Merck & Co., Inc.
MX ˙ BMV ˙ US58933Y1055
SecurityMX:MRK / Merck & Co., Inc.
InstitutionRichard Bernstein Advisors LLC
Latest Disclosed Ownership18,815 shares
Latest Disclosed Value $ 2,263,256
Richard Bernstein Advisors LLC ownership in MRK / Merck & Co., Inc.

On April 22, 2026 - Richard Bernstein Advisors LLC filed a 13F-HR form disclosing ownership of 18,815 shares of Merck & Co., Inc. (MX:MRK) valued at $2,263,256 USD as of March 31, 2026. The entity filed a previous 13F-HR on February 3, 2026 disclosing 18,815 shares of Merck & Co., Inc.. This represents a change in shares of 0.00% 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)
2026-04-22 2026-03-31 13F MERCK COM 58933Y105 18,815 0 0.00 2,263 14.29 0.0656
2026-02-03 2025-12-31 13F MERCK COM 58933Y105 18,815 -1,945 -9.37 1,980 13.66 0.0582
2025-11-13 2025-09-30 13F MERCK COM 58933Y105 20,760 -18,245 -46.78 1,742 -43.57 0.0497
2025-08-06 2025-06-30 13F MERCK COM 58933Y105 39,005 0 0.00 3,088 -11.83 0.0762
2025-04-29 2025-03-31 13F MERCK COM 58933Y105 39,005 -824 -2.07 3,501 -11.64 0.0847
2025-02-04 2024-12-31 13F MERCK COM 58933Y105 39,829 0 0.00 3,962 -12.38 0.0898
2024-11-08 2024-09-30 13F MERCK COM 58933Y105 39,829 -4,216 -9.57 4,523 -17.06 0.0970
2024-07-30 2024-06-30 13F MERCK COM 58933Y105 44,045 0 0.00 5,453 -6.18 0.1208
2024-05-09 2024-03-31 13F MERCK COM 58933Y105 44,045 0 0.00 5,812 21.04 0.1247
2024-02-14 2023-12-31 13F MERCK COM 58933Y105 44,045 40 0.09 4,802 5.98 0.1064
2023-11-14 2023-09-30 13F MERCK COM 58933Y105 44,005 -17,356 -28.29 4,530 -36.02 0.1011
2023-08-11 2023-06-30 13F MERCK COM 58933Y105 61,361 -1,544 -2.45 7,080 5.80 0.1496
2023-05-12 2023-03-31 13F MERCK COM 58933Y105 62,905 0 0.00 6,692 -4.11 0.1419
2023-02-14 2022-12-31 13F MERCK COM 58933Y105 62,905 5,290 9.18 6,979 40.68 0.1559
2022-11-14 2022-09-30 13F MERCK COM 58933Y105 57,615 -8,677 -13.09 4,961 -17.92 0.1239
2022-08-02 2022-06-30 13F MERCK COM 58933Y105 66,292 9,464 16.65 6,044 29.62 0.1312
2022-05-12 2022-03-31 13F MERCK COM 58933Y105 56,828 0 0.00 4,663 7.07 0.0921
2022-02-11 2021-12-31 13F MERCK COM 58933Y105 56,828 0 0.00 4,355 2.06 0.0840
2021-11-09 2021-09-30 13F MERCK COM 58933Y105 56,828 4,313 8.21 4,267 4.51 0.0860
2021-08-05 2021-06-30 13F MERCK COM 58933Y105 52,515 0 0.00 4,083 0.89 0.0846
2021-05-14 2021-03-31 13F MERCK & CO. COM 58933Y105 52,515 0 0.00 4,047 -5.80 0.0924
2021-02-09 2020-12-31 13F MERCK & CO. COM 58933Y105 52,515 0 0.00 4,296 -1.38 0.1056
2020-11-12 2020-09-30 13F MERCK & CO. COM 58933Y105 52,515 0 0.00 4,356 6.97 0.1222
2020-08-14 2020-06-30 13F MERCK & CO. COM 58933Y105 52,515 0 0.00 4,072 0.52 0.1275
2020-05-13 2020-03-31 13F MERCK & CO. COM 58933Y105 52,515 -37,945 -41.95 4,051 -50.76 0.1438
2020-02-13 2019-12-31 13F MERCK COM 58933Y105 90,460 0 0.00 8,227 8.05 0.2661
2019-11-14 2019-09-30 13F MERCK COM 58933Y105 90,460 -16,487 -15.42 7,614 -15.09 0.2493
2019-08-09 2019-06-30 13F MERCK COM 58933Y105 106,947 0 0.00 8,967 0.82 0.2976
2019-05-13 2019-03-31 13F MERCK COM 58933Y105 106,947 -8,278 -7.18 8,894 1.02 0.2884
2019-02-12 2018-12-31 13F MERCK COM 58933Y105 115,225 0 0.00 8,804 7.71 0.3241
2018-11-13 2018-09-30 13F MERCK COM 58933Y105 115,225 69,558 152.32 8,174 194.88 0.2351
2018-08-10 2018-06-30 13F MERCK COM 58933Y105 45,667 3,674 8.75 2,772 21.21 0.0888
2018-05-14 2018-03-31 13F MERCK COM 58933Y105 41,993 0 0.00 2,287 -3.22 0.0812
2018-02-13 2017-12-31 13F MERCK COM 58933Y105 41,993 7,491 21.71 2,363 6.97 0.1037
2017-11-14 2017-09-30 13F MERCK COM 58933Y105 34,502 0 0.00 2,209 -0.09 0.1530
2017-08-04 2017-06-30 13F MERCK COM 58933Y105 34,502 0 0.00 2,211 0.87 0.1689
2017-05-09 2017-03-31 13F MERCK COM 58933Y105 34,502 0 0.00 2,192 7.93 0.1696
2017-02-14 2016-12-31 13F MERCK COM 58933Y105 34,502 0 0.00 2,031 -5.67 0.1701
2016-11-09 2016-09-30 13F MERCK COM 58933Y105 34,502 0 0.00 2,153 8.30 0.2049
2016-07-08 2016-06-30 13F MERCK COM 58933Y105 34,502 0 0.00 1,988 8.87 0.1890
2016-05-03 2016-03-31 13F MERCK & CO INC COM 58933Y105 34,502 -72,049 -67.62 1,826 -67.56 0.1824
2016-02-12 2015-12-31 13F MERCK & CO INC COM 58933Y105 106,551 0 0.00 5,628 6.94 0.7208
2015-10-29 2015-09-30 13F MERCK & CO INC COM 58933Y105 106,551 0 0.00 5,263 -13.24 0.7191
2015-08-11 2015-06-30 13F MERCK & CO INC COM 58933Y105 106,551 106,551 6,066 0.7325
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.