Merck & Co., Inc.
BG ˙ BUL ˙ US58933Y1055
SecurityBG:6MK / Merck & Co., Inc.
InstitutionCongress Park Capital LLC
Latest Disclosed Ownership5,060 shares
Latest Disclosed Value $ 608,668
Congress Park Capital LLC reports 8.99% decrease in ownership of 6MK / Merck & Co., Inc.

On April 14, 2026 - Congress Park Capital LLC filed a 13F-HR form disclosing ownership of 5,060 shares of Merck & Co., Inc. (BG:6MK) valued at $608,668 USD as of March 31, 2026. The entity filed a previous 13F-HR on January 14, 2026 disclosing 5,560 shares of Merck & Co., Inc.. This represents a change in shares of -8.99% 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)
2026-04-14 2026-03-31 13F MERCK COM 58933Y105 5,060 -500 -8.99 609 3.93 0.1869
2026-01-14 2025-12-31 13F MERCK COM 58933Y105 5,560 0 0.00 585 25.54 0.1747
2025-10-08 2025-09-30 13F MERCK COM 58933Y105 5,560 0 0.00 467 5.91 0.1450
2025-07-11 2025-06-30 13F MERCK COM 58933Y105 5,560 -21 -0.38 440 -12.00 0.1443
2025-04-22 2025-03-31 13F MERCK COM 58933Y105 5,581 -500 -8.22 501 -17.22 0.1897
2025-01-15 2024-12-31 13F MERCK COM 58933Y105 6,081 -250 -3.95 605 -15.88 0.2197
2024-10-09 2024-09-30 13F MERCK COM 58933Y105 6,331 0 0.00 719 -8.30 0.2665
2024-07-12 2024-06-30 13F MERCK COM 58933Y105 6,331 21 0.33 784 -5.89 0.3148
2024-04-16 2024-03-31 13F MERCK COM 58933Y105 6,310 -250 -3.81 833 16.36 0.3685
2024-01-19 2023-12-31 13F MERCK COM 58933Y105 6,560 -900 -12.06 715 -6.90 0.3495
2023-10-13 2023-09-30 13F MERCK COM 58933Y105 7,460 0 0.00 768 -10.70 0.3996
2023-07-14 2023-06-30 13F MERCK COM 58933Y105 7,460 -100 -1.32 861 6.97 0.4298
2023-04-20 2023-03-31 13F MERCK COM 58933Y105 7,560 -25 -0.33 804 -4.40 0.4180
2023-01-30 2022-12-31 13F MERCK COM 58933Y105 7,585 -605 -7.39 842 19.29 0.4936
2022-10-19 2022-09-30 13F MERCK COM 58933Y105 8,190 0 0.00 705 -5.62 0.4081
2022-07-22 2022-06-30 13F MERCK COM 58933Y105 8,190 -580 -6.61 747 3.75 0.4537
2022-05-02 2022-03-31 13F MERCK COM 58933Y105 8,770 1 0.01 720 7.14 0.3611
2022-02-09 2021-12-31 13F MERCK COM 58933Y105 8,769 -261 -2.89 672 -0.88 0.3310
2021-11-03 2021-09-30 13F MERCK COM 58933Y105 9,030 -99 -1.08 678 -4.51 0.3468
2021-08-13 2021-06-30 13F MERCK COM 58933Y105 9,129 -124 -1.34 710 -0.42 0.3557
2021-04-19 2021-03-31 13F MERCK & CO. COM 58933Y105 9,253 1 0.01 713 -5.81 0.3984
2021-01-19 2020-12-31 13F MERCK & CO. COM 58933Y105 9,252 -24 -0.26 757 -1.56 0.4482
2020-10-20 2020-09-30 13F MERCK & CO. COM 58933Y105 9,276 1,277 15.96 769 24.23 0.4761
2020-07-27 2020-06-30 13F MERCK & CO. COM 58933Y105 7,999 1 0.01 619 0.65 0.4752
2020-05-04 2020-03-31 13F MERCK & CO. COM 58933Y105 7,998 -277 -3.35 615 -18.33 0.5547
2020-01-31 2019-12-31 13F MERCK COM 58933Y105 8,275 403 5.12 753 13.57 0.5555
2019-10-24 2019-09-30 13F MERCK COM 58933Y105 7,872 0 0.00 663 3.43 0.5564
2019-08-02 2019-06-30 13F MERCK COM 58933Y105 7,872 3 0.04 641 -1.99 0.5070
2019-04-18 2019-03-31 13F MERCK COM 58933Y105 7,869 1 0.01 654 8.82 0.5652
2019-02-05 2018-12-31 13F MERCK COM 58933Y105 7,868 -499 -5.96 601 1.18 0.6619
2018-10-29 2018-09-30 13F MERCK COM 58933Y105 8,367 1 0.01 594 16.93 0.5331
2018-08-06 2018-06-30 13F MERCK COM 58933Y105 8,366 101 1.22 508 12.89 0.4872
2018-04-17 2018-03-31 13F MERCK COM 58933Y105 8,265 201 2.49 450 -0.88 0.4623
2018-02-13 2017-12-31 13F MERCK COM 58933Y105 8,064 8,064 454 0.4574
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.