Merck & Co., Inc.
BG ˙ BUL ˙ US58933Y1055
SecurityBG:6MK / Merck & Co., Inc.
InstitutionHm Payson & Co
Latest Disclosed Ownership189,740 shares
Latest Disclosed Value $ 22,823,873
Hm Payson & Co reports 1.21% increase in ownership of 6MK / Merck & Co., Inc.

On April 13, 2026 - Hm Payson & Co filed a 13F-HR form disclosing ownership of 189,740 shares of Merck & Co., Inc. (BG:6MK) valued at $22,823,873 USD as of March 31, 2026. The entity filed a previous 13F-HR on February 12, 2026 disclosing 187,478 shares of Merck & Co., Inc.. This represents a change in shares of 1.21% 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)
2026-04-13 2026-03-31 13F MERCK COM 58933Y105 189,740 2,262 1.21 22,824 15.66 0.1711
2026-02-12 2025-12-31 13F MERCK COM 58933Y105 187,478 -3,712 -1.94 19,734 22.98 0.2783
2025-10-17 2025-09-30 13F MERCK COM 58933Y105 191,190 -6,181 -3.13 16,047 2.71 0.2307
2025-10-17 2025-06-30 13F MERCK COM 58933Y105 197,371 -13,573 -6.43 15,624 -17.49 0.2474
2025-04-29 2025-03-31 13F MERCK COM 58933Y105 210,944 -106,176 -33.48 18,934 -39.99 0.3323
2025-02-07 2024-12-31 13F MERCK COM 58933Y105 317,120 -333,686 -51.27 31,549 -57.31 0.5352
2024-10-28 2024-09-30 13F MERCK COM 58933Y105 650,806 93,401 16.76 73,908 7.10 1.2674
2024-08-13 2024-06-30 13F MERCK COM 58933Y105 557,405 3,056 0.55 69,007 -5.66 1.2536
2024-06-20 2024-03-31 13F MERCK COM 58933Y105 554,349 -16,175 -2.84 73,146 17.60 1.3592
2024-02-13 2023-12-31 13F MERCK COM 58933Y105 570,524 46,666 8.91 62,199 15.33 1.2881
2023-11-06 2023-09-30 13F MERCK COM 58933Y105 523,858 241,222 85.35 53,931 65.37 1.2642
2023-07-17 2023-06-30 13F MERCK COM 58933Y105 282,636 9,177 3.36 32,613 12.10 0.7322
2023-04-18 2023-03-31 13F MERCK COM 58933Y105 273,459 12,535 4.80 29,093 0.50 0.6977
2023-02-06 2022-12-31 13F MERCK COM 58933Y105 260,924 50,527 24.02 28,950 59.77 0.7210
2022-10-25 2022-09-30 13F MERCK COM 58933Y105 210,397 -7,468 -3.43 18,119 -8.78 0.4974
2022-08-15 2022-06-30 13F MERCK COM 58933Y105 217,865 -2,399 -1.09 19,863 9.91 0.5092
2022-05-12 2022-03-31 13F MERCK COM 58933Y105 220,264 -809 -0.37 18,072 6.66 0.4112
2022-02-15 2021-12-31 13F MERCK COM 58933Y105 221,073 -13,180 -5.63 16,943 -3.71 0.3683
2021-11-30 2021-09-30 13F MERCK COM 58933Y105 234,253 -64,410 -21.57 17,595 -24.25 0.4283
2021-08-17 2021-06-30 13F MERCK COM 58933Y105 298,663 -6,943 -2.27 23,227 -1.41 0.5662
2021-06-15 2021-03-31 13F MERCK & CO. COM 58933Y105 305,606 -9,608 -3.05 23,559 -8.63 0.6271
2021-03-10 2020-12-31 13F MERCK & CO. COM 58933Y105 315,214 -3,910 -1.23 25,785 -2.59 0.7126
2020-12-21 2020-09-30 13F MERCK & CO. COM 58933Y105 319,124 33,855 11.87 26,471 20.00 0.8152
2020-08-13 2020-06-30 13F MERCK & CO. COM 58933Y105 285,269 -13,917 -4.65 22,060 -4.17 0.7398
2020-07-01 2020-03-31 13F MERCK & CO. COM 58933Y105 299,186 -9,217 -2.99 23,019 -17.93 0.9044
2020-02-18 2019-12-31 13F MERCK COM 58933Y105 308,403 1,097 0.36 28,049 8.43 0.9009
2019-11-12 2019-09-30 13F MERCK COM 58933Y105 307,306 11,604 3.92 25,869 4.33 0.9112
2019-08-15 2019-06-30 13F MERCK COM 58933Y105 295,702 -3,200 -1.07 24,795 -0.26 0.8893
2019-07-31 2019-03-31 13F MERCK COM 58933Y105 298,902 295,032 7,623.57 24,860 -16.01 0.9502
2019-02-15 2018-12-31 13F MERCK COMMON STOCK 58933Y105 3,870 -321,592 -98.81 29,600 28.21 0.8680
2018-11-30 2018-09-30 13F MERCK COMMON STOCK 58933Y105 325,462 -74,346 -18.60 23,088 -4.87 1.0336
2018-08-27 2018-06-30 13F MERCK COMMON STOCK 58933Y105 399,808 -1,226 -0.31 24,269 11.10 1.0371
2018-05-14 2018-03-31 13F MERCK COMMON STOCK 58933Y105 401,034 21,890 5.77 21,844 2.39 0.9013
2018-02-16 2017-12-31 13F MERCK COMMON STOCK 58933Y105 379,144 19,108 5.31 21,335 -7.45 0.8575
2017-11-06 2017-09-30 13F MERCK COMMON STOCK 58933Y105 360,036 -2,164 -0.60 23,053 -0.69 0.9914
2017-08-04 2017-06-30 13F MERCK COMMON STOCK 58933Y105 362,200 -4,522 -1.23 23,214 -0.38 1.0463
2017-05-25 2017-03-31 13F MERCK COMMON STOCK 58933Y105 366,722 -297 -0.08 23,302 7.85 1.0626
2017-02-15 2016-12-31 13F MERCK COMMON STOCK 58933Y105 367,019 2,170 0.59 21,606 -5.12 1.0293
2016-11-14 2016-09-30 13F MERCK COMMON STOCK 58933Y105 364,849 -3,742 -1.02 22,771 7.23 1.1108
2016-08-08 2016-06-30 13F MERCK COMMON STOCK 58933Y105 368,591 23,437 6.79 21,235 16.27 1.0601
2016-05-19 2016-03-31 13F MERCK COMMON STOCK 58933Y105 345,154 14,419 4.36 18,263 4.55 0.9495
2016-02-23 2015-12-31 13F MERCK COMMON STOCK 58933Y105 330,735 53,980 19.50 17,469 27.80 0.8980
2015-11-02 2015-09-30 13F MERCK COMMON STOCK 58933Y105 276,755 -14,109 -4.85 13,669 -17.45 0.7408
2015-08-11 2015-06-30 13F MERCK COMMON STOCK 58933Y105 290,864 -3,433 -1.17 16,559 -2.12 0.8240
2015-05-06 2015-03-31 13F MERCK COMMON STOCK 58933Y105 294,297 -2,647 -0.89 16,917 0.32 0.8454
2015-02-10 2014-12-31 13F MERCK COMMON STOCK 58933Y105 296,944 2,071 0.70 16,863 -3.53 0.8348
2014-11-12 2014-09-30 13F MERCK COMMON STOCK 58933Y105 294,873 -39,197 -11.73 17,480 -9.55 0.8956
2014-08-13 2014-06-30 13F MERCK COMMON STOCK 58933Y105 334,070 -11,335 -3.28 19,326 -1.44 0.9929
2014-05-07 2014-03-31 13F MERCK COMMON STOCK 58933Y105 345,405 -10,707 -3.01 19,609 10.02 1.0378
2014-02-10 2013-12-31 13F MERCK COMMON STOCK 58933Y105 356,112 -3,730 -1.04 17,823 4.04 0.9548
2013-11-13 2013-09-30 13F MERCK COMMON STOCK 58933Y105 359,842 -5,613 -1.54 17,131 0.92 0.9933
2013-08-13 2013-06-30 13F MERCK COMMON STOCK 58933Y105 365,455 365,455 16,975 1.0189
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.