Merck & Co., Inc.
MX ˙ BMV ˙ US58933Y1055
SecurityMX:MRK / Merck & Co., Inc.
InstitutionIcon Wealth Advisors, LLC
Latest Disclosed Ownership15,258 shares
Latest Disclosed Value $ 1,692,830
Icon Wealth Advisors, LLC reports 1.28% decrease in ownership of MRK / Merck & Co., Inc.

On May 12, 2026 - Icon Wealth Advisors, LLC filed a 13F-HR form disclosing ownership of 15,258 shares of Merck & Co., Inc. (MX:MRK) valued at $1,692,830 USD as of March 31, 2026. The entity filed a previous 13F-HR on February 13, 2026 disclosing 15,456 shares of Merck & Co., Inc.. This represents a change in shares of -1.28% 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 & CO INC COM Stock 58933Y105 15,258 -198 -1.28 1,693 7.91 0.1099
2026-02-13 2025-12-31 13F MERCK & CO INC COM Stock 58933Y105 15,456 1,211 8.50 1,569 31.21 0.1045
2025-11-14 2025-09-30 13F MERCK & CO INC COM Stock 58933Y105 14,245 -22,419 -61.15 1,196 -58.82 0.0811
2025-08-14 2025-06-30 13F MERCK & CO INC COM Stock 58933Y105 36,664 -8,873 -19.49 2,902 -28.99 0.2067
2025-05-15 2025-03-31 13F MERCK & CO INC COM Stock 58933Y105 45,537 -2,557 -5.32 4,087 -14.57 0.3362
2025-02-14 2024-12-31 13F MERCK & CO INC COM Stock 58933Y105 48,094 20 0.04 4,784 -12.36 0.3935
2024-11-14 2024-09-30 13F/A-1 MERCK & CO INC COM Stock 58933Y105 48,074 3,970 9.00 5,459 9.42 0.4544
2024-11-12 2024-09-30 13F MERCK & CO INC COM Stock 58933Y105 22,412 -21,692 2,755 0.2293
2024-08-14 2024-06-30 13F MERCK & CO INC COM Stock 58933Y105 44,104 4,882 12.45 4,989 -3.59 0.4438
2024-05-15 2024-03-31 13F MERCK & CO INC COM Stock 58933Y105 39,222 -2,524 -6.05 5,175 13.71 0.4808
2024-02-14 2023-12-31 13F MERCK & CO INC COM Stock 58933Y105 41,746 -32,574 -43.83 4,551 -44.80 0.4738
2023-02-14 2022-12-31 13F MERCK COM 58933Y105 74,320 -382 -0.51 8,246 28.17 0.9476
2023-01-25 2022-09-30 13F MERCK COM 58933Y105 74,702 74,702 6,433 0.7809
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.