Merck & Co., Inc.
MX ˙ BMV ˙ US58933Y1055
SecurityMX:MRK / Merck & Co., Inc.
InstitutionGolden State Wealth Management, LLC
Latest Disclosed Ownership6,725 shares
Latest Disclosed Value $ 808,954
Golden State Wealth Management, LLC ownership in MRK / Merck & Co., Inc.

On April 28, 2026 - Golden State Wealth Management, LLC filed a 13F-HR form disclosing ownership of 6,725 shares of Merck & Co., Inc. (MX:MRK) valued at $808,954 USD as of March 31, 2026. The entity filed a previous 13F-HR on February 13, 2026 disclosing 7,124 shares of Merck & Co., Inc.. This represents a change in shares of -5.60% during the quarter.

Golden State Wealth Management, 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)
2026-04-28 2026-03-31 13F MERCK Common Stock 58933Y105 6,725 -399 -5.60 809 7.88 0.0884
2026-02-13 2025-12-31 13F MERCK Common Stock 58933Y105 7,124 9 0.13 750 25.46 0.0792
2025-11-03 2025-09-30 13F MERCK Common Stock 58933Y105 7,115 628 9.68 597 16.37 0.0659
2025-08-06 2025-06-30 13F MERCK Common Stock 58933Y105 6,487 -23 -0.35 514 -12.16 0.0625
2025-04-24 2025-03-31 13F/A-1 MERCK Common Stock 58933Y105 6,510 -450 -6.47 584 -15.61 0.0868
2025-04-23 2025-03-31 13F MERCK Common Stock 58933Y105 17,073 10,113 1,533 0.0007
2025-01-28 2024-12-31 13F MERCK Common Stock 58933Y105 6,960 1,713 32.65 692 60.56 0.1037
2022-05-19 2022-03-31 13F/A-1 MERCK Common Stock 58933Y105 5,247 -5,163 -49.60 431 -45.99 0.0845
2022-05-16 2022-03-31 13F MERCK Common Stock 58933Y105 4,886 -5,524 376 0.1240
2022-02-14 2021-12-31 13F MERCK Common Stock 58933Y105 10,410 5,231 101.00 798 105.14 0.1374
2021-11-15 2021-09-30 13F MERCK Common Stock 58933Y105 5,179 61 1.19 389 -2.26 0.0846
2021-08-12 2021-06-30 13F MERCK Common Stock 58933Y105 5,118 232 4.75 398 5.85 0.0877
2021-05-14 2021-03-31 13F MERCK Common Stock 58933Y105 4,886 -5,260 -51.84 376 -54.70 0.1240
2021-01-28 2020-12-31 13F MERCK Common Stock 58933Y105 10,146 3,837 60.82 830 58.70 0.2405
2020-11-12 2020-09-30 13F MERCK Common Stock 58933Y105 6,309 -4,953 -43.98 523 -39.95 0.1748
2020-08-13 2020-06-30 13F/A-1 MERCK Common Stock 58933Y105 11,262 5,188 85.41 871 86.51 0.2794
2020-08-11 2020-06-30 13F MERCK & COMPANY. Equity 58933Y105 5,757 -317 445 571,575.3645
2020-04-17 2020-03-31 13F MERCK Common Stock 58933Y105 6,074 6,074 467 0.2059
2020-02-13 2019-12-31 13F MERCK COM 58933Y105 0 -6,679 -100.00 0 -100.00
2019-10-23 2019-09-30 13F MERCK COM 58933Y105 6,679 563 9.21 562 9.77 0.1854
2019-08-09 2019-06-30 13F MERCK COM 58933Y105 6,116 393 6.87 512 7.56 0.1624
2019-05-14 2019-03-31 13F MERCK COM 58933Y105 5,723 5,723 476 0.1590
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
(%)
2020-11-12 2020-09-30 13F CALL 8 MERCK Listed Options Call 0 -100.00 0 n/a n/a n/a
2020-08-13 2020-06-30 13F/A CALL 8 MERCK Listed Options Call 9 0 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.