Merck & Co., Inc.
MX ˙ BMV ˙ US58933Y1055
SecurityMX:MRK / Merck & Co., Inc.
InstitutionNorthRock Partners, LLC
Latest Disclosed Ownership34,262 shares
Latest Disclosed Value $ 4,121,397
NorthRock Partners, LLC reports 77.74% increase in ownership of MRK / Merck & Co., Inc.

On May 15, 2026 - NorthRock Partners, LLC filed a 13F-HR form disclosing ownership of 34,262 shares of Merck & Co., Inc. (MX:MRK) valued at $4,121,397 USD as of March 31, 2026. The entity filed a previous 13F-HR on February 17, 2026 disclosing 19,276 shares of Merck & Co., Inc.. This represents a change in shares of 77.74% 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.

Upgrade to unlock premium data and export to Excel .

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 34,262 14,986 77.74 4,121 106.67 0.0664
2026-02-17 2025-12-31 13F MERCK COM 58933Y105 19,276 -25,783 -57.22 1,995 -47.26 0.0337
2025-11-14 2025-09-30 13F MERCK COM 58933Y105 45,059 5,731 14.57 3,782 20.45 0.0683
2025-11-14 2025-06-30 13F/A-1 MERCK COM 58933Y105 39,328 6,614 20.22 3,140 6.01 0.0818
2025-07-25 2025-06-30 13F MERCK COM 58933Y105 39,328 6,614 3,140 0.0812
2025-05-08 2025-03-31 13F MERCK COM 58933Y105 32,714 -3,545 -9.78 2,962 -18.50 0.0994
2025-04-22 2024-12-31 13F/A-1 MERCK COM 58933Y105 36,259 -3,288 -8.31 3,633 -19.61 0.1183
2025-02-14 2024-12-31 13F MERCK COM 58933Y105 36,142 -3,405 3,595 0.1175
2025-04-22 2024-09-30 13F/A-1 MERCK COM 58933Y105 39,547 -4,079 -9.35 4,520 -16.84 0.1486
2024-10-30 2024-09-30 13F MERCK COM 58933Y105 18,386 -25,240 2,088 0.1845
2025-04-22 2024-06-30 13F/A-1 MERCK COM 58933Y105 43,626 286 0.66 5,434 -5.51 0.2043
2024-08-06 2024-06-30 13F MERCK COM 58933Y105 26,894 -16,446 3,329 0.2983
2025-04-22 2024-03-31 13F/A-1 MERCK COM 58933Y105 43,340 6,554 17.82 5,752 42.46 0.2207
2024-05-07 2024-03-31 13F MERCK COM 58933Y105 31,495 -5,291 4,156 0.3517
2025-04-22 2023-12-31 13F/A-1 MERCK COM 58933Y105 36,786 10,708 41.06 4,037 50.41 0.1689
2024-02-08 2023-12-31 13F MERCK COM 58933Y105 24,640 -1,438 2,686 0.2507
2023-10-24 2023-09-30 13F MERCK COM 58933Y105 26,078 4,748 22.26 2,685 9.06 0.2801
2023-08-02 2023-06-30 13F MERCK COM 58933Y105 21,330 1,098 5.43 2,461 14.36 0.2695
2023-05-04 2023-03-31 13F MERCK COM 58933Y105 20,232 -453 -2.19 2,152 -6.23 0.2291
2023-02-01 2022-12-31 13F MERCK COM 58933Y105 20,685 -347 -1.65 2,295 26.73 0.2612
2022-11-02 2022-09-30 13F MERCK COM 58933Y105 21,032 719 3.54 1,811 -2.21 0.2105
2022-08-04 2022-06-30 13F MERCK COM 58933Y105 20,313 575 2.91 1,852 14.39 0.1925
2022-05-05 2022-03-31 13F MERCK COM 58933Y105 19,738 1,718 9.53 1,619 17.23 0.1456
2022-02-07 2021-12-31 13F MERCK COM 58933Y105 18,020 -7,646 -29.79 1,381 -28.37 0.1035
2021-11-12 2021-09-30 13F MERCK COM 58933Y105 25,666 2,276 9.73 1,928 5.99 0.1576
2021-08-12 2021-06-30 13F MERCK COM 58933Y105 23,390 783 3.46 1,819 4.36 0.1519
2021-05-11 2021-03-31 13F MERCK & CO. COM 58933Y105 22,607 6,433 39.77 1,743 31.75 0.1585
2021-02-08 2020-12-31 13F MERCK & CO. COM 58933Y105 16,174 -337 -2.04 1,323 -3.43 0.1304
2020-11-12 2020-09-30 13F MERCK & CO. COM 58933Y105 16,511 7,899 91.72 1,370 105.71 0.1519
2020-08-13 2020-06-30 13F/A-1 MERCK & CO. COM 58933Y105 8,612 2,079 31.82 666 32.41 0.0789
2020-08-11 2020-06-30 13F MERCK & CO. COM 58933Y105 8,611 2,078 666 78,859.4041
2020-05-13 2020-03-31 13F MERCK & CO. COM 58933Y105 6,533 -2,362 -26.55 503 -37.82 0.0704
2020-02-12 2019-12-31 13F/A-1 MERCK COM 58933Y105 8,895 1,388 18.49 809 27.20 0.0855
2020-02-12 2019-12-31 13F MERCK COM 58933Y105 25,243 17,736 809 85,457.9872
2019-11-12 2019-09-30 13F MERCK COM 58933Y105 7,507 3,934 110.10 636 111.30 0.0867
2019-08-12 2019-06-30 13F MERCK COM 58933Y105 3,573 65 1.85 301 2.73 0.0861
2019-05-14 2019-03-31 13F MERCK COM 58933Y105 3,508 -54 -1.52 293 5.78 0.0772
2019-02-13 2018-12-31 13F MERCK COM 58933Y105 3,562 351 10.93 277 20.43 0.0826
2018-11-13 2018-09-30 13F MERCK COM 58933Y105 3,211 3,211 230 0.0663
2017-05-12 2017-03-31 13F MERCK COM 58933Y105 0 -3,810 -100.00 0 -100.00
2017-02-10 2016-12-31 13F MERCK COM 58933Y105 3,810 134 3.65 225 -2.60 0.0796
2016-11-14 2016-09-30 13F MERCK COM 58933Y105 3,676 3,676 231 0.0988
2016-08-10 2016-06-30 13F MERCK & CO INC COM 58933Y105 0 -3,862 -100.00 0 -100.00
2016-05-13 2016-03-31 13F MERCK & CO INC COM 58933Y105 3,862 45 1.18 206 0.98 0.1070
2016-02-11 2015-12-31 13F MERCK & CO INC COM 58933Y105 3,817 3,817 0.00 204 0.1195
2015-11-12 2015-09-30 13F MERCK & CO INC COM 58933Y105 0 -3,807 -100.00 0 -100.00
2015-08-13 2015-06-30 13F MERCK & CO INC COM 58933Y105 3,807 3,807 218 0.1008
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.