Merck & Co., Inc.
MX ˙ BMV ˙ US58933Y1055
SecurityMX:MRK / Merck & Co., Inc.
InstitutionWeaver C. Barksdale & Associates, Inc.
Latest Disclosed Ownership11,007 shares
Latest Disclosed Value $ 1,322,500
Weaver C. Barksdale & Associates, Inc. reports 3.06% decrease in ownership of MRK / Merck & Co., Inc.

On May 14, 2026 - Weaver C. Barksdale & Associates, Inc. filed a 13F-HR form disclosing ownership of 11,007 shares of Merck & Co., Inc. (MX:MRK) valued at $1,322,500 USD as of March 31, 2026. The entity filed a previous 13F-HR on February 13, 2026 disclosing 11,355 shares of Merck & Co., Inc.. This represents a change in shares of -3.06% 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 11,007 -348 -3.06 1,322 10.63 1.2611
2026-02-13 2025-12-31 13F MERCK COM 58933Y105 11,355 -1,989 -14.91 1,196 6.70 1.2549
2025-11-12 2025-09-30 13F MERCK COM 58933Y105 13,344 -1,281 -8.76 1,120 -3.20 1.0781
2025-08-12 2025-06-30 13F MERCK COM 58933Y105 14,625 -136 -0.92 1,158 -12.61 1.1101
2025-05-14 2025-03-31 13F MERCK COM 58933Y105 14,761 3,723 33.73 1,324 20.58 1.2705
2025-02-12 2024-12-31 13F MERCK COM 58933Y105 11,038 -397 -3.47 1,098 -15.41 1.0509
2024-11-13 2024-09-30 13F MERCK COM 58933Y105 11,435 -608 -5.05 1,299 -12.89 1.1704
2024-08-13 2024-06-30 13F MERCK COM 58933Y105 12,043 -283 -2.30 1,491 -8.36 1.4157
2024-05-14 2024-03-31 13F MERCK COM 58933Y105 12,326 -124 -1.00 1,626 19.82 1.4925
2024-02-13 2023-12-31 13F MERCK COM 58933Y105 12,450 -4,266 -25.52 1,357 -21.10 1.3270
2023-11-14 2023-09-30 13F MERCK COM 58933Y105 16,716 800 5.03 1,721 -6.32 1.4667
2023-08-14 2023-06-30 13F MERCK COM 58933Y105 15,916 -3,811 -19.32 1,837 -12.49 1.8156
2023-05-12 2023-03-31 13F MERCK COM 58933Y105 19,727 -1,103 -5.30 2,099 -9.22 1.9614
2023-02-14 2022-12-31 13F MERCK COM 58933Y105 20,830 620 3.07 2,311 32.82 2.0370
2022-11-14 2022-09-30 13F MERCK COM 58933Y105 20,210 -811 -3.86 1,740 -9.19 1.7452
2022-08-11 2022-06-30 13F MERCK COM 58933Y105 21,021 4,233 25.21 1,916 39.14 1.7836
2022-05-16 2022-03-31 13F MERCK COM 58933Y105 16,788 235 1.42 1,377 8.51 1.2261
2022-02-14 2021-12-31 13F MERCK COM 58933Y105 16,553 -5,719 -25.68 1,269 1.28 1.1497
2018-01-10 2017-12-31 13F MERCK & COMMON 58933Y105 22,272 0 0.00 1,253 -12.13 1.3172
2017-10-12 2017-09-30 13F MERCK & COMMON 58933Y105 22,272 0 0.00 1,426 -0.07 1.5912
2017-07-13 2017-06-30 13F MERCK & COMMON 58933Y105 22,272 0 0.00 1,427 0.85 1.6647
2017-04-07 2017-03-31 13F MERCK & COMMON 58933Y105 22,272 6,302 39.46 1,415 50.53 1.6666
2017-01-26 2016-12-31 13F MERCK & COMMON 58933Y105 15,970 -80 -0.50 940 -6.19 1.5150
2016-10-12 2016-09-30 13F MERCK & COMMON 58933Y105 16,050 1,235 8.34 1,002 17.47 1.6835
2016-07-11 2016-06-30 13F MERCK & COMMON 58933Y105 14,815 0 0.00 853 8.80 1.4819
2016-04-05 2016-03-31 13F MERCK & COMMON 58933Y105 14,815 -106 -0.71 784 -0.51 0.5893
2016-01-25 2015-12-31 13F MERCK & COMMON 58933Y105 14,921 0 0.00 788 6.92 0.6146
2015-10-07 2015-09-30 13F MERCK & COMMON 58933Y105 14,921 0 0.00 737 -13.19 0.5936
2015-07-17 2015-06-30 13F MERCK & COMMON 58933Y105 14,921 945 6.76 849 5.73 0.6234
2015-04-09 2015-03-31 13F MERCK & COMMON 58933Y105 13,976 0 0.00 803 1.13 0.6038
2015-01-12 2014-12-31 13F MERCK & COM 58933Y105 13,976 -544 -3.75 794 -7.78 0.6390
2014-10-27 2014-09-30 13F MERCK & COMMON 58933Y105 14,520 0 0.00 861 2.50 0.7094
2014-07-11 2014-06-30 13F MERCK & COM 58933Y105 14,520 0 0.00 840 1.94 0.6753
2014-04-14 2014-03-31 13F MERCK & com 58933Y105 14,520 14,520 824 0.6891
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.