Merck & Co., Inc.
US ˙ NYSE ˙ US58933Y1055

SecurityMRK / Merck & Co., Inc.
InstitutionLinscomb & Williams, Inc.
Latest Disclosed Ownership93,611 shares
Latest Disclosed Value $ 11,260,462
Linscomb & Williams, Inc. reports 13.99% decrease in ownership of MRK / Merck & Co., Inc.

On May 11, 2026 - Linscomb & Williams, Inc. filed a 13F-HR form disclosing ownership of 93,611 shares of Merck & Co., Inc. (US:MRK) valued at $11,260,467 USD as of March 31, 2026. The entity filed a previous 13F-HR on February 10, 2026 disclosing 108,843 shares of Merck & Co., Inc.. This represents a change in shares of -13.99% during the quarter. The current value of the position is $10,737,182 USD.

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)
2026-05-11 2026-03-31 13F MERCK COM 58933Y105 93,611 -15,232 -13.99 11,260 -1.71 0.5011
2026-02-10 2025-12-31 13F MERCK COM 58933Y105 108,843 2,152 2.02 11,457 27.94 0.4809
2025-11-05 2025-09-30 13F MERCK COM 58933Y105 106,691 4,277 4.18 8,955 10.45 0.3858
2025-08-04 2025-06-30 13F MERCK COM 58933Y105 102,414 671 0.66 8,107 -11.22 0.3726
2025-05-12 2025-03-31 13F MERCK COM 58933Y105 101,743 24,218 31.24 9,132 18.41 0.4548
2025-02-05 2024-12-31 13F MERCK COM 58933Y105 77,525 6,120 8.57 7,712 -4.88 0.3840
2024-11-06 2024-09-30 13F MERCK COM 58933Y105 71,405 -135 -0.19 8,109 -8.45 0.4020
2024-08-07 2024-06-30 13F MERCK COM 58933Y105 71,540 307 0.43 8,857 -5.78 0.4583
2024-05-14 2024-03-31 13F MERCK COM 58933Y105 71,233 375 0.53 9,399 21.69 0.4835
2024-02-06 2023-12-31 13F MERCK COM 58933Y105 70,858 -1,101 -1.53 7,725 4.27 0.4252
2023-10-10 2023-09-30 13F MERCK COM 58933Y105 71,959 -4,516 -5.91 7,408 -16.05 0.4333
2023-08-09 2023-06-30 13F MERCK COM 58933Y105 76,475 -1,425 -1.83 8,824 6.48 0.4762
2023-05-11 2023-03-31 13F MERCK COM 58933Y105 77,900 1,783 2.34 8,288 -1.87 0.4347
2023-02-14 2022-12-31 13F MERCK COM 58933Y105 76,117 6,491 9.32 8,445 40.84 0.4287
2022-11-09 2022-09-30 13F MERCK COM 58933Y105 69,626 3,541 5.36 5,996 -0.48 0.3640
2022-08-15 2022-06-30 13F MERCK COM 58933Y105 66,085 9,209 16.19 6,025 29.10 0.3454
2022-05-17 2022-03-31 13F MERCK COM 58933Y105 56,876 18,589 48.55 4,667 59.07 0.2229
2022-02-10 2021-12-31 13F MERCK COM 58933Y105 38,287 942 2.52 2,934 4.60 0.1401
2021-11-03 2021-09-30 13F MERCK COM 58933Y105 37,345 -553 -1.46 2,805 -4.82 0.1446
2021-08-10 2021-06-30 13F MERCK COM 58933Y105 37,898 -2,046 -5.12 2,947 -4.29 0.1509
2021-05-12 2021-03-31 13F MERCK & CO. COM 58933Y105 39,944 497 1.26 3,079 -4.59 0.1674
2021-02-11 2020-12-31 13F MERCK & CO. COM 58933Y105 39,447 -531 -1.33 3,227 -2.68 0.1928
2020-11-13 2020-09-30 13F MERCK & CO. COM 58933Y105 39,978 -1,154 -2.81 3,316 4.24 0.2284
2020-08-11 2020-06-30 13F MERCK & CO. COM 58933Y105 41,132 296 0.72 3,181 1.24 0.2327
2020-05-11 2020-03-31 13F MERCK & CO. COM 58933Y105 40,836 1,100 2.77 3,142 -13.06 0.2777
2020-02-13 2019-12-31 13F MERCK COM 58933Y105 39,736 2,347 6.28 3,614 14.84 0.2358
2019-11-08 2019-09-30 13F MERCK COM 58933Y105 37,389 -873 -2.28 3,147 -1.90 0.2530
2019-08-06 2019-06-30 13F MERCK COM 58933Y105 38,262 -949 -2.42 3,208 -1.63 0.2632
2019-05-09 2019-03-31 13F MERCK COM 58933Y105 39,211 -45,783 -53.87 3,261 -49.78 0.2745
2019-02-08 2018-12-31 13F MERCK COM 58933Y105 84,994 134 0.16 6,494 7.87 0.6140
2018-11-08 2018-09-30 13F MERCK COM 58933Y105 84,860 -50 -0.06 6,020 16.80 0.4943
2018-08-07 2018-06-30 13F MERCK COM 58933Y105 84,910 2,086 2.52 5,154 14.25 0.4382
2018-05-04 2018-03-31 13F MERCK COM 58933Y105 82,824 1,742 2.15 4,511 -1.14 0.3837
2018-02-02 2017-12-31 13F MERCK COM 58933Y105 81,082 6,684 8.98 4,563 -4.22 0.3749
2017-10-27 2017-09-30 13F MERCK COM 58933Y105 74,398 869 1.18 4,764 1.10 0.4090
2017-08-15 2017-06-30 13F MERCK COM 58933Y105 73,529 2,011 2.81 4,712 3.70 0.4215
2017-04-28 2017-03-31 13F MERCK COM 58933Y105 71,518 5,580 8.46 4,544 17.05 0.4114
2017-02-07 2016-12-31 13F MERCK COM 58933Y105 65,938 2,138 3.35 3,882 -2.51 0.3611
2016-11-10 2016-09-30 13F MERCK COM 58933Y105 63,800 5,609 9.64 3,982 18.79 0.3871
2016-08-05 2016-06-30 13F MERCK COM 58933Y105 58,191 2,511 4.51 3,352 13.78 0.3378
2016-05-04 2016-03-31 13F MERCK & CO INC COM 58933Y105 55,680 1,243 2.28 2,946 2.47 0.3190
2016-01-29 2015-12-31 13F MERCK & CO INC COM 58933Y105 54,437 3,031 5.90 2,875 13.23 0.3255
2015-11-09 2015-09-30 13F MERCK & CO INC COM 58933Y105 51,406 -9,215 -15.20 2,539 -26.43 0.2985
2015-08-05 2015-06-30 13F MERCK & CO INC COM 58933Y105 60,621 32,656 116.77 3,451 114.75 0.3767
2015-05-06 2015-03-31 13F MERCK & CO INC COM 58933Y105 27,965 27,965 0.00 1,607 0.1724
2015-02-04 2014-12-31 13F MERCK & CO INC COM 58933Y105 0 -28,680 -100.00 0 -100.00
2014-11-05 2014-09-30 13F MERCK & CO INC COM 58933Y105 28,680 -2,838 -9.00 1,700 -6.75 0.1876
2014-08-05 2014-06-30 13F MERCK & CO INC COM 58933Y105 31,518 1,257 4.15 1,823 6.11 0.1924
2014-05-09 2014-03-31 13F MERCK & CO INC COM 58933Y105 30,261 4,766 18.69 1,718 34.64 0.1895
2014-02-05 2013-12-31 13F Merck COM 58933Y105 25,495 -5,586 -17.97 1,276 -13.78 0.1565
2013-11-01 2013-09-30 13F Merck COM 58933Y105 31,081 3,402 12.29 1,480 15.09 0.1941
2013-08-01 2013-06-30 13F Merck COM 58933Y105 27,679 27,679 1,286 0.1759
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.