Merck & Co., Inc.
MX ˙ BMV ˙ US58933Y1055
SecurityMX:MRK / Merck & Co., Inc.
InstitutionGroupama Asset Managment
Latest Disclosed Ownership874,963 shares
Latest Disclosed Value $ 105,249,299
Groupama Asset Managment reports 2.87% decrease in ownership of MRK / Merck & Co., Inc.

On May 22, 2026 - Groupama Asset Managment filed a 13F-HR form disclosing ownership of 874,963 shares of Merck & Co., Inc. (MX:MRK) valued at $105,249,299 USD as of March 31, 2026. The entity filed a previous 13F-HR on February 27, 2026 disclosing 900,786 shares of Merck & Co., Inc.. This represents a change in shares of -2.87% 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)
2026-05-22 2026-03-31 13F MERCK COM 58933Y105 874,963 -25,823 -2.87 105,249 11.01 1.5372
2026-02-27 2025-12-31 13F MERCK COM 58933Y105 900,786 68,181 8.19 94,812 35.68 1.3882
2025-12-01 2025-09-30 13F MERCK COM 58933Y105 832,605 49,541 6.33 69,881 12.82 1.0241
2025-08-13 2025-06-30 13F MERCK COM 58933Y105 783,064 -79,295 -9.20 61,940 -19.50 1.0247
2025-05-14 2025-03-31 13F MERCK COM 58933Y105 862,359 72,571 9.19 76,948 -0.96 1.5374
2025-02-12 2024-12-31 13F MERCK COM 58933Y105 789,788 -764,709 -49.19 77,697 11.59 1.5878
2024-11-15 2024-09-30 13F MERCK COM 58933Y105 1,554,497 144,961 10.28 69,626 -20.54 1.8085
2024-08-14 2024-06-30 13F MERCK COM 58933Y105 1,409,536 713,494 102.51 87,624 -11.33 1.1888
2024-05-14 2024-03-31 13F MERCK COM 58933Y105 696,042 -809,347 -53.76 98,821 18.94 1.8002
2024-02-14 2023-12-31 13F MERCK COM 58933Y105 1,505,389 1,505,389 83,082 2.1638
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.