 13F MERCK COM 58933Y105 3,111 3,111 320 0.0547
2023-05-12 2023-03-31 13F MERCK COM 58933Y105 0 -12,136 -100.00 0 -100.00
2023-02-14 2022-12-31 13F MERCK COM 58933Y105 12,136 12,136 1,346 0.2858
2022-05-13 2022-03-31 13F MERCK COM 58933Y105 0 -5,772 -100.00 0 -100.00
2022-02-11 2021-12-31 13F MERCK COM 58933Y105 5,772 -21,718 -79.00 442 -78.60 0.2500
2021-11-12 2021-09-30 13F MERCK COM 58933Y105 27,490 27,490 2,065 0.6936
2021-08-12 2021-06-30 13F MERCK & CO. COM 58933Y105 0 -7,351 -100.00 0 -100.00
2021-05-14 2021-03-31 13F MERCK & CO. COM 58933Y105 7,351 7,351 567 0.2755
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.