Merck & Co., Inc.
MX ˙ BMV ˙ US58933Y1055
SecurityMX:MRK / Merck & Co., Inc.
InstitutionWallace Advisory Group, LLC
Latest Disclosed Ownership115,409 shares
Latest Disclosed Value $ 13,882,549
Wallace Advisory Group, LLC reports 0.02% decrease in ownership of MRK / Merck & Co., Inc.

On April 21, 2026 - Wallace Advisory Group, LLC filed a 13F-HR form disclosing ownership of 115,409 shares of Merck & Co., Inc. (MX:MRK) valued at $13,882,549 USD as of March 31, 2026. The entity filed a previous 13F-HR on January 23, 2026 disclosing 115,430 shares of Merck & Co., Inc.. This represents a change in shares of -0.02% 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)
2026-04-21 2026-03-31 13F MERCK COM 58933Y105 115,409 -21 -0.02 13,883 14.26 9.4631
2026-01-23 2025-12-31 13F MERCK COM 58933Y105 115,430 -234 -0.20 12,150 32.71 12.7480
2025-10-16 2025-09-30 13F MERCK COM 58933Y105 115,664 -349 -0.30 9,156 -12.08 7.3585
2025-07-30 2025-06-30 13F MERCK COM 58933Y105 116,013 53 0.05 10,413 -9.73 7.5577
2025-04-09 2025-03-31 13F MERCK COM 58933Y105 115,960 204 0.18 11,536 -12.25 7.9836
2025-01-14 2024-12-31 13F MERCK COM 58933Y105 115,756 53 0.05 13,145 -8.23 9.0852
2024-10-04 2024-09-30 13F MERCK COM 58933Y105 115,703 -41 -0.04 14,324 -0.03 10.4795
2024-08-15 2024-06-30 13F MERCK COM 58933Y105 115,744 -724 -0.62 14,329 12.85 10.3147
2024-04-12 2024-03-31 13F MERCK COM 58933Y105 116,468 -510 -0.44 12,697 5.44 9.5386
2024-01-09 2023-12-31 13F MERCK COM 58933Y105 116,978 12 0.01 12,043 -10.77 9.4325
2023-10-05 2023-09-30 13F MERCK COM 58933Y105 116,966 -477 -0.41 13,497 8.02 9.6910
2023-07-11 2023-06-30 13F MERCK COM 58933Y105 117,443 0 0.00 12,495 0.00 9.5051
2023-05-11 2023-03-31 13F MERCK COM 58933Y105 117,443 22 0.02 12,495 -4.09 9.5046
2023-02-21 2022-12-31 13F MERCK COM 58933Y105 117,421 117,421 13,028 10.2834
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.