Merck & Co., Inc.
MX ˙ BMV ˙ US58933Y1055
SecurityMX:MRK / Merck & Co., Inc.
InstitutionCoastal Bridge Advisors, LLC
Latest Disclosed Ownership21,049 shares
Latest Disclosed Value $ 2,531,895
Coastal Bridge Advisors, LLC reports 21.46% decrease in ownership of MRK / Merck & Co., Inc.

On May 14, 2026 - Coastal Bridge Advisors, LLC filed a 13F-HR form disclosing ownership of 21,049 shares of Merck & Co., Inc. (MX:MRK) valued at $2,531,895 USD as of March 31, 2026. The entity filed a previous 13F-HR on February 17, 2026 disclosing 26,800 shares of Merck & Co., Inc.. This represents a change in shares of -21.46% 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)
2026-05-14 2026-03-31 13F MERCK COM 58933Y105 21,049 -5,751 -21.46 2,532 -10.25 0.1789
2026-02-17 2025-12-31 13F MERCK COM 58933Y105 26,800 -2,090 -7.23 2,821 16.34 0.2102
2025-11-03 2025-09-30 13F MERCK COM 58933Y105 28,890 970 3.47 2,425 9.68 0.1836
2025-08-14 2025-06-30 13F MERCK COM 58933Y105 27,920 -23,917 -46.14 2,210 -52.49 0.1821
2025-08-25 2025-03-31 13F/A-1 MERCK COM 58933Y105 51,837 41,410 397.14 4,653 348.60 0.6648
2025-05-08 2025-03-31 13F MERCK COM 58933Y105 10,705 278 961 0.2453
2025-02-14 2024-12-31 13F MERCK COM 58933Y105 10,427 690 7.09 1,037 -6.15 0.2611
2024-11-14 2024-09-30 13F MERCK COM 58933Y105 9,737 21 0.22 1,106 -8.07 0.2740
2024-08-16 2024-06-30 13F MERCK COM 58933Y105 9,716 -1,380 -12.44 1,203 -17.90 0.2988
2024-05-15 2024-03-31 13F MERCK COM 58933Y105 11,096 22 0.20 1,464 21.29 0.3370
2024-02-15 2023-12-31 13F MERCK COM 58933Y105 11,074 24 0.22 1,207 6.16 0.3093
2023-11-14 2023-09-30 13F MERCK COM 58933Y105 11,050 322 3.00 1,138 -8.08 0.3050
2023-08-17 2023-06-30 13F/A-1 MERCK COM 58933Y105 10,728 193 1.83 1,238 10.45 0.3034
2023-08-14 2023-06-30 13F MERCK COM 58933Y105 10,535 1,121
2023-05-15 2023-03-31 13F MERCK COM 58933Y105 10,535 19 0.18 1,121 -3.95 0.2833
2023-02-08 2022-12-31 13F MERCK COM 58933Y105 10,516 25 0.24 1,167 29.13 0.3311
2022-11-15 2022-09-30 13F MERCK COM 58933Y105 10,491 24 0.23 903 -5.35 0.2429
2022-11-15 2022-06-30 13F/A-1 MERCK COM 58933Y105 10,467 26 0.25 954 11.32 0.2935
2022-08-05 2022-06-30 13F MERCK COM 58933Y105 11,130 689 1,015 0.3066
2022-05-13 2022-03-31 13F MERCK COM 58933Y105 10,441 9 0.09 857 7.13 0.1973
2022-05-20 2021-12-31 13F/A-1 MERCK COM 58933Y105 10,432 25 0.24 800 2.30 0.1666
2022-02-14 2021-12-31 13F MERCK COM 58933Y105 13,329 2,922 1,022 0.2237
2022-05-20 2021-09-30 13F/A-1 MERCK COM 58933Y105 10,407 99 0.96 782 -2.49 0.1808
2021-11-15 2021-09-30 13F MERCK COM 58933Y105 13,237 2,929 994 0.2137
2021-08-10 2021-06-30 13F MERCK COM 58933Y105 10,308 -511 -4.72 802 -3.84 0.1644
2021-05-17 2021-03-31 13F MERCK & CO. COM 58933Y105 10,819 2,464 29.49 834 22.11 0.1528
2021-02-16 2020-12-31 13F MERCK & CO. COM 58933Y105 8,355 108 1.31 683 -0.15 0.1357
2020-11-13 2020-09-30 13F MERCK & CO. COM 58933Y105 8,247 23 0.28 684 7.55 0.2086
2020-08-11 2020-06-30 13F MERCK & CO. COM 58933Y105 8,224 24 0.29 636 0.79 0.2029
2020-05-14 2020-03-31 13F MERCK & CO. COM 58933Y105 8,200 187 2.33 631 -13.44 0.2316
2020-02-13 2019-12-31 13F MERCK COM 58933Y105 8,013 -54 -0.67 729 7.36 0.1892
2019-11-08 2019-09-30 13F MERCK COM 58933Y105 8,067 93 1.17 679 1.49 0.2319
2019-08-13 2019-06-30 13F/A-1 MERCK COM 58933Y105 7,974 -111 -1.37 669 -0.45 0.1980
2019-08-07 2019-06-30 13F MERCK COM 58933Y105 6,270 -1,815 678 0.2032
2019-05-08 2019-03-31 13F MERCK COM 58933Y105 8,085 519 6.86 672 16.26 0.2347
2019-02-08 2018-12-31 13F MERCK COM 58933Y105 7,566 19 0.25 578 8.04 0.2282
2018-11-08 2018-09-30 13F MERCK COM 58933Y105 7,547 -71 -0.93 535 15.80 0.2039
2018-08-03 2018-06-30 13F MERCK COM 58933Y105 7,618 175 2.35 462 14.07 0.1860
2018-05-11 2018-03-31 13F MERCK COM 58933Y105 7,443 118 1.61 405 -1.70 0.1470
2018-02-09 2017-12-31 13F MERCK COM 58933Y105 7,325 21 0.29 412 -11.97 0.1316
2017-11-13 2017-09-30 13F MERCK COM 58933Y105 7,304 20 0.27 468 0.21 0.1533
2017-08-03 2017-06-30 13F MERCK COM 58933Y105 7,284 -84 -1.14 467 -0.21 0.1571
2017-08-14 2017-03-31 13F/A-1 MERCK COM 58933Y105 7,368 22 0.30 468 8.33 0.1595
2017-05-04 2017-03-31 13F MERCK COM 58933Y105 7,368 22 468 0.1544
2017-02-10 2016-12-31 13F MERCK COM 58933Y105 7,346 41 0.56 432 -5.26 0.1681
2016-11-09 2016-09-30 13F MERCK COM 58933Y105 7,305 23 0.32 456 8.57 0.2220
2016-08-15 2016-06-30 13F MERCK COM 58933Y105 7,282 -187 -2.50 420 6.33 0.2194
2016-05-16 2016-03-31 13F MERCK & CO INC COM 58933Y105 7,469 24 0.32 395 0.51 0.2759
2016-02-09 2015-12-31 13F MERCK & CO INC COM 58933Y105 7,445 7,445 393 0.2193
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.