Merck & Co., Inc.
DE ˙ XTRA ˙ US58933Y1055
102,78 € ↑2,84 (2,84%)
2026-06-04
DEL PRIS
SecurityDE:6MK / Merck & Co., Inc.
InstitutionGM Advisory Group, Inc.
Latest Disclosed Ownership17,762 shares
Latest Disclosed Value $ 2,136,621
GM Advisory Group, Inc. reports 2.16% decrease in ownership of 6MK / Merck & Co., Inc.

On April 28, 2026 - GM Advisory Group, Inc. filed a 13F-HR form disclosing ownership of 17,762 shares of Merck & Co., Inc. (DE:6MK) valued at $1,850,800 USD as of March 31, 2026. The entity filed a previous 13F-HR on February 13, 2026 disclosing 18,154 shares of Merck & Co., Inc.. This represents a change in shares of -2.16% during the quarter. The current value of the position is $1,825,578 USD.

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)
2026-04-28 2026-03-31 13F Merck & Co Inc New Com Com 58933Y105 17,762 -392 -2.16 2,137 11.83 0.0790
2026-02-13 2025-12-31 13F Merck & Co Inc New Com COM 58933Y105 18,154 2,564 16.45 1,911 46.02 0.0749
2025-11-19 2025-09-30 13F MERCK COM 58933Y105 15,590 -4,412 -22.06 1,309 -17.37 0.0556
2025-08-13 2025-06-30 13F MERCK COM 58933Y105 20,002 292 1.48 1,583 -10.51 0.0783
2025-05-14 2025-03-31 13F MERCK COM 58933Y105 19,710 -39,271 -66.58 1,769 -69.85 0.0955
2025-02-11 2024-12-31 13F MERCK COM 58933Y105 58,981 15,144 34.55 5,867 17.86 0.3248
2024-11-12 2024-09-30 13F MERCK COM 58933Y105 43,837 1,463 3.45 4,978 -5.09 0.2984
2024-08-12 2024-06-30 13F MERCK COM 58933Y105 42,374 -360 -0.84 5,246 -6.97 0.3385
2024-05-09 2024-03-31 13F MERCK COM 58933Y105 42,734 10,771 33.70 5,639 61.83 0.3954
2024-02-12 2023-12-31 13F MERCK COM 58933Y105 31,963 11,342 55.00 3,485 64.18 0.2632
2023-11-14 2023-09-30 13F MERCK COM 58933Y105 20,621 -219 -1.05 2,123 -11.73 0.1735
2023-08-14 2023-06-30 13F MERCK COM 58933Y105 20,840 3,695 21.55 2,405 31.80 0.1991
2023-05-12 2023-03-31 13F MERCK COM 58933Y105 17,145 7,410 76.12 1,824 68.89 0.1661
2023-02-13 2022-12-31 13F MERCK COM 58933Y105 9,735 0 0.00 1,080 28.88 0.1152
2022-11-14 2022-09-30 13F MERCK COM 58933Y105 9,735 -85 -0.87 838 -6.37 0.1054
2022-08-15 2022-06-30 13F MERCK COM 58933Y105 9,820 -5 -0.05 895 11.04 0.1396
2022-05-13 2022-03-31 13F MERCK COM 58933Y105 9,825 -4,370 -30.79 806 -25.92 0.0959
2022-02-10 2021-12-31 13F MERCK COM 58933Y105 14,195 140 1.00 1,088 3.03 0.0969
2021-11-12 2021-09-30 13F MERCK COM 58933Y105 14,055 280 2.03 1,056 -1.40 0.1065
2021-08-16 2021-06-30 13F MERCK COM 58933Y105 13,775 -2,956 -17.67 1,071 -16.98 0.1099
2021-05-13 2021-03-31 13F MERCK & CO. COM 58933Y105 16,731 -7,170 -30.00 1,290 -34.02 0.1547
2021-02-12 2020-12-31 13F MERCK & CO. COM 58933Y105 23,901 -3,191 -11.78 1,955 -13.00 0.2619
2020-11-12 2020-09-30 13F MERCK & CO. COM 58933Y105 27,092 647 2.45 2,247 9.88 0.3437
2020-08-13 2020-06-30 13F MERCK & CO. COM 58933Y105 26,445 1,923 7.84 2,045 8.37 0.3782
2020-05-13 2020-03-31 13F MERCK & CO. COM 58933Y105 24,522 22,236 972.70 1,887 807.21 0.5138
2020-02-14 2019-12-31 13F MERCK COM 58933Y105 2,286 2,286 208 0.0644
2018-08-14 2018-06-30 13F MERCK COM 58933Y105 0 -5,155 -100.00 0 -100.00
2018-05-14 2018-03-31 13F MERCK COM 58933Y105 5,155 0 0.00 281 -3.10 0.0848
2018-02-09 2017-12-31 13F MERCK COM 58933Y105 5,155 5,155 290 0.0789
2017-11-13 2017-09-30 13F MERCK COM 58933Y105 0 -3,174 -100.00 0 -100.00
2017-08-11 2017-06-30 13F MERCK COM 58933Y105 3,174 3,174 205 0.0645
2017-05-12 2017-03-31 13F MERCK COM 58933Y105 0 -3,452 -100.00 0 -100.00
2017-02-13 2016-12-31 13F MERCK COM 58933Y105 3,452 3,452 206 0.0720
2015-05-11 2015-03-31 13F MERCK & CO INC COM 58933Y105 0 -6,602 -100.00 0 -100.00
2015-02-10 2014-12-31 13F MERCK & CO INC COM 58933Y105 6,602 -259 -3.77 375 -7.86 0.2023
2014-11-10 2014-09-30 13F MERCK & CO INC COM 58933Y105 6,861 37 0.54 407 3.04 0.3050
2014-07-31 2014-06-30 13F MERCK & CO INC COM 58933Y105 6,824 -520 -7.08 395 -5.73 0.3425
2014-05-08 2014-03-31 13F/A-1 MERCK & CO INC COM 58933Y105 7,344 -60 -0.81 419 12.94 0.3250
2014-05-02 2014-03-31 13F MERCK & CO INC COM 58933Y105 7,344 419
2014-02-04 2013-12-31 13F MERCK & CO INC COM 58933Y105 7,404 7,404 371 0.3934
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.