Merck & Co., Inc.
MX ˙ BMV ˙ US58933Y1055
SecurityMX:MRK / Merck & Co., Inc.
InstitutionMitchell Sinkler & Starr/pa
Latest Disclosed Ownership42,297 shares
Latest Disclosed Value $ 5,087,906
Mitchell Sinkler & Starr/pa ownership in MRK / Merck & Co., Inc.

On April 13, 2026 - Mitchell Sinkler & Starr/pa filed a 13F-HR form disclosing ownership of 42,297 shares of Merck & Co., Inc. (MX:MRK) valued at $5,087,906 USD as of March 31, 2026. The entity filed a previous 13F-HR on February 11, 2026 disclosing 42,297 shares of Merck & Co., Inc.. This represents a change in shares of 0.00% 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)
2026-04-13 2026-03-31 13F MERCK COM 58933Y105 42,297 0 0.00 5,088 14.26 2.3487
2026-02-11 2025-12-31 13F MERCK COM 58933Y105 42,297 -2,480 -5.54 4,452 18.47 2.0114
2025-11-04 2025-09-30 13F MERCK COM 58933Y105 44,777 -31 -0.07 3,758 5.95 1.6896
2025-07-25 2025-06-30 13F MERCK COM 58933Y105 44,808 -55,625 -55.39 3,547 -60.65 1.6976
2025-05-07 2025-03-31 13F MERCK COM 58933Y105 100,433 12,891 14.73 9,015 3.51 2.5235
2025-02-12 2024-12-31 13F MERCK COM 58933Y105 87,542 -23,268 -21.00 8,709 -22.83 2.3234
2024-11-13 2024-09-30 13F MERCK COM 58933Y105 110,810 8,521 8.33 11,285 -11.16 2.8370
2024-08-07 2024-06-30 13F MERCK COM 58933Y105 102,289 -5,217 -4.85 12,701 -10.46 3.2602
2024-04-30 2024-03-31 13F MERCK COM 58933Y105 107,506 -100,701 -48.37 14,185 -37.51 3.5478
2024-02-12 2023-12-31 13F MERCK COM 58933Y105 208,207 65,389 45.78 22,699 54.38 4.1295
2023-11-01 2023-09-30 13F MERCK COM 58933Y105 142,818 38,369 36.73 14,703 22.00 4.5221
2023-07-18 2023-06-30 13F MERCK COM 58933Y105 104,449 -200 -0.19 12,052 8.25 3.4217
2023-05-15 2023-03-31 13F MERCK COM 58933Y105 104,649 14,217 15.72 11,134 10.96 3.2917
2023-02-14 2022-12-31 13F MERCK COM 58933Y105 90,432 8,124 9.87 10,033 41.55 3.2298
2022-10-25 2022-09-30 13F MERCK COM 58933Y105 82,308 1,557 1.93 7,088 -3.72 2.7484
2022-07-21 2022-06-30 13F MERCK COM 58933Y105 80,751 750 0.94 7,362 12.16 2.7032
2022-04-19 2022-03-31 13F MERCK COM 58933Y105 80,001 -6,940 -7.98 6,564 -1.49 2.0552
2022-02-01 2021-12-31 13F MERCK COM 58933Y105 86,941 64,896 294.38 6,663 302.36 1.9780
2021-10-12 2021-09-30 13F MERCK COM 58933Y105 22,045 -370 -1.65 1,656 -4.99 1.4972
2021-07-15 2021-06-30 13F MERCK COM 58933Y105 22,415 -400 -1.75 1,743 -0.91 1.5853
2021-04-12 2021-03-31 13F MERCK & CO. COM 58933Y105 22,815 600 2.70 1,759 -3.19 1.7050
2021-02-09 2020-12-31 13F MERCK & CO. COM 58933Y105 22,215 -2,440 -9.90 1,817 -11.15 1.7343
2020-10-07 2020-09-30 13F MERCK & CO. COM 58933Y105 24,655 0 0.00 2,045 7.24 2.0783
2020-07-20 2020-06-30 13F MERCK & CO. COM 58933Y105 24,655 0 0.00 1,907 0.53 2.1638
2020-04-07 2020-03-31 13F MERCK & CO. COM 58933Y105 24,655 0 0.00 1,897 -15.39 2.4808
2020-01-09 2019-12-31 13F MERCK COM 58933Y105 24,655 -2,110 -7.88 2,242 -0.49 2.3818
2019-11-06 2019-09-30 13F MERCK COM 58933Y105 26,765 -1,767 -6.19 2,253 -5.81 2.8852
2019-07-17 2019-06-30 13F MERCK COM 58933Y105 28,532 -175 -0.61 2,392 0.17 2.7342
2019-04-08 2019-03-31 13F MERCK COM 58933Y105 28,707 -1,630 -5.37 2,388 3.02 2.7576
2019-01-24 2018-12-31 13F MERCK COM 58933Y105 30,337 -3,305 -9.82 2,318 -2.89 2.8608
2018-10-04 2018-09-30 13F MERCK COM 58933Y105 33,642 -920 -2.66 2,387 13.78 2.4970
2018-07-11 2018-06-30 13F MERCK COM 58933Y105 34,562 -575 -1.64 2,098 9.61 2.3124
2018-04-13 2018-03-31 13F MERCK COM 58933Y105 35,137 14,645 71.47 1,914 66.00 2.1840
2018-01-11 2017-12-31 13F MERCK COM 58933Y105 20,492 0 0.00 1,153 -12.12 1.7072
2017-10-23 2017-09-30 13F MERCK COM 58933Y105 20,492 300 1.49 1,312 1.39 2.0562
2017-07-19 2017-06-30 13F MERCK COM 58933Y105 20,192 -1,345 -6.25 1,294 -5.41 2.1198
2017-04-19 2017-03-31 13F MERCK COM 58933Y105 21,537 -4,000 -15.66 1,368 -8.98 2.2219
2017-01-11 2016-12-31 13F MERCK COM 58933Y105 25,537 -800 -3.04 1,503 -8.58 2.1076
2016-10-11 2016-09-30 13F MERCK COM 58933Y105 26,337 0 0.00 1,644 8.37 2.5760
2016-07-12 2016-06-30 13F MERCK COMMON STOCK 58933Y105 26,337 -600 -2.23 1,517 6.46 2.0684
2016-04-15 2016-03-31 13F MERCK COMMON STOCK 58933Y105 26,937 0 0.00 1,425 0.14 1.9652
2016-01-11 2015-12-31 13F MERCK COMMON STOCK 58933Y105 26,937 -4,000 -12.93 1,423 -6.87 1.9422
2015-10-13 2015-09-30 13F MERCK COMMON STOCK 58933Y105 30,937 0 0.00 1,528 -13.23 1.9674
2015-07-17 2015-06-30 13F MERCK COMMON STOCK 58933Y105 30,937 175 0.57 1,761 -0.40 2.0805
2015-04-14 2015-03-31 13F MERCK COMMON STOCK 58933Y105 30,762 30,762 0.00 1,768 1.9890
2015-02-03 2014-12-31 13F MERCK COMMON STOCK 58933Y105 0 -30,762 -100.00 0 -100.00
2014-10-17 2014-09-30 13F MERCK COMMON STOCK 58933Y105 30,762 275 0.90 1,824 3.40 2.0376
2014-07-14 2014-06-30 13F MERCK COMMON STOCK 58933Y105 30,487 0 0.00 1,764 1.91 1.8955
2014-04-09 2014-03-31 13F MERCK COMMON STOCK 58933Y105 30,487 -350 -1.14 1,731 12.18 1.9370
2014-01-23 2013-12-31 13F MERCK COMMON STOCK 58933Y105 30,837 -2,650 -7.91 1,543 -3.20 1.7342
2013-10-22 2013-09-30 13F MERCK COMMON STOCK 58933Y105 33,487 -465,076 -93.28 1,594 -93.12 1.8254
2013-07-24 2013-06-30 13F MERCK COMMON STOCK 58933Y105 498,563 498,563 23,158 5.0782
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.