Merck & Co., Inc.
BG ˙ BUL ˙ US58933Y1055
SecurityBG:6MK / Merck & Co., Inc.
InstitutionBaxter Bros Inc
Latest Disclosed Ownership9,567 shares
Latest Disclosed Value $ 1,150,782
Baxter Bros Inc reports 3.04% decrease in ownership of 6MK / Merck & Co., Inc.

On April 28, 2026 - Baxter Bros Inc filed a 13F-HR form disclosing ownership of 9,567 shares of Merck & Co., Inc. (BG:6MK) valued at $1,150,782 USD as of March 31, 2026. The entity filed a previous 13F-HR on January 26, 2026 disclosing 9,867 shares of Merck & Co., Inc.. This represents a change in shares of -3.04% 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)
2026-04-28 2026-03-31 13F MERCK COM 58933Y105 9,567 -300 -3.04 1,151 10.79 0.1421
2026-01-26 2025-12-31 13F MERCK COM 58933Y105 9,867 -60 -0.60 1,039 24.61 0.1202
2025-10-14 2025-09-30 13F MERCK COM 58933Y105 9,927 -645 -6.10 833 -0.36 0.0963
2025-07-24 2025-06-30 13F MERCK COM 58933Y105 10,572 -1,000 -8.64 837 -19.46 0.1024
2025-04-09 2025-03-31 13F MERCK COM 58933Y105 11,572 -1,992 -14.69 1,039 -23.05 0.1368
2025-02-12 2024-12-31 13F MERCK COM 58933Y105 13,564 -1,556 -10.29 1,349 -21.39 0.1765
2024-10-29 2024-09-30 13F MERCK COM 58933Y105 15,120 -1,414 -8.55 1,717 -16.13 0.2232
2024-07-15 2024-06-30 13F MERCK COM 58933Y105 16,534 -1,013 -5.77 2,047 -11.62 0.2679
2024-04-29 2024-03-31 13F MERCK COM 58933Y105 17,547 -4,854 -21.67 2,315 -5.20 0.2970
2024-05-17 2023-12-31 13F/A-1 MERCK COM 58933Y105 22,401 26 0.12 2,442 6.04 0.3383
2024-02-06 2023-12-31 13F Merck COM 58933Y105 21,901 -474 2,388 0.3375
2024-05-17 2023-09-30 13F/A-1 MERCK COM 58933Y105 22,375 -534 -2.33 2,303 -12.86 0.3497
2023-10-23 2023-09-30 13F Merck COM 58933Y105 22,375 -534 2,303 0.3542
2023-08-14 2023-06-30 13F Merck COM 58933Y105 22,909 -219 -0.95 2,643 7.44 0.3932
2023-05-15 2023-03-31 13F Merck COM 58933Y105 23,128 -179 -0.77 2,461 -4.87 0.3868
2023-02-01 2022-12-31 13F Merck COM 58933Y105 23,307 1,001 4.49 2,586 34.62 0.4251
2022-11-14 2022-09-30 13F Merck COM 58933Y105 22,306 4,891 28.08 1,921 20.97 0.3404
2022-07-25 2022-06-30 13F Merck COM 58933Y105 17,415 -299 -1.69 1,588 9.29 0.2850
2022-04-20 2022-03-31 13F Merck COM 58933Y105 17,714 71 0.40 1,453 7.47 0.2182
2022-01-14 2021-12-31 13F Merck COM 58933Y105 17,643 -1,988 -10.13 1,352 -8.28 0.1959
2021-10-25 2021-09-30 13F Merck COM 58933Y105 19,631 -954 -4.63 1,474 -7.93 0.2359
2021-08-11 2021-06-30 13F Merck COM 589331107 20,585 -1,267 -5.80 1,601 -4.99 0.2537
2021-04-23 2021-03-31 13F Merck COM 589331107 21,852 2,343 12.01 1,685 5.58 0.2895
2021-01-25 2020-12-31 13F Merck COM 589331107 19,509 7,058 56.69 1,596 54.50 0.3023
2020-11-05 2020-09-30 13F Merck COM 589331107 12,451 2,127 20.60 1,033 29.45 0.2234
2020-07-31 2020-06-30 13F Merck COM 589331107 10,324 331 3.31 798 3.77 0.1873
2020-04-17 2020-03-31 13F Merck COM 589331107 9,993 731 7.89 769 -8.67 0.1992
2020-01-10 2019-12-31 13F/A-20 Merck COM 589331107 9,262 606 7.00 842 15.50 0.1753
2020-01-09 2019-12-31 13F Merck COM 589331107 11,007 2,351 625 222,160.6097
2019-10-21 2019-09-30 13F Merck COM 589331107 8,656 -44 -0.51 729 0.00 0.1650
2019-07-29 2019-06-30 13F Merck COM 589331107 8,700 1 0.01 729 0.83 0.1666
2019-04-22 2019-03-31 13F Merck COM 589331107 8,699 -222 -2.49 723 6.01 0.1689
2019-01-22 2018-12-31 13F Merck COM 589331107 8,921 323 3.76 682 11.80 0.1850
2018-10-11 2018-09-30 13F Merck COM 589331107 8,598 -499 -5.49 610 10.51 0.1464
2018-07-17 2018-06-30 13F Merck COM 589331107 9,097 1 0.01 552 11.52 0.1484
2018-05-16 2018-03-31 13F Merck COM 589331107 9,096 -299 -3.18 495 -6.43 0.1350
2018-02-01 2017-12-31 13F Merck COM 589331107 9,395 796 9.26 529 -3.99 0.1450
2017-10-16 2017-09-30 13F Merck COM 589331107 8,599 1 0.01 551 0.00 0.1583
2017-08-01 2017-06-30 13F Merck COM 589331107 8,598 1 0.01 551 0.92 0.1659
2017-04-24 2017-03-31 13F Merck COM 589331107 8,597 1 0.01 546 7.91 0.1708
2017-01-19 2016-12-31 13F Merck COM 589331107 8,596 -1,341 -13.50 506 -18.39 0.1629
2016-10-20 2016-09-30 13F Merck COM 589331107 9,937 -2,025 -16.93 620 -10.01 0.2096
2016-07-07 2016-06-30 13F Merck COM 589331107 11,962 116 0.98 689 10.06 0.2409
2016-02-08 2015-12-31 13F Merck COM 589331107 11,846 304 2.63 626 -4.72 0.2320
2015-10-05 2015-09-30 13F Merck COM 589331107 11,542 0 0.00 657 0.00 0.2412
2015-07-07 2015-06-30 13F Merck COM 589331107 11,542 134 1.17 657 0.15 0.2410
2015-04-16 2015-03-31 13F Merck COM 589331107 11,408 401 3.64 656 4.96 0.2386
2015-01-22 2014-12-31 13F Merck COM 589331107 11,007 101 0.93 625 -3.40 0.2262
2014-11-04 2014-09-30 13F Merck COM 589331107 10,906 177 1.65 647 4.19 0.2517
2014-07-11 2014-06-30 13F Merck COM 589331107 10,729 485 4.73 621 6.70 0.2557
2014-04-08 2014-03-31 13F Merck COM 589331107 10,244 0 0.00 582 13.45 0.2642
2014-02-10 2013-12-31 13F Merck COM 589331107 10,244 60 0.59 513 5.77 0.2403
2013-10-28 2013-09-30 13F Merck COM 589331107 10,184 -25 -0.24 485 2.32 0.2651
2013-08-21 2013-06-30 13F Merck COM 589331107 10,209 10,209 474 0.2874
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.