Merck & Co., Inc.
MX ˙ BMV ˙ US58933Y1055
SecurityMX:MRK / Merck & Co., Inc.
InstitutionConnecticut Wealth Management, LLC
Latest Disclosed Ownership9,776 shares
Latest Disclosed Value $ 1,175,955
Connecticut Wealth Management, LLC reports 6.10% increase in ownership of MRK / Merck & Co., Inc.

On May 1, 2026 - Connecticut Wealth Management, LLC filed a 13F-HR form disclosing ownership of 9,776 shares of Merck & Co., Inc. (MX:MRK) valued at $1,175,955 USD as of March 31, 2026. The entity filed a previous 13F-HR on February 12, 2026 disclosing 9,214 shares of Merck & Co., Inc.. This represents a change in shares of 6.10% 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)
2026-05-01 2026-03-31 13F MERCK COM 58933Y105 9,776 562 6.10 1,176 21.26 0.0493
2026-02-12 2025-12-31 13F MERCK COM 58933Y105 9,214 115 1.26 970 27.00 0.0422
2025-11-13 2025-09-30 13F MERCK COM 58933Y105 9,099 -403 -4.24 764 1.46 0.0339
2025-08-14 2025-06-30 13F MERCK COM 58933Y105 9,502 -2,011 -17.47 752 -27.20 0.0358
2025-05-15 2025-03-31 13F MERCK COM 58933Y105 11,513 -1,116 -8.84 1,033 -17.75 0.0541
2025-02-18 2024-12-31 13F MERCK COM 58933Y105 12,629 -2,825 -18.28 1,256 -28.39 0.0617
2024-11-13 2024-09-30 13F MERCK COM 58933Y105 15,454 -1,736 -10.10 1,755 -17.58 0.0850
2024-08-13 2024-06-30 13F MERCK COM 58933Y105 17,190 -886 -4.90 2,128 -10.78 0.1098
2024-05-01 2024-03-31 13F MERCK COM 58933Y105 18,076 147 0.82 2,385 22.06 0.1269
2024-02-06 2023-12-31 13F MERCK COM 58933Y105 17,929 8,267 85.56 1,955 96.58 0.1123
2023-10-19 2023-09-30 13F MERCK COM 58933Y105 9,662 3,196 49.43 995 33.24 0.0679
2023-07-25 2023-06-30 13F MERCK COM 58933Y105 6,466 2,665 70.11 746 84.65 0.0519
2023-04-18 2023-03-31 13F MERCK COM 58933Y105 3,801 427 12.66 404 8.02 0.0306
2023-01-17 2022-12-31 13F MERCK COM 58933Y105 3,374 -192 -5.38 374 21.82 0.0317
2022-11-02 2022-09-30 13F MERCK COM 58933Y105 3,566 -4,048 -53.17 307 -55.76 0.0286
2022-07-12 2022-06-30 13F MERCK COM 58933Y105 7,614 367 5.06 694 16.64 0.0607
2022-04-18 2022-03-31 13F MERCK COM 58933Y105 7,247 262 3.75 595 11.21 0.0455
2022-01-24 2021-12-31 13F MERCK COM 58933Y105 6,985 -864 -11.01 535 -9.32 0.0415
2021-11-02 2021-09-30 13F MERCK COM 58933Y105 7,849 1,365 21.05 590 17.06 0.0514
2021-07-29 2021-06-30 13F MERCK COM 58933Y105 6,484 -4,119 -38.85 504 -38.31 0.0444
2021-05-12 2021-03-31 13F/A-1 MERCK & CO. COM 58933Y105 10,603 52 0.49 817 -5.33 0.0745
2021-01-29 2020-12-31 13F MERCK & CO. COM 58933Y105 10,551 -1,081 -9.29 863 -10.57 0.0916
2020-10-13 2020-09-30 13F MERCK & CO. COM 58933Y105 11,632 4,044 53.29 965 64.40 0.1065
2020-07-14 2020-06-30 13F MERCK & CO. COM 58933Y105 7,588 3,566 88.66 587 89.97 0.0729
2020-04-20 2020-03-31 13F MERCK & CO. COM 58933Y105 4,022 6 0.15 309 -15.34 0.0462
2020-01-29 2019-12-31 13F MERCK COM 58933Y105 4,016 -403 -9.12 365 -1.88 0.0402
2019-10-24 2019-09-30 13F MERCK COM 58933Y105 4,419 978 28.42 372 28.72 0.0459
2019-07-29 2019-06-30 13F MERCK COM 58933Y105 3,441 3,441 289 0.0357
2018-02-14 2017-12-31 13F MERCK COM 58933Y105 0 -3,647 -100.00 0 -100.00
2017-11-08 2017-09-30 13F MERCK COM 58933Y105 3,647 -128 -3.39 235 -0.84 0.1381
2017-08-01 2017-06-30 13F MERCK COM 58933Y105 3,775 138 3.79 237 2.60 0.1441
2017-05-04 2017-03-31 13F MERCK& COM 58933Y105 3,637 0 0.00 231 3.13 0.1405
2017-02-07 2016-12-31 13F MERCK COM 58933Y105 3,637 0 0.00 224 -1.32 0.1427
2016-11-14 2016-09-30 13F MERCK COM 58933Y105 3,637 3,637 227 0.1631
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.