Merck & Co., Inc.
MX ˙ BMV ˙ US58933Y1055
SecurityMX:MRK / Merck & Co., Inc.
InstitutionDynamic Advisor Solutions LLC
Latest Disclosed Ownership41,028 shares
Latest Disclosed Value $ 4,935,229
Dynamic Advisor Solutions LLC ownership in MRK / Merck & Co., Inc.

On April 8, 2026 - Dynamic Advisor Solutions LLC filed a 13F-HR form disclosing ownership of 41,028 shares of Merck & Co., Inc. (MX:MRK) valued at $4,935,229 USD as of March 31, 2026. The entity filed a previous 13F-HR on January 9, 2026 disclosing 41,080 shares of Merck & Co., Inc.. This represents a change in shares of -0.13% during the quarter.

Dynamic Advisor Solutions LLC 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 .

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.

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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)
2026-04-08 2026-03-31 13F MERCK COM 58933Y105 41,028 -52 -0.13 4,935 14.13 0.1555
2026-01-09 2025-12-31 13F MERCK COM 58933Y105 41,080 -2,781 -6.34 4,324 17.47 0.1388
2025-10-09 2025-09-30 13F MERCK COM 58933Y105 43,861 3,005 7.36 3,681 13.82 0.1068
2025-07-09 2025-06-30 13F MERCK COM 58933Y105 40,856 -5,564 -11.99 3,234 -22.37 0.0999
2025-04-17 2025-03-31 13F MERCK COM 58933Y105 46,420 1,266 2.80 4,167 -7.24 0.1373
2025-01-21 2024-12-31 13F MERCK COM 58933Y105 45,154 -33,551 -42.63 4,492 -49.75 0.1943
2024-10-07 2024-09-30 13F MERCK COM 58933Y105 78,705 -1,961 -2.43 8,938 -10.50 0.2682
2024-07-15 2024-06-30 13F MERCK COM 58933Y105 80,666 2,833 3.64 9,987 -2.77 0.3144
2024-04-12 2024-03-31 13F MERCK COM 58933Y105 77,833 4,433 6.04 10,270 19.38 0.3467
2024-01-10 2023-12-31 13F MERCK COM 58933Y105 73,400 24,823 51.10 8,604 72.03 0.3206
2023-10-11 2023-09-30 13F MERCK COM 58933Y105 48,577 6,493 15.43 5,001 2.99 0.2363
2023-08-03 2023-06-30 13F MERCK COM 58933Y105 42,084 -4,082 -8.84 4,856 -1.12 0.2519
2023-04-11 2023-03-31 13F MERCK COM 58933Y105 46,166 -924 -1.96 4,912 -5.99 0.2874
2023-01-13 2022-12-31 13F MERCK COM 58933Y105 47,090 9,339 24.74 5,225 60.69 0.3567
2022-10-20 2022-09-30 13F MERCK COM 58933Y105 37,751 9,053 31.55 3,251 24.27 0.2478
2022-07-27 2022-06-30 13F MERCK COM 58933Y105 28,698 2,821 10.90 2,616 23.22 0.2009
2022-04-11 2022-03-31 13F MERCK COM 58933Y105 25,877 153 0.59 2,123 7.71 0.1478
2022-01-26 2021-12-31 13F MERCK COM 58933Y105 25,724 2,671 11.59 1,971 13.80 0.1408
2021-10-28 2021-09-30 13F MERCK COM 58933Y105 23,053 1,437 6.65 1,732 3.03 0.1304
2021-08-10 2021-06-30 13F MERCK COM 58933Y105 21,616 -4,130 -16.04 1,681 -15.31 0.1332
2021-04-27 2021-03-31 13F MERCK & CO. COM 58933Y105 25,746 -872 -3.28 1,985 -8.82 0.1843
2021-02-03 2020-12-31 13F MERCK & CO. COM 58933Y105 26,618 722 2.79 2,177 1.35 0.2037
2020-10-27 2020-09-30 13F MERCK & CO. COM 58933Y105 25,896 -596 -2.25 2,148 4.83 0.2438
2020-08-05 2020-06-30 13F MERCK & CO. COM 58933Y105 26,492 1,302 5.17 2,049 5.73 0.2767
2020-05-07 2020-03-31 13F MERCK & CO. COM 58933Y105 25,190 -1,682 -6.26 1,938 -20.70 0.3536
2020-02-04 2019-12-31 13F MERCK COM 58933Y105 26,872 1,776 7.08 2,444 15.66 0.3332
2019-11-13 2019-09-30 13F MERCK COM 58933Y105 25,096 3,134 14.27 2,113 14.77 0.3279
2019-08-13 2019-06-30 13F MERCK COM 58933Y105 21,962 1,517 7.42 1,841 8.29 0.2957
2019-04-10 2019-03-31 13F MERCK COM 58933Y105 20,445 587 2.96 1,700 17.32 0.3207
2019-01-29 2018-12-31 13F MERCK COM 58933Y105 19,858 1,483 8.07 1,449 11.12 0.3078
2018-11-14 2018-09-30 13F MERCK COM 58933Y105 18,375 -1,967 -9.67 1,304 5.59 0.2704
2018-08-07 2018-06-30 13F MERCK COM 58933Y105 20,342 1,949 10.60 1,235 23.25 0.2800
2018-05-01 2018-03-31 13F MERCK COM 58933Y105 18,393 10,288 126.93 1,002 119.74 0.2571
2018-02-09 2017-12-31 13F MERCK COM 58933Y105 8,105 -14 -0.17 456 -12.31 0.1494
2017-10-16 2017-09-30 13F MERCK COM 58933Y105 8,119 -454 -5.30 520 -5.28 0.2056
2017-07-10 2017-06-30 13F MERCK COM 58933Y105 8,573 -279 -3.15 549 -2.31 0.2124
2017-04-10 2017-03-31 13F MERCK COM 58933Y105 8,852 894 11.23 562 20.09 0.2190
2017-01-19 2016-12-31 13F MERCK COM 58933Y105 7,958 180 2.31 468 -3.51 0.1866
2016-10-11 2016-09-30 13F MERCK COM 58933Y105 7,778 5 0.06 485 8.26 0.1836
2016-07-22 2016-06-30 13F MERCK COM 58933Y105 7,773 -107 -1.36 448 7.43 0.1815
2016-05-02 2016-03-31 13F MERCK & CO INC COM 58933Y105 7,880 191 2.48 417 2.71 0.1770
2016-01-20 2015-12-31 13F MERCK & CO INC COM 58933Y105 7,689 -373 -4.63 406 2.01 0.1679
2015-10-23 2015-09-30 13F MERCK & CO INC COM 58933Y105 8,062 70 0.88 398 -12.53 0.2008
2015-08-14 2015-06-30 13F MERCK & CO INC COM 58933Y105 7,992 154 1.96 455 0.89 0.2658
2015-05-12 2015-03-31 13F MERCK & CO INC COM 58933Y105 7,838 7,838 0.00 451 0.2261
2015-02-02 2014-12-31 13F MERCK & CO INC COM 58933Y105 0 -7,974 -100.00 0 -100.00
2014-12-03 2014-09-30 13F/A-1 MERCK & CO INC COM 58933Y105 7,974 963 13.74 474 16.75 0.2578
2014-11-12 2014-09-30 13F MERCK & CO INC COM 58933Y105 7,974 963 474 0.2568
2014-08-11 2014-06-30 13F MERCK & CO INC COM 58933Y105 7,011 2,650 60.77 406 63.71 0.2439
2014-05-05 2014-03-31 13F MERCK & CO INC COM 58933Y105 4,361 304 7.49 248 22.17 0.1691
2014-02-12 2013-12-31 13F MERCK & CO INC COM 58933Y105 4,057 4,057 203 0.1503
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
(%)
2021-08-10 2021-06-30 13F MERCK & CO. COM Call 0 -100.00 0 -100.00 n/a n/a n/a
2021-04-27 2021-03-31 13F MERCK & CO. COM Call 3,000 328.57 9 80.00 n/a n/a n/a
2021-02-03 2020-12-31 13F MERCK & CO. COM Call 700 -65.00 5 400.00 n/a n/a n/a
2020-10-27 2020-09-30 13F MERCK & CO. COM Call 2,000 1 n/a n/a n/a
2020-08-05 2020-06-30 13F MERCK & CO. COM Call 0 -100.00 0 -100.00 n/a n/a n/a
2020-05-07 2020-03-31 13F MERCK & CO. COM Call 2,000 3 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.