Merck & Co., Inc.
MX ˙ BMV ˙ US58933Y1055
SecurityMX:MRK / Merck & Co., Inc.
InstitutionValeo Financial Advisors, LLC
Latest Disclosed Ownership53,223 shares
Latest Disclosed Value $ 6,401,687
Valeo Financial Advisors, LLC reports 21.03% decrease in ownership of MRK / Merck & Co., Inc.

On May 8, 2026 - Valeo Financial Advisors, LLC filed a 13F-HR form disclosing ownership of 53,223 shares of Merck & Co., Inc. (MX:MRK) valued at $6,401,687 USD as of March 31, 2026. The entity filed a previous 13F-HR on February 4, 2026 disclosing 67,396 shares of Merck & Co., Inc.. This represents a change in shares of -21.03% 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.

Upgrade to unlock premium data and export to Excel .

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)
2026-05-08 2026-03-31 13F MERCK Stock 58933Y105 53,223 -14,173 -21.03 6,402 -9.77 0.1530
2026-02-04 2025-12-31 13F MERCK Stock 58933Y105 67,396 -2,833 -4.03 7,094 20.36 0.1574
2025-11-03 2025-09-30 13F MERCK Stock 58933Y105 70,229 3,466 5.19 5,894 11.54 0.1342
2025-09-12 2025-06-30 13F/A-1 MERCK Stock 58933Y105 66,763 -19,477 -22.58 5,285 -12.79 0.1299
2025-07-22 2025-06-30 13F MERCK Stock 58933Y105 84,758 -1,482 5,229 0.1257
2025-04-30 2025-03-31 13F MERCK Stock 58933Y105 86,240 -2,483 -2.80 6,059 -12.95 0.1689
2025-01-30 2024-12-31 13F MERCK Stock 58933Y105 88,723 -3,096 -3.37 6,961 -16.08 0.1936
2024-10-10 2024-09-30 13F MERCK Stock 58933Y105 91,819 -4,076 -4.25 8,295 -13.11 0.2364
2024-07-10 2024-06-30 13F MERCK Stock 58933Y105 95,895 1,620 1.72 9,546 -0.43 0.2983
2024-04-25 2024-03-31 13F/A-1 MERCK Stock 58933Y105 94,275 -785 -0.83 9,586 15.27 0.3435
2024-04-19 2024-03-31 13F MERCK Stock 58933Y105 95,416 356 10,110 0.3478
2024-01-29 2023-12-31 13F MERCK Stock 58933Y105 95,060 -1,533 -1.59 8,316 3.79 0.3358
2023-10-20 2023-09-30 13F MERCK Stock 58933Y105 96,593 1,191 1.25 8,013 -9.38 0.3651
2023-07-14 2023-06-30 13F MERCK Stock 58933Y105 95,402 6,203 6.95 8,842 17.99 0.4039
2023-04-17 2023-03-31 13F MERCK Stock 58933Y105 89,199 4,550 5.38 7,493 2.52 0.3609
2023-02-09 2022-12-31 13F MERCK Stock 58933Y105 84,649 -1,863 -2.15 7,309 25.20 0.4009
2022-10-31 2022-09-30 13F MERCK Stock 58933Y105 86,512 5,756 7.13 5,838 3.25 0.3722
2022-08-03 2022-06-30 13F MERCK Stock 58933Y105 80,756 -3,728 -4.41 5,654 4.76 0.3548
2022-04-28 2022-03-31 13F MERCK Stock 58933Y105 84,484 7,986 10.44 5,397 21.83 0.2742
2022-01-07 2021-12-31 13F MERCK Stock 58933Y105 76,498 -3,576 -4.47 4,430 -3.93 0.2397
2021-11-02 2021-09-30 13F MERCK Stock 58933Y105 80,074 10,734 15.48 4,611 17.09 0.2635
2021-07-22 2021-06-30 13F MERCK Stock 58933Y105 69,340 5,878 9.26 3,938 14.11 0.2389
2021-04-12 2021-03-31 13F MERCK Stock 58933Y105 63,462 6,206 10.84 3,451 9.45 0.1596
2021-02-11 2020-12-31 13F MERCK Stock 58933Y105 57,256 30,471 113.76 3,153 41.90 0.1621
2020-10-28 2020-09-30 13F MERCK Stock 58933Y105 26,785 5,621 26.56 2,222 35.74 0.1943
2020-07-20 2020-06-30 13F MERCK Stock 58933Y105 21,164 4,240 25.05 1,637 17.43 0.1490
2020-04-13 2020-03-31 13F MERCK Stock 58933Y105 16,924 3,061 22.08 1,394 10.55 0.1482
2020-01-24 2019-12-31 13F MERCK Stock 58933Y105 13,863 384 2.85 1,261 11.10 0.1224
2019-10-15 2019-09-30 13F MERCK Stock 58933Y105 13,479 -386 -2.78 1,135 -2.41 0.1254
2019-07-10 2019-06-30 13F MERCK Stock 58933Y105 13,865 2,156 18.41 1,163 19.40 0.1332
2019-04-12 2019-03-31 13F MERCK Stock 58933Y105 11,709 -3,376 -22.38 974 -15.52 0.1183
2019-01-30 2018-12-31 13F MERCK Stock 58933Y105 15,085 -8,609 -36.33 1,153 -33.85 0.1617
2018-11-01 2018-09-30 13F MERCK Stock 58933Y105 23,694 -654 -2.69 1,743 7.33 0.2354
2018-08-14 2018-06-30 13F MERCK Stock 58933Y105 24,348 1,917 8.55 1,624 32.90 0.2275
2018-04-12 2018-03-31 13F MERCK Stock 58933Y105 22,431 -13,685 -37.89 1,222 -39.86 0.1960
2018-02-09 2017-12-31 13F MERCK & CO INC COM Stock 58933Y105 36,116 9,950 38.03 2,032 21.31 0.3335
2017-11-15 2017-09-30 13F/A-1 MERCK & CO INC COM Stock 58933Y105 26,166 26,166 1,675 0.3792
2017-11-14 2017-09-30 13F MERCK & CO INC COM Stock 58933Y105 26,166 1,675
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.