Merck & Co., Inc.
US ˙ NYSE ˙ US58933Y1055

SecurityMRK / Merck & Co., Inc.
InstitutionIFP Advisors, Inc
Latest Disclosed Ownership29,693 shares
Latest Disclosed Value $ 3,571,771
IFP Advisors, Inc ownership in MRK / Merck & Co., Inc.

On April 13, 2026 - IFP Advisors, Inc filed a 13F-HR form disclosing ownership of 29,693 shares of Merck & Co., Inc. (US:MRK) valued at $3,571,771 USD as of March 31, 2026. The entity filed a previous 13F-HR on February 6, 2026 disclosing 28,036 shares of Merck & Co., Inc.. This represents a change in shares of 5.91% during the quarter. The current value of the position is $3,405,787 USD.

IFP Advisors, Inc 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.

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)
2026-04-13 2026-03-31 13F MERCK cs 58933Y105 29,693 1,657 5.91 3,572 21.01 0.0741
2026-02-06 2025-12-31 13F MERCK cs 58933Y105 28,036 -2,337 -7.69 2,951 15.77 0.0662
2026-02-06 2025-09-30 13F/A-1 MERCK cs 58933Y105 30,373 -624 -2.01 2,549 3.91 0.0662
2025-12-02 2025-09-30 13F MERCK cs 58933Y105 30,381 -616 2,550 0.0658
2025-07-24 2025-06-30 13F MERCK cs 58933Y105 30,997 1,833 6.29 2,454 -6.27 0.0698
2025-05-05 2025-03-31 13F MERCK cs 58933Y105 29,164 1,983 7.30 2,618 -3.18 0.0807
2025-02-04 2024-12-31 13F MERCK cs 58933Y105 27,181 2,741 11.22 2,704 -2.59 0.0885
2025-02-04 2024-09-30 13F MERCK cs 58933Y105 24,440 3,511 16.78 2,776 7.14 0.1000
2024-07-30 2024-06-30 13F MERCK cs 58933Y105 20,929 6,296 43.03 2,591 34.20 0.1028
2024-07-30 2024-03-31 13F MERCK cs 58933Y105 14,633 -199 -1.34 1,931 19.43 0.0847
2024-01-09 2023-12-31 13F MERCK cs 58933Y105 14,832 -4,788 -24.40 1,617 -19.96 0.0763
2023-10-12 2023-09-30 13F MERCK cs 58933Y105 19,620 -2,690 -12.06 2,020 -21.56 0.0908
2023-08-14 2023-06-30 13F/A-1 MERCK cs 58933Y105 22,310 -2,695 -10.78 2,574 70.01 0.1077
2023-08-04 2023-06-30 13F MERCK cs 58933Y105 22,310 -2,695 1,351 0.0625
2023-04-18 2023-03-31 13F MERCK cs 58933Y105 25,005 -32,768 -56.72 1,514 50,366.67 0.0659
2023-02-07 2022-12-31 13F MERCK cs 58933Y105 57,773 -3,805 -6.18 4 -99.92 0.0939
2022-11-08 2022-09-30 13F MERCK cs 58933Y105 61,578 6,847 12.51 3,744 12.40 0.0976
2022-09-06 2022-06-30 13F/A-1 MERCK cs 58933Y105 54,731 0 0.00 3,331 0.00 0.1068
2022-08-12 2022-06-30 13F MERCK CO INC COM Stock 58933Y105 67 -54,664 4 0.0072
2022-09-06 2022-03-31 13F/A-1 MERCK cs 58933Y105 54,731 25,394 86.56 3,331 48.04 0.1068
2022-08-08 2022-03-31 13F MERCK CO INC COM Stock 58933Y105 33,124 3,787 2,020 0.0412
2022-01-12 2021-12-31 13F MERCK CO INC COM Stock 58933Y105 29,337 -731 -2.43 2,250 -0.71 0.0440
2021-10-06 2021-09-30 13F MERCK CO INC COM Stock 58933Y105 30,068 5,072 20.29 2,266 16.21 0.0453
2021-07-13 2021-06-30 13F MERCK CO INC COM Stock 58933Y105 24,996 6,242 33.28 1,950 34.95 0.0404
2021-04-30 2021-03-31 13F MERCK CO. INC COM Stock 58933Y105 18,754 409 2.23 1,445 -3.60 0.0281
2021-01-25 2020-12-31 13F MERCK CO. INC COM Stock 58933Y105 18,345 -1,226 -6.26 1,499 -7.53 0.0608
2020-10-29 2020-09-30 13F MERCK CO. INC COM Stock 58933Y105 19,571 1,490 8.24 1,621 17.89 0.0968
2020-08-05 2020-06-30 13F MERCK CO. INC COM Stock 58933Y105 18,081 520 2.96 1,375 6.34 0.1090
2020-05-12 2020-03-31 13F MERCK CO. INC COM Stock 58933Y105 17,561 -1,321 -7.00 1,293 -24.83 0.1305
2020-01-17 2019-12-31 13F MERCK & CO INC COM Stock 58933Y105 18,882 -10,988 -36.79 1,720 -30.36 0.1293
2019-11-07 2019-09-30 13F MERCK & CO INC COM Stock 58933Y105 29,870 21,790 269.68 2,470 266.47 0.1655
2019-05-15 2019-03-31 13F MERCK & COMPANY INC Stock 58933Y105 8,080 -26,954 -76.94 674 -74.48 0.0920
2019-06-03 2018-12-31 13F/A-10 MERCK Stock 58933Y105 35,034 -12,714 -26.63 2,641 -22.03 0.1610
2019-01-23 2018-12-31 13F MERCK Stock 58933Y105 35,034 -12,714 2,641 0.1610
2019-06-03 2018-09-30 13F/A-9 MERCK Stock 58933Y105 47,748 -1,825 -3.68 3,387 12.56 0.1380
2018-10-25 2018-09-30 13F MERCK Stock 58933Y105 47,748 -1,825 3,387 0.1380
2019-06-03 2018-06-30 13F/A-8 MERCK Stock 58933Y105 49,573 -5,853 -10.56 3,009 -3.53 0.1265
2018-08-07 2018-06-30 13F MERCK Stock 58933Y105 49,573 -1,702 3,009
2019-06-03 2018-03-31 13F/A-7 MERCK & CO INC COM Stock 58933Y105 55,426 0 0.00 3,119 0.00 0.1414
2018-05-09 2018-03-31 13F MERCK Stock 58933Y105 51,275 -4,151 2,793
2019-06-03 2017-12-31 13F/A-6 MERCK & CO INC COM Stock 58933Y105 55,426 -36,503 -39.71 3,119 -47.01 0.1414
2018-01-24 2017-12-31 13F MERCK & CO INC COM Stock 58933Y105 55,426 -36,503 3,119
2017-10-30 2017-09-30 13F MERCK & CO INC COM Stock 58933Y105 91,929 4,971 5.72 5,886 5.62 0.2337
2019-06-03 2017-06-30 13F/A-5 MERCK & CO INC COM Stock 58933Y105 86,958 -1,520 -1.72 5,573 -0.87 0.2362
2017-07-31 2017-06-30 13F MERCK & CO INC COM Stock 58933Y105 86,958 -1,520 5,573
2019-06-03 2017-03-31 13F/A-4 MERCK & CO INC COM Stock 58933Y105 88,478 1,572 1.81 5,622 9.89 0.2449
2017-04-26 2017-03-31 13F MERCK & CO INC COM Stock 58933Y105 88,478 1,572 5,622
2019-06-03 2016-12-31 13F/A-3 MERCK & CO INC COM Stock 58933Y105 86,906 8,749 11.19 5,116 4.88 0.2469
2017-02-14 2016-12-31 13F MERCK & CO INC COM Stock 58933Y105 86,906 8,749 5,116
2016-11-04 2016-09-30 13F MERCK & CO INC COM Stock 58933Y105 78,157 -7,984 -9.27 4,878 -1.71 0.2536
2019-06-03 2016-06-30 13F/A-2 MERCK & CO INC COM Stock 58933Y105 86,141 78,061 966.10 4,963 636.35 0.2771
2016-08-22 2016-06-30 13F MERCK & CO INC COM Stock 58933Y105 86,141 78,061 4,963
2019-06-03 2016-03-31 13F/A-1 MERCK & COMPANY INC Stock 58933Y105 8,080 -70,809 -89.76 674 -83.83 0.0920
2016-05-02 2016-03-31 13F MERCK & CO INC NEW COM Stock 58933Y105 84,687 5,798 4,481
2016-02-11 2015-12-31 13F MERCK Stock 58933Y105 78,889 78,889 4,167 0.2797
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
(%)
2019-06-03 2017-12-31 13F/A MERCK & CO INC COM Stock Call 0 -100.00 0 -100.00 n/a n/a n/a
2017-10-30 2017-09-30 13F MERCK & CO INC COM Stock Call 33,200 2,125 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.