머크 앤 컴퍼니(Merck & Co., Inc.)
MX ˙ BMV ˙ US58933Y1055
SecurityMX:MRK / Merck & Co., Inc.
InstitutionUs Bancorp \de\
Latest Disclosed Ownership1,554,747 shares
Latest Disclosed Value $ 187,021,367
Us Bancorp \de\ ownership in MRK / Merck & Co., Inc.

On May 14, 2026 - Us Bancorp \de\ filed a 13F-HR form disclosing ownership of 1,554,747 shares of Merck & Co., Inc. (MX:MRK) valued at $187,021,367 USD as of March 31, 2026. The entity filed a previous 13F-HR on January 30, 2026 disclosing 1,580,821 shares of Merck & Co., Inc.. This represents a change in shares of -1.65% during the quarter.

Us Bancorp \de\ has a history of taking positions in derivatives of the underlying security (MRK) in the form of stock options.

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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Institutional Put/Call Ratios
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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)
2026-05-14 2026-03-31 13F MERCK COM 58933Y105 1,554,747 -26,074 -1.65 187,021 12.39 0.0700
2026-01-30 2025-12-31 13F MERCK COM 58933Y105 1,580,821 -52,426 -3.21 166,398 21.39 0.1950
2025-11-12 2025-09-30 13F MERCK COM 58933Y105 1,633,247 -68,963 -4.05 137,079 1.73 0.1625
2025-07-24 2025-06-30 13F MERCK COM 58933Y105 1,702,210 -115,264 -6.34 134,747 -17.40 0.1696
2025-05-08 2025-03-31 13F MERCK COM 58933Y105 1,817,474 -94,723 -4.95 163,137 -14.24 0.2180
2025-02-05 2024-12-31 13F MERCK COM 58933Y105 1,912,197 -53,580 -2.73 190,226 -14.79 0.2491
2024-10-28 2024-09-30 13F MERCK COM 58933Y105 1,965,777 -46,006 -2.29 223,234 -10.37 0.2866
2024-08-07 2024-06-30 13F MERCK COM 58933Y105 2,011,783 -13,519 -0.67 249,059 -6.80 0.3395
2024-05-08 2024-03-31 13F MERCK COM 58933Y105 2,025,302 -1,390 -0.07 267,239 20.95 0.3724
2024-02-09 2023-12-31 13F MERCK COM 58933Y105 2,026,692 -54,259 -2.61 220,951 3.07 0.3269
2023-11-03 2023-09-30 13F MERCK COM 58933Y105 2,080,951 402,136 23.95 214,377 10.66 0.3504
2023-08-10 2023-06-30 13F MERCK COM 58933Y105 1,678,815 -534,162 -24.14 193,718 -17.72 0.3119
2023-05-09 2023-03-31 13F MERCK COMMON STOCK 58933Y105 2,212,977 -13,966 -0.63 235,439 -4.71 0.3978
2023-02-13 2022-12-31 13F MERCK COMMON STOCK 58933Y105 2,226,943 438,307 24.51 247,080 60.40 0.4374
2022-10-27 2022-09-30 13F MERCK COMMON STOCK 58933Y105 1,788,636 -99,719 -5.28 154,038 -10.53 0.3179
2022-08-01 2022-06-30 13F MERCK COMMON STOCK 58933Y105 1,888,355 11,562 0.62 172,163 11.80 0.3337
2022-05-11 2022-03-31 13F MERCK COMMON STOCK 58933Y105 1,876,793 -33,915 -1.77 153,992 5.16 0.2563
2022-02-11 2021-12-31 13F MERCK COMMON STOCK 58933Y105 1,910,708 7,428 0.39 146,437 2.44 0.2309
2021-11-10 2021-09-30 13F MERCK COMMON STOCK 58933Y105 1,903,280 -5,375 -0.28 142,956 -3.69 0.2689
2021-08-05 2021-06-30 13F MERCK COMMON STOCK 58933Y105 1,908,655 -11,430 -0.60 148,436 0.28 0.2780
2021-04-28 2021-03-31 13F MERCK COMMON STOCK 58933Y105 1,920,085 -40,336 -2.06 148,020 -7.70 0.2994
2021-02-04 2020-12-31 13F MERCK COMMON STOCK 58933Y105 1,960,421 -38,497 -1.93 160,363 -3.29 0.3454
2020-11-10 2020-09-30 13F MERCK COMMON STOCK 58933Y105 1,998,918 -17,981 -0.89 165,812 6.31 0.4044
2020-08-07 2020-06-30 13F MERCK COMMON STOCK 58933Y105 2,016,899 -14,384 -0.71 155,966 -0.20 0.4093
2020-05-13 2020-03-31 13F MERCK COMMON STOCK 58933Y105 2,031,283 -7,100 -0.35 156,286 -15.70 0.4875
2020-02-04 2019-12-31 13F MERCK COMMON STOCK 58933Y105 2,038,383 -28,839 -1.40 185,393 6.54 0.4740
2019-11-08 2019-09-30 13F MERCK COMMON STOCK 58933Y105 2,067,222 -10,274 -0.49 174,020 -0.10 0.4742
2019-08-13 2019-06-30 13F MERCK COMMON STOCK 58933Y105 2,077,496 -14,304 -0.68 174,198 0.13 0.4855
2019-05-08 2019-03-31 13F MERCK COMMON STOCK 58933Y105 2,091,800 -21,336 -1.01 173,974 7.75 0.5021
2019-02-13 2018-12-31 13F MERCK COMMON STOCK 58933Y105 2,113,136 -27,795 -1.30 161,465 6.31 0.5214
2018-10-31 2018-09-30 13F MERCK COMMON STOCK 58933Y105 2,140,931 -28,034 -1.29 151,878 15.36 0.4396
2018-08-08 2018-06-30 13F MERCK COMMON STOCK 58933Y105 2,168,965 -22,226 -1.01 131,656 10.31 0.4033
2018-05-08 2018-03-31 13F MERCK COMMON STOCK 58933Y105 2,191,191 -11,729 -0.53 119,354 -3.71 0.3662
2018-02-02 2017-12-31 13F MERCK COMMON STOCK 58933Y105 2,202,920 -59,810 -2.64 123,958 -14.44 0.3790
2017-11-13 2017-09-30 13F MERCK COMMON STOCK 58933Y105 2,262,730 13,971 0.62 144,883 0.53 0.4641
2017-07-19 2017-06-30 13F MERCK COMMON STOCK 58933Y105 2,248,759 -42,495 -1.85 144,124 -1.00 0.4809
2017-05-03 2017-03-31 13F MERCK COMMON STOCK 58933Y105 2,291,254 -3,391 -0.15 145,586 7.77 0.4987
2017-02-08 2016-12-31 13F MERCK COMMON STOCK 58933Y105 2,294,645 20,261 0.89 135,085 -4.83 0.4860
2016-11-04 2016-09-30 13F MERCK COMMON STOCK 58933Y105 2,274,384 -40,414 -1.75 141,944 6.44 0.5261
2016-08-10 2016-06-30 13F MERCK COMMON STOCK 58933Y105 2,314,798 8,955 0.39 133,356 9.31 0.5072
2016-05-13 2016-03-31 13F MERCK COMMON STOCK 58933Y105 2,305,843 -32,448 -1.39 122,002 -1.22 0.4795
2016-02-10 2015-12-31 13F MERCK COMMON STOCK 58933Y105 2,338,291 -196,926 -7.77 123,509 -1.36 0.4969
2015-11-16 2015-09-30 13F MERCK AND COMMON STOCK 58933Y105 2,535,217 -64,716 -2.49 125,215 -15.40 0.5250
2015-08-10 2015-06-30 13F MERCK AND COMMON STOCK 58933Y105 2,599,933 2,944 0.11 148,014 -0.84 0.5736
2015-05-08 2015-03-31 13F MERCK AND COMMON STOCK 58933Y105 2,596,989 14,531 0.56 149,274 1.78 0.5736
2015-02-13 2014-12-31 13F MERCK AND COMMON STOCK 58933Y105 2,582,458 -59,522 -2.25 146,658 -6.36 0.5669
2014-11-14 2014-09-30 13F MERCK AND COMMON STOCK 58933Y105 2,641,980 -30,663 -1.15 156,616 1.30 0.6344
2014-08-14 2014-06-30 13F MERCK AND COMMON STOCK 58933Y105 2,672,643 -39,388 -1.45 154,612 0.42 0.6161
2014-05-14 2014-03-31 13F MERCK AND COMMON STOCK 58933Y105 2,712,031 14,902 0.55 153,962 14.05 0.6310
2014-02-13 2013-12-31 13F MERCK AND COMMON STOCK 58933Y105 2,697,129 -45,901 -1.67 134,992 3.37 0.5469
2013-11-07 2013-09-30 13F MERCK AND COMMON STOCK 58933Y105 2,743,030 -183,673 -6.28 130,593 -3.94 0.5770
2013-08-09 2013-06-30 13F MERCK AND COMMON STOCK 58933Y105 2,926,703 2,926,703 135,945 0.6203
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
(%)
2023-11-03 2023-09-30 13F MERCK COM Put 0 -100.00 0 -100.00 n/a n/a n/a
2023-08-10 2023-06-30 13F MERCK COM Put 480,611 55,458 n/a n/a n/a
2021-02-04 2020-12-31 13F MERCK COMMON STOCK Put 0 -100.00 0 -100.00 n/a n/a n/a
2020-11-10 2020-09-30 13F MERCK COMMON STOCK Put 382 0.00 11 -88.54 n/a n/a n/a
2020-08-07 2020-06-30 13F MERCK COMMON STOCK Put 382 14.37 96 -36.00 n/a n/a n/a
2020-05-13 2020-03-31 13F MERCK COMMON STOCK Put 334 0.00 150 383.87 n/a n/a n/a
2020-02-04 2019-12-31 13F MERCK COMMON STOCK Put 334 31 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.