Merck & Co., Inc.
DE ˙ XTRA ˙ US58933Y1055
102,78 € ↑2,84 (2,84%)
2026-06-04
CENA AKCJI
SecurityDE:6MK / Merck & Co., Inc.
InstitutionPrentiss Smith & Co Inc
Latest Disclosed Ownership2,974 shares
Latest Disclosed Value $ 357,742
Prentiss Smith & Co Inc reports 0.54% decrease in ownership of 6MK / Merck & Co., Inc.

On May 7, 2026 - Prentiss Smith & Co Inc filed a 13F-HR form disclosing ownership of 2,974 shares of Merck & Co., Inc. (DE:6MK) valued at $309,891 USD as of March 31, 2026. The entity filed a previous 13F-HR on January 29, 2026 disclosing 2,990 shares of Merck & Co., Inc.. This represents a change in shares of -0.54% during the quarter. The current value of the position is $305,668 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)
2026-05-07 2026-03-31 13F MERCK COM 58933Y105 2,974 -16 -0.54 358 13.69 0.2077
2026-01-29 2025-12-31 13F MERCK COM 58933Y105 2,990 0 0.00 315 25.60 0.1880
2025-10-20 2025-09-30 13F MERCK COM 58933Y105 2,990 0 0.00 251 5.93 0.1417
2025-07-22 2025-06-30 13F MERCK COM 58933Y105 2,990 -100 -3.24 237 -14.80 0.1408
2025-04-21 2025-03-31 13F MERCK COM 58933Y105 3,090 0 0.00 277 -9.77 0.1798
2025-01-23 2024-12-31 13F MERCK COM 58933Y105 3,090 0 0.00 307 -12.29 0.2012
2024-10-21 2024-09-30 13F MERCK COM 58933Y105 3,090 -450 -12.71 351 -20.09 0.2248
2024-07-17 2024-06-30 13F MERCK COM 58933Y105 3,540 0 0.00 438 -6.21 0.3056
2024-04-30 2024-03-31 13F MERCK COM 58933Y105 3,540 -199 -5.32 467 14.74 0.3284
2024-02-02 2023-12-31 13F MERCK COM 58933Y105 3,739 0 0.00 408 5.99 0.3037
2023-10-24 2023-09-30 13F MERCK COM 58933Y105 3,739 -328 -8.06 385 -18.12 0.2838
2023-08-02 2023-06-30 13F MERCK COM 58933Y105 4,067 0 0.00 469 8.56 0.3521
2023-04-28 2023-03-31 13F MERCK COM 58933Y105 4,067 0 0.00 433 -4.21 0.3211
2023-01-31 2022-12-31 13F MERCK COM 58933Y105 4,067 0 0.00 451 28.86 0.4089
2022-10-21 2022-09-30 13F MERCK COM 58933Y105 4,067 0 0.00 350 -5.66 0.3112
2022-08-12 2022-06-30 13F MERCK COM 58933Y105 4,067 0 0.00 371 11.08 0.2862
2022-05-09 2022-03-31 13F MERCK COM 58933Y105 4,067 0 0.00 334 7.05 0.2003
2022-01-28 2021-12-31 13F MERCK COM 58933Y105 4,067 -80 -1.93 312 0.32 0.1473
2021-10-19 2021-09-30 13F MERCK COM 58933Y105 4,147 0 0.00 311 -3.72 0.1579
2021-07-15 2021-06-30 13F MERCK COM 58933Y105 4,147 0 0.00 323 0.94 0.1556
2021-06-21 2021-03-31 13F MERCK & CO. COM 58933Y105 4,147 -876 -17.44 320 -22.14 0.1644
2021-02-03 2020-12-31 13F MERCK & CO. COM 58933Y105 5,023 -778 -13.41 411 -14.55 0.1961
2020-11-02 2020-09-30 13F MERCK & CO. COM 58933Y105 5,801 145 2.56 481 10.07 0.2507
2020-07-13 2020-06-30 13F MERCK & CO. COM 58933Y105 5,656 0 0.00 437 0.46 0.2696
2020-04-29 2020-03-31 13F MERCK & CO. COM 58933Y105 5,656 440 8.44 435 -8.23 0.3019
2020-01-21 2019-12-31 13F MERCK COM 58933Y105 5,216 0 0.00 474 7.97 0.3044
2019-11-06 2019-09-30 13F MERCK COM 58933Y105 5,216 0 0.00 439 0.46 0.2943
2019-07-19 2019-06-30 13F MERCK COM 58933Y105 5,216 253 5.10 437 5.81 0.2851
2019-07-01 2019-03-31 13F MERCK COM 58933Y105 4,963 250 5.30 413 14.72 0.2625
2019-01-15 2018-12-31 13F MERCK COM 58933Y105 4,713 -80 -1.67 360 5.88 0.2266
2018-10-23 2018-09-30 13F MERCK COM 58933Y105 4,793 700 17.10 340 37.10 0.1938
2018-07-19 2018-06-30 13F MERCK COM 58933Y105 4,093 -1,560 -27.60 248 -19.48 0.1502
2018-04-20 2018-03-31 13F MERCK COM 58933Y105 5,653 122 2.21 308 -0.96 0.1614
2018-02-13 2017-12-31 13F Merck COMMON 589331107 5,531 0 0.00 311 -12.15 0.1517
2018-05-03 2017-09-30 13F/A-1 MERCK COM 58933Y105 5,531 0 0.00 354 0.00 0.2043
2017-10-23 2017-09-30 13F MERCK COM 58933Y105 5,531 0 354
2017-07-10 2017-06-30 13F Merck COMMON 589331107 5,531 700 14.49 354 15.31 0.1852
2017-04-13 2017-03-31 13F Merck COMMON 589331107 4,831 -126 -2.54 307 5.14 0.1740
2017-01-18 2016-12-31 13F Merck COMMON 589331107 4,957 0 0.00 292 -5.50 0.1780
2016-10-20 2016-09-30 13F Merck COMMON 589331107 4,957 -958 -16.20 309 -9.38 0.1727
2016-07-28 2016-06-30 13F Merck COMMON 589331107 5,915 -86 -1.43 341 7.23 0.1921
2016-05-02 2016-03-31 13F Merck COMMON 589331107 6,001 0 0.00 318 0.32 0.1832
2016-01-21 2015-12-31 13F Merck COMMON 589331107 6,001 700 13.21 317 20.99 0.1677
2015-10-26 2015-09-30 13F Merck COMMON 589331107 5,301 -700 -11.66 262 -23.39 0.1453
2015-07-20 2015-06-30 13F Merck COMMON 589331107 6,001 -133 -2.17 342 -3.12 0.1680
2015-05-01 2015-03-31 13F Merck COMMON 589331107 6,134 6,134 0.00 353 0.1687
2015-02-04 2014-12-31 13F Merck COMMON 589331107 0 -5,290 -100.00 0 -100.00
2014-10-27 2014-09-30 13F Merck COMMON 589331107 5,290 0 0.00 314 2.61 0.1566
2014-07-23 2014-06-30 13F Merck COMMON 589331107 5,290 0 0.00 306 2.00 0.1556
2014-04-16 2014-03-31 13F Merck COMMON 589331107 5,290 276 5.50 300 19.52 0.1591
2014-01-21 2013-12-31 13F Merck COMMON 589331107 5,014 -77 -1.51 251 3.72 0.1313
2013-11-01 2013-09-30 13F Merck COMMON 589331107 5,091 0 0.00 242 2.54 0.1255
2013-07-24 2013-06-30 13F Merck COMMON 589331107 5,091 5,091 236 0.1222
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.