Merck & Co., Inc.
DE ˙ XTRA ˙ US58933Y1055
102,78 € ↑2,84 (2,84%)
2026-06-04
AKTIENPREIS
SecurityDE:6MK / Merck & Co., Inc.
InstitutionTower Bridge Advisors
Latest Disclosed Ownership35,251 shares
Latest Disclosed Value $ 4,240,300
Tower Bridge Advisors reports 1.90% decrease in ownership of 6MK / Merck & Co., Inc.

On May 12, 2026 - Tower Bridge Advisors filed a 13F-HR form disclosing ownership of 35,251 shares of Merck & Co., Inc. (DE:6MK) valued at $3,673,154 USD as of March 31, 2026. The entity filed a previous 13F-HR on February 13, 2026 disclosing 35,935 shares of Merck & Co., Inc.. This represents a change in shares of -1.90% during the quarter. The current value of the position is $3,623,098 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)
2026-05-12 2026-03-31 13F Merck Common 58933Y105 35,251 -684 -1.90 4,240 12.11 0.2973
2026-02-13 2025-12-31 13F MERCK COMMON 58933Y105 35,935 -48 -0.13 3,783 25.23 0.3820
2025-11-12 2025-09-30 13F MERCK COMMON 58933Y105 35,983 -3,310 -8.42 3,020 -2.89 0.3016
2025-08-11 2025-06-30 13F MERCK COMMON 58933Y105 39,293 -4,573 -10.42 3,110 -21.01 0.3344
2025-05-08 2025-03-31 13F MERCK COMMON 58933Y105 43,866 -4,200 -8.74 3,937 -17.65 0.4399
2025-02-05 2024-12-31 13F MERCK COMMON 58933Y105 48,066 -434 -0.89 4,782 -13.18 0.5092
2024-11-06 2024-09-30 13F MERCK COMMON 58933Y105 48,500 1,405 2.98 5,508 -5.54 0.5715
2024-07-24 2024-06-30 13F MERCK COMMON 58933Y105 47,095 -1,062 -2.21 5,830 -8.25 0.6480
2024-04-29 2024-03-31 13F MERCK COMMON 58933Y105 48,157 -499 -1.03 6,354 19.80 0.6467
2024-02-14 2023-12-31 13F MERCK COMMON 58933Y105 48,656 -697 -1.41 5,304 4.41 0.4563
2023-11-01 2023-09-30 13F MERCK COMMON 58933Y105 49,353 -1,247 -2.46 5,081 -12.98 0.4703
2023-07-20 2023-06-30 13F MERCK COM 58933Y105 50,600 -14,356 -22.10 5,839 -15.51 0.5352
2023-04-26 2023-03-31 13F MERCK COMMON 58933Y105 64,956 1,500 2.36 6,911 -1.85 0.5659
2023-01-27 2022-12-31 13F MERCK COMMON 58933Y105 63,456 -217 -0.34 7,040 28.40 0.5847
2022-11-14 2022-09-30 13F MERCK COMMON 58933Y105 63,673 -630 -0.98 5,484 -6.47 0.4873
2022-07-21 2022-06-30 13F MERCK COMMON 58933Y105 64,303 518 0.81 5,863 12.02 0.4781
2022-05-05 2022-03-31 13F MERCK COMMON 58933Y105 63,785 444 0.70 5,234 7.81 0.3498
2022-02-09 2021-12-31 13F MERCK COMMON 58933Y105 63,341 -1,279 -1.98 4,854 0.02 0.2981
2021-10-28 2021-09-30 13F MERCK COMMON 58933Y105 64,620 -135 -0.21 4,854 -3.61 0.3238
2021-08-10 2021-06-30 13F MERCK COMMON 58933Y105 64,755 -280 -0.43 5,036 0.44 0.3357
2021-05-12 2021-03-31 13F MERCK COMMON 58933Y105 65,035 -1,293 -1.95 5,014 -7.59 0.3774
2021-02-11 2020-12-31 13F MERCK COMMON 58933Y105 66,328 26,050 64.68 5,426 62.38 0.4419
2020-11-13 2020-09-30 13F MERCK COMMON 58933Y105 40,278 270 0.67 3,341 8.02 0.3413
2020-07-22 2020-06-30 13F MERCK COMMON 58933Y105 40,008 -2,900 -6.76 3,094 -6.30 0.3469
2020-04-27 2020-03-31 13F MERCK COMMON 58933Y105 42,908 2,894 7.23 3,301 -9.29 0.4333
2020-02-05 2019-12-31 13F MERCK COMMON 58933Y105 40,014 -2,360 -5.57 3,639 2.74 0.3844
2019-11-12 2019-09-30 13F MERCK COMMON 58933Y105 42,374 -1,744 -3.95 3,542 -4.24 0.3878
2019-08-06 2019-06-30 13F MERCK COMMON 58933Y105 44,118 -420 -0.94 3,699 -0.13 0.4138
2019-04-30 2019-03-31 13F MERCK COMMON 58933Y105 44,538 -235 -0.52 3,704 8.27 0.4300
2019-02-07 2018-12-31 13F MERCK COMMON 58933Y105 44,773 -4,157 -8.50 3,421 -1.44 0.4407
2018-10-23 2018-09-30 13F MERCK COMMON 58933Y105 48,930 -3,418 -6.53 3,471 9.25 0.3626
2018-08-09 2018-06-30 13F MERCK COMMON 58933Y105 52,348 -14,737 -21.97 3,178 -13.05 0.3544
2018-05-02 2018-03-31 13F MERCK COMMON 58933Y105 67,085 -37,964 -36.14 3,654 -38.18 0.4052
2018-01-30 2017-12-31 13F MERCK COMMON 58933Y105 105,049 -16,602 -13.65 5,911 -24.11 0.6340
2017-11-06 2017-09-30 13F MERCK COMMON 58933Y105 121,651 3,345 2.83 7,789 2.73 0.8852
2017-07-26 2017-06-30 13F MERCK COMMON 58933Y105 118,306 1,508 1.29 7,582 2.17 0.8693
2017-05-02 2017-03-31 13F MERCK COMMON 58933Y105 116,798 -235 -0.20 7,421 7.72 0.8665
2017-01-31 2016-12-31 13F MERCK COMMON 58933Y105 117,033 585 0.50 6,890 -5.20 0.8351
2016-10-27 2016-09-30 13F MERCK COMMON 58933Y105 116,448 408 0.35 7,268 8.71 0.8849
2016-08-12 2016-06-30 13F MERCK COMMON 58933Y105 116,040 -3,054 -2.56 6,685 6.09 0.8328
2016-05-12 2016-03-31 13F MERCK COMMON 58933Y105 119,094 8,960 8.14 6,301 8.32 0.7870
2016-02-02 2015-12-31 13F MERCK COMMON 58933Y105 110,134 -30,434 -21.65 5,817 -16.21 0.7578
2015-11-13 2015-09-30 13F/A-1 MERCK COMMON 58933Y105 140,568 2,805 2.04 6,943 -11.48 0.9554
2015-11-12 2015-09-30 13F MERCK COMMON 58933Y105 137,763 7,843
2015-08-13 2015-06-30 13F MERCK COMMON 58933Y105 137,763 7,793 6.00 7,843 4.98 0.9921
2015-05-14 2015-03-31 13F MERCK COMMON 58933Y105 129,970 45,012 52.98 7,471 54.85 0.9464
2015-02-19 2014-12-31 13F MERCK COMMON 58933Y105 84,958 6,372 8.11 4,825 3.56 0.5932
2014-11-12 2014-09-30 13F MERCK COMMON 58933Y105 78,586 -1,200 -1.50 4,659 0.93 0.5876
2014-08-26 2014-06-30 13F MERCK COMMON 58933Y105 79,786 1,125 1.43 4,616 3.36 0.5692
2014-05-08 2014-03-31 13F MERCK COMMON 58933Y105 78,661 678 0.87 4,466 14.40 0.5738
2014-02-10 2013-12-31 13F MERCK COMMON 58933Y105 77,983 -331 -0.42 3,903 4.69 0.5124
2013-11-05 2013-09-30 13F MERCK COMMON 58933Y105 78,314 5,113 6.98 3,728 9.65 0.5348
2013-07-24 2013-06-30 13F MERCK COMMON 58933Y105 73,201 73,201 3,400 0.5040
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.