Merck & Co., Inc.
MX ˙ BMV ˙ US58933Y1055
SecurityMX:MRK / Merck & Co., Inc.
InstitutionCommerzbank Aktiengesellschaft /fi
Latest Disclosed Ownership199,356 shares
Latest Disclosed Value $ 23,981
Commerzbank Aktiengesellschaft /fi ownership in MRK / Merck & Co., Inc.

On May 7, 2026 - Commerzbank Aktiengesellschaft /fi filed a 13F-HR form disclosing ownership of 199,356 shares of Merck & Co., Inc. (MX:MRK) valued at $23,981 USD as of March 31, 2026. The entity filed a previous 13F-HR on February 5, 2026 disclosing 350,758 shares of Merck & Co., Inc.. This represents a change in shares of -43.16% during the quarter.

Commerzbank Aktiengesellschaft /fi has a history of taking positions in derivatives of the underlying security (MRK) in the form of stock options. The firm currently holds call options representing 0 of underlying shares valued at $0 USD and put options representing 0 of underlying shares valued at $0 USD .

Note: prior versions of this page mistakenly stated that the share values represented the number of options, not the number of underlying shares. For more information on the data backing these reports, please see the SEC document Frequently Asked Questions About Form 13F.

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 .

Institutional Put/Call Ratios
(Premium Subscription Required)

In addition to reporting standard equity and debt issues, institutions with more than 100MM assets under management must also disclose their put and call option holdings. Since put options generally indicate negative sentiment, and call options indicate positive sentiment, we can get a sense of the overall institutional sentiment by plotting the ratio of puts to calls. The chart to the right plots the historical put/call ratio for this instrument.

Using Put/Call Ratio as an indicator of investor sentiment overcomes one of the key deficiencies of using total institutional ownership, which is that a significant amount of assets under management are invested passively to track indices. Passively-managed funds do not typically buy options, so the put/call ratio indicator more closely tracks the sentiment of actively-managed funds.

MX:MRK / Merck & Co., Inc. Historical Put/Call Ratio
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)
2026-05-07 2026-03-31 13F MERCK COM 58933Y105 199,356 -151,402 -43.16 24 -36.11 0.5013
2026-02-05 2025-12-31 13F MERCK COM 58933Y105 350,758 3,509 1.01 37 24.14 0.7512
2025-10-31 2025-09-30 13F MERCK COM 58933Y105 347,249 148,957 75.12 29 93.33 0.6053
2025-07-24 2025-06-30 13F MERCK COM 58933Y105 198,292 32,525 19.62 16 7.14 0.3597
2025-05-02 2025-03-31 13F MERCK COM 58933Y105 165,767 -216,556 -56.64 15 -63.16 0.3467
2025-02-06 2024-12-31 13F MERCK COM 58933Y105 382,323 38,169 11.09 38 -2.56 0.9158
2024-10-22 2024-09-30 13F MERCK COM 58933Y105 344,154 270,106 364.77 39 333.33 1.0411
2024-07-22 2024-06-30 13F MERCK COM 58933Y105 74,048 9,143 14.09 9 12.50 0.3029
2024-05-10 2024-03-31 13F MERCK COM 58933Y105 64,905 17,638 37.32 9 60.00 0.2843
2024-09-30 2023-12-31 13F/A-1 MERCK COM 58933Y105 47,267 13,441 39.74 5 66.67 0.2046
2024-02-01 2023-12-31 13F MERCK COM 58933Y105 49,449 13,441 5 0.2145
2024-09-30 2023-09-30 13F/A-1 MERCK COM 58933Y105 33,826 6,859 25.43 3 0.00 0.1652
2023-11-09 2023-09-30 13F MERCK COM 58933Y105 36,008 6,859 4 0.1776
2024-10-01 2023-06-30 13F/A-2 MERCK COM 58933Y105 26,967 3,483 14.83 3 50.00 0.1525
2024-09-30 2023-06-30 13F/A-1 MERCK COM 58933Y105 26,967 3,483 3 0.1525
2023-08-04 2023-06-30 13F MERCK COM 58933Y105 29,149 3,483 3 0.4130
2024-10-02 2023-03-31 13F/A-3 MERCK COM 58933Y105 23,484 -151 -0.64 2 0.00 0.1347
2024-09-30 2023-03-31 13F/A-2 MERCK COM 58933Y105 23,484 -151 2 0.1347
2023-06-08 2023-03-31 13F/A-1 MERCK COM 58933Y105 25,666 -151 3 0.4547
2023-04-25 2023-03-31 13F MERCK COM 58933Y105 25,666 -151 3 0.5436
2024-10-02 2022-12-31 13F/A-3 MERCK COM 58933Y105 23,635 -15,635 -39.81 3 -33.33 0.1634
2024-09-30 2022-12-31 13F/A-2 MERCK COM 58933Y105 23,635 -15,635 3 0.1634
2023-06-08 2022-12-31 13F/A-1 MERCK COM 58933Y105 25,817 -15,635 3 0.4092
2023-01-24 2022-12-31 13F MERCK COM 58933Y105 25,817 -15,635 3 0.4695
2024-10-02 2022-09-30 13F/A-3 MERCK COM 58933Y105 39,270 14,900 61.14 3 50.00 0.2501
2024-09-30 2022-09-30 13F/A-2 MERCK COM 58933Y105 39,270 14,900 3 0.2501
2023-06-08 2022-09-30 13F/A-1 MERCK COM 58933Y105 41,452 14,830 4 0.5812
2022-11-02 2022-09-30 13F MERCK COM 58933Y105 25,817 -805 2,223 0.4103
2024-10-02 2022-06-30 13F/A-2 MERCK COM 58933Y105 24,370 1,335 5.80 2 100.00 0.1552
2024-10-01 2022-06-30 13F/A-1 MERCK COM 58933Y105 24,370 1,335 2 0.1552
2022-07-29 2022-06-30 13F MERCK COM 58933Y105 26,622 26,622 2,427 1.6201
2024-10-02 2022-03-31 13F/A-2 MERCK COM 58933Y105 23,035 9,775 73.72 2 0.00 0.1074
2024-10-01 2022-03-31 13F/A-1 MERCK COM 58933Y105 23,035 9,775 2 0.1074
2024-10-02 2021-12-31 13F/A-2 MERCK COM 58933Y105 13,260 -750 -5.35 1 0.00 0.0577
2024-10-01 2021-12-31 13F/A-1 MERCK COM 58933Y105 13,260 -750 1 0.0577
2024-10-01 2021-09-30 13F/A-1 MERCK COM 58933Y105 14,010 2,630 23.11 1 0.0628
2024-10-02 2021-06-30 13F/A-1 MERCK COM 58933Y105 11,380 2,770 32.17 1 0.0563
2024-10-02 2021-03-31 13F/A-1 MERCK & CO. COM 58933Y105 8,610 4,860 129.60 1 -100.00 0.0448
2024-10-03 2020-12-31 13F/A-1 MERCK & CO. COM 58933Y105 3,750 -1,250 -25.00 0 0.0233
2021-01-27 2020-12-31 13F MERCK & CO. COM 58933Y105 5,586 5,586 457 0.1359
2024-10-03 2020-09-30 13F/A-1 MERCK & CO. COM 58933Y105 5,000 5,000 0 0.0399
2024-10-03 2020-06-30 13F/A-1 MERCK & CO. COM 58933Y105 0 -16,099 -100.00 0 -100.00
2020-07-21 2020-06-30 13F MERCK & CO. COM 58933Y105 0 -16,099 0
2024-10-03 2020-03-31 13F/A-1 MERCK & CO. COM 58933Y105 16,099 -294,087 -94.81 1 -96.43 0.0554
2020-04-29 2020-03-31 13F MERCK & CO. COM 58933Y105 14,849 -294,587 1,142 0.0700
2024-10-03 2019-12-31 13F/A-1 MERCK COM 58933Y105 310,186 -204,980 -39.79 28 -34.88 0.2747
2020-01-17 2019-12-31 13F MERCK COM 58933Y105 309,436 -207,463 28,143 0.2951
2024-10-03 2019-09-30 13F/A-1 MERCK COM 58933Y105 515,166 77,860 17.80 43 19.44 0.3318
2019-10-17 2019-09-30 13F MERCK COM 58933Y105 516,899 77,893 43,513 0.3538
2024-10-03 2019-06-30 13F/A-1 MERCK COM 58933Y105 437,306 71,856 19.66 37 20.00 0.2902
2019-07-23 2019-06-30 13F MERCK COM 58933Y105 439,006 71,856 36,811 0.2591
2024-10-03 2019-03-31 13F/A-1 MERCK COM 58933Y105 365,450 -13,881 -3.66 30 7.14 0.2772
2019-05-13 2019-03-31 13F MERCK COM 58933Y105 367,150 -13,881 30,536 0.3084
2024-10-03 2018-12-31 13F/A-1 MERCK COM 58933Y105 379,331 13,437 3.67 29 12.00 0.2961
2019-02-06 2018-12-31 13F MERCK COM 58933Y105 381,031 13,437 29,115 0.3172
2024-10-04 2018-09-30 13F/A-1 MERCK COM 58933Y105 365,894 -64,568 -15.00 26 -3.85 0.2250
2018-11-13 2018-09-30 13F MERCK COM 58933Y105 367,594 -64,568 26,077 0.2465
2024-10-04 2018-06-30 13F/A-1 MERCK COM 58933Y105 430,462 -210,587 -32.85 26 -23.53 0.2476
2024-10-04 2018-06-30 13F/A-1 MERCK COM 58933Y105 430,462 -210,587 26 0.2476
2018-08-10 2018-06-30 13F MERCK COM 58933Y105 432,162 -210,587 26,232 0.2680
2024-10-04 2018-03-31 13F/A-1 MERCK COM 58933Y105 641,049 158,479 32.84 35 25.93 0.3591
2018-05-01 2018-03-31 13F MERCK COM 58933Y105 642,749 162,879 35,011 0.3898
2024-10-04 2017-12-31 13F/A-1 MERCK COM 58933Y105 482,570 193,473 66.92 27 -99.85 0.3115
2018-01-26 2017-12-31 13F MERCK COM 58933Y105 479,870 190,773 27,002 0.3348
2017-11-13 2017-09-30 13F MERCK COM 58933Y105 289,097 27,656 10.58 18,511 10.47 0.2438
2017-08-09 2017-06-30 13F MERCK COM 58933Y105 261,441 -86,220 -24.80 16,756 -24.15 0.2813
2017-05-01 2017-03-31 13F MERCK COM 58933Y105 347,661 11,009 3.27 22,090 11.46 0.3270
2017-02-07 2016-12-31 13F MERCK COM 58933Y105 336,652 84,452 33.49 19,819 25.91 0.2914
2016-11-10 2016-09-30 13F MERCK COM 58933Y105 252,200 -76,278 -23.22 15,740 -16.83 0.2536
2016-08-01 2016-06-30 13F MERCK COM 58933Y105 328,478 -33,197 -9.18 18,924 -1.11 0.1272
2016-05-10 2016-03-31 13F MERCK & CO INC COM 58933Y105 361,675 -175,563 -32.68 19,136 -32.57 0.1604
2016-02-11 2015-12-31 13F/A-1 MERCK & CO INC COM 58933Y105 537,238 -5,253 -0.97 28,377 5.91 0.2183
2016-02-05 2015-12-31 13F MERCK & CO INC COM 58933Y105 537,238 28,377
2015-10-29 2015-09-30 13F MERCK & CO INC COM 58933Y105 542,491 -517,966 -48.84 26,794 -55.62 0.2011
2015-08-10 2015-06-30 13F MERCK & CO INC COM 58933Y105 1,060,457 -591,913 -35.82 60,372 -36.44 0.3166
2015-05-01 2015-03-31 13F MERCK & CO INC COM 58933Y105 1,652,370 1,652,370 0.00 94,978 0.5700
2015-02-05 2014-12-31 13F MERCK & CO INC COM 58933Y105 0 -1,902,303 -100.00 0 -100.00
2014-11-13 2014-09-30 13F MERCK & CO INC COM 58933Y105 1,902,303 596,380 45.67 112,769 49.27 0.4547
2014-08-12 2014-06-30 13F MERCK & CO INC COM 58933Y105 1,305,923 -10,365 -0.79 75,548 1.10 0.3860
2014-05-14 2014-03-31 13F MERCK & CO INC COM 58933Y105 1,316,288 -218,311 -14.23 74,726 -8.07 0.3219
2014-02-13 2013-12-31 13F MERCK & CO INC COM 58933Y105 1,534,599 -1,228,136 -44.45 81,288 -38.20 0.3981
2013-11-14 2013-09-30 13F MERCK & CO INC COM 58933Y105 2,762,735 1,263,199 84.24 131,531 88.84 0.6576
2013-07-23 2013-06-30 13F MERCK & CO INC COM 58933Y105 1,499,536 1,499,536 69,653 0.3068
Disclosed Call Options
File
Date
Effective
Date
Form Security Class ID Opt Avg Share
Price
Shares ΔShares
(%)
Value
(x1000)
ΔValue
(%)
Prior Allocation
(%)
Allocation
(%)
ΔAllocation
(%)
Cost Basis
(x1000)
Profit
(x1000)
Return
(%)
2024-10-02 2021-03-31 13F/A MERCK & CO. COM Call 0 -100.00 0 n/a n/a n/a
2024-10-03 2020-12-31 13F/A MERCK & CO. COM Call 10,000 0.00 0 n/a n/a n/a
2024-10-03 2020-09-30 13F/A MERCK & CO. COM Call 10,000 -28.57 0 n/a n/a n/a
2024-10-03 2020-06-30 13F/A MERCK & CO. COM Call 14,000 0.00 0 n/a n/a n/a
2024-10-03 2020-03-31 13F/A MERCK & CO. COM Call 14,000 0 n/a n/a n/a
2024-10-03 2019-09-30 13F/A MERCK COM Call 0 -100.00 0 -100.00 n/a n/a n/a
2019-10-17 2019-09-30 13F MERCK CALL Call 0 0 n/a n/a n/a
2024-10-03 2019-06-30 13F/A MERCK COM Call 136,000 1 n/a n/a n/a
2019-07-23 2019-06-30 13F MERCK CALL Call 136,000 11,404 n/a n/a n/a
2024-10-04 2018-09-30 13F/A MERCK COM Call 0 -100.00 0 n/a n/a n/a
2024-10-04 2018-06-30 13F/A MERCK COM Call 20,000 0 n/a n/a n/a
2024-10-04 2018-06-30 13F/A MERCK COM Call 20,000 -50.00 0 n/a n/a n/a
2024-10-04 2018-03-31 13F/A MERCK COM Call 40,000 0 n/a n/a n/a
2014-11-13 2014-09-30 13F MERCK & CO INC CALL Call 0 -100.00 0 -100.00 n/a n/a n/a
2014-08-12 2014-06-30 13F MERCK & CO INC CALL Call 21,600 0.00 1,250 1.96 n/a n/a n/a
2014-05-14 2014-03-31 13F MERCK & CO INC CALL Call 21,600 -80.08 1,226 -78.66 n/a n/a n/a
2014-02-13 2013-12-31 13F MERCK & CO INC CALL Call 108,439 -43.40 5,744 -37.03 n/a n/a n/a
2013-11-14 2013-09-30 13F MERCK & CO INC CALL Call 191,600 -31.72 9,122 -30.01 n/a n/a n/a
2013-07-23 2013-06-30 13F MERCK & CO INC CALL Call 280,600 13,034 n/a n/a n/a
Disclosed Put Options
File
Date
Effective
Date
Form Security Class ID Opt Avg Share Price Shares ΔShares
(%)
Value
(x1000)
ΔValue
(%)
Prior Allocation
(%)
Allocation
(%)
ΔAllocation
(%)
Cost Basis
(x1000)
Profit
(x1000)
Return
(%)
2024-10-03 2019-09-30 13F/A MERCK COM Put 0 -100.00 0 n/a n/a n/a
2019-10-17 2019-09-30 13F MERCK PUT Put 0 0 n/a n/a n/a
2024-10-03 2019-06-30 13F/A MERCK COM Put 46,500 0 n/a n/a n/a
2019-07-23 2019-06-30 13F MERCK PUT Put 46,500 3,899 n/a n/a n/a
2024-10-03 2019-03-31 13F/A MERCK COM Put 0 -100.00 0 n/a n/a n/a
2024-10-03 2018-12-31 13F/A MERCK COM Put 217,400 0.00 0 n/a n/a n/a
2024-10-04 2018-09-30 13F/A MERCK COM Put 217,400 0.00 0 n/a n/a n/a
2024-10-04 2018-06-30 13F/A MERCK COM Put 217,400 0 n/a n/a n/a
2024-10-04 2018-06-30 13F/A MERCK COM Put 217,400 0 n/a n/a n/a
2015-02-05 2014-12-31 13F MERCK & CO INC PUT Put 0 -100.00 0 -100.00 n/a n/a n/a
2014-11-13 2014-09-30 13F MERCK & CO INC PUT Put 17,200 0.00 1,020 2.51 n/a n/a n/a
2014-08-12 2014-06-30 13F MERCK & CO INC PUT Put 17,200 0.00 995 1.95 n/a n/a n/a
2014-05-14 2014-03-31 13F MERCK & CO INC PUT Put 17,200 -3.91 976 2.95 n/a n/a n/a
2014-02-13 2013-12-31 13F MERCK & CO INC PUT Put 17,900 4.07 948 15.75 n/a n/a n/a
2013-11-14 2013-09-30 13F MERCK & CO INC PUT Put 17,200 0.00 819 2.50 n/a n/a n/a
2013-07-23 2013-06-30 13F MERCK & CO INC PUT Put 17,200 799 n/a n/a n/a
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.