Merck & Co., Inc.
DE ˙ XTRA ˙ US58933Y1055
102,78 € ↑2,84 (2,84%)
2026-06-04
DEL PRIS
SecurityDE:6MK / Merck & Co., Inc.
InstitutionArvest Bank Trust Division
Latest Disclosed Ownership14,982 shares
Latest Disclosed Value $ 1,802,184
Arvest Bank Trust Division reports 1.55% decrease in ownership of 6MK / Merck & Co., Inc.

On May 13, 2026 - Arvest Bank Trust Division filed a 13F-HR form disclosing ownership of 14,982 shares of Merck & Co., Inc. (DE:6MK) valued at $1,561,124 USD as of March 31, 2026. The entity filed a previous 13F-HR on February 9, 2026 disclosing 15,218 shares of Merck & Co., Inc.. This represents a change in shares of -1.55% during the quarter. The current value of the position is $1,539,850 USD.

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)
2026-05-13 2026-03-31 13F MERCK COM 58933Y105 14,982 -236 -1.55 1,802 12.55 0.0979
2026-02-09 2025-12-31 13F MERCK COM 58933Y105 15,218 858 5.97 1,602 32.86 0.0867
2025-11-07 2025-09-30 13F MERCK COM 58933Y105 14,360 226 1.60 1,205 7.78 0.0669
2025-08-08 2025-06-30 13F MERCK COM 58933Y105 14,134 -10,755 -43.21 1,119 -49.96 0.0653
2025-05-14 2025-03-31 13F MERCK COM 58933Y105 24,889 -265 -1.05 2,234 -10.71 0.1413
2025-02-13 2024-12-31 13F MERCK COM 58933Y105 25,154 -918 -3.52 2,502 -15.47 0.1508
2024-11-25 2024-09-30 13F MERCK COM 58933Y105 26,072 8,471 48.13 2,961 123.90 0.1706
2021-11-12 2021-09-30 13F MERCK COM 58933Y105 17,601 2,666 17.85 1,322 13.87 0.0742
2021-08-19 2021-06-30 13F MERCK COM 58933Y105 14,935 4,128 38.20 1,161 39.38 0.0640
2021-04-13 2021-03-31 13F MERCK & CO. COM 58933Y105 10,807 3,424 46.38 833 37.91 0.0485
2021-02-17 2020-12-31 13F MERCK & CO. COM 58933Y105 7,383 3,545 92.37 604 89.94 0.0375
2020-11-30 2020-09-30 13F MERCK & CO. COM 58933Y105 3,838 779 25.47 318 34.18 0.0228
2020-08-21 2020-06-30 13F MERCK & CO. COM 58933Y105 3,059 -749 -19.67 237 -19.11 0.0175
2020-04-14 2020-03-31 13F MERCK & CO. COM 58933Y105 3,808 3,808 293 0.0271
2019-07-19 2019-06-30 13F MERCK COM 58933Y105 0 -2,529 -100.00 0 -100.00
2019-04-12 2019-03-31 13F MERCK COM 58933Y105 2,529 2,529 211 0.0146
2019-01-18 2018-12-31 13F MERCK COM 58933Y105 0 -2,898 -100.00 0 -100.00
2018-10-30 2018-09-30 13F MERCK COM 58933Y105 2,898 2,898 205 0.0139
2017-04-17 2017-03-31 13F MERCK COM 58933Y105 0 -3,675 -100.00 0 -100.00
2017-01-09 2016-12-31 13F MERCK COM 58933Y105 3,675 -1,956 -34.74 216 -38.46 0.0173
2016-10-07 2016-09-30 13F MERCK COM 58933Y105 5,631 -1,860 -24.83 351 -18.75 0.0292
2016-08-16 2016-06-30 13F MERCK COM 58933Y105 7,491 7,491 0.00 432 0.0372
2016-04-27 2016-03-31 13F MERCK & CO INC COM 58933Y105 0 -4,569 -100.00 0 -100.00
2016-02-08 2015-12-31 13F MERCK & CO INC COM 58933Y105 4,569 4,569 0.00 241 0.0210
2015-10-13 2015-09-30 13F MERCK & CO INC COM 58933Y105 0 0 0 0.0000
2015-07-07 2015-06-30 13F MERCK & CO INC COM 58933Y105 0 -3,532 -100.00 0 -100.00
2015-04-21 2015-03-31 13F/A-2 MERCK & CO INC COM 58933Y105 3,532 3,532 0.00 203 0.0174
2015-04-21 2015-03-31 13F MERCK & CO INC COM 58933Y105 3,532 213
2015-02-02 2014-12-31 13F MERCK & CO INC COM 58933Y105 0 -3,532 -100.00 0 -100.00
2014-11-19 2014-09-30 13F MERCK & CO INC COM 58933Y105 3,532 3,532 209 0.0193
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.