Merck & Co., Inc.
MX ˙ BMV ˙ US58933Y1055
SecurityMX:MRK / Merck & Co., Inc.
InstitutionKinneret Advisory, LLC
Latest Disclosed Ownership91,933 shares
Latest Disclosed Value $ 11,136,764
Kinneret Advisory, LLC reports 4.25% decrease in ownership of MRK / Merck & Co., Inc.

On May 14, 2026 - Kinneret Advisory, LLC filed a 13F-HR form disclosing ownership of 91,933 shares of Merck & Co., Inc. (MX:MRK) valued at $11,136,764 USD as of March 31, 2026. The entity filed a previous 13F-HR on February 12, 2026 disclosing 96,009 shares of Merck & Co., Inc.. This represents a change in shares of -4.25% 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.

Upgrade to unlock premium data and export to Excel .

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 91,933 -4,076 -4.25 11,137 9.29 1.0556
2026-02-12 2025-12-31 13F MERCK COM 58933Y105 96,009 -2,627 -2.66 10,190 21.91 0.8630
2025-11-05 2025-09-30 13F MERCK COM 58933Y105 98,636 -441 -0.45 8,358 5.49 0.7114
2025-07-25 2025-06-30 13F MERCK COM 58933Y105 99,077 -149 -0.15 7,923 -11.83 0.7214
2025-07-21 2025-03-31 13F/A-1 MERCK COM 58933Y105 99,226 -334 -0.34 8,987 -10.02 0.9058
2025-04-29 2025-03-31 13F MERCK COM 58933Y105 66,799 -32,761 6,050 0.9059
2025-02-03 2024-12-31 13F MERCK COM 58933Y105 99,560 -4,638 -4.45 9,988 -16.16 0.9429
2024-11-04 2024-09-30 13F MERCK COM 58933Y105 104,198 -1,365 -1.29 11,913 -9.33 1.0931
2024-07-26 2024-06-30 13F MERCK COM 58933Y105 105,563 14,921 16.46 13,138 9.21 1.2602
2024-04-25 2024-03-31 13F MERCK COM 58933Y105 90,642 -283 -0.31 12,030 20.52 1.2026
2024-02-14 2023-12-31 13F MERCK COM 58933Y105 90,925 -579 -0.63 9,983 5.22 1.1052
2023-10-12 2023-09-30 13F MERCK COM 58933Y105 91,504 -54 -0.06 9,487 -10.76 1.1719
2023-08-02 2023-06-30 13F MERCK COM 58933Y105 91,558 0 0.00 10,632 8.40 1.2593
2023-04-27 2023-03-31 13F MERCK COM 58933Y105 91,558 -4,919 -5.10 9,808 -8.98 1.2667
2023-02-14 2022-12-31 13F MERCK COM 58933Y105 96,477 -11,352 -10.53 10,776 15.11 1.4244
2022-11-02 2022-09-30 13F MERCK COM 58933Y105 107,829 0 0.00 9,361 -5.49 1.2986
2022-08-04 2022-06-30 13F MERCK COM 58933Y105 107,829 2,283 2.16 9,905 13.42 1.2850
2022-05-13 2022-03-31 13F MERCK & CO. COM 58933Y105 105,546 2,360 2.29 8,733 9.45 0.9586
2022-02-08 2021-12-31 13F MERCK COM 58933Y105 103,186 0 0.00 7,979 2.07 0.8260
2021-11-09 2021-09-30 13F MERCK COM 58933Y105 103,186 0 0.00 7,817 -3.40 0.9163
2021-08-16 2021-06-30 13F MERCK COM 58933Y105 103,186 0 0.00 8,092 0.04 0.9562
2021-05-13 2021-03-31 13F MERCK & CO. COM 58933Y105 103,186 0 0.00 8,089 -4.92 1.0385
2021-02-11 2020-12-31 13F MERCK & CO. COM 58933Y105 103,186 0 0.00 8,508 -1.32 1.1548
2020-11-13 2020-09-30 13F MERCK & CO. COM 58933Y105 103,186 -3,321 -3.12 8,622 3.87 1.3069
2020-08-12 2020-06-30 13F MERCK & CO. COM 58933Y105 106,507 0 0.00 8,301 0.52 1.3351
2020-05-14 2020-03-31 13F MERCK & CO. COM 58933Y105 106,507 11,917 12.60 8,258 -4.65 1.6086
2020-02-10 2019-12-31 13F MERCK COM 58933Y105 94,590 0 0.00 8,661 8.06 1.5749
2019-11-13 2019-09-30 13F MERCK COM 58933Y105 94,590 0 0.00 8,015 0.40 1.5960
2019-08-13 2019-06-30 13F MERCK COM 58933Y105 94,590 0 0.00 7,983 1.47 1.6183
2019-05-15 2019-03-31 13F MERCK COM 58933Y105 94,590 -3,814 -3.88 7,867 3.88 1.6555
2019-02-13 2018-12-31 13F MERCK COM 58933Y105 98,404 98,404 7,573 2.2423
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.