默克公司
MX ˙ BMV ˙ US58933Y1055
SecurityMX:MRK / Merck & Co., Inc.
InstitutionEnterprise Financial Services Corp
Latest Disclosed Ownership18,627 shares
Latest Disclosed Value $ 2,240,641
Enterprise Financial Services Corp reports 0.59% increase in ownership of MRK / Merck & Co., Inc.

On May 5, 2026 - Enterprise Financial Services Corp filed a 13F-HR form disclosing ownership of 18,627 shares of Merck & Co., Inc. (MX:MRK) valued at $2,240,641 USD as of March 31, 2026. The entity filed a previous 13F-HR on January 14, 2026 disclosing 18,518 shares of Merck & Co., Inc.. This represents a change in shares of 0.59% 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)
2026-05-05 2026-03-31 13F MERCK COM 58933Y105 18,627 109 0.59 2,241 14.93 0.6301
2026-01-14 2025-12-31 13F MERCK COM 58933Y105 18,518 -79 -0.42 1,949 24.94 0.9896
2025-10-15 2025-09-30 13F MERCK COM 58933Y105 18,597 -128 -0.68 1,561 5.26 0.8046
2025-08-12 2025-06-30 13F MERCK COM 58933Y105 18,725 447 2.45 1,482 -9.63 0.7911
2025-05-14 2025-03-31 13F MERCK COM 58933Y105 18,278 -2,466 -11.89 1,641 -20.50 0.9701
2025-02-07 2024-12-31 13F MERCK COM 58933Y105 20,744 2,352 12.79 2,064 -1.20 1.1481
2024-11-12 2024-09-30 13F MERCK COM 58933Y105 18,392 -887 -4.60 2,089 -12.49 1.2172
2024-08-13 2024-06-30 13F MERCK COM 58933Y105 19,279 196 1.03 2,387 -5.24 1.4694
2024-05-14 2024-03-31 13F MERCK COM 58933Y105 19,083 210 1.11 2,518 22.41 1.5157
2024-02-09 2023-12-31 13F MERCK COM 58933Y105 18,873 -141 -0.74 2,058 5.11 1.2537
2023-10-31 2023-09-30 13F MERCK COM 58933Y105 19,014 32 0.17 1,957 -10.64 1.3526
2023-08-14 2023-06-30 13F MERCK COM 58933Y105 18,982 -220 -1.15 2,190 7.25 1.3931
2023-05-15 2023-03-31 13F MERCK COM 58933Y105 19,202 0 0.00 2,043 -4.13 1.3345
2023-02-14 2022-12-31 13F MERCK COM 58933Y105 19,202 -169 -0.87 2,130 27.70 1.4711
2022-11-14 2022-09-30 13F MERCK COM 58933Y105 19,371 116 0.60 1,668 -4.96 1.2433
2022-08-09 2022-06-30 13F MERCK COM 58933Y105 19,255 331 1.75 1,755 13.01 0.3419
2022-05-16 2022-03-31 13F MERCK COM 58933Y105 18,924 -350 -1.82 1,553 5.15 0.2549
2022-02-14 2021-12-31 13F Merck Common Stock 58933Y105 19,274 -1,865 -8.82 1,477 -6.99 0.2266
2021-11-15 2021-09-30 13F Merck Common Stock 58933Y105 21,139 1,791 9.26 1,588 5.59 0.2055
2021-08-16 2021-06-30 13F Merck Common Stock 58933Y105 19,348 -814 -4.04 1,504 -3.22 0.2405
2021-05-13 2021-03-31 13F Merck Common Stock 58933Y105 20,162 -135 -0.67 1,554 -6.39 0.2772
2021-02-12 2020-12-31 13F Merck Common Stock 58933Y105 20,297 20 0.10 1,660 -1.31 0.3153
2020-11-13 2020-09-30 13F Merck Common Stock 58933Y105 20,277 -1,366 -6.31 1,682 0.54 0.3478
2020-08-04 2020-06-30 13F Merck Common Stock 58933Y105 21,643 748 3.58 1,673 4.04 0.3609
2020-05-15 2020-03-31 13F Merck Common Stock 58933Y105 20,895 230 1.11 1,608 -14.42 0.4057
2020-01-28 2019-12-31 13F Merck Common Stock 58933Y105 20,665 -14 -0.07 1,879 7.93 0.4094
2019-10-31 2019-09-30 13F Merck Common Stock 58933Y105 20,679 -309 -1.47 1,741 -1.02 0.3964
2019-07-30 2019-06-30 13F Merck Common Stock 58933Y105 20,988 410 1.99 1,759 2.81 0.3821
2019-04-26 2019-03-31 13F MERCK COMMON STOCK 58933Y105 20,578 6,937 50.85 1,711 64.20 0.3734
2019-01-25 2018-12-31 13F MERCK COMMON STOCK 58933Y105 13,641 -394 -2.81 1,042 4.62 0.6573
2018-10-26 2018-09-30 13F MERCK COMMON STOCK 58933Y105 14,035 -3,798 -21.30 996 -7.95 0.5221
2018-07-27 2018-06-30 13F MERCK COMMON STOCK 58933Y105 17,833 240 1.36 1,082 12.94 0.5487
2018-04-27 2018-03-31 13F MERCK COMMON STOCK 58933Y105 17,593 -1,219 -6.48 958 -9.54 0.4933
2018-01-26 2017-12-31 13F MERCK COMMON STOCK 58933Y105 18,812 -1,197 -5.98 1,059 -17.33 0.5148
2017-10-27 2017-09-30 13F MERCK COMMON STOCK 58933Y105 20,009 -598 -2.90 1,281 -3.03 0.6338
2017-07-28 2017-06-30 13F MERCK COMMON STOCK 58933Y105 20,607 -1 -0.00 1,321 0.84 0.6592
2017-04-27 2017-03-31 13F MERCK COMMON STOCK 58933Y105 20,608 0 0.00 1,310 7.91 0.6457
2017-01-26 2016-12-31 13F MERCK COMMON STOCK 58933Y105 20,608 374 1.85 1,214 -3.88 0.6106
2016-10-28 2016-09-30 13F MERCK COMMON STOCK 58933Y105 20,234 127 0.63 1,263 9.07 0.7152
2016-07-29 2016-06-30 13F MERCK COMMON STOCK 58933Y105 20,107 4,517 28.97 1,158 40.36 0.6821
2016-04-29 2016-03-31 13F MERCK COMMON STOCK 58933Y105 15,590 355 2.33 825 2.61 0.4976
2016-01-29 2015-12-31 13F MERCK COMMON STOCK 58933Y105 15,235 -1,617 -9.60 804 -3.37 0.4768
2015-10-29 2015-09-30 13F MERCK COMMON STOCK 58933Y105 16,852 388 2.36 832 -11.21 0.5321
2015-07-27 2015-06-30 13F MERCK COMMON STOCK 58933Y105 16,464 -342 -2.03 937 -3.10 0.5538
2015-04-29 2015-03-31 13F MERCK COMMON STOCK 58933Y105 16,806 0 0.00 967 1.36 0.5680
2015-01-23 2014-12-31 13F MERCK COMMON STOCK 58933Y105 16,806 -300 -1.75 954 -5.92 0.5775
2014-10-24 2014-09-30 13F MERCK COMMON STOCK 58933Y105 17,106 -102 -0.59 1,014 1.81 0.6423
2014-07-24 2014-06-30 13F MERCK COMMON STOCK 58933Y105 17,208 -200 -1.15 996 0.81 0.5941
2014-04-24 2014-03-31 13F MERCK COMMON STOCK 58933Y105 17,408 -89 -0.51 988 12.79 0.6066
2014-01-30 2013-12-31 13F MERCK COMMON STOCK 58933Y105 17,497 -1,374 -7.28 876 -2.45 0.5079
2013-10-25 2013-09-30 13F MERCK COMMON STOCK 58933Y105 18,871 -2,386 -11.22 898 -9.11 0.5673
2013-07-25 2013-06-30 13F MERCK COMMON STOCK 58933Y105 21,257 21,257 988 0.6778
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.