Merck & Co., Inc.
BG ˙ BUL ˙ US58933Y1055
SecurityBG:6MK / Merck & Co., Inc.
InstitutionAtlas Brown,Inc.
Latest Disclosed Ownership16,215 shares
Latest Disclosed Value $ 1,950,471
Atlas Brown,Inc. reports 0.07% increase in ownership of 6MK / Merck & Co., Inc.

On April 17, 2026 - Atlas Brown,Inc. filed a 13F-HR form disclosing ownership of 16,215 shares of Merck & Co., Inc. (BG:6MK) valued at $1,950,471 USD as of March 31, 2026. The entity filed a previous 13F-HR on January 9, 2026 disclosing 16,204 shares of Merck & Co., Inc.. This represents a change in shares of 0.07% 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)
2026-04-17 2026-03-31 13F MERCK & CO INC COM Stock 58933Y105 16,215 11 0.07 1,950 14.37 0.5828
2026-01-09 2025-12-31 13F MERCK & CO INC COM Stock 58933Y105 16,204 8 0.05 1,706 25.46 0.5071
2025-10-17 2025-09-30 13F MERCK & CO INC COM Stock 58933Y105 16,196 58 0.36 1,359 6.42 0.4018
2025-07-08 2025-06-30 13F MERCK & CO INC COM Stock 58933Y105 16,138 143 0.89 1,277 -11.01 0.4101
2025-04-08 2025-03-31 13F MERCK & CO INC COM Stock 58933Y105 15,995 -286 -1.76 1,436 -11.37 0.5038
2025-01-10 2024-12-31 13F MERCK & CO INC COM Stock 58933Y105 16,281 613 3.91 1,620 -8.99 0.5539
2024-10-18 2024-09-30 13F MERCK & CO INC COM Stock 58933Y105 15,668 70 0.45 1,779 -7.82 0.6164
2024-07-23 2024-06-30 13F MERCK & CO INC COM Stock 58933Y105 15,598 -841 -5.12 1,931 -11.02 0.6924
2024-04-08 2024-03-31 13F MERCK & CO INC COM Stock 58933Y105 16,439 939 6.06 2,169 28.42 0.7896
2024-01-18 2023-12-31 13F MERCK & CO INC COM Stock 58933Y105 15,500 -62 -0.40 1,690 5.43 0.7004
2023-10-17 2023-09-30 13F MERCK & CO INC COM Stock 58933Y105 15,562 76 0.49 1,602 -10.30 0.7307
2023-07-18 2023-06-30 13F MERCK & CO INC COM Stock 58933Y105 15,486 6 0.04 1,787 8.51 0.7862
2023-04-21 2023-03-31 13F MERCK & CO INC COM Stock 58933Y105 15,480 206 1.35 1,647 -2.83 0.7592
2023-01-05 2022-12-31 13F MERCK & CO INC COM Stock 58933Y105 15,274 -2,789 -15.44 1,695 8.87 0.8327
2022-10-06 2022-09-30 13F MERCK & CO INC COM Stock 58933Y105 18,063 90 0.50 1,556 -5.06 0.7928
2022-07-15 2022-06-30 13F MERCK & CO INC COM Stock 58933Y105 17,973 184 1.03 1,639 12.26 0.7746
2022-04-14 2022-03-31 13F MERCK & CO INC COM Stock 58933Y105 17,789 13 0.07 1,460 7.20 0.5954
2022-01-18 2021-12-31 13F MERCK & CO INC COM Stock 58933Y105 17,776 352 2.02 1,362 4.05 0.5277
2021-10-14 2021-09-30 13F MERCK & CO INC COM Stock 58933Y105 17,424 60 0.35 1,309 -3.04 0.5689
2021-07-19 2021-06-30 13F MERCK & CO INC COM Stock 58933Y105 17,364 12 0.07 1,350 0.90 0.5835
2021-04-13 2021-03-31 13F MERCK & CO. INC COM Stock 58933Y105 17,352 935 5.70 1,338 -0.37 0.6340
2021-01-19 2020-12-31 13F MERCK & CO. INC COM Stock 58933Y105 16,417 307 1.91 1,343 0.52 0.6945
2020-10-15 2020-09-30 13F MERCK & CO. INC COM Stock 58933Y105 16,110 -189 -1.16 1,336 6.20 0.7902
2020-07-21 2020-06-30 13F MERCK & CO. INC COM Stock 58933Y105 16,299 2,149 15.19 1,258 15.52 0.7980
2020-04-16 2020-03-31 13F MERCK & CO. INC COM Stock 58933Y105 14,150 280 2.02 1,089 -13.71 0.8509
2020-01-14 2019-12-31 13F MERCK & CO INC COM Stock 58933Y105 13,870 1,633 13.34 1,262 22.52 0.7893
2019-10-29 2019-09-30 13F MERCK & CO INC COM Stock 58933Y105 12,237 -1,587 -11.48 1,030 -11.13 0.7355
2019-07-24 2019-06-30 13F MERCK & CO INC COM Stock 58933Y105 13,824 9 0.07 1,159 0.87 0.8008
2019-04-12 2019-03-31 13F MERCK & CO INC COM Stock 58933Y105 13,815 -1,065 -7.16 1,149 1.06 0.8138
2019-01-28 2018-12-31 13F MERCK & CO INC COM Stock 58933Y105 14,880 -80 -0.53 1,137 7.16 0.8768
2018-10-26 2018-09-30 13F MERCK & CO INC COM Stock 58933Y105 14,960 -1,000 -6.27 1,061 6.74 0.6516
2018-07-11 2018-06-30 13F MERCK & CO INC COM Stock 58933Y105 15,960 220 1.40 994 15.99 0.2318
2018-04-17 2018-03-31 13F MERCK & CO INC COM COM 58933Y105 15,740 1,000 6.78 857 -4.99 0.1559
2018-01-25 2017-12-31 13F MERCK & CO INC COM Stock 58933Y105 14,740 463 3.24 902 -1.31 0.1610
2017-10-12 2017-09-30 13F MERCK & CO INC COM Stock 58933Y105 14,277 4,999 53.88 914 53.61 0.1941
2017-07-18 2017-06-30 13F MERCK & CO INC COM Stock 58933Y105 9,278 888 10.58 595 11.63 0.5209
2017-04-06 2017-03-31 13F MERCK & CO INC COM Stock 58933Y105 8,390 13 0.16 533 1.91 0.4207
2017-02-01 2016-12-31 13F MERCK & CO INC COM COM 58933Y105 8,377 0 0.00 523 0.00 0.2154
2016-10-19 2016-09-30 13F MERCK & CO INC COM Stock 58933Y105 8,377 372 4.65 523 13.45 0.2154
2016-07-28 2016-06-30 13F MERCK & CO INC COM Stock 58933Y105 8,005 -1,509 -15.86 461 -8.35 0.1868
2016-04-11 2016-03-31 13F MERCK & CO INC NEW COM Stock 58933Y105 9,514 440 4.85 503 10.07 0.2105
2016-01-28 2015-12-31 13F MERCK Stock 58933Y105 9,074 -528 -5.50 457 -3.59 0.2909
2015-11-05 2015-09-30 13F MERCK & CO INC NEW COM Stock 58933Y105 9,602 0 0.00 474 -15.51 0.2040
2015-08-11 2015-06-30 13F MERCK Stock 58933Y105 9,602 1,403 17.11 561 19.11 0.2182
2015-04-20 2015-03-31 13F Merck COM 58933Y105 8,199 8,199 0.00 471 0.1266
2015-01-30 2014-12-31 13F Merck COM 58933Y105 0 -7,253 -100.00 0 -100.00
2014-11-12 2014-09-30 13F Merck COM 58933Y105 7,253 -223 -2.98 430 -0.46 0.1594
2014-08-19 2014-06-30 13F Merck COM 58933Y105 7,476 1,562 26.41 432 28.57 0.2134
2014-05-07 2014-03-31 13F Merck COM 58933Y105 5,914 476 8.75 336 23.53 0.1811
2014-01-24 2013-12-31 13F Merck COM 58933Y105 5,438 1,115 25.79 272 32.04 0.1904
2013-10-31 2013-09-30 13F Merck COM 58933Y105 4,323 -1,793 -29.32 206 -27.46 0.1544
2013-08-21 2013-06-30 13F Merck COM 58933Y105 6,116 6,116 284 0.0607
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.