Merck & Co., Inc.
MX ˙ BMV ˙ US58933Y1055
SecurityMX:MRK / Merck & Co., Inc.
InstitutionSivia Capital Partners, LLC
Latest Disclosed Ownership16,440 shares
Latest Disclosed Value $ 1,977,568
Sivia Capital Partners, LLC reports 28.50% decrease in ownership of MRK / Merck & Co., Inc.

On May 12, 2026 - Sivia Capital Partners, LLC filed a 13F-HR form disclosing ownership of 16,440 shares of Merck & Co., Inc. (MX:MRK) valued at $1,977,568 USD as of March 31, 2026. The entity filed a previous 13F-HR on February 10, 2026 disclosing 22,993 shares of Merck & Co., Inc.. This represents a change in shares of -28.50% 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)
2026-05-12 2026-03-31 13F MERCK COM 58933Y105 16,440 -6,553 -28.50 1,978 -18.31 0.3835
2026-02-10 2025-12-31 13F MERCK COM 58933Y105 22,993 6,669 40.85 2,420 76.64 0.4900
2025-10-20 2025-09-30 13F MERCK COM 58933Y105 16,324 4,830 42.02 1,370 50.72 0.3867
2025-09-24 2025-06-30 13F/A-1 MERCK COM 58933Y105 11,494 3,941 52.18 910 34.27 0.3096
2025-07-09 2025-06-30 13F MERCK COM 58933Y105 11,494 3,941 910 0.2726
2025-04-14 2025-03-31 13F MERCK COM 58933Y105 7,553 624 9.01 678 -1.74 0.3164
2025-01-13 2024-12-31 13F MERCK COM 58933Y105 6,929 178 2.64 689 -10.05 0.3426
2024-10-11 2024-09-30 13F MERCK COM 58933Y105 6,751 267 4.12 767 -4.49 0.4528
2024-08-05 2024-06-30 13F MERCK COM 58933Y105 6,484 -614 -8.65 803 -14.32 0.5369
2024-04-19 2024-03-31 13F MERCK COM 58933Y105 7,098 -10 -0.14 937 20.93 0.6365
2024-03-13 2023-12-31 13F/A-1 MERCK COM 58933Y105 7,108 7,108 775 0.5902
2024-02-14 2023-12-31 13F MERCK COM 58933Y105 7,108 7,108 775 0.4251
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.