Merck & Co., Inc.
MX ˙ BMV ˙ US58933Y1055
SecurityMX:MRK / Merck & Co., Inc.
InstitutionZhang Financial LLC
Latest Disclosed Ownership23,249 shares
Latest Disclosed Value $ 2,796,586
Zhang Financial LLC reports 2.01% increase in ownership of MRK / Merck & Co., Inc.

On May 6, 2026 - Zhang Financial LLC filed a 13F-HR form disclosing ownership of 23,249 shares of Merck & Co., Inc. (MX:MRK) valued at $2,796,586 USD as of March 31, 2026. The entity filed a previous 13F-HR on February 10, 2026 disclosing 22,792 shares of Merck & Co., Inc.. This represents a change in shares of 2.01% 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)
2026-05-06 2026-03-31 13F MERCK COM 58933Y105 23,249 457 2.01 2,797 16.55 0.0967
2026-02-10 2025-12-31 13F MERCK COM 58933Y105 22,792 157 0.69 2,399 26.33 0.0895
2025-11-10 2025-09-30 13F MERCK COM 58933Y105 22,635 131 0.58 1,900 6.63 0.0772
2025-08-01 2025-06-30 13F MERCK COM 58933Y105 22,504 -683 -2.95 1,781 -14.42 0.0822
2025-04-15 2025-03-31 13F MERCK COM 58933Y105 23,187 702 3.12 2,081 -6.93 0.1101
2025-01-16 2024-12-31 13F MERCK COM 58933Y105 22,485 4,116 22.41 2,237 7.24 0.1281
2024-10-15 2024-09-30 13F MERCK COM 58933Y105 18,369 -337 -1.80 2,086 -9.94 0.1317
2024-07-19 2024-06-30 13F MERCK COM 58933Y105 18,706 408 2.23 2,316 -4.10 0.1620
2024-04-24 2024-03-31 13F MERCK COM 58933Y105 18,298 706 4.01 2,414 25.93 0.1789
2024-01-31 2023-12-31 13F MERCK COM 58933Y105 17,592 282 1.63 1,918 7.46 0.1647
2023-10-11 2023-09-30 13F MERCK COM 58933Y105 17,310 -40 -0.23 1,785 -9.72 0.1809
2023-07-18 2023-06-30 13F MERCK COM 58933Y105 17,350 2,656 18.08 1,977 26.42 0.2029
2023-05-11 2023-03-31 13F MERCK COM 58933Y105 14,694 131 0.90 1,563 -3.22 0.1785
2023-05-17 2022-12-31 13F/A-1 MERCK COM 58933Y105 14,563 -1,461 -9.12 1,616 17.03 0.2060
2023-01-17 2022-12-31 13F MERCK COM 58933Y105 14,563 -1,461 2 0.0002
2022-10-18 2022-09-30 13F MERCK COM 58933Y105 16,024 1,012 6.74 1,380 0.80 0.2080
2022-07-14 2022-06-30 13F MERCK COM 58933Y105 15,012 2,058 15.89 1,369 28.79 0.2197
2022-04-21 2022-03-31 13F MERCK COM 58933Y105 12,954 823 6.78 1,063 14.30 0.1795
2022-02-10 2021-12-31 13F MERCK COM 58933Y105 12,131 5,042 71.12 930 74.81 0.1648
2021-10-20 2021-09-30 13F MERCK COM 58933Y105 7,089 3,001 73.41 532 67.30 0.1230
2021-07-26 2021-06-30 13F MERCK COM 58933Y105 4,088 -48 -1.16 318 -0.31 0.0780
2021-04-21 2021-03-31 13F MERCK COM 58933Y105 4,136 549 15.31 319 8.87 0.0856
2021-01-20 2020-12-31 13F MERCK COM 58933Y105 3,587 -395 -9.92 293 -11.21 0.0903
2020-10-13 2020-09-30 13F MERCK COM 58933Y105 3,982 353 9.73 330 17.44 0.1189
2020-07-23 2020-06-30 13F MERCK COM 58933Y105 3,629 0 0.00 281 0.72 0.1083
2020-05-06 2020-03-31 13F MERCK COM 58933Y105 3,629 -234 -6.06 279 -20.51 0.1235
2020-01-21 2019-12-31 13F MERCK COM 58933Y105 3,863 533 16.01 351 25.36 0.1338
2019-10-17 2019-09-30 13F MERCK COM 58933Y105 3,330 -173 -4.94 280 -4.76 0.1183
2019-07-24 2019-06-30 13F MERCK COM 58933Y105 3,503 -1,184 -25.26 294 -24.62 0.1230
2019-05-14 2019-03-31 13F MERCK COM 58933Y105 4,687 493 11.75 390 21.88 0.1679
2019-05-16 2018-12-31 13F MERCK COM 58933Y105 4,194 995 31.10 320 39.74 0.1546
2019-05-24 2018-09-30 13F MERCK COM 58933Y105 3,199 3,199 229 0.1093
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.