Merck & Co., Inc.
MX ˙ BMV ˙ US58933Y1055
SecurityMX:MRK / Merck & Co., Inc.
InstitutionNoesis Capital Mangement Corp
Latest Disclosed Ownership135,684 shares
Latest Disclosed Value $ 16,321,393
Noesis Capital Mangement Corp reports 2.86% increase in ownership of MRK / Merck & Co., Inc.

On May 5, 2026 - Noesis Capital Mangement Corp filed a 13F-HR form disclosing ownership of 135,684 shares of Merck & Co., Inc. (MX:MRK) valued at $16,321,393 USD as of March 31, 2026. The entity filed a previous 13F-HR on February 5, 2026 disclosing 131,913 shares of Merck & Co., Inc.. This represents a change in shares of 2.86% 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.

Upgrade to unlock premium data and export to Excel .

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)
2026-05-05 2026-03-31 13F MERCK COM 58933Y105 135,684 3,771 2.86 16,321 17.54 2.4130
2026-02-05 2025-12-31 13F MERCK COM 58933Y105 131,913 2,882 2.23 13,885 28.22 2.0136
2025-10-23 2025-09-30 13F MERCK COM 58933Y105 129,031 2,696 2.13 10,830 8.29 1.6811
2025-08-04 2025-06-30 13F MERCK COM 58933Y105 126,335 8,620 7.32 10,001 -5.36 1.7368
2025-05-07 2025-03-31 13F/A-1 MERCK COM 58933Y105 117,715 2,875 2.50 10,566 -7.51 2.1015
2025-05-06 2025-03-31 13F MERCK COM 58933Y105 117,715 2,875 10,566 2.1015
2025-02-05 2024-12-31 13F MERCK COM 58933Y105 114,840 2,689 2.40 11,424 -10.29 2.1800
2024-11-14 2024-09-30 13F MERCK COM 58933Y105 112,151 11,031 10.91 12,736 1.73 2.5279
2024-08-05 2024-06-30 13F Merck COMMON STOCKS 58933Y105 101,120 -103 -0.10 12,519 -6.27 2.7757
2024-05-03 2024-03-31 13F Merck COMMON STOCKS 58933Y105 101,223 -1,379 -1.34 13,356 19.41 2.9662
2024-02-06 2023-12-31 13F Merck COMMON STOCKS 58933Y105 102,602 -437 -0.42 11,186 5.45 2.6369
2023-11-03 2023-09-30 13F/A-1 Merck COMMON STOCKS 58933Y105 103,039 1,389 1.37 10,608 -9.57 2.7819
2023-11-03 2023-09-30 13F Merck COMMON STOCKS 58933Y105 103,039 1,389 10,608 2.7819
2023-07-31 2023-06-30 13F Merck COMMON STOCKS 58933Y105 101,650 90 0.09 11,729 8.55 2.8875
2023-05-08 2023-03-31 13F Merck COMMON STOCKS 58933Y105 101,560 97,984 2,740.04 10,805 2,621.66 2.7364
2023-02-02 2022-12-31 13F Merck COMMON STOCKS 58933Y105 3,576 -244 -6.39 397 20.67 0.1128
2022-11-01 2022-09-30 13F Merck COMMON STOCKS 58933Y105 3,820 -244 -6.00 329 -11.32 0.0997
2022-07-29 2022-06-30 13F Merck COMMON STOCKS 58933Y105 4,064 -5,407 -57.09 371 -52.25 0.1101
2022-05-05 2022-03-31 13F Merck COMMON STOCKS 58933Y105 9,471 -5,356 -36.12 777 -31.60 0.1869
2022-02-03 2021-12-31 13F Merck COMMON STOCKS 58933Y105 14,827 -5,160 -25.82 1,136 -24.32 0.2289
2021-11-04 2021-09-30 13F Merck COMMON STOCKS 58933Y105 19,987 1,650 9.00 1,501 4.89 0.2932
2021-08-05 2021-06-30 13F Merck COMMON STOCKS 58933Y105 18,337 -26 -0.14 1,431 1.06 0.2925
2021-05-06 2021-03-31 13F Merck COMMON STOCKS 58933Y105 18,363 789 4.49 1,416 -1.53 0.3180
2021-02-04 2020-12-31 13F Merck COMMON STOCKS 58933Y105 17,574 110 0.63 1,438 -0.76 0.3553
2020-11-05 2020-09-30 13F Merck COMMON STOCKS 58933Y105 17,464 0 0.00 1,449 7.33 0.4103
2020-08-07 2020-06-30 13F Merck COMMON STOCKS 58933Y105 17,464 -87 -0.50 1,350 0.00 0.4268
2020-05-06 2020-03-31 13F Merck COMMON STOCKS 58933Y105 17,551 -600 -3.31 1,350 -18.23 0.4968
2020-02-07 2019-12-31 13F Merck COMMON STOCKS 58933Y105 18,151 -200 -1.09 1,651 6.86 0.4600
2019-11-05 2019-09-30 13F Merck COMMON STOCKS 58933Y105 18,351 193 1.06 1,545 1.44 0.4996
2019-08-06 2019-06-30 13F Merck COMMON STOCKS 58933Y105 18,158 552 3.14 1,523 4.03 0.5190
2019-05-09 2019-03-31 13F Merck COMMON STOCKS 58933Y105 17,606 -800 -4.35 1,464 4.13 0.5295
2019-02-08 2018-12-31 13F MERCK COM 58933Y105 18,406 0 0.00 1,406 7.66 0.5706
2018-11-15 2018-09-30 13F MERCK COM 58933Y105 18,406 0 0.00 1,306 16.92 0.4577
2018-08-13 2018-06-30 13F MERCK COM 58933Y105 18,406 48 0.26 1,117 11.70 0.4099
2018-05-07 2018-03-31 13F MERCK COM 58933Y105 18,358 -106 -0.57 1,000 -3.75 0.3706
2018-02-21 2017-12-31 13F/A-1 MERCK COM 58933Y105 18,464 82 0.45 1,039 -11.72 0.3738
2018-02-14 2017-12-31 13F MERCK COM 58933Y105 18,464 82 1,039
2017-11-07 2017-09-30 13F MERCK COM 58933Y105 18,382 -198 -1.07 1,177 -1.18 0.4417
2017-08-10 2017-06-30 13F MERCK COM 58933Y105 18,580 -416 -2.19 1,191 -1.33 0.4563
2017-05-10 2017-03-31 13F MERCK COM 58933Y105 18,996 1,542 8.83 1,207 17.41 0.4599
2017-02-08 2016-12-31 13F MERCK COM 58933Y105 17,454 1 0.01 1,028 -5.60 0.4292
2016-11-03 2016-09-30 13F MERCK COM 58933Y105 17,453 326 1.90 1,089 10.33 0.4688
2016-08-04 2016-06-30 13F MERCK COM 58933Y105 17,127 100 0.59 987 9.54 0.4392
2016-05-04 2016-03-31 13F MERCK & CO INC COM 58933Y105 17,027 130 0.77 901 1.01 0.4101
2016-02-08 2015-12-31 13F MERCK & CO INC COM 58933Y105 16,897 -300 -1.74 892 5.06 0.4239
2015-11-12 2015-09-30 13F MERCK & CO INC COM 58933Y105 17,197 0 0.00 849 -13.28 0.4491
2015-08-06 2015-06-30 13F MERCK & CO INC COM 58933Y105 17,197 -288 -1.65 979 -2.59 0.4220
2015-05-06 2015-03-31 13F Merck COMMON STOCKS 58933Y105 17,485 -570 -3.16 1,005 -1.95 0.4160
2015-02-10 2014-12-31 13F Merck COMMON STOCKS 58933Y105 18,055 -448 -2.42 1,025 -6.56 0.4296
2014-11-04 2014-09-30 13F Merck COMMON STOCKS 58933Y105 18,503 6,470 53.77 1,097 57.61 0.4772
2014-07-31 2014-06-30 13F Merck COMMON STOCKS 58933Y105 12,033 1,335 12.48 696 14.66 0.3142
2014-04-30 2014-03-31 13F Merck COMMON STOCKS 58933Y105 10,698 -350 -3.17 607 9.76 0.2982
2014-02-10 2013-12-31 13F Merck COM 58933Y105 11,048 -237 -2.10 553 0.2724
2013-11-06 2013-09-30 13F Merck COM 58933Y105 11,285 0 0.00 1 0.2831
2013-08-06 2013-06-30 13F Merck COM 58933Y105 11,285 11,285 1 0.2798
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.