Merck & Co., Inc.
MX ˙ BMV ˙ US58933Y1055
SecurityMX:MRK / Merck & Co., Inc.
InstitutionHighland Capital Management, Llc
Latest Disclosed Ownership237,613 shares
Latest Disclosed Value $ 28,582,488
Highland Capital Management, Llc reports 8.92% decrease in ownership of MRK / Merck & Co., Inc.

On April 13, 2026 - Highland Capital Management, Llc filed a 13F-HR form disclosing ownership of 237,613 shares of Merck & Co., Inc. (MX:MRK) valued at $28,582,488 USD as of March 31, 2026. The entity filed a previous 13F-HR on February 2, 2026 disclosing 260,881 shares of Merck & Co., Inc.. This represents a change in shares of -8.92% 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)
2026-04-13 2026-03-31 13F MERCK COM 58933Y105 237,613 -23,268 -8.92 28,582 4.09 1.5129
2026-02-02 2025-12-31 13F MERCK COM 58933Y105 260,881 -1,927 -0.73 27,460 24.50 1.3671
2025-10-16 2025-09-30 13F MERCK COM 58933Y105 262,808 -34,848 -11.71 22,057 -6.39 1.0987
2025-07-22 2025-06-30 13F MERCK COM 58933Y105 297,656 10,000 3.48 23,562 -8.75 1.2745
2025-04-24 2025-03-31 13F MERCK COM 58933Y105 287,656 -16,560 -5.44 25,820 -14.68 1.5432
2025-01-23 2024-12-31 13F MERCK COM 58933Y105 304,216 21,166 7.48 30,263 -5.85 1.7288
2024-10-23 2024-09-30 13F MERCK COM 58933Y105 283,050 -1,831 -0.64 32,143 -8.86 1.8327
2024-07-25 2024-06-30 13F MERCK COM 58933Y105 284,881 -3,069 -1.07 35,268 -7.18 2.0840
2024-05-07 2024-03-31 13F MERCK COM 58933Y105 287,950 -2,086 -0.72 37,995 20.17 2.1852
2024-01-17 2023-12-31 13F MERCK COM 58933Y105 290,036 -2,241 -0.77 31,620 5.08 1.9637
2023-11-14 2023-09-30 13F MERCK COM 58933Y105 292,277 14,041 5.05 30,090 -6.28 2.0681
2023-08-09 2023-06-30 13F MERCK COM 58933Y105 278,236 -2,853 -1.01 32,106 7.36 2.0873
2023-05-11 2023-03-31 13F MERCK COM 58933Y105 281,089 -67,555 -19.38 29,905 78,597.37 2.2146
2023-02-07 2022-12-31 13F MERCK COM 58933Y105 348,644 -26,867 -7.15 39 -99.88 2.7316
2022-11-10 2022-09-30 13F MERCK COM 58933Y105 375,511 17,487 4.88 32,339 -0.93 2.4976
2022-07-14 2022-06-30 13F MERCK COM 58933Y105 358,024 -15,071 -4.04 32,641 6.63 2.3415
2022-04-19 2022-03-31 13F MERCK COM 58933Y105 373,095 -2,400 -0.64 30,612 6.37 1.8335
2022-01-28 2021-12-31 13F MERCK COM 58933Y105 375,495 -3,859 -1.02 28,778 1.00 1.6296
2021-10-25 2021-09-30 13F MERCK COM 58933Y105 379,354 -457 -0.12 28,493 -3.54 1.7281
2021-07-30 2021-06-30 13F MERCK COM 58933Y105 379,811 -34,416 -8.31 29,538 -7.50 1.7651
2021-04-27 2021-03-31 13F MERCK COM 58933Y105 414,227 -4,635 -1.11 31,933 -6.80 1.9715
2021-01-21 2020-12-31 13F MERCK COM 58933Y105 418,862 -7,498 -1.76 34,263 -3.12 2.1980
2020-10-16 2020-09-30 13F MERCK COM 58933Y105 426,360 -1,201 -0.28 35,367 6.97 2.5279
2020-07-22 2020-06-30 13F MERCK COM 58933Y105 427,561 -58,474 -12.03 33,063 -11.59 2.5869
2020-05-05 2020-03-31 13F MERCK COM 58933Y105 486,035 -3,831 -0.78 37,396 -16.06 3.5233
2020-02-05 2019-12-31 13F MERCK COM 58933Y105 489,866 -18,172 -3.58 44,553 4.18 3.0909
2019-11-20 2019-09-30 13F MERCK AND COM 58933Y105 508,038 41,126 8.81 42,767 9.24 3.1755
2019-07-29 2019-06-30 13F MERCK AND COM 58933Y105 466,912 -2,351 -0.50 39,151 0.31 2.9156
2019-04-18 2019-03-31 13F MERCK COM 58933Y105 469,263 -3,571 -0.76 39,029 8.03 2.9626
2019-01-16 2018-12-31 13F MERCK COM 58933Y105 472,834 -84,876 -15.22 36,129 -8.68 3.0658
2018-10-17 2018-09-30 13F MERCK COM 58933Y105 557,710 -1,646 -0.29 39,564 16.53 2.8495
2018-07-18 2018-06-30 13F MERCK COM 58933Y105 559,356 -32,223 -5.45 33,953 5.37 2.5867
2018-04-16 2018-03-31 13F MERCK COM 58933Y105 591,579 -8,663 -1.44 32,223 -4.60 2.5166
2018-01-26 2017-12-31 13F MERCK COM 58933Y105 600,242 -2,783 -0.46 33,776 -12.52 2.5746
2017-10-10 2017-09-30 13F MERCK COM 58933Y105 603,025 -1,745 -0.29 38,612 -0.38 3.0681
2017-07-19 2017-06-30 13F MERCK COM 58933Y105 604,770 -391 -0.06 38,760 0.80 3.1165
2017-04-11 2017-03-31 13F MERCK COM 58933Y105 605,161 19,967 3.41 38,452 11.62 3.1684
2017-01-31 2016-12-31 13F/A-1 MERCK COM 58933Y105 585,194 -8,194 -1.38 34,450 -6.97 2.9038
2017-01-19 2016-12-31 13F MERCK COM 58933Y105 585,194 34,450
2016-10-13 2016-09-30 13F MERCK COM 58933Y105 593,388 -1,550 -0.26 37,033 8.05 3.1247
2016-07-18 2016-06-30 13F MERCK COM 58933Y105 594,938 -3,289 -0.55 34,274 8.28 2.9595
2016-04-15 2016-03-31 13F MERCK COM 58933Y105 598,227 -51,309 -7.90 31,652 -7.74 2.7094
2016-01-27 2015-12-31 13F MERCK COM 58933Y105 649,536 -19,537 -2.92 34,308 3.82 2.7668
2015-11-12 2015-09-30 13F MERCK COM 58933Y105 669,073 -34,067 -4.84 33,046 -17.45 2.7762
2015-08-10 2015-06-30 13F MERCK COM 58933Y105 703,140 174,379 32.98 40,030 31.71 3.0748
2015-05-11 2015-03-31 13F MERCK COM 58933Y105 528,761 -841 -0.16 30,393 1.05 5.9401
2015-01-16 2014-12-31 13F MERCK COM 58933Y105 529,602 270 0.05 30,076 -4.15 5.6252
2014-10-14 2014-09-30 13F MERCK COM 58933Y105 529,332 -15,402 -2.83 31,379 -0.43 6.1447
2014-07-22 2014-06-30 13F MERCK COM 58933Y105 544,734 3,780 0.70 31,513 2.61 5.8765
2014-04-16 2014-03-31 13F MERCK COM 58933Y105 540,954 -2,545 -0.47 30,710 12.90 5.9745
2014-01-28 2013-12-31 13F MERCK COM 58933Y105 543,499 -3,459 -0.63 27,202 4.46 5.4135
2013-10-17 2013-09-30 13F MERCK COM 58933Y105 546,958 -16,392 -2.91 26,041 -0.49 5.7533
2013-07-16 2013-06-30 13F MERCK COM 58933Y105 563,350 563,350 26,168 5.9604
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.