Merck & Co., Inc.
MX ˙ BMV ˙ US58933Y1055
SecurityMX:MRK / Merck & Co., Inc.
InstitutionMercer Global Advisors Inc /adv
Latest Disclosed Ownership785,937 shares
Latest Disclosed Value $ 94,540,373
Mercer Global Advisors Inc /adv reports 1.38% increase in ownership of MRK / Merck & Co., Inc.

On May 15, 2026 - Mercer Global Advisors Inc /adv filed a 13F-HR form disclosing ownership of 785,937 shares of Merck & Co., Inc. (MX:MRK) valued at $94,540,373 USD as of March 31, 2026. The entity filed a previous 13F-HR on February 17, 2026 disclosing 775,210 shares of Merck & Co., Inc.. This represents a change in shares of 1.38% 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 785,937 10,727 1.38 94,540 15.86 0.1399
2026-02-17 2025-12-31 13F MERCK COM 58933Y105 775,210 59,159 8.26 81,599 35.77 0.1244
2025-11-14 2025-09-30 13F MERCK COM 58933Y105 716,051 101,040 16.43 60,098 23.44 0.1003
2025-08-14 2025-06-30 13F MERCK COM 58933Y105 615,011 -6,567 -1.06 48,686 -12.73 0.0992
2025-05-15 2025-03-31 13F MERCK COM 58933Y105 621,578 -11,628 -1.84 55,785 -11.44 0.1280
2025-02-14 2024-12-31 13F MERCK COM 58933Y105 633,206 -138,127 -17.91 62,991 -28.70 0.1537
2024-11-14 2024-09-30 13F MERCK COM 58933Y105 771,333 6,990 0.91 88,346 11.71 0.2068
2024-08-12 2024-06-30 13F MERCK COM 58933Y105 764,343 18,856 2.53 79,085 80,597.96 0.2156
2024-05-15 2024-03-31 13F MERCK COM 58933Y105 745,487 31,424 4.40 98 27.27 0.2798
2024-02-15 2023-12-31 13F MERCK COM 58933Y105 714,063 132,152 22.71 78 30.51 0.2342
2023-11-15 2023-09-30 13F/A-1 MERCK & COM 58933Y105 581,911 -19,181 -3.19 60 -14.49 0.2275
2023-11-14 2023-09-30 13F MERCK & COM 58933Y105 581,911 -19,181 60 0.2274
2023-08-14 2023-06-30 13F MERCK COM 58933Y105 601,092 66,911 12.53 69 23.21 0.2753
2023-05-16 2023-03-31 13F MERCK COM 58933Y105 534,181 39,455 7.98 57 3.70 0.2581
2023-02-09 2022-12-31 13F MERCK & CO. COM 58933Y105 494,726 67,226 15.73 55 -99.85 0.2749
2022-11-15 2022-09-30 13F MERCK & CO. COM 58933Y105 427,500 69,007 19.25 36,808 12.62 0.2184
2022-08-10 2022-06-30 13F MERCK & CO. COM 58933Y105 358,493 106,771 42.42 32,684 58.25 0.2001
2022-05-10 2022-03-31 13F MERCK & CO. COM 58933Y105 251,722 31,432 14.27 20,654 22.34 0.1216
2022-02-04 2021-12-31 13F MERCK & CO. COM 58933Y105 220,290 9,530 4.52 16,883 6.65 0.1042
2021-11-10 2021-09-30 13F MERCK & CO. COM 58933Y105 210,760 9,731 4.84 15,830 1.25 0.1106
2021-08-10 2021-06-30 13F MERCK & CO. COM 58933Y105 201,029 9,381 4.89 15,634 5.82 0.1202
2021-08-10 2021-03-31 13F/A-1 MERCK & CO. COM 58933Y105 191,648 18,505 10.69 14,774 4.31 0.1344
2021-05-11 2021-03-31 13F MERCK & CO. COM 58933Y105 180,610 7,467 13,923 0.1333
2021-02-12 2020-12-31 13F MERCK & CO. COM 58933Y105 173,143 14,653 9.25 14,163 7.73 0.1769
2020-12-10 2020-09-30 13F MERCK & CO. COM 58933Y105 158,490 14,353 9.96 13,147 17.95 0.1978
2020-08-10 2020-06-30 13F MERCK & CO. COM 58933Y105 144,137 5,972 4.32 11,146 4.85 0.2024
2020-05-18 2020-03-31 13F MERCK & CO. COM 58933Y105 138,165 49,446 55.73 10,630 31.74 0.2340
2020-02-13 2019-12-31 13F MERCK & CO INC COM COM 58933Y105 88,719 -1,698 -1.88 8,069 6.02 0.1611
2019-11-12 2019-09-30 13F MERCK & CO INC COM COM 58933Y105 90,417 10,788 13.55 7,611 13.99 0.1790
2019-08-14 2019-06-30 13F MERCK & CO INC COM COM 58933Y105 79,629 3,308 4.33 6,677 5.18 0.1770
2019-04-23 2019-03-31 13F/A-1 MERCK & CO INC COM COM 58933Y105 76,321 76,321 6,348 0.2283
2019-04-12 2019-03-31 13F MERCK & CO INC COM COM 58933Y105 73,764 5,636 0.3003
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.