Merck & Co., Inc.
MX ˙ BMV ˙ US58933Y1055
SecurityMX:MRK / Merck & Co., Inc.
InstitutionCompagnie Lombard Odier SCmA
Latest Disclosed Ownership792,577 shares
Latest Disclosed Value $ 95,339,096
Compagnie Lombard Odier SCmA ownership in MRK / Merck & Co., Inc.

On April 15, 2026 - Compagnie Lombard Odier SCmA filed a 13F-HR form disclosing ownership of 792,577 shares of Merck & Co., Inc. (MX:MRK) valued at $95,339,096 USD as of March 31, 2026. The entity filed a previous 13F-HR on January 16, 2026 disclosing 827,676 shares of Merck & Co., Inc.. This represents a change in shares of -4.24% during the quarter.

Compagnie Lombard Odier SCmA 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)
2026-04-15 2026-03-31 13F MERCK COM 58933Y105 792,577 -35,099 -4.24 95,339 9.43 1.1720
2026-01-16 2025-12-31 13F MERCK COM 58933Y105 827,676 134,772 19.45 87,121 49.81 0.9472
2025-11-06 2025-09-30 13F MERCK COM 58933Y105 692,904 -1,405 -0.20 58,155 5.81 0.6417
2025-07-15 2025-06-30 13F MERCK COM 58933Y105 694,309 -111,246 -13.81 54,962 -23.99 0.7246
2025-04-16 2025-03-31 13F MERCK COM 58933Y105 805,555 -647,936 -44.58 72,307 -49.99 0.8869
2025-01-30 2024-12-31 13F MERCK COM 58933Y105 1,453,491 -21,053 -1.43 144,593 -13.65 2.1317
2024-10-11 2024-09-30 13F MERCK COM 58933Y105 1,474,544 505,630 52.19 167,449 39.60 2.6024
2024-07-18 2024-06-30 13F MERCK COM 58933Y105 968,914 104,006 12.03 119,952 5.11 2.0291
2024-05-01 2024-03-31 13F MERCK COM 58933Y105 864,908 165,131 23.60 114,125 49.59 2.0199
2024-01-16 2023-12-31 13F MERCK COM 58933Y105 699,777 63,591 10.00 76,290 16.48 1.4174
2023-10-23 2023-09-30 13F MERCK COM 58933Y105 636,186 40,212 6.75 65,495 -4.76 1.5144
2023-08-07 2023-06-30 13F MERCK COM 58933Y105 595,974 -22,460 -3.63 68,769 4.52 1.9261
2023-05-01 2023-03-31 13F MERCK COM 58933Y105 618,434 -110,948 -15.21 65,795 -18.69 1.6442
2023-02-14 2022-12-31 13F/A-1 MERCK COM 58933Y105 729,382 40,974 5.95 80,918 36.50 2.1657
2023-02-13 2022-12-31 13F MERCK COM 58933Y105 729,382 40,974 81 0.0014
2022-11-09 2022-09-30 13F MERCK COM 58933Y105 688,408 -60,471 -8.07 59,279 -13.17 1.7084
2022-08-11 2022-06-30 13F MERCK & CO. COM 58933Y105 748,879 -10,586 -1.39 68,274 9.56 1.7299
2022-04-27 2022-03-31 13F MERCK & CO. COM 58933Y105 759,465 -2,957 -0.39 62,316 6.66 1.3168
2022-02-09 2021-12-31 13F MERCK COM 58933Y105 762,422 -32,538 -4.09 58,423 -2.18 1.1571
2021-10-28 2021-09-30 13F MERCK COM 58933Y105 794,960 -26,397 -3.21 59,726 -6.49 1.2900
2021-07-15 2021-06-30 13F MERCK COM 58933Y105 821,357 -27,404 -3.23 63,870 -2.40 1.4042
2021-04-23 2021-03-31 13F MERCK & CO. COM 58933Y105 848,761 84,660 11.08 65,440 4.69 1.4427
2021-02-09 2020-12-31 13F MERCK & CO. COM 58933Y105 764,101 9,447 1.25 62,506 -0.13 1.6081
2020-11-12 2020-09-30 13F MERCK & CO. COM 58933Y105 754,654 110,185 17.10 62,589 25.57 1.8675
2020-08-14 2020-06-30 13F MERCK & CO. COM 58933Y105 644,469 71,549 12.49 49,845 13.09 1.6723
2020-05-13 2020-03-31 13F MERCK & CO. COM 58933Y105 572,920 27,743 5.09 44,076 -11.10 1.8495
2020-02-13 2019-12-31 13F MERCK COM 58933Y105 545,177 51,539 10.44 49,579 19.32 1.8985
2019-11-12 2019-09-30 13F MERCK COM 58933Y105 493,638 90,273 22.38 41,550 22.81 1.7350
2019-08-14 2019-06-30 13F MERCK COM 58933Y105 403,365 -8,358 -2.03 33,832 -1.19 1.3721
2019-05-13 2019-03-31 13F MERCK COM 58933Y105 411,723 5,697 1.40 34,241 10.38 1.4132
2019-02-13 2018-12-31 13F MERCK COM 58933Y105 406,026 -15,808 -3.75 31,020 3.66 1.2711
2018-11-13 2018-09-30 13F MERCK COM 58933Y105 421,834 -17,215 -3.92 29,924 12.28 1.0482
2018-08-10 2018-06-30 13F MERCK COM 58933Y105 439,049 21,577 5.17 26,651 17.22 0.9783
2018-05-11 2018-03-31 13F MERCK COM 58933Y105 417,472 -13,114 -3.05 22,736 -6.16 0.8284
2018-02-16 2017-12-31 13F/A-1 MERCK COM 58933Y105 430,586 -18,014 -4.02 24,229 -15.62 0.8774
2018-02-13 2017-12-31 13F MERCK COM 58933Y105 430,586 -18,014 24,229
2017-11-14 2017-09-30 13F MERCK COM 58933Y105 448,600 -104,798 -18.94 28,714 -19.02 1.0184
2017-08-14 2017-06-30 13F MERCK COM 58933Y105 553,398 -13,040 -2.30 35,460 -1.48 1.2284
2017-05-15 2017-03-31 13F MERCK COM 58933Y105 566,438 -101,337 -15.18 35,991 -8.46 1.2156
2017-02-14 2016-12-31 13F MERCK COM 58933Y105 667,775 -114,340 -14.62 39,317 -19.45 1.1505
2016-11-14 2016-09-30 13F MERCK COM 58933Y105 782,115 -36,082 -4.41 48,813 3.56 1.4245
2016-08-15 2016-06-30 13F MERCK COM 58933Y105 818,197 -109,466 -11.80 47,134 -3.96 1.3699
2016-05-17 2016-03-31 13F MERCK & CO INC COM 58933Y105 927,663 -272,514 -22.71 49,077 -22.57 1.5026
2016-02-26 2015-12-31 13F/A-1 MERCK & CO INC COM 58933Y105 1,200,177 -15,188 -1.25 63,386 5.60 1.9927
2016-02-16 2015-12-31 13F MERCK & CO INC COM 58933Y105 1,200,177 63,386
2015-11-13 2015-09-30 13F MERCK & CO INC COM 58933Y105 1,215,365 67,964 5.92 60,027 -8.11 2.4445
2015-08-14 2015-06-30 13F MERCK & CO INC COM 58933Y105 1,147,401 -44,667 -3.75 65,324 -4.64 2.4279
2015-05-13 2015-03-31 13F MERCK & CO INC COM 58933Y105 1,192,068 226,630 23.47 68,500 24.93 2.5778
2015-02-13 2014-12-31 13F MERCK & CO INC COM 58933Y105 965,438 207,485 27.37 54,830 22.03 2.5282
2014-11-14 2014-09-30 13F MERCK & CO INC COM 58933Y105 757,953 7,633 1.02 44,932 3.52 1.8133
2014-08-14 2014-06-30 13F MERCK & CO INC COM 58933Y105 750,320 65,288 9.53 43,405 11.61 1.7241
2014-08-14 2014-03-31 13F MERCK & CO INC COM 58933Y105 685,032 156,333 29.57 38,890 46.98 1.6136
2014-08-14 2013-12-31 13F MERCK & CO INC COM 58933Y105 528,699 528,699 26,460 1.1143
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
(%)
2021-07-15 2021-06-30 13F MERCK PUT Put 0 0 n/a n/a n/a
2020-08-14 2020-06-30 13F MERCK & CO. PUT Put 0 0 n/a n/a n/a
2019-11-12 2019-09-30 13F MERCK PUT Put 0 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.