Merck & Co., Inc.
MX ˙ BMV ˙ US58933Y1055
SecurityMX:MRK / Merck & Co., Inc.
InstitutionRock Point Advisors, LLC
Latest Disclosed Ownership1,951 shares
Latest Disclosed Value $ 234,686
Rock Point Advisors, LLC ownership in MRK / Merck & Co., Inc.

On May 14, 2026 - Rock Point Advisors, LLC filed a 13F-HR form disclosing ownership of 1,951 shares of Merck & Co., Inc. (MX:MRK) valued at $234,686 USD as of March 31, 2026. The entity filed a previous 13F-HR on February 13, 2025 disclosing 0 shares of Merck & Co., Inc..

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)
2026-05-14 2026-03-31 13F Merck COM 58933Y105 1,951 1,951 235 0.0635
2025-02-13 2024-12-31 13F Merck COM 58933Y105 0 -1,951 -100.00 0 -100.00
2024-11-13 2024-09-30 13F Merck COM 58933Y105 1,951 -35 -1.76 222 -9.80 0.0605
2024-08-08 2024-06-30 13F Merck COM 58933Y105 1,986 0 0.00 246 -6.49 0.0737
2024-05-10 2024-03-31 13F Merck COM 58933Y105 1,986 -249 -11.14 262 7.82 0.0778
2024-02-08 2023-12-31 13F Merck COM 58933Y105 2,235 -20 -0.89 244 4.74 0.0739
2023-11-09 2023-09-30 13F Merck COM 58933Y105 2,255 100 4.64 232 -6.45 0.0803
2023-08-10 2023-06-30 13F Merck COM 58933Y105 2,155 181 9.17 249 0.0817
2023-05-10 2023-03-31 13F Merck COM 58933Y105 1,974 -360 -15.42 0 0.0714
2023-02-09 2022-12-31 13F Merck COM 58933Y105 2,334 -350 -13.04 0 -100.00 0.0897
2022-11-10 2022-09-30 13F Merck COM 58933Y105 2,684 200 8.05 231 2.21 0.0859
2022-08-10 2022-06-30 13F Merck COM 58933Y105 2,484 -95 -3.68 226 6.60 0.0772
2022-05-10 2022-03-31 13F Merck COM 58933Y105 2,579 2,579 212 0.0632
2021-05-12 2021-03-31 13F Merck COM 58933Y105 0 -2,511 -100.00 0 -100.00
2021-02-08 2020-12-31 13F Merck COM 58933Y105 2,511 0 0.00 205 -1.44 0.0705
2020-11-10 2020-09-30 13F Merck COM 58933Y105 2,511 2,511 208 0.0921
2020-05-07 2020-03-31 13F Merck COM 58933Y105 0 -2,511 -100.00 0 -100.00
2020-02-06 2019-12-31 13F Merck COM 58933Y105 2,511 2,511 228 0.0926
2018-02-09 2017-12-31 13F Merck COM 58933Y105 0 -3,744 -100.00 0 -100.00
2017-11-03 2017-09-30 13F Merck COM 58933Y105 3,744 0 0.00 240 0.00 0.1118
2017-08-10 2017-06-30 13F Merck COM 58933Y105 3,744 0 0.00 240 0.84 0.1128
2017-05-11 2017-03-31 13F Merck COM 58933Y105 3,744 -1,050 -21.90 238 -15.60 0.1212
2017-02-08 2016-12-31 13F Merck COM 58933Y105 4,794 210 4.58 282 -1.40 0.1451
2016-11-02 2016-09-30 13F Merck COM 58933Y105 4,584 0 0.00 286 8.33 0.1494
2016-07-28 2016-06-30 13F Merck COM 58933Y105 4,584 -640 -12.25 264 -4.35 0.1414
2016-04-22 2016-03-31 13F Merck COM 58933Y105 5,224 90 1.75 276 1.85 0.1473
2016-02-11 2015-12-31 13F Merck COM 58933Y105 5,134 0 0.00 271 6.69 0.1410
2015-11-12 2015-09-30 13F Merck COM 58933Y105 5,134 -35 -0.68 254 -13.61 0.1392
2015-08-13 2015-06-30 13F Merck COM 58933Y105 5,169 5,169 0.00 294 0.1503
2015-05-14 2015-03-31 13F Merck COM 58933Y105 0 -5,362 -100.00 0 -100.00
2015-02-12 2014-12-31 13F Merck COM 58933Y105 5,362 22 0.41 305 -3.79 0.1407
2014-11-12 2014-09-30 13F Merck COM 58933Y105 5,340 -100 -1.84 317 0.63 0.1531
2014-08-07 2014-06-30 13F Merck COM 58933Y105 5,440 95 1.78 315 3.96 0.1376
2014-05-13 2014-03-31 13F Merck COM 58933Y105 5,345 0 0.00 303 13.06 0.1342
2014-02-14 2013-12-31 13F Merck COM 58933Y105 5,345 1,000 23.01 268 29.47 0.1176
2013-11-15 2013-09-30 13F Merck COM 58933Y105 4,345 0 0.00 207 2.48 0.0964
2013-08-14 2013-06-30 13F Merck COM 58933Y105 4,345 4,345 202 0.1027
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.