머크 앤 컴퍼니(Merck & Co., Inc.)
MX ˙ BMV ˙ US58933Y1055
SecurityMX:MRK / Merck & Co., Inc.
InstitutionBaird Financial Group, Inc.
Latest Disclosed Ownership1,163,093 shares
Latest Disclosed Value $ 139,908,461
Baird Financial Group, Inc. reports 10.26% decrease in ownership of MRK / Merck & Co., Inc.

On May 14, 2026 - Baird Financial Group, Inc. filed a 13F-HR form disclosing ownership of 1,163,093 shares of Merck & Co., Inc. (MX:MRK) valued at $139,908,461 USD as of March 31, 2026. The entity filed a previous 13F-HR on February 13, 2026 disclosing 1,296,021 shares of Merck & Co., Inc.. This represents a change in shares of -10.26% 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 1,163,093 -132,928 -10.26 139,908 2.56 0.1176
2026-02-13 2025-12-31 13F MERCK CO INC COM COMMON 58933Y105 1,296,021 29,226 2.31 136,419 28.31 0.2126
2025-11-13 2025-09-30 13F MERCK CO INC COM COMMON 58933Y105 1,266,795 19,629 1.57 106,323 7.70 0.1710
2025-08-13 2025-06-30 13F MERCK CO INC COM COMMON 58933Y105 1,247,166 -191,756 -13.33 98,726 -23.56 0.1731
2025-05-15 2025-03-31 13F MERCK CO INC COM COMMON 58933Y105 1,438,922 -499,779 -25.78 129,158 -33.03 0.2487
2025-02-14 2024-12-31 13F MERCK COMMON 58933Y105 1,938,701 -165,748 -7.88 192,862 -19.30 0.3688
2024-11-14 2024-09-30 13F MERCK COMMON 58933Y105 2,104,449 2,883 0.14 238,981 -8.15 0.4641
2024-08-14 2024-06-30 13F MERCK COMMON 58933Y105 2,101,566 -32,012 -1.50 260,174 -7.58 0.5397
2024-05-14 2024-03-31 13F MERCK COMMON 58933Y105 2,133,578 -49,373 -2.26 281,526 18.30 0.5903
2024-02-14 2023-12-31 13F MERCK COMMON 58933Y105 2,182,951 -199,862 -8.39 237,985 -2.99 0.5424
2023-11-13 2023-09-30 13F MERCK COMMON 58933Y105 2,382,813 -24,602 -1.02 245,311 -11.69 0.6691
2023-08-11 2023-06-30 13F MERCK COMMON 58933Y105 2,407,415 -46,100 -1.88 277,792 6.42 0.7332
2023-05-15 2023-03-31 13F MERCK COMMON 58933Y105 2,453,515 -23,286 -0.94 261,030 95,166.06 0.6439
2023-02-13 2022-12-31 13F MERCK COMMON 58933Y105 2,476,801 -569,981 -18.71 275 -99.90 0.7236
2022-11-15 2022-09-30 13F MERCK COMMON 58933Y105 3,046,782 -102,251 -3.25 262,389 -8.61 0.7731
2022-08-08 2022-06-30 13F MERCK COMMON 58933Y105 3,149,033 148,257 4.94 287,098 16.61 0.7970
2022-05-13 2022-03-31 13F MERCK COMMON 58933Y105 3,000,776 71,349 2.44 246,213 9.67 0.6084
2022-02-09 2021-12-31 13F MERCK CO INC NEW COM COMMON 58933Y105 2,929,427 -115,286 -3.79 224,511 -1.83 0.5249
2021-11-12 2021-09-30 13F MERCK CO INC NEW COM COMMON 58933Y105 3,044,713 138,508 4.77 228,688 1.18 0.5849
2021-08-11 2021-06-30 13F MERCK CO INC NEW COM COMMON 58933Y105 2,906,205 286,064 10.92 226,016 11.90 0.5874
2021-05-13 2021-03-31 13F MERCK CO INC NEW COM COMMON 58933Y105 2,620,141 293,805 12.63 201,987 6.14 0.5665
2021-02-11 2020-12-31 13F MERCK CO INC NEW COM COMMON 58933Y105 2,326,336 -16,608 -0.71 190,294 -2.08 0.5689
2020-11-12 2020-09-30 13F MERCK CO INC NEW COM COMMON 58933Y105 2,342,944 284,765 13.84 194,345 22.11 0.6658
2020-10-22 2020-06-30 13F/A-1 MERCK CO INC NEW COM COMMON 58933Y105 2,058,179 115,710 5.96 159,159 6.49 0.5996
2020-08-14 2020-06-30 13F MERCK CO INC NEW COM COMMON 58933Y105 1,985,520 43,051 179,034 354,804.7120
2020-05-14 2020-03-31 13F MERCK CO INC NEW COM COMMON 58933Y105 1,942,469 -50,130 -2.52 149,453 -17.53 0.6825
2020-02-14 2019-12-31 13F MERCK & CO INC NEW COM COMMON 58933Y105 1,992,599 34,820 1.78 181,227 9.96 0.6505
2019-11-14 2019-09-30 13F MERCK CO INC Common 58933Y105 1,957,779 18,219 0.94 164,807 1.34 0.6491
2019-08-14 2019-06-30 13F MERCK & CO INC COMMON 58933Y105 1,939,560 327,466 20.31 162,631 21.30 0.6323
2019-05-14 2019-03-31 13F MERCK COMMON 58933Y105 1,612,094 -68,773 -4.09 134,078 4.39 0.7840
2019-02-14 2018-12-31 13F Merck COMMON 58933Y105 1,680,867 142,429 9.26 128,435 16.72 0.8718
2018-11-13 2018-09-30 13F Merck COMMON 58933Y105 1,538,438 -2,520 -0.16 110,040 17.64 0.6895
2018-08-13 2018-06-30 13F MERCK amp; COMPANY INC COMMON 58933Y105 1,540,958 80,806 5.53 93,536 17.61 0.6349
2018-05-14 2018-03-31 13F Merck COMMON 58933Y105 1,460,152 59,731 4.27 79,534 0.93 0.5600
2018-02-09 2017-12-31 13F MERCK COMMON 58933Y105 1,400,421 246,408 21.35 78,802 6.65 0.5582
2017-11-14 2017-09-30 13F MERCK COMMON 58933Y105 1,154,013 -16,409 -1.40 73,891 -1.49 0.5573
2017-08-14 2017-06-30 13F MERCK COMMON 58933Y105 1,170,422 28,414 2.49 75,012 3.37 0.5877
2017-06-19 2017-03-31 13F/A-1 MERCK COMMON 58933Y105 1,142,008 -280 -0.02 72,563 7.91 0.5868
2017-05-09 2017-03-31 13F MERCK COMMON 58933Y105 1,142,008 72,563
2017-02-10 2016-12-31 13F MERCK COMMON 58933Y105 1,142,288 49,910 4.57 67,247 -1.36 0.5839
2016-11-10 2016-09-30 13F MERCK COMMON 58933Y105 1,092,378 1,530 0.14 68,175 7.94 0.6107
2016-08-11 2016-06-30 13F MERCK COMMON 58933Y105 1,090,848 1,814 0.17 63,158 9.61 0.5792
2016-05-12 2016-03-31 13F MERCK COMMON 58933Y105 1,089,034 577,935 113.08 57,620 113.44 0.5513
2016-02-11 2015-12-31 13F MERCK COMMON 58933Y105 511,099 25,704 5.30 26,996 12.61 0.2700
2015-11-12 2015-09-30 13F MERCK COMMON 58933Y105 485,395 -4,511 -0.92 23,974 -14.04 0.2549
2015-08-14 2015-06-30 13F MERCK COMMON 58933Y105 489,906 489,906 27,890 0.2744
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.