默克公司
MX ˙ BMV ˙ US58933Y1055
SecurityMX:MRK / Merck & Co., Inc.
InstitutionGSB Wealth Management, LLC
Latest Disclosed Ownership32,719 shares
Latest Disclosed Value $ 3,935,753
GSB Wealth Management, LLC reports 1.88% decrease in ownership of MRK / Merck & Co., Inc.

On April 20, 2026 - GSB Wealth Management, LLC filed a 13F-HR form disclosing ownership of 32,719 shares of Merck & Co., Inc. (MX:MRK) valued at $3,935,753 USD as of March 31, 2026. The entity filed a previous 13F-HR on February 5, 2026 disclosing 33,347 shares of Merck & Co., Inc.. This represents a change in shares of -1.88% 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)
2026-04-20 2026-03-31 13F MERCK & CO INC COM COM 58933Y105 32,719 -628 -1.88 3,936 12.11 0.8884
2026-02-05 2025-12-31 13F MERCK & CO INC COM COM 58933Y105 33,347 -855 -2.50 3,510 22.30 0.7937
2025-10-21 2025-09-30 13F MERCK & CO INC COM Stock 58933Y105 34,202 -1,442 -4.05 2,871 1.74 0.6504
2025-07-15 2025-06-30 13F MERCK & CO INC COM Stock 58933Y105 35,644 -2,544 -6.66 2,822 -17.68 0.6908
2025-04-18 2025-03-31 13F MERCK & CO INC COM Stock 58933Y105 38,188 -1,206 -3.06 3,428 -12.53 0.9008
2025-01-21 2024-12-31 13F MERCK COM 58933Y105 39,394 -2,412 -5.77 3,919 -17.46 1.0124
2024-10-25 2024-09-30 13F MERCK COM 58933Y105 41,806 5,333 14.62 4,748 5.14 1.2150
2024-07-18 2024-06-30 13F MERCK COM 58933Y105 36,473 -656 -1.77 4,515 -7.84 1.2321
2024-05-02 2024-03-31 13F MERCK COM 58933Y105 37,129 -111 -0.30 4,899 20.69 1.3786
2024-02-13 2023-12-31 13F MERCK COM 58933Y105 37,240 -264 -0.70 4,060 5.16 1.2480
2023-11-13 2023-09-30 13F MERCK COM 58933Y105 37,504 222 0.60 3,861 -10.25 1.2925
2023-08-08 2023-06-30 13F MERCK COM 58933Y105 37,282 1,524 4.26 4,302 13.07 1.3991
2023-05-18 2023-03-31 13F/A-1 MERCK COM 58933Y105 35,758 -994 -2.70 3,804 -6.70 1.2438
2023-05-15 2023-03-31 13F MERCK COM 58933Y105 35,758 -994 3,804 1.4142
2023-02-16 2022-12-31 13F MERCK COM 58933Y105 36,752 -1,039 -2.75 4,078 25.25 1.4554
2022-10-18 2022-09-30 13F MERCK COM 58933Y105 37,791 -213 -0.56 3,255 -6.06 1.1801
2022-07-20 2022-06-30 13F MERCK COM 58933Y105 38,004 -184 -0.48 3,465 10.60 1.1811
2022-05-02 2022-03-31 13F MERCK COM 58933Y105 38,188 -1,621 -4.07 3,133 2.69 0.9140
2022-02-11 2021-12-31 13F MERCK COM 58933Y105 39,809 31,065 355.27 3,051 364.38 0.8760
2021-10-22 2021-09-30 13F MERCK COM 58933Y105 8,744 -33,340 -79.22 657 -79.93 0.3376
2021-07-29 2021-06-30 13F MERCK COM 58933Y105 42,084 -2,324 -5.23 3,273 -4.38 1.0196
2021-08-11 2021-03-31 13F/A-1 MERCK & CO. COM 58933Y105 44,408 40,908 1,168.80 3,423 1,096.85 1.1386
2021-05-05 2021-03-31 13F MERCK & CO. COM 58933Y105 651,996 648,496 50,966 0.8216
2021-02-08 2020-12-31 13F MERCK & CO. COM 58933Y105 3,500 0 0.00 286 -1.38 1.2821
2020-10-19 2020-09-30 13F MERCK & CO. COM 58933Y105 3,500 0 0.00 290 7.01 1.3239
2020-08-18 2020-06-30 13F MERCK & CO. COM 58933Y105 3,500 0 0.00 271 0.74 1.5126
2020-04-30 2020-03-31 13F MERCK & CO. COM 58933Y105 3,500 0 0.00 269 -15.41 1.9638
2020-02-14 2019-12-31 13F/A-1 MERCK COM 58933Y105 3,500 0 0.00 318 7.80 1.3082
2020-02-12 2019-12-31 13F MERCK COM 58933Y105 35,234 31,734 3,210 87,336.6247
2019-11-13 2019-09-30 13F/A-1 MERCK COM 58933Y105 3,500 0 0.00 295 0.68 1.4339
2019-11-12 2019-09-30 13F MERCK COM 58933Y105 36,233 32,733 3,048 80,289.6539
2019-08-09 2019-06-30 13F MERCK COM 58933Y105 3,500 0 0.00 293 0.69 1.5299
2019-05-03 2019-03-31 13F MERCK COM 58933Y105 3,500 0 0.00 291 8.99 1.2475
2019-01-24 2018-12-31 13F MERCK COM 58933Y105 3,500 -3,500 -50.00 267 -46.28 1.4091
2018-10-22 2018-09-30 13F MERCK COM 58933Y105 7,000 7,000 497 2.0479
2017-05-09 2017-03-31 13F MERCK COM 58933Y105 0 -8,050 -100.00 0 -100.00
2017-02-17 2016-12-31 13F MERCK COM 58933Y105 8,050 8,050 474 1.8542
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.