Merck & Co., Inc.
MX ˙ BMV ˙ US58933Y1055
SecurityMX:MRK / Merck & Co., Inc.
InstitutionColumbia Asset Management
Latest Disclosed Ownership111,663 shares
Latest Disclosed Value $ 13,431,896
Columbia Asset Management reports 0.12% increase in ownership of MRK / Merck & Co., Inc.

On April 20, 2026 - Columbia Asset Management filed a 13F-HR form disclosing ownership of 111,663 shares of Merck & Co., Inc. (MX:MRK) valued at $13,431,896 USD as of March 31, 2026. The entity filed a previous 13F-HR on January 28, 2026 disclosing 111,534 shares of Merck & Co., Inc.. This represents a change in shares of 0.12% 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)
2026-04-20 2026-03-31 13F MERCK COM 58933Y105 111,663 129 0.12 13,432 14.40 2.5580
2026-01-28 2025-12-31 13F MERCK COM 58933Y105 111,534 -1,605 -1.42 11,740 23.64 2.0866
2025-11-04 2025-09-30 13F MERCK COM 58933Y105 113,139 -2,413 -2.09 9,496 3.80 1.7769
2025-07-18 2025-06-30 13F MERCK COM 58933Y105 115,552 -7,096 -5.79 9,147 -16.91 1.7978
2025-04-10 2025-03-31 13F MERCK COM 58933Y105 122,648 -7,731 -5.93 11,009 -15.13 2.1535
2025-02-12 2024-12-31 13F MERCK COM 58933Y105 130,379 -4,231 -3.14 12,970 86,366.67 2.3705
2024-11-12 2024-09-30 13F Merck COM 58933Y105 134,610 -4,782 -3.43 15 -11.76 2.6642
2024-08-05 2024-06-30 13F Merck COM 58933Y105 139,392 -628 -0.45 17 13.33 3.2171
2024-05-08 2024-03-31 13F Merck COM 58933Y105 140,020 0 0.00 15 0.00 3.0963
2024-02-09 2023-12-31 13F Merck COM 58933Y105 140,020 -1,281 -0.91 15 7.14 3.0951
2023-11-13 2023-09-30 13F Merck COM 58933Y105 141,301 -1,587 -1.11 15 -12.50 3.2118
2023-08-14 2023-06-30 13F Merck COM 58933Y105 142,888 -5,335 -3.60 16 6.67 3.5085
2023-05-15 2023-03-31 13F Merck COM 58933Y105 148,223 -1,092 -0.73 16 -6.25 3.5470
2023-02-10 2022-12-31 13F Merck COM 58933Y105 149,315 87 0.06 17 -99.88 4.0225
2022-11-03 2022-09-30 13F Merck COM 58933Y105 149,228 2,974 2.03 12,851 -3.62 3.3775
2022-08-26 2022-06-30 13F Merck COM 58933Y105 146,254 -1,212 -0.82 13,334 17.98 3.3804
2022-02-14 2021-12-31 13F Merck COM 58933Y105 147,466 858 0.59 11,302 2.63 2.2915
2021-11-15 2021-09-30 13F Merck COM 58933Y105 146,608 1,881 1.30 11,012 -2.16 2.4020
2021-08-02 2021-06-30 13F Merck COM 58933Y105 144,727 -13,563 -8.57 11,255 -7.77 2.4976
2021-05-28 2021-03-31 13F Merck COM 58933Y105 158,290 1,432 0.91 12,203 -4.89 2.2138
2021-02-11 2020-12-31 13F Merck COM 58933Y105 156,858 784 0.50 12,831 -0.89 2.5852
2020-11-16 2020-09-30 13F Merck COM 58933Y105 156,074 1,961 1.27 12,946 8.63 2.9657
2020-08-14 2020-06-30 13F Merck COM 58933Y105 154,113 -675 -0.44 11,918 0.08 2.8527
2020-05-14 2020-03-31 13F Merck COM 58933Y105 154,788 1,684 1.10 11,909 -91.45 2.9395
2020-02-14 2019-12-31 13F Merck COM 58933Y105 153,104 -103 -0.07 139,248 979.69 3.3553
2019-11-12 2019-09-30 13F Merck COM 58933Y105 153,207 980 0.64 12,897 1.04 3.3566
2019-08-15 2019-06-30 13F Merck COM 58933Y105 152,227 -930 -0.61 12,764 0.20 3.3598
2019-05-20 2019-03-31 13F Merck COM 58933Y105 153,157 -41 -0.03 12,738 8.82 3.3994
2019-02-12 2018-12-31 13F Merck COM 58933Y105 153,198 -3,065 -1.96 11,706 5.60 3.5578
2018-11-06 2018-09-30 13F Merck COM 58933Y105 156,263 657 0.42 11,085 17.36 2.8933
2018-08-14 2018-06-30 13F Merck COM 58933Y105 155,606 -612 -0.39 9,445 11.00 2.7478
2018-05-07 2018-03-31 13F Merck COM 58933Y105 156,218 1,538 0.99 8,509 -2.24 2.4951
2018-02-05 2017-12-31 13F Merck COM 58933Y105 154,680 -309 -0.20 8,704 -12.29 2.4979
2017-11-07 2017-09-30 13F Merck COM 58933Y105 154,989 -754 -0.48 9,924 -0.57 3.0494
2017-08-10 2017-06-30 13F Merck COM 58933Y105 155,743 -126 -0.08 9,981 0.79 3.2198
2017-05-11 2017-03-31 13F Merck COM 58933Y105 155,869 -646 -0.41 9,903 7.48 3.3150
2017-02-14 2016-12-31 13F/A-1 Merck COM 58933Y105 156,515 126 0.08 9,214 -5.59 3.1104
2017-01-25 2016-12-31 13F Merck COM 58933Y105 156,515 9,214
2016-11-01 2016-09-30 13F Merck COM 58933Y105 156,389 -1,103 -0.70 9,760 7.57 3.4221
2016-08-08 2016-06-30 13F Merck COM 58933Y105 157,492 2,438 1.57 9,073 10.61 3.2324
2016-05-17 2016-03-31 13F/A-1 Merck COM 58933Y105 155,054 2,647 1.74 8,203 1.90 3.0142
2016-05-17 2016-03-31 13F Merck COM 58933Y105 152,407 8,050
2016-02-08 2015-12-31 13F Merck COM 58933Y105 152,407 1,084 0.72 8,050 7.71 3.2311
2015-11-16 2015-09-30 13F Merck COM 58933Y105 151,323 3,280 2.22 7,474 -11.32 3.0399
2015-08-11 2015-06-30 13F Merck COM 58933Y105 148,043 -200 -0.13 8,428 -1.09 3.2084
2015-05-11 2015-03-31 13F Merck COM 58933Y105 148,243 470 0.32 8,521 1.54 3.2061
2015-02-24 2014-12-31 13F Merck COM 58933Y105 147,773 -4,110 -2.71 8,392 -6.80 3.2310
2014-11-17 2014-09-30 13F MERCK COM 58933Y105 151,883 -480 -0.32 9,004 2.16 3.6368
2014-08-25 2014-06-30 13F MERCK COM 58933Y105 152,363 -125 -0.08 8,814 1.81 3.5734
2014-05-23 2014-03-31 13F MERCK COM 58933Y105 152,488 250 0.16 8,657 13.61 3.7652
2014-02-11 2013-12-31 13F MERCK & CO INC COM 58933Y105 152,238 152,238 7,620 3.3704
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.