Merck & Co., Inc.
MX ˙ BMV ˙ US58933Y1055
SecurityMX:MRK / Merck & Co., Inc.
InstitutionFirst Financial Corp /in/
Latest Disclosed Ownership11,730 shares
Latest Disclosed Value $ 1,411,002
First Financial Corp /in/ reports 0.95% decrease in ownership of MRK / Merck & Co., Inc.

On April 7, 2026 - First Financial Corp /in/ filed a 13F-HR form disclosing ownership of 11,730 shares of Merck & Co., Inc. (MX:MRK) valued at $1,411,002 USD as of March 31, 2026. The entity filed a previous 13F-HR on January 13, 2026 disclosing 11,842 shares of Merck & Co., Inc.. This represents a change in shares of -0.95% 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 & Co. Com 58933Y105 11,730 -112 -0.95 1,411 13.24 0.3160
2026-01-13 2025-12-31 13F Merck & Co. Com 58933Y105 11,842 -100 -0.84 1,246 24.35 0.2688
2025-10-09 2025-09-30 13F Merck & Co. Com 58933Y105 11,942 -200 -1.65 1,002 4.27 0.3927
2025-07-09 2025-06-30 13F Merck & Co. Com 58933Y105 12,142 -798 -6.17 961 -17.23 0.4291
2025-04-10 2025-03-31 13F Merck And Com 58933Y105 12,940 -200 -1.52 1,161 -11.17 0.5615
2025-01-13 2024-12-31 13F Merck And Com 58933Y105 13,140 790 6.40 1,307 -6.78 0.6089
2024-10-24 2024-09-30 13F Merck And Com 58933Y105 12,350 -85 -0.68 1,402 -8.90 0.6693
2024-07-11 2024-06-30 13F MERCK COMMON STOCK 58933Y105 12,435 -214 -1.69 1,539 -7.79 0.7842
2024-04-12 2024-03-31 13F MERCK COMMON STOCK 58933Y105 12,649 -2,561 -16.84 1,669 0.66 0.8472
2024-01-16 2023-12-31 13F MERCK COMMON STOCK 58933Y105 15,210 -211 -1.37 1,658 4.47 0.8437
2023-10-11 2023-09-30 13F MERCK COMMON STOCK 58933Y105 15,421 5,525 55.83 1,588 39.09 0.9307
2023-07-14 2023-06-30 13F MERCK COMMON STOCK 58933Y105 9,896 -12 -0.12 1,142 8.25 0.7320
2023-04-17 2023-03-31 13F MERCK COMMON STOCK 58933Y105 9,908 -487 -4.68 1,054 -8.59 0.6556
2023-01-17 2022-12-31 13F MERCK COMMON STOCK 58933Y105 10,395 0 0.00 1,153 28.83 0.7077
2022-10-20 2022-09-30 13F MERCK COMMON STOCK 58933Y105 10,395 0 0.00 895 -5.59 0.6013
2022-07-15 2022-06-30 13F MERCK COMMON STOCK 58933Y105 10,395 -7,160 -40.79 948 -34.12 0.6238
2022-04-14 2022-03-31 13F MERCK COMMON STOCK 58933Y105 17,555 7,260 70.52 1,439 82.38 0.7275
2022-01-14 2021-12-31 13F MERCK COMMON STOCK 58933Y105 10,295 0 0.00 789 2.07 0.4819
2021-10-18 2021-09-30 13F MERCK COMMON STOCK 58933Y105 10,295 -253 -2.40 773 -5.73 0.5135
2021-07-15 2021-06-30 13F MERCK COMMON STOCK 58933Y105 10,548 0 0.00 820 0.86 0.5453
2021-04-15 2021-03-31 13F MERCK COMMON STOCK 58933Y105 10,548 -138 -1.29 813 -6.98 0.5644
2021-01-15 2020-12-31 13F MERCK COMMON STOCK 58933Y105 10,686 -225 -2.06 874 -3.43 0.6444
2020-10-13 2020-09-30 13F MERCK COMMON STOCK 58933Y105 10,911 514 4.94 905 12.56 0.7673
2020-07-15 2020-06-30 13F MERCK COMMON STOCK 58933Y105 10,397 -76 -0.73 804 -0.25 0.6855
2020-04-15 2020-03-31 13F MERCK COMMON STOCK 58933Y105 10,473 90 0.87 806 -14.71 0.7404
2020-01-15 2019-12-31 13F MERCK COMMON STOCK 58933Y105 10,383 -150 -1.42 945 6.54 0.6874
2019-10-15 2019-09-30 13F MERCK COMMON STOCK 58933Y105 10,533 430 4.26 887 4.72 0.6914
2019-07-15 2019-06-30 13F MERCK COMMON STOCK 58933Y105 10,103 -100 -0.98 847 -0.12 0.6844
2019-04-12 2019-03-31 13F MERCK COMMON STOCK 58933Y105 10,203 150 1.49 848 10.42 0.6333
2019-01-15 2018-12-31 13F MERCK COMMON STOCK 58933Y105 10,053 -435 -4.15 768 3.23 0.6186
2018-10-16 2018-09-30 13F MERCK COMMON STOCK 58933Y105 10,488 -430 -3.94 744 12.22 0.4873
2018-07-12 2018-06-30 13F MERCK COMMON STOCK 58933Y105 10,918 -85 -0.77 663 10.50 0.4643
2018-04-17 2018-03-31 13F MERCK COMMON STOCK 58933Y105 11,003 -701 -5.99 600 -8.95 0.4309
2018-01-16 2017-12-31 13F MERCK COMMON STOCK 58933Y105 11,704 -659 -5.33 659 -16.79 0.4255
2017-10-13 2017-09-30 13F MERCK COMMON STOCK 58933Y105 12,363 -18 -0.15 792 -0.13 0.5176
2017-07-13 2017-06-30 13F MERCK COMMON STOCK 58933Y105 12,381 -200 -1.59 793 -0.75 0.5036
2017-04-18 2017-03-31 13F MERCK COMMON STOCK 58933Y105 12,581 -147 -1.15 799 6.68 0.5073
2017-01-10 2016-12-31 13F MERCK COMMON STOCK 58933Y105 12,728 -1,246 -8.92 749 -14.11 0.4455
2016-10-17 2016-09-30 13F MERCK COMMON STOCK 58933Y105 13,974 -1,076 -7.15 872 0.58 0.5169
2016-07-12 2016-06-30 13F MERCK COMMON STOCK 58933Y105 15,050 -7,590 -33.52 867 -27.57 0.5028
2016-04-18 2016-03-31 13F MERCK COMMON STOCK 58933Y105 22,640 630 2.86 1,197 3.01 0.6241
2016-01-14 2015-12-31 13F MERCK COMMON STOCK 58933Y105 22,010 0 0.00 1,162 6.90 0.6148
2015-10-09 2015-09-30 13F MERCK COMMON STOCK 58933Y105 22,010 -755 -3.32 1,087 -16.13 0.6110
2015-07-14 2015-06-30 13F MERCK COMMON STOCK 58933Y105 22,765 1,000 4.59 1,296 3.60 0.6567
2015-04-14 2015-03-31 13F MERCK COMMON STOCK 58933Y105 21,765 300 1.40 1,251 2.63 0.6306
2015-01-08 2014-12-31 13F MERCK COMMON STOCK 58933Y105 21,465 -398 -1.82 1,219 -5.94 0.6081
2014-10-21 2014-09-30 13F MERCK COMMON STOCK 58933Y105 21,863 -2,100 -8.76 1,296 -6.49 0.6432
2014-07-18 2014-06-30 13F/A-1 MERCK COMMON STOCK 58933Y105 23,963 -55 -0.23 1,386 1.69 0.6670
2014-07-17 2014-06-30 13F MERCK COMMON STOCK 58933Y105 24,118 1,207
2014-04-21 2014-03-31 13F MERCK COMMON STOCK 58933Y105 24,018 -100 -0.41 1,363 12.92 0.6548
2014-01-23 2013-12-31 13F MERCK COMMON STOCK 58933Y105 24,118 60 0.25 1,207 5.41 0.5644
2013-10-28 2013-09-30 13F MERCK COMMON STOCK 58933Y105 24,058 1,063 4.62 1,145 7.21 0.5637
2013-07-24 2013-06-30 13F MERCK COMMON STOCK 58933Y105 22,995 22,995 1,068 0.5295
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.