Merck & Co., Inc.
MX ˙ BMV ˙ US58933Y1055
SecurityMX:MRK / Merck & Co., Inc.
InstitutionJT Stratford LLC
Latest Disclosed Ownership7,035 shares
Latest Disclosed Value $ 846,200
JT Stratford LLC reports 35.53% decrease in ownership of MRK / Merck & Co., Inc.

On May 15, 2026 - JT Stratford LLC filed a 13F-HR form disclosing ownership of 7,035 shares of Merck & Co., Inc. (MX:MRK) valued at $846,200 USD as of March 31, 2026. The entity filed a previous 13F-HR on February 12, 2026 disclosing 10,912 shares of Merck & Co., Inc.. This represents a change in shares of -35.53% 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)
2026-05-15 2026-03-31 13F MERCK COM 58933Y105 7,035 -3,877 -35.53 846 -26.31 0.1077
2026-02-12 2025-12-31 13F MERCK COM 58933Y105 10,912 -2,102 -16.15 1,149 5.13 0.1475
2025-11-12 2025-09-30 13F MERCK COM 58933Y105 13,014 -4,601 -26.12 1,092 -21.66 0.1463
2025-08-13 2025-06-30 13F MERCK COM 58933Y105 17,615 -1,043 -5.59 1,394 -16.73 0.2110
2025-05-14 2025-03-31 13F MERCK COM 58933Y105 18,658 12,268 191.99 1,675 163.62 0.2961
2025-02-18 2024-12-31 13F MERCK COM 58933Y105 6,390 -50 -0.78 636 -13.13 0.1045
2024-11-14 2024-09-30 13F MERCK COM 58933Y105 6,440 557 9.47 731 0.41 0.1251
2024-08-14 2024-06-30 13F MERCK COM 58933Y105 5,883 -154 -2.55 728 -8.54 0.1353
2024-05-14 2024-03-31 13F MERCK COM 58933Y105 6,037 -298 -4.70 797 15.36 0.1586
2024-02-14 2023-12-31 13F MERCK COM 58933Y105 6,335 115 1.85 691 7.81 0.1579
2023-11-14 2023-09-30 13F MERCK COM 58933Y105 6,220 -5,803 -48.27 640 -53.86 0.1652
2023-08-14 2023-06-30 13F MERCK COM 58933Y105 12,023 5,901 96.39 1,387 113.06 0.3734
2023-05-10 2023-03-31 13F MERCK COM 58933Y105 6,122 -1,558 -20.29 651 -23.59 0.1872
2023-02-14 2022-12-31 13F MERCK COM 58933Y105 7,680 3,045 65.70 852 113.53 0.2724
2022-11-14 2022-09-30 13F MERCK COM 58933Y105 4,635 -157 -3.28 399 -8.70 0.1419
2022-08-15 2022-06-30 13F MERCK COM 58933Y105 4,792 -177 -3.56 437 7.11 0.1384
2022-05-12 2022-03-31 13F MERCK COM 58933Y105 4,969 -1,161 -18.94 408 -13.19 0.1193
2022-02-11 2021-12-31 13F MERCK COM 58933Y105 6,130 243 4.13 470 6.33 0.1287
2021-11-15 2021-09-30 13F MERCK COM 58933Y105 5,887 -89 -1.49 442 -4.95 0.1357
2021-08-16 2021-06-30 13F MERCK COM 58933Y105 5,976 27 0.45 465 1.31 0.1487
2021-05-12 2021-03-31 13F MERCK & CO. COM 58933Y105 5,949 -517 -8.00 459 -13.23 0.1618
2021-02-16 2020-12-31 13F MERCK & CO. COM 58933Y105 6,466 403 6.65 529 5.17 0.1983
2020-11-13 2020-09-30 13F MERCK & CO. COM 58933Y105 6,063 -2,741 -31.13 503 -26.14 0.2168
2020-08-14 2020-06-30 13F MERCK & CO. COM 58933Y105 8,804 2,563 41.07 681 41.88 0.3506
2020-05-14 2020-03-31 13F MERCK & CO. COM 58933Y105 6,241 -1,687 -21.28 480 -33.43 0.2940
2020-02-14 2019-12-31 13F MERCK COM 58933Y105 7,928 -2,217 -21.85 721 -15.57 0.3303
2019-11-19 2019-09-30 13F MERCK COM 58933Y105 10,145 1,678 19.82 854 20.28 0.4804
2019-08-14 2019-06-30 13F MERCK COM 58933Y105 8,467 -22,910 -73.02 710 -72.80 0.3938
2019-05-15 2019-03-31 13F MERCK COM 58933Y105 31,377 -7,888 -20.09 2,610 -13.00 1.4986
2019-02-14 2018-12-31 13F MERCK COM 58933Y105 39,265 -2,440 -5.85 3,000 1.39 1.9962
2018-11-14 2018-09-30 13F MERCK COM 58933Y105 41,705 -596 -1.41 2,959 15.23 1.6973
2018-08-13 2018-06-30 13F MERCK COM 58933Y105 42,301 23 0.05 2,568 11.51 1.5811
2018-05-14 2018-03-31 13F MERCK COM 58933Y105 42,278 4,566 12.11 2,303 8.53 1.4379
2018-02-15 2017-12-31 13F MERCK COM 58933Y105 37,712 -4,337 -10.31 2,122 -21.17 1.3848
2017-11-14 2017-09-30 13F MERCK COM 58933Y105 42,049 -1,333 -3.07 2,692 -3.17 1.7429
2017-08-14 2017-06-30 13F MERCK COM 58933Y105 43,382 1,650 3.95 2,780 4.83 1.9557
2017-05-12 2017-03-31 13F MERCK COM 58933Y105 41,732 1,068 2.63 2,652 10.78 1.9693
2017-02-09 2016-12-31 13F MERCK COM 58933Y105 40,664 40,664 2,394 2.0109
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.