Merck & Co., Inc.
DE ˙ XTRA ˙ US58933Y1055
102,78 € ↑2,84 (2,84%)
2026-06-04
AKTIENPREIS
SecurityDE:6MK / Merck & Co., Inc.
InstitutionNatixis Advisors, L.p.
Latest Disclosed Ownership2,970,290 shares
Latest Disclosed Value $ 357,296
Natixis Advisors, L.p. reports 17.52% increase in ownership of 6MK / Merck & Co., Inc.

On May 13, 2026 - Natixis Advisors, L.p. filed a 13F-HR form disclosing ownership of 2,970,290 shares of Merck & Co., Inc. (DE:6MK) valued at $309,504,218 USD as of March 31, 2026. The entity filed a previous 13F-HR on February 10, 2026 disclosing 2,527,577 shares of Merck & Co., Inc.. This represents a change in shares of 17.52% during the quarter. The current value of the position is $305,286,406 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 and COM 58933Y105 2,970,290 442,713 17.52 357 34.21 0.4970
2026-02-10 2025-12-31 13F MERCK and COM 58933Y105 2,527,577 217,330 9.41 266 37.82 0.3771
2025-11-13 2025-09-30 13F MERCK and CO INC COM 58933Y105 2,310,247 371,039 19.13 194 26.14 0.2829
2025-08-13 2025-06-30 13F MERCK and COM 58933Y105 1,939,208 475,556 32.49 154 16.79 0.2435
2025-05-08 2025-03-31 13F MERCK and COM 58933Y105 1,463,652 -175,562 -10.71 131 -19.63 0.2428
2025-02-10 2024-12-31 13F MERCK and COM 58933Y105 1,639,214 407,368 33.07 163 17.27 0.3047
2024-11-06 2024-09-30 13F MERCK and COM 58933Y105 1,231,846 -124,336 -9.17 140 -16.77 0.2728
2024-08-01 2024-06-30 13F MERCK and COM 58933Y105 1,356,182 80,663 6.32 168 -0.60 0.3650
2024-04-25 2024-03-31 13F MERCK and COM 58933Y105 1,275,519 68,495 5.67 168 28.24 0.3869
2024-02-06 2023-12-31 13F MERCK and COM 58933Y105 1,207,024 30,481 2.59 132 8.26 0.3464
2023-11-13 2023-09-30 13F MERCK and COM 58933Y105 1,176,543 -212,763 -15.31 121 -24.37 0.3704
2023-08-15 2023-06-30 13F MERCK and CO IN COM 58933Y105 1,389,306 88,634 6.81 160 15.94 0.4950
2023-05-11 2023-03-31 13F MERCK and COM 58933Y105 1,300,672 24,185 1.89 138 -2.13 0.4762
2023-01-27 2022-12-31 13F MERCK and COM 58933Y105 1,276,487 63,302 5.22 142 -99.87 0.5354
2022-11-14 2022-09-30 13F MERCK COM 58933Y105 1,213,185 17,985 1.50 104,479 -4.12 0.4420
2022-08-12 2022-06-30 13F MERCK and COM 58933Y105 1,195,200 51,618 4.51 108,966 16.13 0.4792
2022-05-12 2022-03-31 13F MERCK and COM 58933Y105 1,143,582 133,471 13.21 93,831 21.21 0.3578
2022-02-08 2021-12-31 13F MERCK and COM 58933Y105 1,010,111 137,380 15.74 77,415 18.10 0.2956
2021-11-15 2021-09-30 13F MERCK and COM 58933Y105 872,731 124,746 16.68 65,551 12.69 0.2696
2021-08-12 2021-06-30 13F MERCK and COM 58933Y105 747,985 32,964 4.61 58,171 5.54 0.2715
2021-05-05 2021-03-31 13F MERCK and COM 58933Y105 715,021 469 0.07 55,119 -5.70 0.2877
2021-02-12 2020-12-31 13F MERCK and COM 58933Y105 714,552 70,380 10.93 58,451 9.39 0.3367
2020-11-12 2020-09-30 13F MERCK and COM 58933Y105 644,172 60,754 10.41 53,434 18.44 0.3362
2020-08-11 2020-06-30 13F MERCK and COM 58933Y105 583,418 -249,221 -29.93 45,116 -29.58 0.2994
2020-04-27 2020-03-31 13F MERCK and COM 58933Y105 832,639 45,386 5.77 64,063 -10.53 0.5221
2020-02-10 2019-12-31 13F MERCK and COM 58933Y105 787,253 21,195 2.77 71,600 11.03 0.5050
2019-11-12 2019-09-30 13F MERCK and COM 58933Y105 766,058 13,006 1.73 64,486 2.13 0.5118
2019-08-12 2019-06-30 13F MERCK and COM 58933Y105 753,052 -91,587 -10.84 63,143 -10.12 0.5157
2019-05-15 2019-03-31 13F/A-1 MERCK and COM 58933Y105 844,639 -63,173 -6.96 70,249 1.27 0.6150
2019-05-15 2019-03-31 13F MERCK and COM 58933Y105 844,639 -63,173 70,249
2019-02-13 2018-12-31 13F/A-1 MERCK and NEW COM 58933Y105 907,812 4,508 0.50 69,366 8.25 0.6849
2019-02-13 2018-12-31 13F MERCK and NEW COM 58933Y105 907,812 4,508 69,366
2018-11-13 2018-09-30 13F MERCK and COM 58933Y105 903,304 44,989 5.24 64,080 23.00 0.5640
2018-08-14 2018-06-30 13F/A-1 MERCK and COM 58933Y105 858,315 24,856 2.98 52,098 14.76 0.4977
2018-08-14 2018-06-30 13F MERCK and COM 58933Y105 858,315 52,098
2018-05-10 2018-03-31 13F MERCK and COM 58933Y105 833,459 10,695 1.30 45,399 -1.94 0.4481
2018-02-14 2017-12-31 13F MERCK and NEW COM 58933Y105 822,764 -142,020 -14.72 46,296 -25.05 0.4715
2017-11-14 2017-09-30 13F MERCK COM 58933Y105 964,784 27,314 2.91 61,773 2.81 0.6526
2017-07-27 2017-06-30 13F MERCK and COM 58933Y105 937,470 22,659 2.48 60,083 3.37 0.6503
2017-05-12 2017-03-31 13F MERCK and COM 58933Y105 914,811 -53,661 -5.54 58,127 1.95 0.6441
2017-02-07 2016-12-31 13F MERCK and COM 58933Y105 968,472 74,464 8.33 57,015 2.19 0.6855
2016-11-04 2016-09-30 13F MERCK and COM 58933Y105 894,008 -16,113 -1.77 55,795 6.41 0.7227
2016-08-01 2016-06-30 13F MERCK and COM 58933Y105 910,121 59,478 6.99 52,432 16.49 0.7249
2016-05-06 2016-03-31 13F MERCK and NEW COM 58933Y105 850,643 79,951 10.37 45,008 10.56 0.6735
2016-02-12 2015-12-31 13F MERCK and COM 58933Y105 770,692 122,091 18.82 40,708 27.07 0.6673
2015-11-12 2015-09-30 13F MERCK and COM 58933Y105 648,601 -70,241 -9.77 32,035 -21.72 0.5556
2015-08-14 2015-06-30 13F MERCK and COM 58933Y105 718,842 123,253 20.69 40,923 19.54 0.6948
2015-05-15 2015-03-31 13F MERCK and COM 58933Y105 595,589 56,786 10.54 34,234 11.88 0.6009
2015-02-05 2014-12-31 13F MERCK and COM 58933Y105 538,803 40,053 8.03 30,599 3.50 0.5727
2014-11-03 2014-09-30 13F MERCK and COM 58933Y105 498,750 -35,257 -6.60 29,565 -4.30 0.5932
2014-08-13 2014-06-30 13F MERCK COM 58933Y105 534,007 9,332 1.78 30,893 3.72 0.4426
2014-05-13 2014-03-31 13F MERCK & CO INC COM 58933Y105 524,675 58,688 12.59 29,786 27.72 0.4584
2014-02-12 2013-12-31 13F MERCK COM 58933Y105 465,987 27,410 6.25 23,322 11.70 0.3817
2013-10-30 2013-09-30 13F MERCK COM 58933Y105 438,577 21,709 5.21 20,880 7.83 0.3845
2013-07-19 2013-06-30 13F MERCK COM 58933Y105 416,868 416,868 19,364 0.3858
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.