Merck & Co., Inc.
DE ˙ XTRA ˙ US58933Y1055
102,78 € ↑2,84 (2,84%)
2026-06-04
AKTIENPREIS
SecurityDE:6MK / Merck & Co., Inc.
InstitutionVestmark Advisory Solutions, Inc.
Latest Disclosed Ownership89,323 shares
Latest Disclosed Value $ 10,744,945
Vestmark Advisory Solutions, Inc. reports 35.58% increase in ownership of 6MK / Merck & Co., Inc.

On May 15, 2026 - Vestmark Advisory Solutions, Inc. filed a 13F-HR form disclosing ownership of 89,323 shares of Merck & Co., Inc. (DE:6MK) valued at $9,307,457 USD as of March 31, 2026. The entity filed a previous 13F-HR on February 6, 2026 disclosing 65,880 shares of Merck & Co., Inc.. This represents a change in shares of 35.58% during the quarter. The current value of the position is $9,180,618 USD.

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 89,323 23,443 35.58 10,745 54.95 0.0739
2026-02-06 2025-12-31 13F MERCK COM 58933Y105 65,880 35,029 113.54 6,935 167.83 0.0936
2025-11-10 2025-09-30 13F MERCK COM 58933Y105 30,851 -2,967 -8.77 2,589 -3.29 0.0494
2025-08-06 2025-06-30 13F MERCK COM 58933Y105 33,818 -7,948 -19.03 2,677 -28.58 0.0387
2025-05-13 2025-03-31 13F MERCK COM 58933Y105 41,766 -11,045 -20.91 3,749 -28.65 0.0965
2025-02-06 2024-12-31 13F MERCK COM 58933Y105 52,811 91 0.17 5,254 -12.25 0.1809
2024-11-14 2024-09-30 13F MERCK COM 58933Y105 52,720 2,633 5.26 5,987 -3.45 0.2229
2024-08-12 2024-06-30 13F MERCK COM 58933Y105 50,087 1,532 3.16 6,201 -3.22 0.2589
2024-05-15 2024-03-31 13F MERCK COM 58933Y105 48,555 91 0.19 6,407 21.26 0.2759
2024-02-06 2023-12-31 13F MERCK COM 58933Y105 48,464 1,459 3.10 5,284 9.18 0.2684
2023-11-06 2023-09-30 13F MERCK COM 58933Y105 47,005 -78,256 -62.47 4,839 -66.52 0.3518
2023-08-07 2023-06-30 13F MERCK COM 58933Y105 125,261 -2,317 -1.82 14,454 6.48 0.5504
2023-05-09 2023-03-31 13F MERCK COM 58933Y105 127,578 -4,201 -3.19 13,573 -7.17 0.5878
2023-01-20 2022-12-31 13F MERCK COM 58933Y105 131,779 977 0.75 14,621 29.80 0.7123
2022-11-03 2022-09-30 13F MERCK COM 58933Y105 130,802 20,059 18.11 11,264 11.56 0.6279
2022-08-04 2022-06-30 13F MERCK COM 58933Y105 110,743 22,995 26.21 10,097 40.24 0.5767
2022-04-27 2022-03-31 13F MERCK COM 58933Y105 87,748 -5,463 -5.86 7,200 0.78 0.4076
2022-01-31 2021-12-31 13F MERCK COM 58933Y105 93,211 -1,322 -1.40 7,144 0.62 0.4031
2021-11-15 2021-09-30 13F MERCK COM 58933Y105 94,533 8,724 10.17 7,100 6.40 0.4809
2021-08-09 2021-06-30 13F MERCK COM 58933Y105 85,809 5,162 6.40 6,673 7.33 0.4748
2021-05-10 2021-03-31 13F MERCK & CO. COM 58933Y105 80,647 2,437 3.12 6,217 -2.83 0.5515
2021-02-04 2020-12-31 13F MERCK & CO. COM 58933Y105 78,210 2,433 3.21 6,398 1.78 0.7179
2020-10-19 2020-09-30 13F MERCK & CO. COM 58933Y105 75,777 5,509 7.84 6,286 15.68 0.8445
2020-08-13 2020-06-30 13F MERCK & CO. COM 58933Y105 70,268 8,680 14.09 5,434 14.69 0.8408
2020-05-06 2020-03-31 13F MERCK & CO. COM 58933Y105 61,588 10,207 19.87 4,738 1.39 0.9262
2020-02-14 2019-12-31 13F MERCK COM 58933Y105 51,381 -1,799 -3.38 4,673 4.38 0.9589
2019-11-05 2019-09-30 13F MERCK COM 58933Y105 53,180 3,233 6.47 4,477 6.90 0.7259
2019-08-20 2019-06-30 13F MERCK COM 58933Y105 49,947 -428 -0.85 4,188 -0.05 0.7166
2019-05-14 2019-03-31 13F MERCK COM 58933Y105 50,375 50,375 4,190 0.7471
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.