Merck & Co., Inc.
BG ˙ BUL ˙ US58933Y1055
SecurityBG:6MK / Merck & Co., Inc.
InstitutionTrust Co
Latest Disclosed Ownership10,815 shares
Latest Disclosed Value $ 1,300,936
Trust Co reports 59.66% decrease in ownership of 6MK / Merck & Co., Inc.

On April 13, 2026 - Trust Co filed a 13F-HR form disclosing ownership of 10,815 shares of Merck & Co., Inc. (BG:6MK) valued at $1,300,936 USD as of March 31, 2026. The entity filed a previous 13F-HR on January 15, 2026 disclosing 26,812 shares of Merck & Co., Inc.. This represents a change in shares of -59.66% 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)
2026-04-13 2026-03-31 13F MERCK & CO INC COM Stock 58933Y105 10,815 -15,997 -59.66 1,301 -53.93 0.1219
2026-01-15 2025-12-31 13F MERCK & CO INC COM Stock 58933Y105 26,812 -101 -0.38 2,822 24.98 0.2647
2025-10-06 2025-09-30 13F Merck COM 58933Y105 26,913 1,151 4.47 2,259 10.74 0.2310
2025-07-07 2025-06-30 13F Merck COM 58933Y105 25,762 10,019 63.64 2,039 44.30 0.2301
2025-04-08 2025-03-31 13F Merck COM 58933Y105 15,743 4,518 40.25 1,413 26.61 0.1678
2025-01-14 2024-12-31 13F Merck COM 58933Y105 11,225 8,955 394.49 1,117 334.24 0.1280
2024-10-03 2024-09-30 13F Merck COM 58933Y105 2,270 -48 -2.07 258 -10.14 0.0310
2024-07-15 2024-06-30 13F Merck COM 58933Y105 2,318 0 0.00 287 -6.23 0.0371
2024-04-11 2024-03-31 13F Merck COM 58933Y105 2,318 -333 -12.56 306 5.54 0.0402
2024-01-10 2023-12-31 13F Merck COM 58933Y105 2,651 -1,026 -27.90 289 -23.54 0.0372
2023-12-04 2023-09-30 13F Merck COM 58933Y105 3,677 -3,313 -47.40 379 -53.10 0.0610
2023-07-10 2023-06-30 13F Merck COM 58933Y105 6,990 -3,145 -31.03 807 -25.23 0.1204
2023-04-07 2023-03-31 13F Merck COM 58933Y105 10,135 -2,088 -17.08 1,078 107,700.00 0.1635
2023-01-09 2022-12-31 13F Merck COM 58933Y105 12,223 -851 -6.51 1 -99.91 0.2197
2022-10-11 2022-09-30 13F Merck COM 58933Y105 13,074 4,095 45.61 1,126 37.48 0.2463
2022-07-06 2022-06-30 13F Merck COM 58933Y105 8,979 -11,053 -55.18 819 -50.18 0.1766
2022-04-08 2022-03-31 13F Merck COM 58933Y105 20,032 236 1.19 1,644 8.37 0.3208
2022-01-14 2021-12-31 13F Merck COM 58933Y105 19,796 -533 -2.62 1,517 -0.65 0.3539
2021-10-20 2021-09-30 13F Merck COM 58933Y105 20,329 558 2.82 1,527 -0.72 0.3914
2021-07-14 2021-06-30 13F Merck COM 58933Y105 19,771 12 0.06 1,538 0.98 1.0788
2021-04-08 2021-03-31 13F Merck COM 58933Y105 19,759 7,307 58.68 1,523 49.46 1.0979
2021-01-12 2020-12-31 13F Merck COM 58933Y105 12,452 871 7.52 1,019 6.04 0.8052
2020-10-06 2020-09-30 13F Merck COM 58933Y105 11,581 1,038 9.85 961 17.91 0.8082
2020-07-17 2020-06-30 13F Merck COM 58933Y105 10,543 8,068 325.98 815 328.95 0.7748
2020-04-07 2020-03-31 13F Merck COM 58933Y105 2,475 0 0.00 190 -15.56 0.2095
2020-01-07 2019-12-31 13F Merck COM 58933Y105 2,475 -3,935 -61.39 225 -58.33 0.1978
2019-10-09 2019-09-30 13F Merck COM 58933Y105 6,410 144 2.30 540 2.86 0.5099
2019-07-08 2019-06-30 13F Merck COM 58933Y105 6,266 0 0.00 525 0.77 0.4833
2019-04-08 2019-03-31 13F Merck COM 58933Y105 6,266 0 0.00 521 8.77 0.3038
2019-01-22 2018-12-31 13F Merck COM 58933Y105 6,266 1,850 41.89 479 53.04 0.2665
2018-10-09 2018-09-30 13F Merck COM 58933Y105 4,416 -763 -14.73 313 -0.32 0.1413
2018-07-10 2018-06-30 13F Merck COM 58933Y105 5,179 0 0.00 314 11.35 0.1436
2018-04-09 2018-03-31 13F Merck COM 58933Y105 5,179 0 0.00 282 -3.09 0.1041
2018-03-09 2017-12-31 13F/A-1 Merck COM 58933Y105 5,179 -117,401 -95.78 291 -96.29 0.1202
2018-01-11 2017-12-31 13F Merck COM 58933Y105 5,179 -117,401 291
2017-10-12 2017-09-30 13F Merck COM 58933Y105 122,580 2,009 1.67 7,849 1.58 4.3189
2017-07-07 2017-06-30 13F Merck COM 58933Y105 120,571 17,010 16.43 7,727 17.43 3.5726
2017-04-06 2017-03-31 13F Merck COM 58933Y105 103,561 10,247 10.98 6,580 19.79 2.9902
2017-01-12 2016-12-31 13F Merck COM 58933Y105 93,314 10,695 12.94 5,493 6.54 2.7919
2016-10-19 2016-09-30 13F Merck MERCK & CO INC COM 58933Y105 82,619 77,481 1,508.00 5,156 1,641.89 2.2613
2016-07-08 2016-06-30 13F Merck COM 58933Y105 5,138 0 0.00 296 8.82 0.1131
2016-04-08 2016-03-31 13F Merck COM 58933Y105 5,138 -150 -2.84 272 -2.51 0.1244
2016-01-26 2015-12-31 13F Merck COM 58933Y105 5,288 -580 -9.88 279 -3.79 0.1293
2015-10-13 2015-09-30 13F Merck COM 58933Y105 5,868 205 3.62 290 -9.94 0.1646
2015-07-10 2015-06-30 13F Merck COM 58933Y105 5,663 569 11.17 322 9.90 0.2012
2015-05-07 2015-03-31 13F Merck COM 58933Y105 5,094 5,094 293 0.1851
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.