머크 앤 컴퍼니(Merck & Co., Inc.)
MX ˙ BMV ˙ US58933Y1055
SecurityMX:MRK / Merck & Co., Inc.
InstitutionBLB&B Advisors, LLC
Latest Disclosed Ownership38,307 shares
Latest Disclosed Value $ 4,607,898
BLB&B Advisors, LLC reports 6.93% decrease in ownership of MRK / Merck & Co., Inc.

On April 28, 2026 - BLB&B Advisors, LLC filed a 13F-HR form disclosing ownership of 38,307 shares of Merck & Co., Inc. (MX:MRK) valued at $4,607,898 USD as of March 31, 2026. The entity filed a previous 13F-HR on January 26, 2026 disclosing 41,161 shares of Merck & Co., Inc.. This represents a change in shares of -6.93% 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)
2026-04-28 2026-03-31 13F MERCK COM 58933Y105 38,307 -2,854 -6.93 4,608 6.35 0.1614
2026-01-26 2025-12-31 13F MERCK COM 58933Y105 41,161 -1,104 -2.61 4,333 22.13 0.1811
2025-10-31 2025-09-30 13F MERCK COM 58933Y105 42,265 -947 -2.19 3,547 3.71 0.1531
2025-08-04 2025-06-30 13F MERCK COM 58933Y105 43,212 -1,301 -2.92 3,421 -14.39 0.1598
2025-04-28 2025-03-31 13F MERCK COM 58933Y105 44,513 -3,392 -7.08 3,996 -16.16 0.2033
2025-01-28 2024-12-31 13F MERCK COM 58933Y105 47,905 -2,957 -5.81 4,766 -17.49 0.2431
2024-10-22 2024-09-30 13F MERCK COM 58933Y105 50,862 324 0.64 5,776 -7.69 0.2951
2024-07-26 2024-06-30 13F MERCK COM 58933Y105 50,538 461 0.92 6,257 -5.31 0.3428
2024-04-26 2024-03-31 13F MERCK COM 58933Y105 50,077 -1,393 -2.71 6,608 17.75 0.3726
2024-01-19 2023-12-31 13F MERCK COM 58933Y105 51,470 -826 -1.58 5,611 4.24 0.3539
2023-10-25 2023-09-30 13F MERCK COM 58933Y105 52,296 -1,343 -2.50 5,384 -13.02 0.3843
2023-07-20 2023-06-30 13F MERCK COM 58933Y105 53,639 -2,130 -3.82 6,189 4.31 0.4327
2023-04-24 2023-03-31 13F MERCK COM 58933Y105 55,769 -1,799 -3.12 5,933 -7.11 0.4421
2023-01-18 2022-12-31 13F MERCK COM 58933Y105 57,568 -3,965 -6.44 6,387 20.53 0.4950
2022-10-14 2022-09-30 13F MERCK COM 58933Y105 61,533 -309 -0.50 5,299 -6.01 0.4407
2022-07-18 2022-06-30 13F MERCK COM 58933Y105 61,842 -3,985 -6.05 5,638 4.39 0.4464
2022-04-20 2022-03-31 13F MERCK COM 58933Y105 65,827 -2,700 -3.94 5,401 2.84 0.3631
2022-01-21 2021-12-31 13F MERCK COM 58933Y105 68,527 -28,304 -29.23 5,252 -27.79 0.3414
2021-10-19 2021-09-30 13F MERCK COM 58933Y105 96,831 23,240 31.58 7,273 27.08 0.4857
2021-07-20 2021-06-30 13F MERCK COM 58933Y105 73,591 -1,602 -2.13 5,723 -1.28 0.4138
2021-04-19 2021-03-31 13F MERCK & CO. COM 58933Y105 75,193 -33,080 -30.55 5,797 -34.55 0.4558
2021-01-19 2020-12-31 13F MERCK & CO. COM 58933Y105 108,273 14,642 15.64 8,857 14.03 0.7174
2020-10-20 2020-09-30 13F MERCK & CO. COM 58933Y105 93,631 -1,809 -1.90 7,767 5.24 0.7806
2020-07-16 2020-06-30 13F MERCK & CO. COM 58933Y105 95,440 -2,127 -2.18 7,380 -1.69 0.7998
2020-04-21 2020-03-31 13F MERCK & CO. COM 58933Y105 97,567 -2,917 -2.90 7,507 -17.86 0.9804
2020-01-21 2019-12-31 13F MERCK COM 58933Y105 100,484 -2,922 -2.83 9,139 4.99 0.9503
2019-10-22 2019-09-30 13F MERCK COM 58933Y105 103,406 -879 -0.84 8,705 -0.45 0.9811
2019-07-29 2019-06-30 13F MERCK COM 58933Y105 104,285 -2,867 -2.68 8,744 -1.89 1.0039
2019-04-19 2019-03-31 13F MERCK COM 58933Y105 107,152 -2,275 -2.08 8,912 6.59 1.0481
2019-01-17 2018-12-31 13F MERCK COM 58933Y105 109,427 -1,972 -1.77 8,361 5.80 1.1479
2018-10-12 2018-09-30 13F MERCK COM 58933Y105 111,399 -6,530 -5.54 7,903 10.41 0.9834
2018-07-11 2018-06-30 13F MERCK COM 58933Y105 117,929 -1,148 -0.96 7,158 10.36 0.9717
2018-04-09 2018-03-31 13F MERCK COM 58933Y105 119,077 1,797 1.53 6,486 -1.71 0.8667
2018-01-16 2017-12-31 13F MERCK COM 58933Y105 117,280 3,333 2.93 6,599 -9.55 0.9431
2017-10-16 2017-09-30 13F MERCK COM 58933Y105 113,947 804 0.71 7,296 0.62 1.1238
2017-08-04 2017-06-30 13F/A-1 MERCK COM 58933Y105 113,143 2,687 2.43 7,251 3.32 1.2030
2017-07-20 2017-06-30 13F MERCK COM 58933Y105 110,456 0 7,018
2017-04-14 2017-03-31 13F MERCK COM 58933Y105 110,456 1,364 1.25 7,018 9.28 1.1920
2017-02-03 2016-12-31 13F MERCK COM 58933Y105 109,092 -605 -0.55 6,422 -6.19 1.1187
2016-10-17 2016-09-30 13F MERCK COM 58933Y105 109,697 76 0.07 6,846 8.49 1.2457
2016-07-19 2016-06-30 13F MERCK COM 58933Y105 109,621 1,786 1.66 6,310 10.59 1.1905
2016-04-18 2016-03-31 13F MERCK & CO INC COM 58933Y105 107,835 276 0.26 5,706 0.44 1.1479
2016-01-15 2015-12-31 13F MERCK & CO INC COM 58933Y105 107,559 414 0.39 5,681 7.35 1.2010
2015-10-20 2015-09-30 13F MERCK & CO INC COM 58933Y105 107,145 2,895 2.78 5,292 -10.83 1.1725
2015-07-16 2015-06-30 13F MERCK & CO INC COM 58933Y105 104,250 2,890 2.85 5,935 1.87 1.2330
2015-04-17 2015-03-31 13F MERCK & CO INC COM 58933Y105 101,360 798 0.79 5,826 2.01 1.2136
2015-01-22 2014-12-31 13F MERCK & CO INC COM 58933Y105 100,562 -8,623 -7.90 5,711 -11.76 1.2075
2014-10-21 2014-09-30 13F MERCK & CO INC COM 58933Y105 109,185 -1,269 -1.15 6,472 1.28 1.3998
2014-07-17 2014-06-30 13F MERCK & CO INC COM 58933Y105 110,454 -663 -0.60 6,390 1.30 1.3653
2014-04-11 2014-03-31 13F MERCK & CO INC COM 58933Y105 111,117 870 0.79 6,308 14.32 1.3896
2014-01-17 2013-12-31 13F MERCK & CO INC COM 58933Y105 110,247 -1,085 -0.97 5,518 4.11 1.3210
2013-10-16 2013-09-30 13F MERCK & CO INC COM 58933Y105 111,332 395 0.36 5,300 2.85 1.3964
2013-07-11 2013-06-30 13F MERCK & CO INC COM 58933Y105 110,937 110,937 5,153 1.4334
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.