Merck & Co., Inc.
MX ˙ BMV ˙ US58933Y1055
SecurityMX:MRK / Merck & Co., Inc.
InstitutionKlingman & Associates, LLC
Latest Disclosed Ownership10,297 shares
Latest Disclosed Value $ 1,238,627
Klingman & Associates, LLC reports 2.01% decrease in ownership of MRK / Merck & Co., Inc.

On May 14, 2026 - Klingman & Associates, LLC filed a 13F-HR form disclosing ownership of 10,297 shares of Merck & Co., Inc. (MX:MRK) valued at $1,238,627 USD as of March 31, 2026. The entity filed a previous 13F-HR on January 29, 2026 disclosing 10,508 shares of Merck & Co., Inc.. This represents a change in shares of -2.01% 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)
2026-05-14 2026-03-31 13F MERCK COM 58933Y105 10,297 -211 -2.01 1,239 11.93 0.0593
2026-01-29 2025-12-31 13F MERCK COM 58933Y105 10,508 316 3.10 1,106 29.36 0.0534
2025-10-27 2025-09-30 13F MERCK COM 58933Y105 10,192 408 4.17 855 10.47 0.0432
2025-07-30 2025-06-30 13F MERCK COM 58933Y105 9,784 109 1.13 775 -10.83 0.0427
2025-05-13 2025-03-31 13F MERCK COM 58933Y105 9,675 120 1.26 868 -8.63 0.0532
2025-01-31 2024-12-31 13F MERCK COM 58933Y105 9,555 45 0.47 951 -11.96 0.0584
2024-11-01 2024-09-30 13F MERCK COM 58933Y105 9,510 -84 -0.88 1,080 -9.10 0.0669
2024-07-30 2024-06-30 13F MERCK COM 58933Y105 9,594 694 7.80 1,188 1.11 0.0802
2024-05-01 2024-03-31 13F MERCK COM 58933Y105 8,900 11 0.12 1,174 21.16 0.0815
2024-01-29 2023-12-31 13F MERCK COM 58933Y105 8,889 -9,859 -52.59 969 -49.79 0.0711
2023-10-30 2023-09-30 13F MERCK COM 58933Y105 18,748 3,068 19.57 1,930 6.69 0.1560
2023-07-31 2023-06-30 13F MERCK COM 58933Y105 15,680 42 0.27 1,809 8.78 0.1460
2023-05-03 2023-03-31 13F MERCK COM 58933Y105 15,638 -79 -0.50 1,664 -4.59 0.1433
2023-02-03 2022-12-31 13F MERCK COM 58933Y105 15,717 -286 -1.79 1,744 26.49 0.1529
2022-10-28 2022-09-30 13F MERCK COM 58933Y105 16,003 -92 -0.57 1,378 -6.07 0.1353
2022-07-27 2022-06-30 13F MERCK COM 58933Y105 16,095 -20 -0.12 1,467 10.97 0.1433
2022-05-06 2022-03-31 13F MERCK COM 58933Y105 16,115 387 2.46 1,322 9.71 0.1123
2022-01-31 2021-12-31 13F MERCK COM 58933Y105 15,728 -474 -2.93 1,205 -0.99 0.1035
2021-11-01 2021-09-30 13F MERCK COM 58933Y105 16,202 6,157 61.29 1,217 55.83 0.1137
2021-07-27 2021-06-30 13F MERCK COM 58933Y105 10,045 4,434 79.02 781 80.37 0.0749
2021-04-29 2021-03-31 13F MERCK CO. COM 58933Y105 5,611 -177 -3.06 433 -8.46 0.0448
2021-02-09 2020-12-31 13F MERCK CO. COM 58933Y105 5,788 816 16.41 473 14.81 0.0546
2020-11-03 2020-09-30 13F MERCK & CO. COM 58933Y105 4,972 695 16.25 412 24.47 0.0554
2020-08-04 2020-06-30 13F MERCK & CO. COM 58933Y105 4,277 -74 -1.70 331 -1.19 0.0506
2020-04-29 2020-03-31 13F MERCK & CO. COM 58933Y105 4,351 498 12.92 335 -4.29 0.0683
2020-01-29 2019-12-31 13F MERCK COM 58933Y105 3,853 37 0.97 350 9.03 0.0573
2019-10-22 2019-09-30 13F MERCK COM 58933Y105 3,816 -87 -2.23 321 -1.83 0.0575
2019-09-27 2019-06-30 13F/A-1 MERCK COM 58933Y105 3,903 -113 -2.81 327 -2.10 0.0608
2019-05-03 2019-03-31 13F MERCK COM 58933Y105 4,016 0 0.00 334 8.79 0.0651
2019-01-28 2018-12-31 13F MERCK COM 58933Y105 4,016 -1,168 -22.53 307 -16.58 0.0691
2018-10-26 2018-09-30 13F MERCK COM 58933Y105 5,184 0 0.00 368 16.83 0.0753
2018-08-01 2018-06-30 13F MERCK COM 58933Y105 5,184 1,200 30.12 315 45.16 0.0678
2018-04-25 2018-03-31 13F MERCK COM 58933Y105 3,984 0 0.00 217 -3.12 0.0487
2018-02-02 2017-12-31 13F MERCK COM 58933Y105 3,984 0 0.00 224 -12.16 0.0490
2017-10-24 2017-09-30 13F MERCK COM 58933Y105 3,984 -220 -5.23 255 -5.20 0.0627
2017-07-21 2017-06-30 13F MERCK COM 58933Y105 4,204 -28 -0.66 269 0.00 0.0717
2017-05-04 2017-03-31 13F MERCK COM 58933Y105 4,232 221 5.51 269 13.98 0.0746
2017-01-26 2016-12-31 13F MERCK COM 58933Y105 4,011 0 0.00 236 -5.60 0.0716
2016-10-19 2016-09-30 13F MERCK COM 58933Y105 4,011 500 14.24 250 23.76 0.0753
2016-08-03 2016-06-30 13F MERCK COM 58933Y105 3,511 0 0.00 202 8.60 0.0653
2016-04-18 2016-03-31 13F MERCK & CO INC COM 58933Y105 3,511 -4,663 -57.05 186 -56.94 0.0667
2016-02-09 2015-12-31 13F MERCK & CO INC COM 58933Y105 8,174 0 0.00 432 7.20 0.1615
2016-02-09 2015-09-30 13F MERCK & CO INC COM 58933Y105 8,174 4,500 122.48 403 92.82 0.1580
2016-02-09 2015-06-30 13F MERCK & CO INC COM 58933Y105 3,674 0 0.00 209 -0.95 0.0822
2016-02-09 2015-03-31 13F MERCK & CO INC COM 58933Y105 3,674 -250 -6.37 211 -4.95 0.0868
2016-02-09 2014-12-31 13F MERCK & CO INC COM 58933Y105 3,924 3,924 222 0.0922
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.