Merck & Co., Inc.
MX ˙ BMV ˙ US58933Y1055
SecurityMX:MRK / Merck & Co., Inc.
InstitutionBraun-Bostich & Associates Inc.
Latest Disclosed Ownership3,254 shares
Latest Disclosed Value $ 391,424
Braun-Bostich & Associates Inc. reports 4.49% decrease in ownership of MRK / Merck & Co., Inc.

On April 15, 2026 - Braun-Bostich & Associates Inc. filed a 13F-HR form disclosing ownership of 3,254 shares of Merck & Co., Inc. (MX:MRK) valued at $391,424 USD as of March 31, 2026. The entity filed a previous 13F-HR on January 14, 2026 disclosing 3,407 shares of Merck & Co., Inc.. This represents a change in shares of -4.49% 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.

Upgrade to unlock premium data and export to Excel .

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 3,254 -153 -4.49 391 9.22 0.2452
2026-01-14 2025-12-31 13F MERCK COM 58933Y105 3,407 312 10.08 359 38.22 0.2214
2025-11-03 2025-09-30 13F MERCK COM 58933Y105 3,095 204 7.06 260 13.60 0.1636
2025-07-08 2025-06-30 13F MERCK COM 58933Y105 2,891 5 0.17 229 -11.97 0.1562
2025-04-15 2025-03-31 13F MERCK COM 58933Y105 2,886 6 0.21 259 -9.44 0.1917
2025-01-17 2024-12-31 13F MERCK COM 58933Y105 2,880 -176 -5.76 287 -17.58 0.2065
2024-10-15 2024-09-30 13F MERCK COM 58933Y105 3,056 -259 -7.81 347 -15.37 0.2419
2024-08-13 2024-06-30 13F MERCK COM 58933Y105 3,315 440 15.30 410 8.18 0.3051
2024-04-29 2024-03-31 13F MERCK COM 58933Y105 2,875 -331 -10.32 379 8.60 0.3176
2024-01-29 2023-12-31 13F MERCK COM 58933Y105 3,206 3,206 350 0.3156
2023-11-01 2023-09-30 13F MERCK COM 58933Y105 0 -2,864 -100.00 0 -100.00
2023-07-25 2023-06-30 13F MERCK COM 58933Y105 2,864 408 16.61 330 26.44 0.7077
2023-05-02 2023-03-31 13F MERCK COM 58933Y105 2,456 336 15.85 261 11.06 0.6182
2023-02-09 2022-12-31 13F MERCK COM 58933Y105 2,120 2,120 235 0.6791
2021-02-16 2020-12-31 13F MERCK & CO. INC COM Stock 58933Y105 0 -2,724 -100.00 0 -100.00
2020-10-09 2020-09-30 13F MERCK & CO. INC COM Stock 58933Y105 2,724 -3,071 -52.99 226 -49.55 0.2246
2020-08-13 2020-06-30 13F MERCK & CO. INC COM Stock 58933Y105 5,795 0 0.00 448 4.67 0.4373
2020-05-11 2020-03-31 13F MERCK & CO. INC COM Stock 58933Y105 5,795 -155 -2.61 428 -21.90 0.5452
2020-01-29 2019-12-31 13F MERCK & CO INC COM Stock 58933Y105 5,950 -130 -2.14 548 7.03 0.5395
2019-11-14 2019-09-30 13F MERCK & CO INC COM Stock 58933Y105 6,080 865 16.59 512 17.16 0.5951
2019-08-14 2019-06-30 13F MERCK & CO INC COM Stock 58933Y105 5,215 1,607 44.54 437 45.67 0.4568
2019-05-09 2019-03-31 13F MERCK & CO INC COM Stock 58933Y105 3,608 2,038 129.81 300 150.00 0.3123
2019-02-08 2018-12-31 13F MERCK & CO INC COM Stock 58933Y105 1,570 0 0.00 120 8.11 0.1273
2018-11-14 2018-09-30 13F MERCK & CO INC COM Stock 58933Y105 1,570 0 0.00 111 16.84 0.1070
2018-08-10 2018-06-30 13F MERCK & CO INC COM Stock 58933Y105 1,570 0 0.00 95 10.47 0.0950
2018-05-16 2018-03-31 13F MERCK & CO INC COM Stock 58933Y105 1,570 -853 -35.20 86 -36.76 0.0745
2018-05-21 2017-12-31 13F MERCK & CO INC COM Stock 58933Y105 2,423 2,423 136 0.1152
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.