Merck & Co., Inc.
MX ˙ BMV ˙ US58933Y1055
SecurityMX:MRK / Merck & Co., Inc.
InstitutionDeltec Asset Management Llc
Latest Disclosed Ownership1,851 shares
Latest Disclosed Value $ 222,657
Deltec Asset Management Llc ownership in MRK / Merck & Co., Inc.

On April 24, 2026 - Deltec Asset Management Llc filed a 13F-HR form disclosing ownership of 1,851 shares of Merck & Co., Inc. (MX:MRK) valued at $222,657 USD as of March 31, 2026. The entity filed a previous 13F-HR on April 22, 2025 disclosing 0 shares of Merck & Co., Inc..

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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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)
2026-04-24 2026-03-31 13F MERCK COM 58933Y105 1,851 1,851 223 0.0408
2025-04-22 2025-03-31 13F MERCK COM 58933Y105 0 -100.00 0
2025-01-27 2024-12-31 13F MERCK COM 58933Y105 2,198 0 0.00 219 -12.45 0.0433
2024-10-25 2024-09-30 13F MERCK COM 58933Y105 2,198 0 0.00 250 -8.46 0.0492
2024-07-16 2024-06-30 13F MERCK COM 58933Y105 2,198 0 0.00 272 -6.21 0.0520
2024-04-17 2024-03-31 13F MERCK COM 58933Y105 2,198 0 0.00 290 21.34 0.0572
2024-01-22 2023-12-31 13F MERCK COM 58933Y105 2,198 -50 -2.22 240 3.46 0.0539
2023-10-23 2023-09-30 13F MERCK COM 58933Y105 2,248 -279 -11.04 231 -20.62 0.0527
2023-07-18 2023-06-30 13F MERCK COM 58933Y105 2,527 -2,542 -50.15 292 -46.01 0.0637
2023-04-17 2023-03-31 13F MERCK COM 58933Y105 5,069 0 0.00 539 -4.09 0.1332
2023-01-25 2022-12-31 13F MERCK COM 58933Y105 5,069 0 0.00 562 28.60 0.1610
2022-10-26 2022-09-30 13F MERCK COM 58933Y105 5,069 0 0.00 437 -5.41 0.1073
2022-07-18 2022-06-30 13F MERCK COM 58933Y105 5,069 -2,000 -28.29 462 -20.34 0.1083
2022-04-11 2022-03-31 13F MERCK COM 58933Y105 7,069 -865 -10.90 580 -4.61 0.0991
2022-01-25 2021-12-31 13F MERCK COM 58933Y105 7,934 -4,000 -33.52 608 -32.14 0.0990
2021-10-13 2021-09-30 13F MERCK COM 58933Y105 11,934 7,000 141.87 896 133.33 0.1352
2021-07-15 2021-06-30 13F MERCK COM 58933Y105 4,934 0 0.00 384 1.05 0.0528
2021-04-21 2021-03-31 13F MERCK & CO. COM 58933Y105 4,934 0 0.00 380 -5.94 0.0566
2021-01-20 2020-12-31 13F MERCK & CO. COM 58933Y105 4,934 -16,000 -76.43 404 -76.73 0.0618
2020-10-23 2020-09-30 13F MERCK & CO. COM 58933Y105 20,934 0 0.00 1,736 7.23 0.3105
2020-07-29 2020-06-30 13F MERCK & CO. COM 58933Y105 20,934 8,500 68.36 1,619 69.17 0.3389
2020-04-22 2020-03-31 13F MERCK & CO. COM 58933Y105 12,434 5,500 79.32 957 51.66 0.2646
2020-01-27 2019-12-31 13F MERCK COM 58933Y105 6,934 0 0.00 631 8.05 0.1279
2019-10-24 2019-09-30 13F MERCK COM 58933Y105 6,934 0 0.00 584 0.52 0.1468
2019-07-29 2019-06-30 13F MERCK COM 58933Y105 6,934 0 0.00 581 0.69 0.1273
2019-04-22 2019-03-31 13F MERCK COM 58933Y105 6,934 0 0.00 577 8.87 0.1262
2019-01-23 2018-12-31 13F MERCK COM 58933Y105 6,934 0 0.00 530 7.72 0.1463
2018-10-18 2018-09-30 13F MERCK COM 58933Y105 6,934 0 0.00 492 16.86 0.0946
2018-08-07 2018-06-30 13F MERCK COM 58933Y105 6,934 -13,400 -65.90 421 -62.00 0.0851
2018-05-11 2018-03-31 13F MERCK COM 58933Y105 20,334 20,334 1,108 0.2213
2016-04-27 2016-03-31 13F MERCK & CO INC COM 58933Y105 0 0 0 0.0000
2016-01-27 2015-12-31 13F MERCK & CO INC COM 58933Y105 0 0 0 0.0000
2015-10-29 2015-09-30 13F MERCK & CO INC COM 58933Y105 0 -3,975 -100.00 0 -100.00
2015-08-04 2015-06-30 13F MERCK & CO INC COM 58933Y105 3,975 0 0.00 226 -0.88 0.0497
2015-05-01 2015-03-31 13F MERCK & CO INC COM 58933Y105 3,975 3,975 228 0.0497
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.