Merck & Co., Inc.
MX ˙ BMV ˙ US58933Y1055
SecurityMX:MRK / Merck & Co., Inc.
InstitutionBeech Hill Advisors, Inc.
Latest Disclosed Ownership33,989 shares
Latest Disclosed Value $ 4,088,589
Beech Hill Advisors, Inc. reports 0.82% decrease in ownership of MRK / Merck & Co., Inc.

On April 9, 2026 - Beech Hill Advisors, Inc. filed a 13F-HR form disclosing ownership of 33,989 shares of Merck & Co., Inc. (MX:MRK) valued at $4,088,589 USD as of March 31, 2026. The entity filed a previous 13F-HR on January 14, 2026 disclosing 34,269 shares of Merck & Co., Inc.. This represents a change in shares of -0.82% 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)
2026-04-09 2026-03-31 13F MERCK COM 58933Y105 33,989 -280 -0.82 4,089 13.34 2.0481
2026-01-14 2025-12-31 13F MERCK COM 58933Y105 34,269 -3,170 -8.47 3,607 14.80 1.7265
2025-10-14 2025-09-30 13F MERCK COM 58933Y105 37,439 -2,009 -5.09 3,142 0.64 1.4676
2025-07-30 2025-06-30 13F MERCK COM 58933Y105 39,448 -5,279 -11.80 3,123 -22.22 1.4053
2025-04-23 2025-03-31 13F MERCK COM 58933Y105 44,727 -336 -0.75 4,015 -10.44 1.5978
2025-01-15 2024-12-31 13F MERCK COM 58933Y105 45,063 2,552 6.00 4,483 -7.15 1.6779
2024-10-16 2024-09-30 13F MERCK COM 58933Y105 42,511 4,819 12.79 4,828 3.45 1.8302
2024-07-12 2024-06-30 13F MERCK COM 58933Y105 37,692 -460 -1.21 4,666 -7.31 1.9256
2024-04-12 2024-03-31 13F MERCK COM 58933Y105 38,152 535 1.42 5,034 22.75 2.0917
2024-01-10 2023-12-31 13F MERCK COM 58933Y105 37,617 1,041 2.85 4,101 8.92 1.9837
2023-10-11 2023-09-30 13F MERCK COM 58933Y105 36,576 -500 -1.35 3,766 -11.99 1.8987
2023-07-11 2023-06-30 13F MERCK COM 58933Y105 37,076 -75 -0.20 4,278 8.25 2.0796
2023-04-14 2023-03-31 13F MERCK COM 58933Y105 37,151 -34,335 -48.03 3,953 -50.17 1.9910
2023-01-18 2022-12-31 13F MERCK COM 58933Y105 71,486 -1,877 -2.56 7,931 25.53 4.4082
2022-10-12 2022-09-30 13F MERCK COM 58933Y105 73,363 -230 -0.31 6,318 -5.84 3.6196
2022-07-11 2022-06-30 13F MERCK COM 58933Y105 73,593 -4,345 -5.57 6,710 4.93 3.5846
2022-04-19 2022-03-31 13F MERCK COM 58933Y105 77,938 4 0.01 6,395 7.07 2.6093
2022-01-19 2021-12-31 13F MERCK COM 58933Y105 77,934 581 0.75 5,973 2.81 2.2693
2021-10-14 2021-09-30 13F MERCK COM 58933Y105 77,353 2,405 3.21 5,810 -0.33 2.4120
2021-07-15 2021-06-30 13F MERCK COM 58933Y105 74,948 -3,685 -4.69 5,829 -3.84 2.3669
2021-04-19 2021-03-31 13F MERCK & CO. COM 58933Y105 78,633 3,625 4.83 6,062 -1.21 2.5146
2021-01-22 2020-12-31 13F MERCK & CO. COM 58933Y105 75,008 -275 -0.37 6,136 -1.75 2.7275
2020-10-19 2020-09-30 13F MERCK & CO. COM 58933Y105 75,283 -1,150 -1.50 6,245 5.65 3.0793
2020-07-17 2020-06-30 13F MERCK & CO. COM 58933Y105 76,433 2,475 3.35 5,911 3.88 2.9963
2020-05-05 2020-03-31 13F MERCK & CO. COM 58933Y105 73,958 1,225 1.68 5,690 -13.98 3.8843
2020-01-17 2019-12-31 13F MERCK COM 58933Y105 72,733 2,650 3.78 6,615 12.12 3.0826
2019-10-18 2019-09-30 13F MERCK COM 58933Y105 70,083 -2,050 -2.84 5,900 -2.45 3.1522
2019-07-15 2019-06-30 13F MERCK COM 58933Y105 72,133 6,325 9.61 6,048 10.51 3.1747
2019-04-09 2019-03-31 13F MERCK COM 58933Y105 65,808 -23,182 -26.05 5,473 -19.51 3.3765
2019-01-14 2018-12-31 13F MERCK COM 58933Y105 88,990 -1,400 -1.55 6,800 6.05 4.2298
2018-10-10 2018-09-30 13F MERCK COM 58933Y105 90,390 127 0.14 6,412 17.03 3.3248
2018-08-01 2018-06-30 13F MERCK COM 58933Y105 90,263 -7,449 -7.62 5,479 2.95 3.0683
2018-04-23 2018-03-31 13F MERCK COM 58933Y105 97,712 4,861 5.24 5,322 1.86 2.8003
2018-01-22 2017-12-31 13F MERCK COM 58933Y105 92,851 23,303 33.51 5,225 17.34 2.5800
2017-10-20 2017-09-30 13F MERCK COM 58933Y105 69,548 4,375 6.71 4,453 6.61 2.3488
2017-07-18 2017-06-30 13F MERCK COM 58933Y105 65,173 -725 -1.10 4,177 -0.24 2.2830
2017-04-19 2017-03-31 13F MERCK COM 58933Y105 65,898 -375 -0.57 4,187 7.33 2.4088
2017-01-25 2016-12-31 13F MERCK COM 58933Y105 66,273 -1,678 -2.47 3,901 -8.02 2.3324
2016-10-21 2016-09-30 13F MERCK COM 58933Y105 67,951 -32,978 -32.67 4,241 -27.07 2.5946
2016-07-15 2016-06-30 13F MERCK COM 58933Y105 100,929 -720 -0.71 5,815 8.13 3.9300
2016-04-20 2016-03-31 13F MERCK & CO INC COM 58933Y105 101,649 600 0.59 5,378 0.77 4.2074
2016-01-26 2015-12-31 13F MERCK & CO INC COM 58933Y105 101,049 -3,025 -2.91 5,337 3.83 3.3747
2015-10-30 2015-09-30 13F MERCK & CO INC COM 58933Y105 104,074 -2,045 -1.93 5,140 -14.91 3.2742
2015-08-12 2015-06-30 13F MERCK & CO INC COM 58933Y105 106,119 762 0.72 6,041 -0.25 3.1058
2015-04-29 2015-03-31 13F MERCK & CO INC COM 58933Y105 105,357 105,357 0.00 6,056 2.8461
2015-01-30 2014-12-31 13F MERCK & CO INC COM 58933Y105 0 -102,482 -100.00 0 -100.00
2014-10-21 2014-09-30 13F MERCK & CO INC COM 58933Y105 102,482 -7,340 -6.68 6,075 -4.38 2.8730
2014-07-21 2014-06-30 13F MERCK & CO INC COM 58933Y105 109,822 1,540 1.42 6,353 3.35 2.7984
2014-04-25 2014-03-31 13F MERCK & CO INC COM 58933Y105 108,282 7,575 7.52 6,147 21.96 2.8856
2014-01-28 2013-12-31 13F MERCK & CO INC COM 58933Y105 100,707 1,378 1.39 5,040 6.58 2.5443
2013-10-23 2013-09-30 13F MERCK & CO INC COM 58933Y105 99,329 -2,014 -1.99 4,729 0.47 2.5582
2013-07-29 2013-06-30 13F MERCK & CO INC COM 58933Y105 101,343 101,343 4,707 2.6631
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.