Merck & Co., Inc.
DE ˙ XTRA ˙ US58933Y1055
102,78 € ↑2,84 (2,84%)
2026-06-04
DEL PRIS
SecurityDE:6MK / Merck & Co., Inc.
InstitutionD.B. Root & Company, LLC
Latest Disclosed Ownership3,577 shares
Latest Disclosed Value $ 430,239
D.B. Root & Company, LLC reports 5.83% increase in ownership of 6MK / Merck & Co., Inc.

On May 12, 2026 - D.B. Root & Company, LLC filed a 13F-HR form disclosing ownership of 3,577 shares of Merck & Co., Inc. (DE:6MK) valued at $372,723 USD as of March 31, 2026. The entity filed a previous 13F-HR on February 3, 2026 disclosing 3,380 shares of Merck & Co., Inc.. This represents a change in shares of 5.83% during the quarter. The current value of the position is $367,644 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)
2026-05-12 2026-03-31 13F MERCK COM 58933Y105 3,577 197 5.83 430 21.13 0.1028
2026-02-03 2025-12-31 13F MERCK COM 58933Y105 3,380 339 11.15 356 39.22 0.0868
2025-11-06 2025-09-30 13F MERCK COM 58933Y105 3,041 224 7.95 255 14.35 0.0648
2025-07-22 2025-06-30 13F MERCK COM 58933Y105 2,817 372 15.21 223 1.83 0.0659
2025-05-14 2025-03-31 13F MERCK COM 58933Y105 2,445 -949 -27.96 219 -35.01 0.0709
2025-01-17 2024-12-31 13F MERCK COM 58933Y105 3,394 373 12.35 338 -1.75 0.1074
2024-10-31 2024-09-30 13F MERCK COM 58933Y105 3,021 30 1.00 343 -7.30 0.1131
2024-07-15 2024-06-30 13F MERCK COM 58933Y105 2,991 1,021 51.83 370 42.86 0.1263
2024-04-17 2024-03-31 13F MERCK COM 58933Y105 1,970 1,970 260 0.0879
2023-11-03 2023-09-30 13F MERCK COM 58933Y105 0 -2,049 -100.00 0 -100.00
2023-07-18 2023-06-30 13F MERCK COM 58933Y105 2,049 -537 -20.77 236 -14.18 0.0894
2023-04-18 2023-03-31 13F MERCK COM 58933Y105 2,586 48 1.89 275 -2.14 0.1082
2023-01-27 2022-12-31 13F MERCK COM 58933Y105 2,538 0 0.00 282 28.90 0.1190
2022-10-26 2022-09-30 13F Merck COM 58933Y105 2,538 -64 -2.46 218 -8.02 0.0993
2022-07-21 2022-06-30 13F Merck COM 58933Y105 2,602 -371 -12.48 237 -2.47 0.1016
2022-05-06 2022-03-31 13F Merck COM 58933Y105 2,973 -95 -3.10 243 3.40 0.0905
2022-02-01 2021-12-31 13F Merck COM 58933Y105 3,068 -460 -13.04 235 -10.98 0.0847
2021-10-22 2021-09-30 13F Merck COM 58933Y105 3,528 46 1.32 264 -2.22 0.1030
2021-07-28 2021-06-30 13F Merck COM 58933Y105 3,482 -159 -4.37 270 -3.57 0.1008
2021-05-04 2021-03-31 13F Merck COM 58933Y105 3,641 -384 -9.54 280 -14.89 0.1101
2021-02-09 2020-12-31 13F Merck COM 58933Y105 4,025 274 7.30 329 5.79 0.1314
2020-10-22 2020-09-30 13F Merck COM 58933Y105 3,751 -87 -2.27 311 5.07 0.1248
2020-08-06 2020-06-30 13F Merck COM 58933Y105 3,838 -1,210 -23.97 296 -23.71 0.1285
2020-04-29 2020-03-31 13F Merck COM 58933Y105 5,048 -2,604 -34.03 388 -44.17 0.1958
2020-01-14 2019-12-31 13F Merck COM 58933Y105 7,652 174 2.33 695 10.49 0.3061
2019-10-28 2019-09-30 13F Merck COM 58933Y105 7,478 -3,400 -31.26 629 -31.03 0.2930
2019-07-19 2019-06-30 13F Merck COM 58933Y105 10,878 -774 -6.64 912 -5.88 0.4041
2019-04-12 2019-03-31 13F Merck Stock 58933Y105 11,652 -178 -1.50 969 7.19 0.4136
2019-01-25 2018-12-31 13F/A-1 Merck Stock 58933Y105 11,830 -206 -1.71 904 5.85 0.4497
2019-01-24 2018-12-31 13F Merck Stock 58933Y105 12,036 0 854 0.3762
2018-11-05 2018-09-30 13F Merck Stock 58933Y105 12,036 -90 -0.74 854 16.03 0.3762
2018-07-25 2018-06-30 13F Merck Stock 58933Y105 12,126 91 0.76 736 12.20 0.3473
2018-05-02 2018-03-31 13F Merck Stock 58933Y105 12,035 8,199 213.74 656 203.70 0.3464
2018-02-22 2017-12-31 13F MERCK COM 58933Y105 3,836 3,836 216 0.1850
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.