Merck & Co., Inc.
BG ˙ BUL ˙ US58933Y1055
SecurityBG:6MK / Merck & Co., Inc.
InstitutionNorthstar Group, Inc.
Latest Disclosed Ownership24,246 shares
Latest Disclosed Value $ 2,916,607
Northstar Group, Inc. reports 4.22% increase in ownership of 6MK / Merck & Co., Inc.

On April 28, 2026 - Northstar Group, Inc. filed a 13F-HR form disclosing ownership of 24,246 shares of Merck & Co., Inc. (BG:6MK) valued at $2,916,607 USD as of March 31, 2026. The entity filed a previous 13F-HR on February 13, 2026 disclosing 23,265 shares of Merck & Co., Inc.. This represents a change in shares of 4.22% 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.

Upgrade to unlock premium data and export to Excel .

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)
2026-04-28 2026-03-31 13F MERCK COM 58933Y105 24,246 981 4.22 2,917 19.07 0.4123
2026-02-13 2025-12-31 13F MERCK COM 58933Y105 23,265 -180 -0.77 2,449 24.50 0.3336
2025-10-22 2025-09-30 13F MERCK COM 58933Y105 23,445 -70 -0.30 1,968 5.70 0.2866
2025-07-18 2025-06-30 13F MERCK COM 58933Y105 23,515 -1,314 -5.29 1,862 -16.47 0.2875
2025-04-17 2025-03-31 13F MERCK COM 58933Y105 24,829 1,759 7.62 2,229 -2.92 0.3613
2025-01-28 2024-12-31 13F MERCK COM 58933Y105 23,070 265 1.16 2,295 -11.36 0.3844
2024-10-09 2024-09-30 13F MERCK COM 58933Y105 22,805 0 0.00 2,590 -8.29 0.4511
2024-07-18 2024-06-30 13F MERCK COM 58933Y105 22,805 -717 -3.05 2,823 -9.02 0.5337
2024-04-18 2024-03-31 13F MERCK COM 58933Y105 23,522 -460 -1.92 3,104 18.71 0.6096
2024-01-10 2023-12-31 13F MERCK COM 58933Y105 23,982 -3,450 -12.58 2,615 -7.44 0.5679
2023-10-19 2023-09-30 13F MERCK COM 58933Y105 27,432 -50 -0.18 2,824 -10.94 0.6695
2023-08-03 2023-06-30 13F MERCK COM 58933Y105 27,482 150 0.55 3,171 9.08 0.7435
2023-04-27 2023-03-31 13F MERCK COM 58933Y105 27,332 -580 -2.08 2,908 -6.10 0.7457
2023-01-26 2022-12-31 13F MERCK COM 58933Y105 27,912 2,920 11.68 3,097 43.87 0.8780
2022-10-26 2022-09-30 13F MERCK COM 58933Y105 24,992 0 0.00 2,152 -5.57 0.6449
2022-07-27 2022-06-30 13F MERCK COM 58933Y105 24,992 -76 -0.30 2,279 10.74 0.6590
2022-05-05 2022-03-31 13F MERCK COM 58933Y105 25,068 -131 -0.52 2,058 6.58 0.4945
2022-01-31 2021-12-31 13F MERCK COM 58933Y105 25,199 -18 -0.07 1,931 2.01 0.4607
2021-11-02 2021-09-30 13F MERCK COM 58933Y105 25,217 1,750 7.46 1,893 3.73 0.4921
2021-07-28 2021-06-30 13F MERCK COM 58933Y105 23,467 -175 -0.74 1,825 0.11 0.4778
2021-05-10 2021-03-31 13F MERCK & CO. COM 58933Y105 23,642 455 1.96 1,823 -3.85 0.5143
2021-02-09 2020-12-31 13F MERCK & CO. COM 58933Y105 23,187 -790 -3.29 1,896 -4.68 0.5818
2020-11-12 2020-09-30 13F MERCK & CO. COM 58933Y105 23,977 3,325 16.10 1,989 24.55 0.6854
2020-08-11 2020-06-30 13F MERCK & CO. COM 58933Y105 20,652 4,665 29.18 1,597 29.84 0.6439
2020-05-04 2020-03-31 13F MERCK & CO. COM 58933Y105 15,987 -339 -2.08 1,230 -17.17 0.5616
2020-01-21 2019-12-31 13F MERCK COM 58933Y105 16,326 -173 -1.05 1,485 6.91 0.5672
2019-11-01 2019-09-30 13F MERCK COM 58933Y105 16,499 -461 -2.72 1,389 -2.32 0.5770
2019-07-12 2019-06-30 13F MERCK COM 58933Y105 16,960 192 1.15 1,422 1.94 0.6014
2019-04-16 2019-03-31 13F MERCK COM 58933Y105 16,768 -628 -3.61 1,395 4.97 0.6230
2019-01-22 2018-12-31 13F MERCK COM 58933Y105 17,396 -725 -4.00 1,329 3.42 0.6759
2018-10-26 2018-09-30 13F MERCK COM 58933Y105 18,121 -174 -0.95 1,285 15.77 0.5873
2018-07-27 2018-06-30 13F MERCK COM 58933Y105 18,295 -431 -2.30 1,110 8.82 0.5651
2018-04-13 2018-03-31 13F MERCK COM 58933Y105 18,726 -1,135 -5.71 1,020 -8.77 0.5301
2018-01-31 2017-12-31 13F/A-1 MERCK COM 58933Y105 19,861 6,755 51.54 1,118 33.25 0.5892
2018-01-23 2017-12-31 13F MERCK COM 58933Y105 19,861 6,755 1,118
2017-10-16 2017-09-30 13F MERCK COM 58933Y105 13,106 273 2.13 839 2.07 0.4840
2017-07-12 2017-06-30 13F MERCK COM 58933Y105 12,833 55 0.43 822 1.36 0.5073
2017-04-06 2017-03-31 13F MERCK COM 58933Y105 12,778 58 0.46 811 8.28 0.5373
2017-01-06 2016-12-31 13F MERCK COM 58933Y105 12,720 154 1.23 749 -4.46 0.5163
2016-11-14 2016-09-30 13F MERCK COM 58933Y105 12,566 58 0.46 784 8.74 0.5634
2016-07-12 2016-06-30 13F MERCK COM 58933Y105 12,508 61 0.49 721 9.41 0.5369
2016-04-15 2016-03-31 13F MERCK & CO INC COM 58933Y105 12,447 79 0.64 659 0.92 0.5028
2016-01-26 2015-12-31 13F MERCK & CO INC COM 58933Y105 12,368 83 0.68 653 6.01 0.5181
2015-10-19 2015-09-30 13F MERCK & CO INC COM 58933Y105 12,285 70 0.57 616 -11.37 0.5038
2015-07-30 2015-06-30 13F MERCK & CO INC COM 58933Y105 12,215 70 0.58 695 -0.43 0.5306
2015-04-24 2015-03-31 13F MERCK & CO INC COM 58933Y105 12,145 12,145 698 0.5380
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.