Merck & Co., Inc.
BG ˙ BUL ˙ US58933Y1055
SecurityBG:6MK / Merck & Co., Inc.
InstitutionCharter Trust Co
Latest Disclosed Ownership173,725 shares
Latest Disclosed Value $ 20,897,380
Charter Trust Co reports 0.98% increase in ownership of 6MK / Merck & Co., Inc.

On April 17, 2026 - Charter Trust Co filed a 13F-HR form disclosing ownership of 173,725 shares of Merck & Co., Inc. (BG:6MK) valued at $20,897,380 USD as of March 31, 2026. The entity filed a previous 13F-HR on January 22, 2026 disclosing 172,032 shares of Merck & Co., Inc.. This represents a change in shares of 0.98% 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)
2026-04-17 2026-03-31 13F MERCK COM 58933Y105 173,725 1,693 0.98 20,897 15.40 1.2226
2026-01-22 2025-12-31 13F MERCK COM 58933Y105 172,032 11,622 7.25 18,108 34.50 1.0465
2025-10-15 2025-09-30 13F MERCK COM 58933Y105 160,410 14,147 9.67 13,463 16.28 0.8081
2025-07-23 2025-06-30 13F MERCK COM 58933Y105 146,263 -1,508 -1.02 11,578 -12.70 0.7409
2025-04-16 2025-03-31 13F MERCK COM 58933Y105 147,771 -1,082 -0.73 13,264 -10.43 0.8786
2025-01-13 2024-12-31 13F Merck COM 58933Y105 148,853 -642 -0.43 14,808 -12.78 0.9699
2024-10-16 2024-09-30 13F Merck COM 58933Y105 149,495 -320 -0.21 16,977 -8.47 1.0827
2024-07-17 2024-06-30 13F Merck COM 58933Y105 149,815 274 0.18 18,547 -6.00 1.2276
2024-04-24 2024-03-31 13F Merck COM 58933Y105 149,541 12,138 8.83 19,732 31.72 1.3178
2024-01-17 2023-12-31 13F Merck COM 58933Y105 137,403 412 0.30 14,980 6.21 1.1167
2023-11-28 2023-09-30 13F Merck COM 58933Y105 136,991 -1,582 -1.14 14,103 -11.80 1.1231
2023-08-09 2023-06-30 13F Merck COM 58933Y105 138,573 -1,070 -0.77 15,990 7.63 1.2260
2023-04-24 2023-03-31 13F Merck COM 58933Y105 139,643 -274 -0.20 14,857 -4.30 1.1828
2023-06-09 2022-12-31 13F/A-1 Merck COM 58933Y105 139,917 197 0.14 15,524 29.00 1.2397
2023-01-19 2022-12-31 13F Merck COM 58933Y105 139,917 197 16 0.0012
2022-10-24 2022-09-30 13F Merck COM 58933Y105 139,720 -2,675 -1.88 12,033 -7.31 1.0368
2022-08-12 2022-06-30 13F Merck COM 58933Y105 142,395 14,646 11.46 12,982 23.85 1.0388
2022-04-14 2022-03-31 13F Merck COM 58933Y105 127,749 -730 -0.57 10,482 6.45 0.9401
2022-01-28 2021-12-31 13F Merck COM 58933Y105 128,479 1,675 1.32 9,847 3.39 0.8360
2021-11-15 2021-09-30 13F Merck COM 58933Y105 126,804 -912 -0.71 9,524 -4.11 0.8908
2021-08-11 2021-06-30 13F Merck COM 58933Y105 127,716 -1,230 -0.95 9,932 -0.08 0.9232
2021-05-06 2021-03-31 13F Merck COM 58933Y105 128,946 -5,019 -3.75 9,940 -9.29 0.9671
2021-02-09 2020-12-31 13F Merck COM 58933Y105 133,965 -770 -0.57 10,958 -1.95 1.0980
2020-11-02 2020-09-30 13F Merck COM 58933Y105 134,735 -810 -0.60 11,176 6.62 1.2350
2020-08-04 2020-06-30 13F Merck COM 58933Y105 135,545 -4,334 -3.10 10,482 -2.60 1.2118
2020-05-14 2020-03-31 13F Merck COM 58933Y105 139,879 -6,704 -4.57 10,762 -19.28 1.4513
2020-02-11 2019-12-31 13F MERCK COMMON STOCK 58933Y105 146,583 -2,201 -1.48 13,332 6.44 1.4587
2019-11-07 2019-09-30 13F MERCK COMMON STOCK 58933Y105 148,784 679 0.46 12,525 0.85 1.4548
2019-08-01 2019-06-30 13F MERCK COMMON STOCK 58933Y105 148,105 2,798 1.93 12,419 2.76 1.4444
2019-05-10 2019-03-31 13F MERCK COMMON STOCK 58933Y105 145,307 -339 -0.23 12,085 8.59 1.4489
2019-02-13 2018-12-31 13F MERCK COMMON STOCK 58933Y105 145,646 368 0.25 11,129 7.99 1.4801
2018-11-14 2018-09-30 13F MERCK COMMON STOCK 58933Y105 145,278 -481 -0.33 10,306 16.48 1.1696
2018-08-10 2018-06-30 13F MERCK COMMON STOCK 58933Y105 145,759 3,094 2.17 8,848 13.86 1.0666
2018-04-06 2018-03-31 13F MERCK COMMON STOCK 58933Y105 142,665 -3,290 -2.25 7,771 -5.38 0.9521
2018-01-17 2017-12-31 13F MERCK COMMON STOCK 58933Y105 145,955 -4,715 -3.13 8,213 -14.86 0.9561
2017-10-11 2017-09-30 13F MERCK COMMON STOCK 58933Y105 150,670 -4,401 -2.84 9,647 -2.93 1.1670
2017-07-10 2017-06-30 13F MERCK COMMON STOCK 58933Y105 155,071 -3,378 -2.13 9,938 -1.29 1.1924
2017-04-07 2017-03-31 13F MERCK COMMON STOCK 58933Y105 158,449 -5,998 -3.65 10,068 4.00 1.1766
2017-01-19 2016-12-31 13F MERCK COMMON STOCK 58933Y105 164,447 1,840 1.13 9,681 -4.60 1.0683
2016-10-14 2016-09-30 13F MERCK COMMON STOCK 58933Y105 162,607 1,227 0.76 10,148 9.15 1.1489
2016-07-19 2016-06-30 13F MERCK COMMON STOCK 58933Y105 161,380 1,305 0.82 9,297 9.76 1.0810
2016-04-08 2016-03-31 13F MERCK COMMON STOCK 58933Y105 160,075 4,740 3.05 8,470 3.23 1.0330
2016-01-11 2015-12-31 13F MERCK COMMON STOCK 58933Y105 155,335 116 0.07 8,205 7.03 1.0309
2015-10-16 2015-09-30 13F MERCK COMMON STOCK 58933Y105 155,219 8,259 5.62 7,666 -8.38 1.0168
2015-07-20 2015-06-30 13F MERCK COMMON STOCK 58933Y105 146,960 1,922 1.33 8,367 0.36 1.0170
2015-04-07 2015-03-31 13F MERCK COMMON STOCK 58933Y105 145,038 1,646 1.15 8,337 2.38 1.0107
2015-01-14 2014-12-31 13F MERCK COMMON STOCK 58933Y105 143,392 75 0.05 8,143 -4.15 1.0169
2014-10-21 2014-09-30 13F MERCK COMMON STOCK 58933Y105 143,317 -150 -0.10 8,496 2.37 1.0902
2014-07-09 2014-06-30 13F MERCK COMMON STOCK 58933Y105 143,467 700 0.49 8,299 2.41 1.0398
2014-04-28 2014-03-31 13F MERCK COMMON STOCK 58933Y105 142,767 961 0.68 8,104 14.19 1.0413
2014-01-15 2013-12-31 13F MERCK COMMON STOCK 58933Y105 141,806 -97 -0.07 7,097 5.05 0.9218
2013-10-23 2013-09-30 13F MERCK COMMON STOCK 58933Y105 141,903 -168 -0.12 6,756 2.38 0.9471
2013-07-25 2013-06-30 13F MERCK COMMON STOCK 58933Y105 142,071 4,653 3.39 6,599 8.64 0.9550
2013-05-28 2013-03-31 13F MERCK COMMON STOCK 58933Y105 137,418 137,418 6,074 0.9275
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.