Merck & Co., Inc.
BG ˙ BUL ˙ US58933Y1055
SecurityBG:6MK / Merck & Co., Inc.
InstitutionNeuberger Berman Group LLC
Latest Disclosed Ownership3,280,851 shares
Latest Disclosed Value $ 394,610,949
Neuberger Berman Group LLC reports 7.93% increase in ownership of 6MK / Merck & Co., Inc.

On May 14, 2026 - Neuberger Berman Group LLC filed a 13F-HR form disclosing ownership of 3,280,851 shares of Merck & Co., Inc. (BG:6MK) valued at $394,610,949 USD as of March 31, 2026. The entity filed a previous 13F-HR on February 13, 2026 disclosing 3,039,898 shares of Merck & Co., Inc.. This represents a change in shares of 7.93% 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)
2026-05-14 2026-03-31 13F MERCK Common 58933Y105 3,280,851 240,953 7.93 394,611 23.30 0.1535
2026-02-13 2025-12-31 13F MERCK Common 58933Y105 3,039,898 427,885 16.38 320,032 46.16 0.2382
2025-11-12 2025-09-30 13F MERCK Common 58933Y105 2,612,013 1,369,306 110.19 218,958 122.58 0.1600
2025-08-25 2025-06-30 13F/A-1 MERCK Common 58933Y105 1,242,707 -74,410 -5.65 98,373 -16.79 0.0757
2025-08-13 2025-06-30 13F MERCK Common 58933Y105 1,242,707 -74,410 98,373 0.0392
2025-05-13 2025-03-31 13F MERCK Common 58933Y105 1,317,117 -69,310 -5.00 118,224 -14.28 0.0990
2025-02-13 2024-12-31 13F MERCK Common 58933Y105 1,386,427 -145,832 -9.52 137,922 -20.74 0.1095
2024-11-14 2024-09-30 13F MERCK Common 58933Y105 1,532,259 -3,569,813 -69.97 174,003 -72.49 0.1358
2024-11-14 2024-06-30 13F/A-1 MERCK Common 58933Y105 5,102,072 -422,235 -7.64 632,459 -13.23 0.5191
2024-08-13 2024-06-30 13F MERCK Common 58933Y105 5,102,072 -422,235 632,459 0.5191
2024-11-14 2024-03-31 13F/A-1 MERCK Common 58933Y105 5,524,307 -752,851 -11.99 728,904 6.52 0.6025
2024-05-13 2024-03-31 13F MERCK Common 58933Y105 5,524,307 -752,851 728,904 0.6024
2024-11-14 2023-12-31 13F/A-2 MERCK Common 58933Y105 6,277,158 -503,156 -7.42 684,296 -2.00 0.5967
2024-02-09 2023-12-31 13F MERCK Common 58933Y105 6,277,158 -503,156 684,296 0.5967
2023-11-14 2023-09-30 13F MERCK Common 58933Y105 6,780,314 115,761 1.74 698,253 -9.17 0.6362
2023-08-11 2023-06-30 13F MERCK Common 58933Y105 6,664,553 21,598 0.33 768,746 8.78 0.6874
2023-05-12 2023-03-31 13F MERCK Common 58933Y105 6,642,955 893,583 15.54 706,681 10.79 0.6554
2023-02-13 2022-12-31 13F MERCK Common 58933Y105 5,749,372 -90,941 -1.56 637,878 26.79 0.6253
2022-11-15 2022-09-30 13F MERCK Common 58933Y105 5,840,313 1,897,517 48.13 503,115 39.91 0.5253
2022-08-15 2022-06-30 13F MERCK Common 58933Y105 3,942,796 743,969 23.26 359,597 36.99 0.3614
2022-05-23 2022-03-31 13F/A-1 MERCK Common 58933Y105 3,198,827 671,679 26.58 262,504 37.53 0.2224
2022-05-13 2022-03-31 13F MERCK Common 58933Y105 3,198,827 671,679 259,086 0.1156
2022-02-11 2021-12-31 13F MERCK Common 58933Y105 2,527,148 1,995,842 375.65 190,865 402.24 0.1497
2021-11-12 2021-09-30 13F MERCK Common 58933Y105 531,306 -4,871 -0.91 38,003 -5.05 0.0332
2021-08-13 2021-06-30 13F MERCK Common 58933Y105 536,177 -1,573 -0.29 40,025 -2.44 0.0349
2021-05-13 2021-03-31 13F MERCK Common 58933Y105 537,750 -38,671 -6.71 41,027 -12.56 0.0392
2021-02-10 2020-12-31 13F MERCK Common 58933Y105 576,421 4,315 0.75 46,918 -0.80 0.0486
2020-11-12 2020-09-30 13F MERCK Common 58933Y105 572,106 -54,867 -8.75 47,296 -2.29 0.0561
2020-08-13 2020-06-30 13F MERCK Common 58933Y105 626,973 -25,870 -3.96 48,406 -3.65 0.0602
2020-05-14 2020-03-31 13F MERCK Common 58933Y105 652,843 -42,087 -6.06 50,240 -20.52 0.0766
2020-02-12 2019-12-31 13F MERCK Common 58933Y105 694,930 -196,140 -22.01 63,213 -15.73 0.0738
2019-11-13 2019-09-30 13F MERCK Common 58933Y105 891,070 -171,214 -16.12 75,011 -15.79 0.0916
2019-08-13 2019-06-30 13F MERCK Common 58933Y105 1,062,284 -2,071 -0.19 89,073 0.62 0.1065
2019-05-13 2019-03-31 13F MERCK Common 58933Y105 1,064,355 -3,191 -0.30 88,522 8.52 0.1085
2019-02-12 2018-12-31 13F MERCK Common 58933Y105 1,067,546 -47,678 -4.28 81,571 3.11 0.1137
2018-11-16 2018-09-30 13F/A-1 MERCK Common 58933Y105 1,115,224 84,135 8.16 79,114 26.15 0.0896
2018-11-13 2018-09-30 13F MERCK Common 58933Y105 1,115,224 84,135 79,114
2018-08-13 2018-06-30 13F MERCK Common 58933Y105 1,031,089 321,547 45.32 62,716 61.85 0.0692
2018-05-08 2018-03-31 13F MERCK Common 58933Y105 709,542 -216,361 -23.37 38,749 -25.75 0.0443
2018-02-14 2017-12-31 13F MERCK Common 58933Y105 925,903 -886,492 -48.91 52,187 -55.03 0.0600
2017-11-15 2017-09-30 13F MERCK COMMON STOCK 58933Y105 1,812,395 -2,934 -0.16 116,048 -0.25 0.1452
2017-08-08 2017-06-30 13F MERCK COMMON STOCK 58933Y105 1,815,329 -94,008 -4.92 116,344 -4.10 0.1494
2017-05-10 2017-03-31 13F MERCK COMMON STOCK 58933Y105 1,909,337 70,187 3.82 121,319 12.05 0.1566
2017-02-06 2016-12-31 13F MERCK COMMON STOCK 58933Y105 1,839,150 161,011 9.59 108,271 3.38 0.1454
2016-11-02 2016-09-30 13F MERCK COMMON STOCK 58933Y105 1,678,139 187,441 12.57 104,733 21.95 0.1421
2016-08-05 2016-06-30 13F MERCK COMMON STOCK 58933Y105 1,490,698 3,775 0.25 85,879 9.16 0.1183
2016-05-06 2016-03-31 13F MERCK COMMON STOCK 58933Y105 1,486,923 919,522 162.06 78,673 162.51 0.1082
2016-01-28 2015-12-31 13F MERCK COMMON STOCK 58933Y105 567,401 8,317 1.49 29,970 8.54 0.0392
2015-11-10 2015-09-30 13F MERCK COMMON STOCK 58933Y105 559,084 -183,802 -24.74 27,613 -34.71 0.0356
2015-07-31 2015-06-30 13F MERCK COMMON STOCK 58933Y105 742,886 -9,759 -1.30 42,292 -2.24 0.0470
2015-05-06 2015-03-31 13F MERCK COMMON STOCK 58933Y105 752,645 752,645 0.00 43,262 0.0462
2015-02-05 2014-12-31 13F MERCK COMMON STOCK 58933Y105 0 -1,460,383 -100.00 0 -100.00
2014-11-04 2014-09-30 13F MERCK COMMON STOCK 58933Y105 1,460,383 -31,958 -2.14 86,571 0.28 0.0888
2014-08-05 2014-06-30 13F MERCK COMMON STOCK 58933Y105 1,492,341 -313,047 -17.34 86,332 -15.77 0.0843
2014-05-05 2014-03-31 13F MERCK COMMON STOCK 58933Y105 1,805,388 51,462 2.93 102,492 16.75 0.1042
2014-02-11 2013-12-31 13F MERCK COMMON STOCK 58933Y105 1,753,926 322,292 22.51 87,784 28.79 0.0902
2013-10-29 2013-09-30 13F/A-1 MERCK COMMON STOCK 58933Y105 1,431,634 -326,287 -18.56 68,158 -16.53 0.0757
2013-10-29 2013-09-30 13F MERCK COMMON STOCK 58933Y105 1,445,068 55,491
2013-08-13 2013-06-30 13F MERCK COMMON STOCK 58933Y105 1,757,921 1,757,921 81,655 0.0971
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.