Merck & Co., Inc.
MX ˙ BMV ˙ US58933Y1055
SecurityMX:MRK / Merck & Co., Inc.
InstitutionColony Group, LLC
Latest Disclosed Ownership1,427,544 shares
Latest Disclosed Value $ 149,606,272
Colony Group, LLC reports 15.52% increase in ownership of MRK / Merck & Co., Inc.

On February 13, 2026 - Colony Group, LLC filed a 13F-HR form disclosing ownership of 1,427,544 shares of Merck & Co., Inc. (MX:MRK) valued at $149,606,272 USD as of December 31, 2025. The entity filed a previous 13F-HR on November 14, 2025 disclosing 1,235,786 shares of Merck & Co., Inc.. This represents a change in shares of 15.52% 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)
2026-02-13 2025-12-31 13F MERCK COM 58933Y105 1,427,544 191,758 15.52 149,606 44.19 0.1705
2025-11-14 2025-09-30 13F MERCK COM 58933Y105 1,235,786 22,132 1.82 103,753 7.95 0.1674
2025-08-14 2025-06-30 13F MERCK COM 58933Y105 1,213,654 22,478 1.89 96,111 -10.13 0.2082
2025-05-20 2025-03-31 13F/A-1 MERCK COM 58933Y105 1,191,176 60,866 5.38 106,950 -4.91 0.2679
2025-05-15 2025-03-31 13F MERCK COM 58933Y105 1,191,176 166,570 106,950 0.2679
2025-05-29 2024-12-31 13F/A-2 MERCK COM 58933Y105 1,130,310 119,867 11.86 112,468 -1.98 0.2920
2025-05-20 2024-12-31 13F/A-1 MERCK COM 58933Y105 1,024,606 14,163 112,468 0.2920
2025-02-14 2024-12-31 13F MERCK COM 58933Y105 1,024,606 14,163 112,468 0.2920
2024-11-14 2024-09-30 13F MERCK COM 58933Y105 1,010,443 149,577 17.38 114,740 108,144.34 0.3655
2024-08-15 2024-06-30 13F MERCK COM 58933Y105 860,866 66,578 8.38 107 1.92 0.3587
2024-05-16 2024-03-31 13F MERCK Common 58933Y105 794,288 271,718 52.00 105 85.71 0.8509
2024-02-15 2023-12-31 13F MERCK COM 58933Y105 522,570 522,570 57 0.7463
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.