Merck & Co., Inc.
BG ˙ BUL ˙ US58933Y1055
SecurityBG:6MK / Merck & Co., Inc.
InstitutionCohen Klingenstein LLC
Latest Disclosed Ownership124,194 shares
Latest Disclosed Value $ 14,939,296
Cohen Klingenstein LLC ownership in 6MK / Merck & Co., Inc.

On April 15, 2026 - Cohen Klingenstein LLC filed a 13F-HR form disclosing ownership of 124,194 shares of Merck & Co., Inc. (BG:6MK) valued at $14,939,296 USD as of March 31, 2026. The entity filed a previous 13F-HR on January 20, 2026 disclosing 124,194 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)
2026-04-15 2026-03-31 13F Merck COM 589331107 124,194 0 0.00 14,939 14.28 0.4835
2026-01-20 2025-12-31 13F Merck COM 589331107 124,194 0 0.00 13,073 25.41 0.3972
2025-10-16 2025-09-30 13F Merck COM 589331107 124,194 -3,041 -2.39 10,424 3.50 0.3266
2025-07-18 2025-06-30 13F Merck COM 589331107 127,235 -100 -0.08 10,072 -11.88 0.3361
2025-04-15 2025-03-31 13F Merck COM 589331107 127,335 -7,001 -5.21 11,430 -14.47 0.4141
2025-01-15 2024-12-31 13F Merck COM 589331107 134,336 -17,080 -11.28 13,364 -22.28 0.4572
2024-10-16 2024-09-30 13F Merck COM 589331107 151,416 -164 -0.11 17,195 -8.37 0.5990
2024-07-15 2024-06-30 13F Merck COM 589331107 151,580 0 0.00 18,766 -6.17 0.6811
2024-04-12 2024-03-31 13F Merck COM 589331107 151,580 0 0.00 20,001 21.03 0.7446
2024-01-16 2023-12-31 13F Merck COM 589331107 151,580 -145 -0.10 16,525 5.79 0.6757
2023-10-13 2023-09-30 13F Merck COM 589331107 151,725 -207 -0.14 15,620 -10.90 0.7075
2023-07-14 2023-06-30 13F Merck COM 589331107 151,932 -1,800 -1.17 17,531 7.19 0.7594
2023-04-14 2023-03-31 13F Merck COM 589331107 153,732 -1,045 -0.68 16,356 -4.76 0.7680
2023-01-13 2022-12-31 13F Merck COM 589331107 154,777 -784 -0.50 17,173 28.18 0.8642
2022-10-12 2022-09-30 13F Merck COM 589331107 155,561 1 0.00 13,397 -5.54 0.7102
2022-07-15 2022-06-30 13F Merck COM 589331107 155,560 -1,675 -1.07 14,182 9.93 0.7113
2022-04-14 2022-03-31 13F Merck COM 589331107 157,235 0 0.00 12,901 7.06 0.5357
2022-01-14 2021-12-31 13F Merck COM 589331107 157,235 -23,014 -12.77 12,050 -11.00 0.4765
2021-10-15 2021-09-30 13F Merck COM 589331107 180,249 -24,677 -12.04 13,539 -15.05 0.5919
2021-07-16 2021-06-30 13F Merck COM 589331107 204,926 0 0.00 15,937 0.88 0.6851
2021-04-15 2021-03-31 13F Merck COM 589331107 204,926 0 0.00 15,798 -5.76 0.7289
2021-01-25 2020-12-31 13F/A-1 Merck COM 589331107 204,926 0 0.00 16,763 -1.39 0.8375
2021-01-19 2020-12-31 13F Merck COM 589331107 204,926 0 16,763 837,167.1657
2020-10-19 2020-09-30 13F Merck COM 589331107 204,926 0 0.00 16,999 7.27 0.9579
2020-07-15 2020-06-30 13F Merck COM 589331107 204,926 0 0.00 15,847 0.51 0.9722
2020-04-15 2020-03-31 13F Merck COM 589331107 204,926 0 0.00 15,767 -15.40 1.1663
2020-01-15 2019-12-31 13F Merck COM 589331107 204,926 0 0.00 18,638 8.04 1.0825
2019-10-17 2019-09-30 13F Merck COM 589331107 204,926 23,000 12.64 17,251 13.09 1.0842
2019-07-15 2019-06-30 13F Merck COM 589331107 181,926 -23,374 -11.39 15,254 -10.66 1.0868
2019-04-16 2019-03-31 13F Merck COM 589331107 205,300 117,825 134.70 17,075 155.46 1.1903
2019-01-18 2018-12-31 13F Merck COM 589331107 87,475 0 0.00 6,684 7.72 1.0099
2018-10-15 2018-09-30 13F Merck COM 589331107 87,475 0 0.00 6,205 16.85 0.7890
2018-07-13 2018-06-30 13F Merck COM 589331107 87,475 0 0.00 5,310 11.44 0.7259
2018-04-13 2018-03-31 13F Merck COM 589331107 87,475 0 0.00 4,765 -3.19 0.6763
2018-01-16 2017-12-31 13F Merck COM 589331107 87,475 0 0.00 4,922 -12.12 0.6997
2017-10-17 2017-09-30 13F Merck COM 589331107 87,475 0 0.00 5,601 -0.09 0.8456
2017-07-17 2017-06-30 13F Merck COM 589331107 87,475 0 0.00 5,606 0.86 0.8730
2017-04-13 2017-03-31 13F Merck COM 589331107 87,475 0 0.00 5,558 7.92 0.8895
2017-01-17 2016-12-31 13F Merck COM 589331107 87,475 0 0.00 5,150 -5.66 0.8798
2016-10-14 2016-09-30 13F Merck COM 589331107 87,475 16,000 22.39 5,459 32.56 0.9477
2016-07-15 2016-06-30 13F Merck COM 589331107 71,475 0 0.00 4,118 8.88 0.7572
2016-04-18 2016-03-31 13F Merck COM 589331107 71,475 0 0.00 3,782 0.19 0.7125
2016-01-20 2015-12-31 13F Merck COM 589331107 71,475 0 0.00 3,775 6.94 0.7036
2015-10-15 2015-09-30 13F Merck COM 589331107 71,475 0 0.00 3,530 -13.25 0.6960
2015-07-15 2015-06-30 13F Merck COM 589331107 71,475 0 0.00 4,069 -0.95 0.7319
2015-04-14 2015-03-31 13F Merck COM 589331107 71,475 0 0.00 4,108 1.21 0.7498
2015-01-13 2014-12-31 13F Merck COM 589331107 71,475 0 0.00 4,059 -4.20 0.7617
2014-10-14 2014-09-30 13F Merck COM 589331107 71,475 0 0.00 4,237 2.47 0.7473
2014-07-15 2014-06-30 13F Merck COM 589331107 71,475 0 0.00 4,135 1.90 0.7895
2014-04-15 2014-03-31 13F Merck COM 589331107 71,475 0 0.00 4,058 13.45 0.8064
2014-01-14 2013-12-31 13F Merck COM 589331107 71,475 -5,180 -6.76 3,577 -1.97 0.7107
2013-10-15 2013-09-30 13F Merck COM 589331107 76,655 0 0.00 3,649 2.47 0.7963
2013-07-30 2013-06-30 13F Merck COM 589331107 76,655 76,655 3,561 0.8284
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.