Merck & Co., Inc.
MX ˙ BMV ˙ US58933Y1055
SecurityMX:MRK / Merck & Co., Inc.
InstitutionScotia Capital Inc.
Latest Disclosed Ownership202,667 shares
Latest Disclosed Value $ 24,378,828
Scotia Capital Inc. ownership in MRK / Merck & Co., Inc.

On May 13, 2026 - Scotia Capital Inc. filed a 13F-HR form disclosing ownership of 202,667 shares of Merck & Co., Inc. (MX:MRK) valued at $24,378,828 USD as of March 31, 2026. The entity filed a previous 13F-HR on February 12, 2026 disclosing 195,731 shares of Merck & Co., Inc.. This represents a change in shares of 3.54% during the quarter.

Scotia Capital 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 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.

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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)
2026-05-13 2026-03-31 13F MERCK COM 58933Y105 202,667 6,936 3.54 24,379 18.33 0.1002
2026-02-12 2025-12-31 13F MERCK COM 58933Y105 195,731 -22,063 -10.13 20,602 12.71 0.0830
2025-11-14 2025-09-30 13F MERCK COM 58933Y105 217,794 -23,892 -9.89 18,280 -4.45 0.0777
2025-08-13 2025-06-30 13F MERCK COM 58933Y105 241,686 -42,380 -14.92 19,132 -24.97 0.0904
2025-05-09 2025-03-31 13F MERCK COM 58933Y105 284,066 -32,485 -10.26 25,498 -19.03 0.1367
2025-02-13 2024-12-31 13F MERCK COM 58933Y105 316,551 -232 -0.07 31,491 -12.46 0.1659
2024-11-13 2024-09-30 13F MERCK COM 58933Y105 316,783 33,000 11.63 35,974 2.40 0.1926
2024-08-14 2024-06-30 13F MERCK COM 58933Y105 283,783 26,827 10.44 35,132 3.62 0.2058
2024-05-14 2024-03-31 13F MERCK COM 58933Y105 256,956 1,254 0.49 33,905 21.63 0.2017
2024-02-12 2023-12-31 13F MERCK COM 58933Y105 255,702 1,216 0.48 27,876 6.40 0.1797
2023-11-14 2023-09-30 13F MERCK COM 58933Y105 254,486 -97,266 -27.65 26,200 -35.45 0.1895
2023-08-03 2023-06-30 13F MERCK COM 58933Y105 351,752 -28,157 -7.41 40,589 0.42 0.2786
2023-05-11 2023-03-31 13F MERCK COM 58933Y105 379,909 -42,210 -10.00 40,420 -13.70 0.2951
2023-02-09 2022-12-31 13F MERCK COM 58933Y105 422,119 14,763 3.62 46,835 33.50 0.3600
2022-11-10 2022-09-30 13F MERCK COM 58933Y105 407,356 -2,779 -0.68 35,082 -6.18 0.2838
2022-08-05 2022-06-30 13F MERCK COM 58933Y105 410,135 1,726 0.42 37,392 11.58 0.2782
2022-05-09 2022-03-31 13F MERCK COM 58933Y105 408,409 6,257 1.56 33,510 8.73 0.2118
2022-02-11 2021-12-31 13F MERCK COM 58933Y105 402,152 -1,102 -0.27 30,820 1.76 0.2021
2021-11-12 2021-09-30 13F MERCK COM 58933Y105 403,254 -20,025 -4.73 30,288 -7.99 0.2204
2021-08-12 2021-06-30 13F MERCK COM 58933Y105 423,279 51,610 13.89 32,919 14.89 0.2409
2021-05-06 2021-03-31 13F MERCK & CO. COM 58933Y105 371,669 144,053 63.29 28,652 53.89 0.2325
2021-02-11 2020-12-31 13F MERCK & CO. COM 58933Y105 227,616 -26,308 -10.36 18,619 -11.60 0.1710
2020-11-12 2020-09-30 13F MERCK & CO. COM 58933Y105 253,924 -4,195 -1.63 21,063 5.45 0.2281
2020-08-11 2020-06-30 13F MERCK & CO. COM 58933Y105 258,119 35,896 16.15 19,974 16.82 0.2794
2020-05-15 2020-03-31 13F MERCK & CO. COM 58933Y105 222,223 9,790 4.61 17,098 -11.51 0.2382
2020-02-13 2019-12-31 13F MERCK COM 58933Y105 212,433 16,773 8.57 19,322 17.31 0.2148
2019-11-14 2019-09-30 13F MERCK COM 58933Y105 195,660 34,836 21.66 16,471 22.13 0.1941
2019-08-13 2019-06-30 13F MERCK COM 58933Y105 160,824 -3,334 -2.03 13,486 -1.21 0.1643
2019-05-15 2019-03-31 13F MERCK COM 58933Y105 164,158 -8,433 -4.89 13,651 3.52 0.1757
2019-02-11 2018-12-31 13F/A-1 MERCK COM 58933Y105 172,591 339 0.20 13,187 7.91 0.1950
2019-02-11 2018-12-31 13F MERCK COM 58933Y105 172,252 12,220
2018-11-14 2018-09-30 13F MERCK COM 58933Y105 172,252 -10,715 -5.86 12,220 23.60 0.1548
2018-08-13 2018-06-30 13F MERCK COM 58933Y105 182,967 4,084 2.28 9,887 1.49 0.1377
2018-05-15 2018-03-31 13F MERCK COM 58933Y105 178,883 9,136 5.38 9,742 1.98 0.1344
2018-02-13 2017-12-31 13F MERCK COM 58933Y105 169,747 -1,084 -0.63 9,553 -12.65 0.1274
2017-11-14 2017-09-30 13F MERCK COM 58933Y105 170,831 -2,853 -1.64 10,936 -1.74 0.1557
2017-08-15 2017-06-30 13F MERCK COM 58933Y105 173,684 28,654 19.76 11,130 20.62 0.1878
2017-05-15 2017-03-31 13F MERCK COM 58933Y105 145,030 1,837 1.28 9,227 9.34 0.1576
2017-02-14 2016-12-31 13F MERCK COM 58933Y105 143,193 -2,452 -1.68 8,439 -7.14 0.1347
2016-11-14 2016-09-30 13F MERCK COM 58933Y105 145,645 -16,086 -9.95 9,088 -2.67 0.1667
2016-08-11 2016-06-30 13F MERCK COM 58933Y105 161,731 -9,967 -5.80 9,337 2.73 0.1895
2016-05-12 2016-03-31 13F MERCK & CO INC COM 58933Y105 171,698 17,407 11.28 9,089 18.72 0.1986
2016-02-11 2015-12-31 13F MERCK & CO INC COM 58933Y105 154,291 32,340 26.52 7,656 26.88 0.1736
2015-11-13 2015-09-30 13F MERCK & CO INC COM 58933Y105 121,951 -84,518 -40.93 6,034 -48.73 0.1365
2015-08-13 2015-06-30 13F MERCK & CO INC COM 58933Y105 206,469 108,914 111.64 11,769 109.82 0.2363
2015-05-15 2015-03-31 13F MERCK & CO INC COM 58933Y105 97,555 -7,066 -6.75 5,609 -5.48 0.1447
2015-02-13 2014-12-31 13F MERCK & CO INC COM 58933Y105 104,621 -1,646 -1.55 5,934 -5.73 0.1555
2014-11-14 2014-09-30 13F MERCK & CO INC COM 58933Y105 106,267 -62,212 -36.93 6,295 -35.43 0.1345
2014-08-14 2014-06-30 13F MERCK & CO INC COM 58933Y105 168,479 36,217 27.38 9,749 29.88 0.2107
2014-05-14 2014-03-31 13F MERCK & CO INC COM 58933Y105 132,262 26,291 24.81 7,506 41.49 0.1671
2014-02-14 2013-12-31 13F MERCK & CO INC COM 58933Y105 105,971 -55,738 -34.47 5,305 -31.09 0.1265
2013-11-14 2013-09-30 13F MERCK & CO INC COM 58933Y105 161,709 -16,357 -9.19 7,699 -6.80 0.2062
2013-08-13 2013-06-30 13F MERCK & CO INC COM 58933Y105 178,066 178,066 8,261 0.3189
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
(%)
2016-05-12 2016-03-31 13F MERCK & CO INC COM Call 0 -100.00 0 -100.00 n/a n/a n/a
2016-02-11 2015-12-31 13F MERCK & CO INC COM Call 98,000 40.00 5,175 49.78 n/a n/a n/a
2015-11-13 2015-09-30 13F MERCK & CO INC COM Call 70,000 -65.16 3,455 -69.78 n/a n/a n/a
2015-08-13 2015-06-30 13F MERCK & CO INC COM Call 200,900 11,431 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
(%)
2016-05-12 2016-03-31 13F MERCK & CO INC COM Put 0 0 n/a n/a n/a
2016-02-11 2015-12-31 13F MERCK & CO INC COM Put 0 0 n/a n/a n/a
2015-11-13 2015-09-30 13F MERCK & CO INC COM Put 0 -100.00 0 -100.00 n/a n/a n/a
2015-08-13 2015-06-30 13F MERCK & CO INC COM Put 200,000 11,380 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.