Merck & Co., Inc.
MX ˙ BMV ˙ US58933Y1055
SecurityMX:MRK / Merck & Co., Inc.
InstitutionSegall Bryant & Hamill, Llc
Latest Disclosed Ownership117,854 shares
Latest Disclosed Value $ 13,695,824
Segall Bryant & Hamill, Llc reports 608.68% increase in ownership of MRK / Merck & Co., Inc.

On May 15, 2026 - Segall Bryant & Hamill, Llc filed a 13F-HR form disclosing ownership of 117,854 shares of Merck & Co., Inc. (MX:MRK) valued at $13,695,824 USD as of March 31, 2026. The entity filed a previous 13F-HR on February 13, 2026 disclosing 16,630 shares of Merck & Co., Inc.. This represents a change in shares of 608.68% 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)
2026-05-15 2026-03-31 13F MERCK COM 58933Y105 117,854 101,224 608.68 13,696 682.57 0.2219
2026-02-13 2025-12-31 13F MERCK COM 58933Y105 16,630 -79 -0.47 1,750 24.82 0.0237
2025-11-12 2025-09-30 13F MERCK COM 58933Y105 16,709 -2,530 -13.15 1,402 -7.88 0.0187
2025-08-12 2025-06-30 13F MERCK COM 58933Y105 19,239 0 0.00 1,523 -11.82 0.0214
2025-05-02 2025-03-31 13F MERCK COM 58933Y105 19,239 -176 -0.91 1,727 -10.62 0.0265
2025-02-11 2024-12-31 13F MERCK COM 58933Y105 19,415 -1,507 -7.20 1,931 -18.69 0.0266
2024-11-08 2024-09-30 13F MERCK COM 58933Y105 20,922 20,922 2,376 0.0324
2024-02-14 2023-12-31 13F MERCK COM 58933Y105 0 -131,859 -100.00 0 -100.00
2023-11-09 2023-09-30 13F MERCK COM 58933Y105 131,859 -165 -0.12 13,575 -10.90 0.1571
2023-08-14 2023-06-30 13F MERCK COM 58933Y105 132,024 -3,493 -2.58 15,234 108,714.29 0.1594
2023-05-15 2023-03-31 13F MERCK COM 58933Y105 135,517 -919 -0.67 14 -99.91 0.1555
2023-02-14 2022-12-31 13F MERCK COM 58933Y105 136,436 -470 -0.34 15,137 28.29 0.1689
2022-11-14 2022-09-30 13F MERCK COM 58933Y105 136,906 -1,265 -0.92 11,799 -6.27 0.1405
2022-08-15 2022-06-30 13F MERCK COM 58933Y105 138,171 -1,837 -1.31 12,588 9.80 0.1417
2022-05-13 2022-03-31 13F MERCK COM 58933Y105 140,008 -5,427 -3.73 11,465 2.94 0.1097
2022-02-14 2021-12-31 13F MERCK COM 58933Y105 145,435 807 0.56 11,138 2.31 0.1029
2021-12-30 2021-09-30 13F/A-1 MERCK COM 58933Y105 144,628 13,543 10.33 10,886 6.55 0.1041
2021-11-03 2021-09-30 13F MERCK COM 58933Y105 144,628 13,543 10,886 0.1053
2021-08-12 2021-06-30 13F MERCK COM 58933Y105 131,085 -4,143 -3.06 10,217 -1.98 0.0991
2021-05-13 2021-03-31 13F MERCK COM 58933Y105 135,228 -4,745 -3.39 10,423 -8.87 0.1030
2021-02-12 2020-12-31 13F MERCK COM 58933Y105 139,973 -443 -0.32 11,437 -1.80 0.1272
2020-11-13 2020-09-30 13F MERCK COM 58933Y105 140,416 -9,186 -6.14 11,647 0.69 0.1582
2020-08-14 2020-06-30 13F MERCK COM 58933Y105 149,602 7,946 5.61 11,567 6.12 0.1944
2020-05-14 2020-03-31 13F MERCK COM 58933Y105 141,656 -1,180 -0.83 10,900 -16.05 0.2214
2020-02-11 2019-12-31 13F MERCK COM 58933Y105 142,836 -4,136 -2.81 12,984 5.03 0.2014
2019-11-12 2019-09-30 13F MERCK COM 58933Y105 146,972 -345 -0.23 12,362 -0.02 0.1919
2019-08-14 2019-06-30 13F Merck COM 58933Y105 147,317 -367 -0.25 12,364 0.68 0.1868
2019-05-15 2019-03-31 13F Merck COM 58933Y105 147,684 -2,994 -1.99 12,280 6.66 0.1907
2019-02-14 2018-12-31 13F Merck COM 58933Y105 150,678 73 0.05 11,513 7.76 0.1984
2018-11-14 2018-09-30 13F Merck COM 58933Y105 150,605 -7,280 -4.61 10,684 11.48 0.1573
2018-08-08 2018-06-30 13F Merck COM 58933Y105 157,885 39,465 33.33 9,584 48.59 0.1461
2018-05-15 2018-03-31 13F Merck COM 58933Y105 118,420 1,471 1.26 6,450 -1.99 0.1494
2018-02-15 2017-12-31 13F Merck COM 58933Y105 116,949 -9,018 -7.16 6,581 -18.41 0.1449
2017-11-14 2017-09-30 13F Merck -Common Stock 58933Y105 125,967 -370 -0.29 8,066 -0.38 0.1873
2017-08-14 2017-06-30 13F Merck -Common Stock 58933Y105 126,337 1,261 1.01 8,097 1.89 0.1908
2017-05-12 2017-03-31 13F Merck -Common Stock 58933Y105 125,076 1,238 1.00 7,947 9.01 0.1921
2017-02-14 2016-12-31 13F Merck -Common Stock 58933Y105 123,838 2,317 1.91 7,290 -3.88 0.1830
2016-11-14 2016-09-30 13F Merck -Common Stock 58933Y105 121,521 -300 -0.25 7,584 8.06 0.1946
2016-08-10 2016-06-30 13F Merck -Common Stock 58933Y105 121,821 -2,840 -2.28 7,018 6.40 0.1850
2016-05-12 2016-03-31 13F Merck -Common Stock 58933Y105 124,661 2,437 1.99 6,596 2.17 0.1633
2016-02-12 2015-12-31 13F Merck -Common Stock 58933Y105 122,224 -442 -0.36 6,456 6.57 0.1552
2015-11-12 2015-09-30 13F Merck -Common Stock 58933Y105 122,666 11,723 10.57 6,058 -4.08 0.1476
2015-08-12 2015-06-30 13F Merck -Common Stock 58933Y105 110,943 -2,314 -2.04 6,316 -2.98 0.1414
2015-05-14 2015-03-31 13F Merck -Common Stock 58933Y105 113,257 2,570 2.32 6,510 3.56 0.1464
2015-02-12 2014-12-31 13F Merck -Common Stock 58933Y105 110,687 201 0.18 6,286 -4.03 0.1420
2014-11-13 2014-09-30 13F Merck -Common Stock 58933Y105 110,486 -1,333 -1.19 6,550 1.25 0.1513
2014-08-14 2014-06-30 13F Merck -Common Stock 58933Y105 111,819 -14,093 -11.19 6,469 -9.50 0.1540
2014-05-15 2014-03-31 13F/A-1 Merck -Common Stock 58933Y105 125,912 -6,420 -4.85 7,148 7.93 0.1707
2014-05-14 2014-03-31 13F Merck -Common Stock 58933Y105 125,912 7,148
2014-03-12 2013-12-31 13F/A-1 Merck -Common Stock 58933Y105 132,332 2,281 1.75 6,623 6.96 0.1541
2014-02-05 2013-12-31 13F Merck -Common Stock 58933Y105 132,332 6,623
2013-11-15 2013-09-30 13F Merck -Common Stock 58933Y105 130,051 3,793 3.00 6,192 5.58 0.1529
2013-07-24 2013-06-30 13F Merck -Common Stock 58933Y105 126,258 -2,697 -2.09 5,865 2.89 0.1548
2013-05-23 2013-03-31 13F Merck -Common Stock 58933Y105 128,955 128,955 5,700 0.1515
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.