Merck & Co., Inc.
MX ˙ BMV ˙ US58933Y1055
SecurityMX:MRK / Merck & Co., Inc.
InstitutionRodgers Brothers Inc.
Latest Disclosed Ownership102,245 shares
Latest Disclosed Value $ 12,299,051
Rodgers Brothers Inc. reports 21.54% decrease in ownership of MRK / Merck & Co., Inc.

On May 14, 2026 - Rodgers Brothers Inc. filed a 13F-HR form disclosing ownership of 102,245 shares of Merck & Co., Inc. (MX:MRK) valued at $12,299,051 USD as of March 31, 2026. The entity filed a previous 13F-HR on February 13, 2026 disclosing 130,316 shares of Merck & Co., Inc.. This represents a change in shares of -21.54% 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)
2026-05-14 2026-03-31 13F MERCK COM 58933Y105 102,245 -28,071 -21.54 12,299 -10.34 1.4210
2026-02-13 2025-12-31 13F MERCK COM 58933Y105 130,316 -2,970 -2.23 13,717 22.63 1.6420
2025-11-12 2025-09-30 13F MERCK COM 58933Y105 133,286 -2,326 -1.72 11,187 4.20 1.3781
2025-08-14 2025-06-30 13F MERCK COM 58933Y105 135,612 2,977 2.24 10,735 -9.83 1.3547
2025-05-14 2025-03-31 13F MERCK COM 58933Y105 132,635 3,441 2.66 11,905 -7.37 1.5851
2025-02-12 2024-12-31 13F MERCK COM 58933Y105 129,194 18,697 16.92 12,852 2.42 1.6763
2024-11-14 2024-09-30 13F MERCK COM 58933Y105 110,497 28,688 35.07 12,548 23.91 1.5935
2024-08-14 2024-06-30 13F MERCK COM 58933Y105 81,809 -475 -0.58 10,128 -6.72 1.3715
2024-05-14 2024-03-31 13F MERCK COM 58933Y105 82,284 -19,829 -19.42 10,857 -2.47 1.4821
2024-02-13 2023-12-31 13F MERCK COM 58933Y105 102,113 23,078 29.20 11,132 36.82 1.7570
2023-11-13 2023-09-30 13F MERCK COM 58933Y105 79,035 9,257 13.27 8,137 1.06 1.3888
2023-08-14 2023-06-30 13F MERCK COM 58933Y105 69,778 8,638 14.13 8,052 23.79 1.4176
2023-05-15 2023-03-31 13F MERCK COM 58933Y105 61,140 2,062 3.49 6,505 -0.76 1.2490
2023-02-14 2022-12-31 13F MERCK COM 58933Y105 59,078 -47 -0.08 6,555 28.71 1.3174
2022-11-14 2022-09-30 13F MERCK COM 58933Y105 59,125 925 1.59 5,092 -4.03 1.0849
2022-08-15 2022-06-30 13F MERCK COM 58933Y105 58,200 -24,956 -30.01 5,306 -22.23 1.0486
2022-05-16 2022-03-31 13F MERCK COM 58933Y105 83,156 50 0.06 6,823 7.13 1.2250
2022-02-14 2021-12-31 13F MERCK COM 58933Y105 83,106 -6,839 -7.60 6,369 -5.73 1.1337
2021-11-15 2021-09-30 13F MERCK COM 58933Y105 89,945 1,000 1.12 6,756 -2.33 1.3471
2021-08-16 2021-06-30 13F MERCK COM 58933Y105 88,945 -825 -0.92 6,917 -0.04 1.3241
2021-05-17 2021-03-31 13F MERCK COM 58933Y105 89,770 15,600 21.03 6,920 14.06 1.4309
2021-02-16 2020-12-31 13F MERCK COM 58933Y105 74,170 4,825 6.96 6,067 5.48 1.3890
2020-11-13 2020-09-30 13F MERCK COM 58933Y105 69,345 10,913 18.68 5,752 27.28 1.4875
2020-08-13 2020-06-30 13F MERCK COM 58933Y105 58,432 -285 -0.49 4,519 0.02 1.2249
2020-05-14 2020-03-31 13F MERCK COM 58933Y105 58,717 6,963 13.45 4,518 -4.02 1.4335
2020-02-13 2019-12-31 13F MERCK COM 58933Y105 51,754 790 1.55 4,707 9.72 1.2242
2019-11-14 2019-09-30 13F MERCK COM 58933Y105 50,964 -5,310 -9.44 4,290 -9.09 1.1880
2019-08-14 2019-06-30 13F MERCK COM 58933Y105 56,274 1,305 2.37 4,719 3.22 1.3120
2019-05-15 2019-03-31 13F MERCK COM 58933Y105 54,969 -1,531 -2.71 4,572 5.91 1.3020
2019-02-14 2018-12-31 13F MERCK COM 58933Y105 56,500 112 0.20 4,317 7.93 1.3886
2018-11-14 2018-09-30 13F MERCK COM 58933Y105 56,388 11 0.02 4,000 16.89 1.1493
2018-08-14 2018-06-30 13F MERCK COM 58933Y105 56,377 3,115 5.85 3,422 17.96 1.0440
2018-05-15 2018-03-31 13F MERCK COM 58933Y105 53,262 5,971 12.63 2,901 9.02 0.9474
2018-02-14 2017-12-31 13F MERCK COM 58933Y105 47,291 25,740 119.44 2,661 92.83 0.8678
2017-11-08 2017-09-30 13F MERCK COM 58933Y105 21,551 1,402 6.96 1,380 6.89 0.4855
2017-08-14 2017-06-30 13F MERCK COM 58933Y105 20,149 2 0.01 1,291 0.86 0.4763
2017-05-15 2017-03-31 13F MERCK COM 58933Y105 20,147 3 0.01 1,280 7.93 0.4832
2017-02-14 2016-12-31 13F MERCK COM 58933Y105 20,144 -498 -2.41 1,186 -7.92 0.4650
2016-11-14 2016-09-30 13F MERCK COM 58933Y105 20,642 3 0.01 1,288 8.33 0.5176
2016-08-15 2016-06-30 13F MERCK COM 58933Y105 20,639 -103 -0.50 1,189 8.39 0.4896
2016-05-16 2016-03-31 13F MERCK COM 58933Y105 20,742 1,303 6.70 1,097 6.82 0.4775
2016-02-16 2015-12-31 13F MERCK COM 58933Y105 19,439 7,003 56.31 1,027 67.26 0.4799
2015-11-16 2015-09-30 13F MERCK COM 58933Y105 12,436 402 3.34 614 -10.36 0.3085
2015-08-14 2015-06-30 13F MERCK COM 58933Y105 12,034 4,550 60.80 685 59.30 0.3240
2015-05-15 2015-03-31 13F MERCK COM 58933Y105 7,484 0 0.00 430 1.18 0.2101
2015-02-17 2014-12-31 13F MERCK COM 58933Y105 7,484 0 0.00 425 -4.28 0.2121
2014-11-14 2014-09-30 13F MERCK COM 58933Y105 7,484 0 0.00 444 2.54 0.2318
2014-08-15 2014-06-30 13F MERCK COM 58933Y105 7,484 0 0.00 433 1.88 0.2143
2014-05-15 2014-03-31 13F MERCK COM 58933Y105 7,484 -3,661 -32.85 425 -23.84 0.2047
2014-02-13 2013-12-31 13F MERCK COM 58933Y105 11,145 5 0.04 558 5.28 0.2765
2013-11-13 2013-09-30 13F MERCK COM 58933Y105 11,140 2,309 26.15 530 29.27 0.2906
2013-08-14 2013-06-30 13F MERCK AND COM 58933Y105 8,831 8,831 410 0.2444
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.