Merck & Co., Inc.
BG ˙ BUL ˙ US58933Y1055
SecurityBG:6MK / Merck & Co., Inc.
InstitutionSpinnaker Trust
Latest Disclosed Ownership44,543 shares
Latest Disclosed Value $ 5,358,077
Spinnaker Trust reports 0.65% decrease in ownership of 6MK / Merck & Co., Inc.

On April 23, 2026 - Spinnaker Trust filed a 13F-HR form disclosing ownership of 44,543 shares of Merck & Co., Inc. (BG:6MK) valued at $5,358,077 USD as of March 31, 2026. The entity filed a previous 13F-HR on February 10, 2026 disclosing 44,835 shares of Merck & Co., Inc.. This represents a change in shares of -0.65% 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)
2026-04-23 2026-03-31 13F Merck & Co Inc New Com Equities 58933Y105 44,543 -292 -0.65 5,358 13.54 0.2965
2026-02-10 2025-12-31 13F Merck & Co Inc New Com Equities 58933Y105 44,835 1,390 3.20 4,719 29.43 0.2526
2025-11-05 2025-09-30 13F Merck & Co Inc New Com Equities 58933Y105 43,445 -20 -0.05 3,646 5.99 0.2023
2025-08-04 2025-06-30 13F Merck & Co Inc New Com Equities 58933Y105 43,465 810 1.90 3,441 -10.14 0.2069
2025-04-25 2025-03-31 13F Merck & Co Inc New Com Equities 58933Y105 42,655 723 1.72 3,829 -8.22 0.2499
2025-01-30 2024-12-31 13F Merck & Co Inc New Com Equities 58933Y105 41,932 -147 -0.35 4,171 -12.70 0.2631
2024-10-31 2024-09-30 13F Merck & Co Inc New Com Equities 58933Y105 42,079 0 0.00 4,778 -8.27 0.2945
2024-07-31 2024-06-30 13F Merck & Co Inc New Com Equities 58933Y105 42,079 1,475 3.63 5,209 -2.76 0.3336
2024-05-06 2024-03-31 13F Merck & Co Inc New Com Equities 58933Y105 40,604 -983 -2.36 5,358 18.18 0.3459
2024-02-02 2023-12-31 13F Merck & Co Inc New Com Equities 58933Y105 41,587 0 0.00 4,534 5.89 0.3084
2023-11-08 2023-09-30 13F Merck & Co Inc New Com Equities 58933Y105 41,587 323 0.78 4,281 -10.08 0.3223
2023-08-01 2023-06-30 13F Merck & Co Inc New Com Equities 58933Y105 41,264 -590 -1.41 4,761 6.94 0.3459
2023-04-13 2023-03-31 13F Merck & Co Inc New Com Equities 58933Y105 41,854 -185 -0.44 4,453 111,200.00 0.3375
2023-02-02 2022-12-31 13F Merck & Co Inc New Com Equities 58933Y105 42,039 -2,223 -5.02 5 -99.90 0.3634
2022-10-28 2022-09-30 13F Merck & Co Inc New Com Equities 58933Y105 44,262 0 0.00 3,812 -5.53 0.3161
2022-07-25 2022-06-30 13F Merck & Co Inc New Com Equities 58933Y105 44,262 10,883 32.60 4,035 47.32 0.3112
2022-05-02 2022-03-31 13F Merck & Co Inc New Com Equities 58933Y105 33,379 163 0.49 2,739 7.58 0.1847
2022-01-31 2021-12-31 13F Merck & Co Inc New Com Equities 58933Y105 33,216 -166 -0.50 2,546 1.56 0.1631
2021-11-02 2021-09-30 13F Merck & Co Inc New Com Equities 58933Y105 33,382 2,770 9.05 2,507 5.29 0.1744
2021-08-09 2021-06-30 13F Merck & Co Inc New Com Equities 58933Y105 30,612 -1,169 -3.68 2,381 -2.82 0.1658
2021-04-30 2021-03-31 13F Merck & Co Inc New Com Equities 58933Y105 31,781 -29,306 -47.97 2,450 -50.96 0.1839
2021-01-26 2020-12-31 13F Merck & Co Inc New Com Equities 58933Y105 61,087 -808 -1.31 4,996 -2.67 0.3983
2020-10-27 2020-09-30 13F Merck & Co Inc New Com Equities 58933Y105 61,895 2,174 3.64 5,133 11.18 0.4550
2020-07-21 2020-06-30 13F Merck & Co Inc New Com Equities 58933Y105 59,721 -3,319 -5.26 4,617 -4.78 0.4376
2020-05-05 2020-03-31 13F Merck & Co Inc New Com Equities 58933Y105 63,040 -229 -0.36 4,849 -15.71 0.5333
2020-02-05 2019-12-31 13F Merck & Co Inc New Com Equities 58933Y105 63,269 474 0.75 5,753 8.86 0.5254
2019-11-12 2019-09-30 13F Merck & Co Inc New Com Equities 58933Y105 62,795 244 0.39 5,285 0.78 0.5215
2019-07-11 2019-06-30 13F Merck & Co Inc New Com Equities 58933Y105 62,551 797 1.29 5,244 2.12 0.5267
2019-04-29 2019-03-31 13F Merck & Co Inc New Com Equities 58933Y105 61,754 -622 -1.00 5,135 7.76 0.5161
2019-02-04 2018-12-31 13F Merck & Co Inc New Com Equities 58933Y105 62,376 -2,515 -3.88 4,765 3.52 0.5412
2018-10-23 2018-09-30 13F Merck & Co Inc New Com Equities 58933Y105 64,891 2,233 3.56 4,603 21.07 0.4548
2018-08-02 2018-06-30 13F Merck & Co Inc New Com Equities 58933Y105 62,658 3,704 6.28 3,802 18.44 0.4051
2018-05-10 2018-03-31 13F Merck & Co Inc New Com Equities 58933Y105 58,954 5,954 11.23 3,210 7.68 0.3492
2018-02-09 2017-12-31 13F Merck & Co Inc New Com Equities 58933Y105 53,000 6,986 15.18 2,981 1.19 0.3460
2017-10-26 2017-09-30 13F Merck & Co Inc New Com Equities 58933Y105 46,014 13,757 42.65 2,946 42.53 0.3681
2017-07-27 2017-06-30 13F Merck & Co Inc New Com Com 58933Y105 32,257 75 0.23 2,067 1.08 0.2583
2017-05-10 2017-03-31 13F Merck & Co Inc New Com Com 58933Y105 32,182 1,226 3.96 2,045 12.24 0.2657
2017-02-15 2016-12-31 13F Merck & Co Inc New Com Com 58933Y105 30,956 -2,277 -6.85 1,822 3.64 0.2451
2016-11-03 2016-09-30 13F Merck & Co Inc New Com Com 58933Y105 33,233 0 0.00 1,758 -8.20 0.2469
2016-08-01 2016-06-30 13F Merck & Co Inc New Com Com 58933Y105 33,233 0 0.00 1,915 8.93 0.2639
2016-05-05 2016-03-31 13F Merck & Co Inc New Com Com 58933Y105 33,233 338 1.03 1,758 1.15 0.2469
2016-01-29 2015-12-31 13F Merck & Co Inc New Com Com 58933Y105 32,895 -480 -1.44 1,738 5.46 0.2481
2015-11-06 2015-09-30 13F Merck & Co Inc New Com Com 58933Y105 33,375 -47 -0.14 1,648 -13.40 0.2522
2015-08-05 2015-06-30 13F Merck & Co Inc New Com Com 58933Y105 33,422 2,682 8.72 1,903 7.70 0.2839
2015-04-17 2015-03-31 13F Merck & Co Inc New Com Com 58933Y105 30,740 -986 -3.11 1,767 -1.94 0.2551
2015-01-22 2014-12-31 13F Merck & Co Inc New Com Com 58933Y105 31,726 1,950 6.55 1,802 2.10 0.2676
2014-11-03 2014-09-30 13F Merck & Co Inc New Com Com 58933Y105 29,776 -400 -1.33 1,765 1.09 0.2850
2014-07-28 2014-06-30 13F Merck & Co Inc New Com Com 58933Y105 30,176 -4,461 -12.88 1,746 -11.19 0.2861
2014-04-23 2014-03-31 13F Merck & Co Inc New Com Com 58933Y105 34,637 -2,523 -6.79 1,966 5.70 0.3233
2014-01-24 2013-12-31 13F Merck & Co Inc New Com Com 58933Y105 37,160 276 0.75 1,860 5.92 0.3098
2013-10-28 2013-09-30 13F Merck & Co Inc New Com Com 58933Y105 36,884 0 0.00 1,756 2.51 0.3181
2013-08-08 2013-06-30 13F Merck & Co Inc New Com Com 58933Y105 36,884 36,884 1,713 0.3224
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.