Merck & Co., Inc.
MX ˙ BMV ˙ US58933Y1055
SecurityMX:MRK / Merck & Co., Inc.
InstitutionDover Advisors, Llc
Latest Disclosed Ownership11,424 shares
Latest Disclosed Value $ 1,385,124
Dover Advisors, Llc reports 11.30% decrease in ownership of MRK / Merck & Co., Inc.

On April 8, 2026 - Dover Advisors, Llc filed a 13F-HR form disclosing ownership of 11,424 shares of Merck & Co., Inc. (MX:MRK) valued at $1,385,124 USD as of March 31, 2026. The entity filed a previous 13F-HR on February 10, 2026 disclosing 12,880 shares of Merck & Co., Inc.. This represents a change in shares of -11.30% 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)
2026-04-08 2026-03-31 13F MERCK COM 58933Y105 11,424 -1,456 -11.30 1,385 1.39 0.5730
2026-02-10 2025-12-31 13F MERCK COM 58933Y105 12,880 -235 -1.79 1,367 22.95 0.5295
2025-11-10 2025-09-30 13F MERCK COM 58933Y105 13,115 -162 -1.22 1,111 5.71 0.4429
2025-07-08 2025-06-30 13F MERCK COM 58933Y105 13,277 -317 -2.33 1,051 -14.62 0.4628
2025-04-16 2025-03-31 13F MERCK COM 58933Y105 13,594 603 4.64 1,231 -4.72 0.5362
2025-02-04 2024-12-31 13F MERCK COM 58933Y105 12,991 -1,181 -8.33 1,292 -19.70 0.7408
2024-10-15 2024-09-30 13F MERCK COM 58933Y105 14,172 1,838 14.90 1,609 5.44 0.9129
2024-07-31 2024-06-30 13F MERCK COM 58933Y105 12,334 1,957 18.86 1,527 11.47 0.9436
2024-04-29 2024-03-31 13F MERCK COM 58933Y105 10,377 4,208 68.21 1,369 102.22 0.9380
2024-02-05 2023-12-31 13F MERCK COM 58933Y105 6,169 -1,556 -20.14 677 -15.37 0.8904
2023-11-03 2023-09-30 13F MERCK COM 58933Y105 7,725 205 2.73 801 -8.36 0.8102
2023-08-01 2023-06-30 13F MERCK COM 58933Y105 7,520 -220 -2.84 873 5.31 0.7747
2023-05-02 2023-03-31 13F MERCK COM 58933Y105 7,740 1,213 18.58 829 13.87 0.7972
2023-02-14 2022-12-31 13F MERCK COM 58933Y105 6,527 6,527 729 0.7859
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.