Merck & Co., Inc.
MX ˙ BMV ˙ US58933Y1055
SecurityMX:MRK / Merck & Co., Inc.
InstitutionSt Germain D J Co Inc
Latest Disclosed Ownership39,031 shares
Latest Disclosed Value $ 4,695,039
St Germain D J Co Inc reports 1.00% increase in ownership of MRK / Merck & Co., Inc.

On April 13, 2026 - St Germain D J Co Inc filed a 13F-HR form disclosing ownership of 39,031 shares of Merck & Co., Inc. (MX:MRK) valued at $4,695,039 USD as of March 31, 2026. The entity filed a previous 13F-HR on January 29, 2026 disclosing 38,645 shares of Merck & Co., Inc.. This represents a change in shares of 1.00% 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 & CO INC COM Stock 58933Y105 39,031 386 1.00 4,695 15.44 0.1858
2026-01-29 2025-12-31 13F MERCK & CO INC COM Stock 58933Y105 38,645 99 0.26 4,068 25.72 0.1580
2025-10-07 2025-09-30 13F MERCK & CO INC COM Stock 58933Y105 38,546 -1,325 -3.32 3,235 2.50 0.1294
2025-07-16 2025-06-30 13F MERCK & CO INC COM Stock 58933Y105 39,871 5,756 16.87 3,156 3.07 0.1361
2025-04-09 2025-03-31 13F MERCK & CO INC COM Stock 58933Y105 34,115 -4,766 -12.26 3,062 -20.82 0.1439
2025-01-10 2024-12-31 13F MERCK & CO INC COM Stock 58933Y105 38,881 -56 -0.14 3,868 -12.53 0.1758
2024-10-18 2024-09-30 13F MERCK & CO INC COM Stock 58933Y105 38,937 4,536 13.19 4,422 3.83 0.2032
2024-07-08 2024-06-30 13F MERCK & CO INC COM Stock 58933Y105 34,401 -653 -1.86 4,259 -7.94 0.2061
2024-04-02 2024-03-31 13F MERCK & CO INC COM Stock 58933Y105 35,054 301 0.87 4,625 22.10 0.2260
2024-01-02 2023-12-31 13F MERCK & CO INC COM Stock 58933Y105 34,753 -1,066 -2.98 3,789 2.74 0.1974
2023-10-23 2023-09-30 13F MERCK & CO INC COM Stock 58933Y105 35,819 -175 -0.49 3,688 -11.22 0.2072
2023-09-07 2023-06-30 13F MERCK & CO INC COM Stock 58933Y105 35,994 -16,522 -31.46 4,153 159.24 0.2193
2023-02-27 2022-12-31 13F MERCK & CO INC COM Stock 58933Y105 52,516 14,912 39.66 1,602 -53.27 0.5385
2022-11-21 2022-09-30 13F Merck COM 58933Y105 37,604 0 0.00 3,428 0.00 0.2264
2022-08-15 2022-06-30 13F/A-1 Merck COM 58933Y105 37,604 353 0.95 3,428 12.17 0.2264
2022-08-12 2022-06-30 13F Merck COM 58933Y105 37,251 0 3,056 0.1719
2022-05-12 2022-03-31 13F Merck COM 58933Y105 37,251 -188 -0.50 3,056 6.52 0.1719
2022-02-11 2021-12-31 13F Merck COM 58933Y105 37,439 -70 -0.19 2,869 1.85 0.1577
2021-11-03 2021-09-30 13F Merck COM 58933Y105 37,509 -863 -2.25 2,817 -5.60 0.1735
2021-07-28 2021-06-30 13F Merck COM 58933Y105 38,372 -2,410 -5.91 2,984 -5.09 0.1872
2021-05-13 2021-03-31 13F Merck COM 58933Y105 40,782 3,089 8.20 3,144 1.98 0.2125
2021-02-04 2020-12-31 13F Merck COM 58933Y105 37,693 2,450 6.95 3,083 5.47 0.2201
2020-11-10 2020-09-30 13F Merck COM 58933Y105 35,243 -297 -0.84 2,923 6.37 0.2372
2020-08-13 2020-06-30 13F Merck COM 58933Y105 35,540 -244 -0.68 2,748 -0.18 0.2406
2020-05-13 2020-03-31 13F Merck COM 58933Y105 35,784 788 2.25 2,753 -13.51 0.2706
2020-02-14 2019-12-31 13F Merck COM 58933Y105 34,996 15,840 82.69 3,183 97.33 0.2672
2019-10-17 2019-09-30 13F Merck COM 58933Y105 19,156 -348 -1.78 1,613 -1.35 0.1735
2019-07-24 2019-06-30 13F Merck COM 58933Y105 19,504 0 0.00 1,635 0.80 0.1782
2019-05-02 2019-03-31 13F Merck COM 58933Y105 19,504 -257 -1.30 1,622 7.42 0.1767
2019-02-05 2018-12-31 13F Merck COM 58933Y105 19,761 1,442 7.87 1,510 16.15 0.1792
2018-10-23 2018-09-30 13F Merck COM 58933Y105 18,319 2,517 15.93 1,300 35.56 0.1455
2018-08-07 2018-06-30 13F Merck COM 58933Y105 15,802 -70 -0.44 959 10.87 0.1141
2018-04-20 2018-03-31 13F Merck COM 58933Y105 15,872 9,558 151.38 865 143.66 0.1092
2018-02-13 2017-12-31 13F Merck COM 58933Y105 6,314 99 1.59 355 -10.80 0.0424
2017-10-31 2017-09-30 13F Merck COM 58933Y105 6,215 65 1.06 398 1.02 0.0499
2017-07-28 2017-06-30 13F Merck COM 58933Y105 6,150 1,518 32.77 394 34.01 0.0527
2017-04-25 2017-03-31 13F Merck COM 58933Y105 4,632 -1,170 -20.17 294 -14.04 0.0409
2017-02-02 2016-12-31 13F Merck COM 58933Y105 5,802 1,393 31.59 342 24.36 0.0463
2016-10-27 2016-09-30 13F Merck COM 58933Y105 4,409 -1,021 -18.80 275 -12.14 0.0384
2016-08-22 2016-06-30 13F Merck COM 58933Y105 5,430 0 0.00 313 9.06 0.0437
2016-04-21 2016-03-31 13F Merck COM 58933Y105 5,430 190 3.63 287 3.61 0.0410
2016-01-19 2015-12-31 13F Merck COM 58933Y105 5,240 383 7.89 277 15.42 0.0417
2015-10-23 2015-09-30 13F Merck COM 58933Y105 4,857 518 11.94 240 -2.83 0.0402
2015-07-23 2015-06-30 13F Merck COM 58933Y105 4,339 365 9.18 247 8.33 0.0373
2015-04-15 2015-03-31 13F Merck COM 58933Y105 3,974 70 1.79 228 2.70 0.0330
2015-01-22 2014-12-31 13F Merck COM 58933Y105 3,904 94 2.47 222 -1.77 0.0323
2014-10-10 2014-09-30 13F Merck COM 58933Y105 3,810 0 0.00 226 2.73 0.0341
2014-07-17 2014-06-30 13F Merck COM 58933Y105 3,810 -195 -4.87 220 -3.08 0.0323
2014-04-10 2014-03-31 13F Merck COM 58933Y105 4,005 0 0.00 227 13.50 0.0347
2014-01-21 2013-12-31 13F Merck COM 58933Y105 4,005 4,005 200 0.0293
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.