Merck & Co., Inc.
BG ˙ BUL ˙ US58933Y1055
SecurityBG:6MK / Merck & Co., Inc.
InstitutionOld Port Advisors
Latest Disclosed Ownership7,057 shares
Latest Disclosed Value $ 848,887
Old Port Advisors reports 4.27% increase in ownership of 6MK / Merck & Co., Inc.

On April 6, 2026 - Old Port Advisors filed a 13F-HR form disclosing ownership of 7,057 shares of Merck & Co., Inc. (BG:6MK) valued at $848,887 USD as of March 31, 2026. The entity filed a previous 13F-HR on January 8, 2026 disclosing 6,768 shares of Merck & Co., Inc.. This represents a change in shares of 4.27% 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)
2026-04-06 2026-03-31 13F Merck & Co Inc Common Stock 58933Y105 7,057 289 4.27 849 19.10 0.1954
2026-01-08 2025-12-31 13F Merck & Co Inc Common Stock 58933Y105 6,768 -35 -0.51 712 24.91 0.1749
2025-10-06 2025-09-30 13F Merck & Co Inc Common Stock 58933Y105 6,803 -218 -3.10 571 2.70 0.1434
2025-07-16 2025-06-30 13F Merck & Co Inc Common Stock 58933Y105 7,021 -46 -0.65 556 -12.46 0.1516
2025-05-06 2025-03-31 13F Merck & Co Inc Common Stock 58933Y105 7,067 -1,037 -12.80 634 -21.34 0.1877
2025-01-02 2024-12-31 13F MERCK COM 58933Y105 8,104 -260 -3.11 806 -15.07 0.2317
2024-10-24 2024-09-30 13F MERCK COM 58933Y105 8,364 512 6.52 950 -2.37 0.2638
2024-07-18 2024-06-30 13F MERCK COM 58933Y105 7,852 909 13.09 972 6.11 0.2903
2024-06-26 2024-03-31 13F MERCK COM 58933Y105 6,943 -443 -6.00 916 13.79 0.2804
2024-06-26 2023-12-31 13F MERCK COM 58933Y105 7,386 -283 -3.69 805 2.03 0.2675
2023-11-14 2023-09-30 13F MERCK COM 58933Y105 7,669 767 11.11 790 1.68 0.2865
2023-04-12 2023-03-31 13F MERCK COM 58933Y105 6,902 -61 -0.88 776 0.52 0.2794
2023-01-11 2022-12-31 13F MERCK COM 58933Y105 6,963 80 1.16 773 26.97 0.2910
2022-10-13 2022-09-30 13F MERCK COM 58933Y105 6,883 -206 -2.91 608 -7.46 0.2418
2022-07-08 2022-06-30 13F MERCK COM 58933Y105 7,089 -40 -0.56 657 10.42 0.2542
2022-04-12 2022-03-31 13F MERCK COM 58933Y105 7,129 -25 -0.35 595 5.50 0.2025
2022-01-12 2021-12-31 13F MERCK COM 58933Y105 7,154 2,224 45.11 564 41.71 0.1910
2021-10-12 2021-09-30 13F MERCK COM 58933Y105 4,930 -396 -7.44 398 -3.63 0.1442
2021-07-20 2021-06-30 13F MERCK COM 58933Y105 5,326 -2,412 -31.17 413 -30.82 0.1486
2021-04-08 2021-03-31 13F MERCK & CO. COM 58933Y105 7,738 568 7.92 597 2.93 0.2343
2021-01-08 2020-12-31 13F MERCK & CO. COM 58933Y105 7,170 505 7.58 580 4.88 0.2520
2020-10-08 2020-09-30 13F MERCK & CO. COM 58933Y105 6,665 295 4.63 553 12.17 0.2731
2020-07-08 2020-06-30 13F MERCK & CO. COM 58933Y105 6,370 -45 -0.70 493 -0.20 0.2581
2020-04-17 2020-03-31 13F MERCK & CO. COM 58933Y105 6,415 2,705 72.91 494 45.29 0.3014
2020-01-09 2019-12-31 13F MERCK COM 58933Y105 3,710 302 8.86 340 17.24 0.1642
2019-10-10 2019-09-30 13F MERCK COM 58933Y105 3,408 -23 -0.67 290 -2.68 0.1518
2019-07-12 2019-06-30 13F MERCK COM 58933Y105 3,431 -104 -2.94 298 1.36 0.1529
2019-04-08 2019-03-31 13F MERCK COM 58933Y105 3,535 -408 -10.35 294 -1.67 0.1542
2019-01-30 2018-12-31 13F MERCK COM 58933Y105 3,943 215 5.77 299 32.30 0.1675
2018-09-24 2018-06-30 13F MERCK COM 58933Y105 3,728 3,728 226 0.1219
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.