Merck & Co., Inc.
MX ˙ BMV ˙ US58933Y1055
SecurityMX:MRK / Merck & Co., Inc.
InstitutionKLCM Advisors, Inc.
Latest Disclosed Ownership13,489 shares
Latest Disclosed Value $ 1,622,624
KLCM Advisors, Inc. reports 1.46% decrease in ownership of MRK / Merck & Co., Inc.

On April 30, 2026 - KLCM Advisors, Inc. filed a 13F-HR form disclosing ownership of 13,489 shares of Merck & Co., Inc. (MX:MRK) valued at $1,622,624 USD as of March 31, 2026. The entity filed a previous 13F-HR on February 4, 2026 disclosing 13,689 shares of Merck & Co., Inc.. This represents a change in shares of -1.46% 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)
2026-04-30 2026-03-31 13F MERCK COM 58933Y105 13,489 -200 -1.46 1,623 12.64 0.1369
2026-02-04 2025-12-31 13F MERCK COM 58933Y105 13,689 304 2.27 1,441 28.23 0.1237
2025-11-13 2025-09-30 13F Merck COM 58933Y105 13,385 548 4.27 1,123 10.53 0.1120
2025-08-04 2025-06-30 13F Merck COM 58933Y105 12,837 -999 -7.22 1,016 -18.13 0.1080
2025-05-13 2025-03-31 13F Merck COM 58933Y105 13,836 104 0.76 1,242 -9.15 0.1453
2025-01-31 2024-12-31 13F Merck COM 58933Y105 13,732 381 2.85 1,366 -9.89 0.1584
2024-11-07 2024-09-30 13F Merck COM 58933Y105 13,351 287 2.20 1,516 -6.25 0.1799
2024-08-14 2024-06-30 13F Merck COM 58933Y105 13,064 206 1.60 1,617 -4.66 0.1998
2024-05-16 2024-03-31 13F Merck COM 58933Y105 12,858 70 0.55 1,697 21.66 0.2179
2024-01-31 2023-12-31 13F Merck COM 58933Y105 12,788 -40 -0.31 1,394 5.61 0.2152
2023-11-07 2023-09-30 13F Merck COM 58933Y105 12,828 133 1.05 1,321 -9.84 0.2483
2023-08-09 2023-06-30 13F Merck COM 58933Y105 12,695 279 2.25 1,465 10.91 0.2867
2023-05-11 2023-03-31 13F Merck COM 58933Y105 12,416 -63,020 -83.54 1,321 -84.23 0.2620
2023-02-10 2022-12-31 13F Merck COM 58933Y105 75,436 -84,427 -52.81 8,370 -39.21 1.7004
2022-11-14 2022-09-30 13F Merck COM 58933Y105 159,863 -2,080 -1.28 13,767 -6.75 3.2324
2022-08-04 2022-06-30 13F Merck COM 58933Y105 161,943 -115,247 -41.58 14,764 -35.08 3.2851
2022-05-03 2022-03-31 13F Merck COM 58933Y105 277,190 8,161 3.03 22,743 10.31 4.8137
2022-01-31 2021-12-31 13F Merck COM 58933Y105 269,029 -1,252 -0.46 20,618 1.56 4.4903
2021-11-16 2021-09-30 13F Merck COM 58933Y105 270,281 -4,104 -1.50 20,301 -4.86 4.3609
2021-08-03 2021-06-30 13F Merck COM 58933Y105 274,385 90,615 49.31 21,339 50.62 4.7221
2021-04-21 2021-03-31 13F Merck COM 58933Y105 183,770 20,062 12.25 14,167 5.79 3.2135
2021-01-26 2020-12-31 13F Merck COM 58933Y105 163,708 -4,608 -2.74 13,391 -4.09 3.3239
2020-11-03 2020-09-30 13F Merck COM 58933Y105 168,316 -17,038 -9.19 13,962 -2.59 4.0655
2020-07-27 2020-06-30 13F Merck COM 58933Y105 185,354 -9,038 -4.65 14,333 -4.17 4.0771
2020-05-13 2020-03-31 13F Merck COM 58933Y105 194,392 -1,530 -0.78 14,957 -16.06 4.7373
2020-02-04 2019-12-31 13F Merck COM 58933Y105 195,922 -8,013 -3.93 17,819 3.80 3.9533
2019-11-12 2019-09-30 13F/A-2 Merck COM 58933Y105 203,935 -2,190 -1.06 17,167 -0.68 4.3749
2019-11-04 2019-09-30 13F/A-1 Merck COM 58933Y105 188,810 -15,125 15,894 4.3528
2019-11-01 2019-09-30 13F Merck COM 58933Y105 185,385 15,606
2019-08-15 2019-06-30 13F Merck COM 58933Y105 206,125 -2,979 -1.42 17,284 -0.62 4.2542
2019-05-14 2019-03-31 13F Merck COM 58933Y105 209,104 -80,138 -27.71 17,391 -21.31 4.2771
2019-02-14 2018-12-31 13F Merck COM 58933Y105 289,242 -7,281 -2.46 22,101 5.07 6.4731
2018-11-14 2018-09-30 13F Merck COM 58933Y105 296,523 -7,263 -2.39 21,035 14.07 5.1729
2018-08-09 2018-06-30 13F Merck COM 58933Y105 303,786 -2,915 -0.95 18,440 10.38 4.8613
2018-05-10 2018-03-31 13F Merck COM 58933Y105 306,701 5,012 1.66 16,706 -1.59 4.5312
2018-02-15 2017-12-31 13F Merck COM 58933Y105 301,689 8,429 2.87 16,976 -9.59 4.1686
2017-11-14 2017-09-30 13F Merck COM 58933Y105 293,260 -9,684 -3.20 18,777 -3.29 4.9034
2017-08-15 2017-06-30 13F Merck COM 58933Y105 302,944 11,475 3.94 19,416 4.84 5.2990
2017-05-09 2017-03-31 13F Merck COM 58933Y105 291,469 128,943 79.34 18,520 93.56 5.2272
2017-02-13 2016-12-31 13F Merck COM 58933Y105 162,526 152,196 1,473.34 9,568 1,383.41 2.8146
2016-11-09 2016-09-30 13F Merck COM 58933Y105 10,330 -4,285 -29.32 645 -23.40 0.2053
2016-08-08 2016-06-30 13F Merck COM 58933Y105 14,615 2,000 15.85 842 26.24 0.2912
2016-04-27 2016-03-31 13F Merck COM 58933Y105 12,615 7,250 135.14 667 135.69 0.2316
2016-02-11 2015-12-31 13F Merck COM 58933Y105 5,365 -200 -3.59 283 2.91 0.1022
2015-11-12 2015-09-30 13F Merck Com 58933Y105 5,565 -1,192 -17.64 275 -28.57 0.0973
2015-08-24 2015-06-30 13F Merck Com 58933Y105 6,757 -90 -1.31 385 -2.28 0.0971
2015-05-13 2015-03-31 13F Merck Com 58933Y105 6,847 6,847 0.00 394 0.1094
2015-02-03 2014-12-31 13F Merck Com 58933Y105 0 -5,525 -100.00 0 -100.00
2014-11-12 2014-09-30 13F Merck Com 58933Y105 5,525 0 0.00 328 2.50 0.0868
2014-08-06 2014-06-30 13F Merck Com 58933Y105 5,525 0 0.00 320 1.91 0.0747
2014-05-14 2014-03-31 13F Merck Com 58933Y105 5,525 -1,175 -17.54 314 -6.27 0.0837
2014-02-11 2013-12-31 13F Merck Com 58933Y105 6,700 546 8.87 335 14.33 0.0915
2013-11-18 2013-09-30 13F Merck Com 58933Y105 6,154 590 10.60 293 13.57 0.0835
2013-08-13 2013-06-30 13F Merck Com 58933Y105 5,564 5,564 258 0.0813
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.