Merck & Co., Inc.
MX ˙ BMV ˙ US58933Y1055
SecurityMX:MRK / Merck & Co., Inc.
InstitutionBoltwood Capital Management
Latest Disclosed Ownership5,843 shares
Latest Disclosed Value $ 702,854
Boltwood Capital Management reports 2.63% increase in ownership of MRK / Merck & Co., Inc.

On April 7, 2026 - Boltwood Capital Management filed a 13F-HR form disclosing ownership of 5,843 shares of Merck & Co., Inc. (MX:MRK) valued at $702,854 USD as of March 31, 2026. The entity filed a previous 13F-HR on January 2, 2026 disclosing 5,693 shares of Merck & Co., Inc.. This represents a change in shares of 2.63% 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)
2026-04-07 2026-03-31 13F MERCK COM 58933Y105 5,843 150 2.63 703 17.20 0.1793
2026-01-02 2025-12-31 13F MERCK COM 58933Y105 5,693 -60 -1.04 599 24.27 0.1558
2025-10-06 2025-09-30 13F MERCK COM 58933Y105 5,753 25 0.44 483 6.40 0.1285
2025-07-08 2025-06-30 13F MERCK COM 58933Y105 5,728 -55 -0.95 453 -12.72 0.1289
2025-04-10 2025-03-31 13F MERCK COM 58933Y105 5,783 45 0.78 519 -8.95 0.1578
2025-01-06 2024-12-31 13F MERCK COM 58933Y105 5,738 -100 -1.71 571 -13.90 0.1739
2024-10-02 2024-09-30 13F MERCK COM 58933Y105 5,838 75 1.30 663 -7.15 0.1965
2024-07-08 2024-06-30 13F MERCK COM 58933Y105 5,763 30 0.52 713 -5.69 0.2229
2024-04-04 2024-03-31 13F MERCK COM 58933Y105 5,733 -25 -0.43 756 20.57 0.2344
2024-01-05 2023-12-31 13F MERCK COM 58933Y105 5,758 -200 -3.36 628 2.28 0.2079
2023-10-10 2023-09-30 13F MERCK COM 58933Y105 5,958 -125 -2.05 613 -12.55 0.2272
2023-07-06 2023-06-30 13F MERCK COM 58933Y105 6,083 -150 -2.41 702 5.73 0.2531
2023-04-04 2023-03-31 13F MERCK COM 58933Y105 6,233 -50 -0.80 663 -4.88 0.2479
2023-01-06 2022-12-31 13F MERCK COM 58933Y105 6,283 -50 -0.79 697 27.89 0.2830
2022-10-04 2022-09-30 13F MERCK COM 58933Y105 6,333 0 0.00 545 -5.55 0.2495
2022-07-07 2022-06-30 13F MERCK COM 58933Y105 6,333 0 0.00 577 10.96 0.2498
2022-04-20 2022-03-31 13F MERCK COM 58933Y105 6,333 0 0.00 520 7.22 0.2009
2022-01-10 2021-12-31 13F MERCK COM 58933Y105 6,333 -1,706 -21.22 485 -19.70 0.1792
2021-10-08 2021-09-30 13F MERCK COM 58933Y105 8,039 -100 -1.23 604 -4.58 0.2436
2021-07-06 2021-06-30 13F MERCK & CO. COM 58933Y105 8,139 -100 -1.21 633 -0.31 0.2629
2021-04-05 2021-03-31 13F MERCK & CO. COM 58933Y105 8,239 -444 -5.11 635 -10.56 0.2820
2021-01-04 2020-12-31 13F MERCK & CO. COM 58933Y105 8,683 -152 -1.72 710 -3.14 0.3448
2020-10-05 2020-09-30 13F MERCK & CO. COM 58933Y105 8,835 0 0.00 733 7.32 0.4090
2020-07-02 2020-06-30 13F MERCK & CO. COM 58933Y105 8,835 0 0.00 683 0.44 0.4124
2020-04-07 2020-03-31 13F MERCK & CO. COM 58933Y105 8,835 -66 -0.74 680 -16.05 0.4813
2020-01-07 2019-12-31 13F MERCK COM 58933Y105 8,901 0 0.00 810 8.14 0.4544
2019-10-02 2019-09-30 13F MERCK COM 58933Y105 8,901 -200 -2.20 749 -1.83 0.4715
2019-07-01 2019-06-30 13F MERCK COM 58933Y105 9,101 0 0.00 763 0.79 0.4862
2019-04-02 2019-03-31 13F MERCK COM 58933Y105 9,101 -349 -3.69 757 4.85 0.4935
2019-01-07 2018-12-31 13F Merck COM 58933Y105 9,450 0 0.00 722 7.76 0.4941
2018-10-09 2018-09-30 13F Merck COM 58933Y105 9,450 0 0.00 670 16.93 0.3994
2018-07-06 2018-06-30 13F Merck COM 58933Y105 9,450 -358 -3.65 573 7.30 0.3732
2018-04-05 2018-03-31 13F Merck COM 58933Y105 9,808 -192 -1.92 534 -4.98 0.3657
2018-01-09 2017-12-31 13F Merck COM 58933Y105 10,000 0 0.00 562 -12.19 0.3438
2017-10-10 2017-09-30 13F Merck COM 58933Y105 10,000 0 0.00 640 0.00 0.4157
2017-07-07 2017-06-30 13F Merck COM 58933Y105 10,000 -300 -2.91 640 -2.14 0.4331
2017-04-06 2017-03-31 13F Merck COM 58933Y105 10,300 -10,145 -49.62 654 -45.64 0.4577
2017-01-09 2016-12-31 13F Merck COM 58933Y105 20,445 -100 -0.49 1,203 -6.16 0.9197
2016-10-05 2016-09-30 13F Merck COM 58933Y105 20,545 180 0.88 1,282 9.29 1.0288
2016-07-05 2016-06-30 13F Merck COM 58933Y105 20,365 415 2.08 1,173 11.08 0.9753
2016-04-14 2016-03-31 13F Merck COM 58933Y105 19,950 3,500 21.28 1,056 21.52 0.9296
2016-02-09 2015-12-31 13F Merck COM 58933Y105 16,450 600 3.79 869 10.98 0.7966
2015-10-14 2015-09-30 13F Merck COM 58933Y105 15,850 75 0.48 783 -12.81 0.8345
2015-07-24 2015-06-30 13F Merck COM 58933Y105 15,775 -60,321 -79.27 898 -79.47 0.8833
2015-05-07 2015-03-31 13F Merck COM 58933Y105 76,096 -750 -0.98 4,374 0.23 1.2818
2015-01-20 2014-12-31 13F Merck COM 58933Y105 76,846 -183,020 -70.43 4,364 -71.67 1.2454
2014-10-14 2014-09-30 13F Merck COM 58933Y105 259,866 -23,750 -8.37 15,405 -6.11 4.5648
2014-07-25 2014-06-30 13F Merck COM 58933Y105 283,616 -8,450 -2.89 16,407 -1.05 4.8433
2014-04-25 2014-03-31 13F Merck COM 58933Y105 292,066 -1,600 -0.54 16,581 12.81 5.2185
2014-01-16 2013-12-31 13F Merck COM 58933Y105 293,666 -50 -0.02 14,698 5.11 4.8114
2013-10-17 2013-09-30 13F Merck COM 58933Y105 293,716 88,395 43.05 13,984 46.63 5.0627
2013-07-29 2013-06-30 13F Merck COM 58933Y105 205,321 205,321 9,537 3.9255
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.