Merck & Co., Inc.
US ˙ NYSE ˙ US58933Y1055

SecurityMRK / Merck & Co., Inc.
InstitutionWetherby Asset Management Inc
Latest Disclosed Ownership81,536 shares
Latest Disclosed Value $ 6,843,308
Wetherby Asset Management Inc reports 1.78% decrease in ownership of MRK / Merck & Co., Inc.

On November 14, 2025 - Wetherby Asset Management Inc filed a 13F-HR form disclosing ownership of 81,536 shares of Merck & Co., Inc. (US:MRK) valued at $6,843,316 USD as of September 30, 2025. The entity filed a previous 13F-HR on August 14, 2025 disclosing 83,012 shares of Merck & Co., Inc.. This represents a change in shares of -1.78% during the quarter. The current value of the position is $9,848,733 USD.

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)
2025-11-14 2025-09-30 13F MERCK COM 58933Y105 81,536 -1,476 -1.78 6,843 4.14 0.2794
2025-08-14 2025-06-30 13F MERCK COM 58933Y105 83,012 -40,146 -32.60 6,571 -46.37 0.2925
2025-02-14 2024-12-31 13F MERCK COM 58933Y105 123,158 -440 -0.36 12,252 -12.70 0.5874
2024-11-14 2024-09-30 13F MERCK COM 58933Y105 123,598 -3,088 -2.44 14,036 -10.51 0.6418
2024-08-14 2024-06-30 13F MERCK COM 58933Y105 126,686 6,883 5.75 15,684 -0.78 0.7394
2024-05-15 2024-03-31 13F MERCK COM 58933Y105 119,803 -4,547 -3.66 15,808 16.61 0.7533
2024-02-14 2023-12-31 13F MERCK COM 58933Y105 124,350 933 0.76 13,557 6.70 0.7062
2023-11-14 2023-09-30 13F MERCK COM 58933Y105 123,417 -730 -0.59 12,706 -11.31 0.7204
2023-08-14 2023-06-30 13F MERCK COM 58933Y105 124,147 -234 -0.19 14,325 8.26 0.7714
2023-05-12 2023-03-31 13F MERCK COM 58933Y105 124,381 3,294 2.72 13,233 -1.50 0.7744
2023-02-14 2022-12-31 13F MERCK COM 58933Y105 121,087 1,924 1.61 13,435 30.90 0.8629
2022-11-14 2022-09-30 13F MERCK COM 58933Y105 119,163 2,683 2.30 10,263 -3.36 0.7236
2022-08-15 2022-06-30 13F MERCK COM 58933Y105 116,480 4,442 3.96 10,620 15.52 0.7249
2022-05-16 2022-03-31 13F MERCK COM 58933Y105 112,038 2,856 2.62 9,193 9.87 0.5268
2022-02-14 2021-12-31 13F MERCK COM 58933Y105 109,182 -51 -0.05 8,367 1.99 0.4698
2021-11-15 2021-09-30 13F MERCK COM 58933Y105 109,233 2,748 2.58 8,204 -0.94 0.5062
2021-08-16 2021-06-30 13F MERCK COM 58933Y105 106,485 1,552 1.48 8,282 2.37 0.5053
2021-05-14 2021-03-31 13F MERCK & CO. COM 58933Y105 104,933 -9,588 -8.37 8,090 -13.64 0.6166
2021-02-11 2020-12-31 13F MERCK & CO. COM 58933Y105 114,521 3,976 3.60 9,368 2.17 0.6353
2020-12-16 2020-09-30 13F/A-01 MERCK & CO. COM 58933Y105 110,545 3,604 3.37 9,169 10.87 0.8405
2020-11-13 2020-09-30 13F MERCK & CO. COM 58933Y105 117,975 11,034 9,786 622,475.5265
2020-08-14 2020-06-30 13F MERCK & CO. COM 58933Y105 106,941 8,791 8.96 8,270 9.51 0.7839
2020-05-06 2020-03-31 13F MERCK & CO. COM 58933Y105 98,150 38,740 65.21 7,552 39.75 0.8477
2020-01-28 2019-12-31 13F MERCK COM 58933Y105 59,410 -39,908 -40.18 5,404 -35.37 0.5323
2019-10-31 2019-09-30 13F MERCK COM 58933Y105 99,318 1,175 1.20 8,361 1.60 0.8729
2019-07-25 2019-06-30 13F MERCK COM 58933Y105 98,143 1,047 1.08 8,229 1.89 0.9008
2019-07-25 2019-03-31 13F/A-1 MERCK COM 58933Y105 97,096 1,423 1.49 8,076 10.48 1.0057
2019-05-09 2019-03-31 13F MERCK COM 58933Y105 97,096 1,423 8,076
2019-01-30 2018-12-31 13F MERCK COM 58933Y105 95,673 2,406 2.58 7,310 10.49 1.0340
2018-11-07 2018-09-30 13F MERCK COM 58933Y105 93,267 -978 -1.04 6,616 15.64 0.8172
2018-07-24 2018-06-30 13F MERCK COM 58933Y105 94,245 1,685 1.82 5,721 13.47 0.7745
2018-05-04 2018-03-31 13F MERCK COM 58933Y105 92,560 1,334 1.46 5,042 -1.77 0.6959
2018-02-09 2017-12-31 13F MERCK COM 58933Y105 91,226 -1,761 -1.89 5,133 -13.79 0.7122
2017-11-13 2017-09-30 13F MERCK COM 58933Y105 92,987 313 0.34 5,954 0.25 0.8856
2017-08-01 2017-06-30 13F MERCK COM 58933Y105 92,674 2,459 2.73 5,939 3.61 1.0104
2017-04-27 2017-03-31 13F MERCK COM 58933Y105 90,215 -257 -0.28 5,732 7.62 1.0308
2017-02-08 2016-12-31 13F MERCK COM 58933Y105 90,472 741 0.83 5,326 -4.91 1.0431
2016-11-14 2016-09-30 13F MERCK COM 58933Y105 89,731 484 0.54 5,601 8.93 1.1331
2016-08-10 2016-06-30 13F MERCK COM 58933Y105 89,247 1,274 1.45 5,142 10.49 1.1399
2016-05-10 2016-03-31 13F MERCK & CO INC COM 58933Y105 87,973 2,094 2.44 4,654 2.60 1.0968
2016-02-08 2015-12-31 13F MERCK & CO INC COM 58933Y105 85,879 -355 -0.41 4,536 6.50 1.0875
2015-11-12 2015-09-30 13F MERCK & CO INC COM 58933Y105 86,234 1,550 1.83 4,259 -11.66 1.0912
2015-08-12 2015-06-30 13F MERCK & CO INC COM 58933Y105 84,684 1,808 2.18 4,821 1.20 1.1590
2015-05-08 2015-03-31 13F MERCK & CO INC COM 58933Y105 82,876 299 0.36 4,764 1.58 1.1598
2015-02-12 2014-12-31 13F MERCK & CO INC COM 58933Y105 82,577 1,062 1.30 4,690 -2.96 1.1795
2014-11-03 2014-09-30 13F MERCK & CO INC COM 58933Y105 81,515 281 0.35 4,833 2.85 1.3474
2014-08-01 2014-06-30 13F MERCK & CO INC COM 58933Y105 81,234 635 0.79 4,699 2.69 1.3265
2014-05-05 2014-03-31 13F/A-1 MERCK & CO INC COM 58933Y105 80,599 -2,785 -3.34 4,576 9.66 1.3117
2014-04-30 2014-03-31 13F MERCK & CO INC COM 58933Y105 80,599 4,576
2014-01-29 2013-12-31 13F MERCK & CO INC COM 58933Y105 83,384 2,283 2.82 4,173 8.08 1.1901
2013-10-29 2013-09-30 13F MERCK & CO INC COM 58933Y105 81,101 2,134 2.70 3,861 5.26 1.2046
2013-07-24 2013-06-30 13F MERCK & CO INC COM 58933Y105 78,967 78,967 3,668 1.2784
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.