Merck & Co., Inc.
MX ˙ BMV ˙ US58933Y1055
SecurityMX:MRK / Merck & Co., Inc.
InstitutionItau Unibanco Holding S.A.
Latest Disclosed Ownership636 shares
Latest Disclosed Value $ 76,504
Itau Unibanco Holding S.A. reports 98.92% decrease in ownership of MRK / Merck & Co., Inc.

On May 15, 2026 - Itau Unibanco Holding S.A. filed a 13F-HR/A form disclosing ownership of 636 shares of Merck & Co., Inc. (MX:MRK) valued at $76,504 USD as of March 31, 2026. The entity filed a previous 13F-HR on February 13, 2026 disclosing 58,694 shares of Merck & Co., Inc.. This represents a change in shares of -98.92% during the quarter.

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)
2026-05-15 2026-03-31 13F/A-1 MERCK COM 58933Y105 636 -58,058 -98.92 77 -98.78 0.0014
2026-05-14 2026-03-31 13F MERCK COM 58933Y105 58,694 0 6,225 0.1179
2026-02-13 2025-12-31 13F MERCK COM 58933Y105 58,694 58,267 13,645.67 6,225 17,682.86 0.1492
2025-11-12 2025-09-30 13F MERCK COM 58933Y105 427 -4 -0.93 36 2.94 0.0012
2025-08-08 2025-06-30 13F MERCK COM 58933Y105 431 -4 -0.92 34 0.0013
2025-05-14 2025-03-31 13F MERCK COM 58933Y105 435 0 0.00 0 -100.00 0.0015
2025-02-14 2024-12-31 13F MERCK COM 58933Y105 435 -76 -14.87 43 -25.86 0.0013
2024-11-14 2024-09-30 13F MERCK COM 58933Y105 511 198 63.26 58 52.63 0.0019
2024-08-13 2024-06-30 13F MERCK COM 58933Y105 313 313 39 0.0016
2024-05-14 2024-03-31 13F MERCK COM 58933Y105 0 -594 -100.00 0 -100.00
2024-02-14 2023-12-31 13F MERCK COM 58933Y105 594 40 7.22 65 12.28 0.0021
2023-11-14 2023-09-30 13F MERCK COM 58933Y105 554 -3 -0.54 57 -10.94 0.0025
2023-08-14 2023-06-30 13F MERCK COM 58933Y105 557 -2 -0.36 64 8.47 0.0030
2023-05-12 2023-03-31 13F MERCK COM 58933Y105 559 -4,518 -88.99 59 -89.50 0.0030
2023-02-09 2022-12-31 13F MERCK COM 58933Y105 5,077 -870 -14.63 563 9.77 0.0229
2022-11-14 2022-09-30 13F MERCK COM 58933Y105 5,947 -42,487 -87.72 512 -88.41 0.0206
2022-08-15 2022-06-30 13F MERCK COM 58933Y105 48,434 45,543 1,575.34 4,416 1,763.29 0.1544
2022-05-16 2022-03-31 13F MERCK COM 58933Y105 2,891 -100 -3.34 237 2.60 0.0066
2022-02-14 2021-12-31 13F MERCK COM 58933Y105 2,991 2,248 302.56 231 312.50 0.0069
2021-11-12 2021-09-30 13F MERCK COM 58933Y105 743 264 55.11 56 51.35 0.0030
2021-08-17 2021-06-30 13F MERCK COM 58933Y105 479 479 37 0.0018
2020-08-14 2020-06-30 13F MERCK COM 58933Y105 0 -1,361 -100.00 0 -100.00
2020-05-15 2020-03-31 13F MERCK COM 58933Y105 1,361 -3,089 -69.42 105 -74.07 0.0082
2020-02-14 2019-12-31 13F MERCK COM 58933Y105 4,450 4,450 226.97 405 285.71 0.0206
2019-11-14 2019-09-30 13F MERCK COM 58933Y105 0 -9,897 -100.00 0 -100.00
2019-08-14 2019-06-30 13F MERCK COM 58933Y105 9,897 7,156 261.07 830 300.97 0.0392
2019-05-15 2019-03-31 13F MERCK COM 58933Y105 2,741 0 0.00 207 0.00 0.0094
2019-02-13 2018-12-31 13F MERCK COM 58933Y105 2,741 2,741 0.00 207 0.00 0.0094
2018-11-13 2018-09-30 13F MERCK COM 58933Y105 0 -4,623 -100.00 0 -100.00
2018-08-10 2018-06-30 13F MERCK COM 58933Y105 4,623 -25,039 -84.41 281 -82.61 0.0297
2018-05-14 2018-03-31 13F MERCK COM 58933Y105 29,662 2,408 8.84 1,616 5.35 0.0105
2018-02-09 2017-12-31 13F MERCK COM 58933Y105 27,254 16,444 152.12 1,534 -29.92 0.0915
2017-11-14 2017-09-30 13F MERCK COM 58933Y105 10,810 9,610 800.83 2,189 2,742.86 0.1492
2017-08-14 2017-06-30 13F MERCK COM 58933Y105 1,200 1,200 -88.90 77 -96.48 0.0090
2017-02-14 2016-12-31 13F AVERY DENNISON COM 58933Y105 0 -490 -100.00 0 -100.00
2016-11-21 2016-09-30 13F/A-1 MERCK COM 58933Y105 490 490 31 0.0035
2016-11-14 2016-09-30 13F AVERY DENNISON COM 58933Y105 490 31 0.0035
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.