Merck & Co., Inc.
MX ˙ BMV ˙ US58933Y1055
SecurityMX:MRK / Merck & Co., Inc.
InstitutionDonaldson Capital Management, Llc
Latest Disclosed Ownership785,160 shares
Latest Disclosed Value $ 94,446,866
Donaldson Capital Management, Llc reports 0.93% increase in ownership of MRK / Merck & Co., Inc.

On April 30, 2026 - Donaldson Capital Management, Llc filed a 13F-HR form disclosing ownership of 785,160 shares of Merck & Co., Inc. (MX:MRK) valued at $94,446,866 USD as of March 31, 2026. The entity filed a previous 13F-HR on January 14, 2026 disclosing 777,961 shares of Merck & Co., Inc.. This represents a change in shares of 0.93% 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)
2026-04-30 2026-03-31 13F MERCK COM 58933Y105 785,160 7,199 0.93 94,447 15.34 3.0568
2026-01-14 2025-12-31 13F MERCK COM 58933Y105 777,961 -8,922 -1.13 81,888 23.99 2.6041
2025-11-04 2025-09-30 13F MERCK COM 58933Y105 786,883 313,652 66.28 66,043 76.30 2.0909
2025-08-07 2025-06-30 13F MERCK COM 58933Y105 473,231 -2,547 -0.54 37,461 -12.28 1.3753
2025-04-15 2025-03-31 13F MERCK COM 58933Y105 475,778 6,027 1.28 42,706 -8.61 1.6135
2025-02-07 2024-12-31 13F MERCK COM 58933Y105 469,751 -5,182 -1.09 46,731 -13.36 1.7835
2024-10-29 2024-09-30 13F MERCK COM 58933Y105 474,933 -12,457 -2.56 53,933 -10.62 2.0723
2024-07-31 2024-06-30 13F MERCK COM 58933Y105 487,390 10,017 2.10 60,339 -4.21 2.5314
2024-04-22 2024-03-31 13F MERCK COM 58933Y105 477,373 6,292 1.34 62,989 22.65 2.6212
2024-01-30 2023-12-31 13F MERCK COM 58933Y105 471,081 -8,773 -1.83 51,357 3.96 2.3017
2023-10-11 2023-09-30 13F MERCK COM 58933Y105 479,854 6,710 1.42 49,401 -9.52 2.3272
2023-07-17 2023-06-30 13F MERCK COM 58933Y105 473,144 -87 -0.02 54,596 8.44 2.4888
2023-04-13 2023-03-31 13F MERCK COM 58933Y105 473,231 -170,069 -26.44 50,347 -29.46 2.3783
2023-02-08 2022-12-31 13F MERCK COM 58933Y105 643,300 18,512 2.96 71,374 32.65 3.4811
2022-10-13 2022-09-30 13F MERCK COM 58933Y105 624,788 16,175 2.66 53,807 -3.03 2.9531
2022-08-11 2022-06-30 13F MERCK COM 58933Y105 608,613 -46,521 -7.10 55,487 3.22 2.8558
2022-05-13 2022-03-31 13F MERCK COM 58933Y105 655,134 18,935 2.98 53,754 10.25 2.4483
2022-01-21 2021-12-31 13F MERCK COM 58933Y105 636,199 30,526 5.04 48,758 7.18 2.1436
2021-11-04 2021-09-30 13F MERCK COM 58933Y105 605,673 222,078 57.89 45,492 52.49 2.2945
2021-07-28 2021-06-30 13F MERCK COM 58933Y105 383,595 40,071 11.66 29,832 12.65 1.5265
2021-05-05 2021-03-31 13F MERCK & CO. COM 58933Y105 343,524 42,902 14.27 26,482 7.69 1.4554
2021-01-11 2020-12-31 13F MERCK & CO. COM 58933Y105 300,622 294,517 4,824.19 24,591 4,759.88 1.4551
2020-11-05 2020-09-30 13F/A-1 MERCK & CO. COM 58933Y105 6,105 -706 -10.37 506 -3.98 0.0342
2020-11-02 2020-09-30 13F MERCK & CO. COM 58933Y105 6,105 -706 506 34,212.9996
2020-07-27 2020-06-30 13F MERCK & CO. COM 58933Y105 6,811 74 1.10 527 1.74 0.0383
2020-04-16 2020-03-31 13F MERCK & CO. COM 58933Y105 6,737 -26,059 -79.46 518 -82.63 0.0452
2020-01-14 2019-12-31 13F MERCK COM 58933Y105 32,796 430 1.33 2,983 9.47 0.2016
2019-11-04 2019-09-30 13F MERCK COM 58933Y105 32,366 328 1.02 2,725 1.45 0.2020
2019-08-12 2019-06-30 13F MERCK COM 58933Y105 32,038 -1,308 -3.92 2,686 -3.14 0.2227
2019-04-01 2019-03-31 13F MERCK COM 58933Y105 33,346 1,310 4.09 2,773 13.28 0.2468
2019-02-08 2018-12-31 13F MERCK COM 58933Y105 32,036 769 2.46 2,448 10.37 0.2495
2018-11-06 2018-09-30 13F MERCK COM 58933Y105 31,267 737 2.41 2,218 19.70 0.1935
2018-08-07 2018-06-30 13F MERCK COM 58933Y105 30,530 -807 -2.58 1,853 8.55 0.1806
2018-04-30 2018-03-31 13F MERCK COM 58933Y105 31,337 -289 -0.91 1,707 -4.10 0.1679
2018-01-30 2017-12-31 13F/A-1 MERCK COM 58933Y105 31,626 -587 -1.82 1,780 -13.72 0.1735
2017-11-08 2017-09-30 13F MERCK COM 58933Y105 32,213 25,922 412.05 2,063 411.91 0.2165
2017-08-03 2017-06-30 13F MERCK COM 58933Y105 6,291 -639 -9.22 403 -8.41 0.0457
2017-05-10 2017-03-31 13F MERCK COM 58933Y105 6,930 1,467 26.85 440 36.65 0.0511
2017-02-13 2016-12-31 13F MERCK COM 58933Y105 5,463 -9 -0.16 322 -5.57 0.0396
2016-11-14 2016-09-30 13F MERCK COM 58933Y105 5,472 518 10.46 341 19.65 0.0451
2016-08-15 2016-06-30 13F MERCK COM 58933Y105 4,954 366 7.98 285 17.28 0.0395
2016-05-12 2016-03-31 13F MERCK COM 58933Y105 4,588 -3,009 -39.61 243 -39.40 0.0350
2016-02-11 2015-12-31 13F MERCK COM 58933Y105 7,597 1,604 26.76 401 35.47 0.0586
2015-11-13 2015-09-30 13F MERCK COM 58933Y105 5,993 225 3.90 296 -9.76 0.0442
2015-08-14 2015-06-30 13F MERCK COM 58933Y105 5,768 -1,150 -16.62 328 -17.59 0.0467
2015-05-15 2015-03-31 13F MERCK COM 58933Y105 6,918 1,241 21.86 398 23.60 0.0560
2015-02-13 2014-12-31 13F MERCK COM 58933Y105 5,677 619 12.24 322 7.33 0.0481
2014-11-14 2014-09-30 13F MERCK COM 58933Y105 5,058 -284 -5.32 300 -2.91 0.0475
2014-08-13 2014-06-30 13F MERCK COM 58933Y105 5,342 -274 -4.88 309 -3.13 0.0496
2014-05-14 2014-03-31 13F MERCK COM 58933Y105 5,616 150 2.74 319 16.42 0.0577
2014-02-21 2013-12-31 13F MERCK COM 58933Y105 5,466 1,109 25.45 274 32.37 0.0530
2013-11-13 2013-09-30 13F MERCK COM 58933Y105 4,357 -50 -1.13 207 0.98 0.0438
2013-08-13 2013-06-30 13F MERCK COM 58933Y105 4,407 4,407 -20.91 205 -10.09 0.0463
2013-06-18 2013-03-31 13F MERCK COM 58933Y105 0 -5,572 -100.00 0 -100.00
2013-06-21 2012-12-31 13F MERCK COM 58933Y105 5,572 891 19.03 228 8.06 0.0645
2013-06-21 2012-09-30 13F MERCK COM 58933Y105 4,681 4,681 211 0.0621
2013-06-26 2011-09-30 13F MERCK COM 58933Y105 0 -7,596 -100.00 0 -100.00
2013-06-27 2011-06-30 13F MERCK COM 58933Y105 7,596 -346 -4.36 268 2.29 0.0935
2013-06-27 2011-03-31 13F MERCK COM 58933Y105 7,942 0 0.00 262 -8.39 0.0934
2013-06-27 2010-12-31 13F MERCK COM 58933Y105 7,942 -163 -2.01 286 -4.03 0.1111
2013-06-27 2010-09-30 13F MERCK COM 58933Y105 8,105 0 0.00 298 5.30 0.1254
2013-06-27 2010-06-30 13F MERCK COM 58933Y105 8,105 0 0.00 283 -6.60 0.1406
2013-06-27 2010-03-31 13F MERCK COM 58933Y105 8,105 8,105 303 0.1343
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.