Merck & Co., Inc.
MX ˙ BMV ˙ US58933Y1055
SecurityMX:MRK / Merck & Co., Inc.
InstitutionWsfs Capital Management, Llc
Latest Disclosed Ownership222,405 shares
Latest Disclosed Value $ 26,753,083
Wsfs Capital Management, Llc reports 3.54% decrease in ownership of MRK / Merck & Co., Inc.

On May 4, 2026 - Wsfs Capital Management, Llc filed a 13F-HR form disclosing ownership of 222,405 shares of Merck & Co., Inc. (MX:MRK) valued at $26,753,083 USD as of March 31, 2026. The entity filed a previous 13F-HR on February 4, 2026 disclosing 230,574 shares of Merck & Co., Inc.. This represents a change in shares of -3.54% 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)
2026-05-04 2026-03-31 13F MERCK COM 58933Y105 222,405 -8,169 -3.54 26,753 10.23 1.2982
2026-02-04 2025-12-31 13F MERCK COM 58933Y105 230,574 -12,118 -4.99 24,270 19.15 1.1673
2025-11-04 2025-09-30 13F MERCK COM 58933Y105 242,692 2,613 1.09 20,369 7.18 1.0108
2025-08-06 2025-06-30 13F MERCK COM 58933Y105 240,079 -2,982 -1.23 19,005 -12.89 1.0403
2025-05-02 2025-03-31 13F MERCK COM 58933Y105 243,061 523 0.22 21,817 -9.57 1.3088
2025-02-05 2024-12-31 13F/A-1 MERCK COM 58933Y105 242,538 -7,319 -2.93 24,128 -14.96 1.3006
2025-02-03 2024-12-31 13F MERCK COM 58933Y105 39,189 -210,668 24,128 1.3006
2024-10-25 2024-09-30 13F MERCK COM 58933Y105 249,857 -2,504 -0.99 28,374 -9.23 1.5313
2024-07-30 2024-06-30 13F MERCK COM 58933Y105 252,361 5,549 2.25 31,258 -4.02 1.7230
2024-05-02 2024-03-31 13F MERCK COM 58933Y105 246,812 6,109 2.54 32,567 24.10 1.8494
2024-02-02 2023-12-31 13F MERCK COM 58933Y105 240,703 13,339 5.87 26,241 12.11 1.6366
2023-11-08 2023-09-30 13F MERCK COM 58933Y105 227,364 55,460 32.26 23,407 18.01 1.5315
2023-08-11 2023-06-30 13F MERCK COM 58933Y105 171,904 -671 -0.39 19,836 8.03 1.8639
2023-05-02 2023-03-31 13F MERCK COM 58933Y105 172,575 -33,403 -16.22 18,360 -19.66 1.9141
2023-02-10 2022-12-31 13F MERCK COM 58933Y105 205,978 188,073 1,050.39 22,853 1,382.04 2.4688
2022-11-04 2022-09-30 13F MERCK COM 58933Y105 17,905 -466 -2.54 1,542 -7.94 0.5466
2022-08-10 2022-06-30 13F MERCK COM 58933Y105 18,371 46 0.25 1,675 11.37 0.5510
2022-05-13 2022-03-31 13F MERCK COM 58933Y105 18,325 440 2.46 1,504 9.70 0.4197
2022-02-10 2021-12-31 13F MERCK COM 58933Y105 17,885 -2,905 -13.97 1,371 -12.23 0.5204
2021-11-12 2021-09-30 13F MERCK COM 58933Y105 20,790 37 0.18 1,562 -3.22 0.7083
2021-08-10 2021-06-30 13F MERCK COM 58933Y105 20,753 53 0.26 1,614 1.13 0.7306
2021-05-11 2021-03-31 13F MERCK & CO. COM 58933Y105 20,700 35 0.17 1,596 -5.56 0.7824
2021-02-02 2020-12-31 13F MERCK & CO. COM 58933Y105 20,665 -463 -2.19 1,690 -3.59 0.8351
2020-11-09 2020-09-30 13F MERCK & CO. COM 58933Y105 21,128 -778 -3.55 1,753 3.48 1.0184
2020-08-07 2020-06-30 13F MERCK & CO. COM 58933Y105 21,906 353 1.64 1,694 2.17 1.0698
2020-05-01 2020-03-31 13F MERCK & CO. COM 58933Y105 21,553 32 0.15 1,658 -15.28 1.1274
2020-01-31 2019-12-31 13F MERCK COM 58933Y105 21,521 -418 -1.91 1,957 5.96 1.4196
2019-11-08 2019-09-30 13F MERCK COM 58933Y105 21,939 433 2.01 1,847 2.44 1.5404
2019-08-14 2019-06-30 13F MERCK COM 58933Y105 21,506 6,190 40.42 1,803 41.52 1.5297
2019-05-15 2019-03-31 13F MERCK COM 58933Y105 15,316 -753 -4.69 1,274 3.75 1.1491
2019-02-12 2018-12-31 13F MERCK COM 58933Y105 16,069 -220 -1.35 1,228 6.23 1.1186
2018-11-07 2018-09-30 13F MERCK COM 58933Y105 16,289 -632 -3.74 1,156 12.56 0.9704
2018-08-10 2018-06-30 13F MERCK COM 58933Y105 16,921 -14 -0.08 1,027 11.39 0.9004
2018-05-11 2018-03-31 13F MERCK COM 58933Y105 16,935 -1,898 -10.08 922 -23.55 0.8374
2018-02-14 2017-12-31 13F MERCK COM 58933Y105 18,833 0 0.00 1,206 0.00 1.5821
2017-11-14 2017-09-30 13F MERCK COM 58933Y105 18,833 -183 -0.96 1,206 -1.07 1.2551
2017-08-11 2017-06-30 13F MERCK COM 58933Y105 19,016 459 2.47 1,219 3.39 1.3751
2017-05-12 2017-03-31 13F MERCK COM 58933Y105 18,557 547 3.04 1,179 11.23 1.2125
2017-03-29 2016-12-31 13F MERCK COM 58933Y105 18,010 18,010 1,060 1.0803
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.