默克公司
MX ˙ BMV ˙ US58933Y1055
SecurityMX:MRK / Merck & Co., Inc.
InstitutionAdirondack Trust Co
Latest Disclosed Ownership8,819 shares
Latest Disclosed Value $ 1,060,817
Adirondack Trust Co reports 2.16% decrease in ownership of MRK / Merck & Co., Inc.

On April 3, 2026 - Adirondack Trust Co filed a 13F-HR form disclosing ownership of 8,819 shares of Merck & Co., Inc. (MX:MRK) valued at $1,060,817 USD as of March 31, 2026. The entity filed a previous 13F-HR on January 8, 2026 disclosing 9,014 shares of Merck & Co., Inc.. This represents a change in shares of -2.16% 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)
2026-04-03 2026-03-31 13F MERCK HEALTHCARE 58933Y105 8,819 -195 -2.16 1,061 11.81 0.3564
2026-01-08 2025-12-31 13F MERCK HEALTHCARE 58933Y105 9,014 -596 -6.20 949 17.62 0.3121
2025-10-20 2025-09-30 13F MERCK HEALTHCARE 58933Y105 9,610 -218 -2.22 807 3.73 0.2705
2025-07-11 2025-06-30 13F MERCK HEALTHCARE 58933Y105 9,828 -412 -4.02 778 -15.45 0.2824
2025-04-03 2025-03-31 13F MERCK HEALTHCARE 58933Y105 10,240 -535 -4.97 919 -14.19 0.3592
2025-01-17 2024-12-31 13F MERCK HEALTHCARE 58933Y105 10,775 -116 -1.07 1,072 -13.35 0.4093
2024-10-08 2024-09-30 13F MERCK HEALTHCARE 58933Y105 10,891 -196 -1.77 1,237 -9.91 0.4764
2024-07-09 2024-06-30 13F MERCK HEALTHCARE 58933Y105 11,087 -80 -0.72 1,373 -6.86 0.5604
2024-04-09 2024-03-31 13F MERCK HEALTHCARE 58933Y105 11,167 -142 -1.26 1,473 2.51 0.6167
2024-03-29 2023-12-31 13F MERCK HEALTHCARE 58933Y105 11,309 -85 -0.75 1,438 22.61 0.6213
2023-10-31 2023-09-30 13F MERCK HEALTHCARE 58933Y105 11,394 -142 -1.23 1,173 -4.72 0.5854
2023-08-09 2023-06-30 13F MERCK HEALTHCARE 58933Y105 11,536 -351 -2.95 1,230 -2.69 0.5749
2023-04-28 2023-03-31 13F MERCK HEALTHCARE 58933Y105 11,887 -71 -0.59 1,265 -4.68 0.6405
2023-01-13 2022-12-31 13F MERCK HEALTHCARE 58933Y105 11,958 267 2.28 1,327 31.81 0.6863
2022-10-13 2022-09-30 13F MERCK HEALTHCARE 58933Y105 11,691 221 1.93 1,006 -3.82 0.5622
2022-07-06 2022-06-30 13F MERCK HEALTHCARE 58933Y105 11,470 802 7.52 1,046 19.41 0.5608
2022-04-05 2022-03-31 13F MERCK HEALTHCARE 58933Y105 10,668 1,780 20.03 876 28.63 0.4146
2022-01-13 2021-12-31 13F MERCK HEALTHCARE 58933Y105 8,888 30 0.34 681 -12.69 0.3248
2021-11-16 2021-09-30 13F MERCK HEALTHCARE 58933Y105 8,858 -85 -0.95 780 12.07 0.3710
2021-07-15 2021-06-30 13F MERCK HEALTHCARE 58933Y105 8,943 265 3.05 696 4.04 0.3511
2021-04-16 2021-03-31 13F MERCK HEALTHCARE 58933Y105 8,678 1,260 16.99 669 16.96 0.3562
2021-02-12 2020-12-31 13F MERCK HEALTHCARE 58933Y105 7,418 90 1.23 572 -5.77 0.3439
2020-10-05 2020-09-30 13F MERCK HEALTHCARE 58933Y105 7,328 -25 -0.34 607 2.88 0.3981
2020-08-19 2020-06-30 13F MERCK HEALTHCARE 58933Y105 7,353 0 0.00 590 4.42 0.3903
2020-04-23 2020-03-31 13F MERCK HEALTHCARE 58933Y105 7,353 -210 -2.78 565 -12.54 0.4612
2020-02-11 2019-12-31 13F MERCK HEALTHCARE 58933Y105 7,563 -2,185 -22.41 646 -21.32 0.4238
2019-10-09 2019-09-30 13F MERCK HEALTHCARE 58933Y105 9,748 -813 -7.70 821 -7.34 0.5765
2019-07-15 2019-06-30 13F MERCK HEALTHCARE 58933Y105 10,561 0 0.00 886 6.62 0.6183
2019-05-13 2019-03-31 13F MERCK HEALTHCARE 58933Y105 10,561 -305 -2.81 831 0.12 0.5703
2019-01-18 2018-12-31 13F MERCK HEALTHCARE 58933Y105 10,866 680 6.68 830 14.96 0.6427
2018-10-22 2018-09-30 13F MERCK HEALTHCARE 58933Y105 10,186 30 0.30 722 17.02 0.4869
2018-07-26 2018-06-30 13F MERCK HEALTHCARE 58933Y105 10,156 -100 -0.98 617 2.15 0.4352
2018-05-03 2018-03-31 13F MERCK HEALTHCARE 58933Y105 10,256 83 0.82 604 5.59 0.4300
2018-01-10 2017-12-31 13F MERCK HEALTHCARE 58933Y105 10,173 -290 -2.77 572 -14.63 0.4152
2017-10-12 2017-09-30 13F MERCK HEALTHCARE 58933Y105 10,463 -600 -5.42 670 -5.50 0.5260
2017-08-02 2017-06-30 13F MERCK HEALTHCARE 58933Y105 11,063 -271 -2.39 709 -1.53 0.5708
2017-04-12 2017-03-31 13F MERCK HEALTHCARE 58933Y105 11,334 41 0.36 720 8.27 0.5029
2017-01-17 2016-12-31 13F MERCK HEALTHCARE 58933Y105 11,293 342 3.12 665 -2.78 0.4634
2016-10-21 2016-09-30 13F MERCK HEALTHCARE 58933Y105 10,951 240 2.24 684 10.86 0.4921
2016-07-13 2016-06-30 13F MERCK HEALTHCARE 58933Y105 10,711 -475 -4.25 617 4.22 0.4392
2016-04-12 2016-03-31 13F MERCK HEALTHCARE 58933Y105 11,186 60 0.54 592 5.15 0.4392
2016-02-08 2015-12-31 13F MERCK HEALTHCARE 58933Y105 11,126 453 4.24 563 6.83 0.4454
2015-10-19 2015-09-30 13F MERCK HEALTHCARE 58933Y105 10,673 20 0.19 527 -13.18 0.4247
2015-07-30 2015-06-30 13F MERCK HEALTHCARE 58933Y105 10,653 20 0.19 607 -0.65 0.4524
2015-04-07 2015-03-31 13F MERCK HEALTHCARE 58933Y105 10,633 10,633 0.00 611 0.4567
2015-01-27 2014-12-31 13F MERCK HEALTHCARE 58933Y105 0 -10,288 -100.00 0 -100.00
2014-10-28 2014-09-30 13F MERCK HEALTHCARE 58933Y105 10,288 2,124 26.02 609 29.03 0.4619
2014-07-23 2014-06-30 13F MERCK HEALTHCARE 58933Y105 8,164 0 0.00 472 1.94 0.3608
2014-04-17 2014-03-31 13F MERCK HEALTHCARE 58933Y105 8,164 3,724 83.87 463 108.56 0.3692
2014-01-07 2013-12-31 13F MERCK HEALTHCARE 58933Y105 4,440 0 0.00 222 5.21 0.1799
2013-10-04 2013-09-30 13F MERCK HEALTHCARE 58933Y105 4,440 510 12.98 211 15.30 0.1857
2013-08-14 2013-06-30 13F MERCK HEALTHCARE 58933Y105 3,930 3,930 183 0.1664
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.