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MRK — MERCK & CO INC

Reported value held$137.43B
Funds holding (latest)64
SectorHealth Care

Index member: S&P 500

Funds holding (Q2 2026)51
Institutional value$109.45B · 870.34M sh
New / Add / Cut / Exit3 / 18 / 25 / 1
Top-5 / Top-10 concentration56.0% / 75.1%
Institutional holdings change Accumulating +3.5% (+29.50M sh)
Institutional value change Up +11.3%

As of Q2 2026, 51 SEC-registered investment managers reported holding MRK (MERCK & CO INC) in their latest 13F filings, with a combined reported value of $109.45B across 870.34M shares. That is +3.5% by share count (+29.50M shares) versus the previous quarter, while reported value moved +11.3%. Ownership is concentrated: the five largest holders account for 56.0% of reported value and the top ten for 75.1%.

Compared with the prior quarter, 3 opened new positions, 18 added to existing stakes, 25 trimmed, 1 exited entirely. 13F holdings are quarter-end snapshots, so these moves reflect positioning as of Q2 2026, not real-time trading.

MRK is a constituent of the S&P 500 and is classified in the Health Care sector.

All figures on this page are computed from SEC Form 13F quarterly filings. 13F filers disclose long positions of $100,000 or more within 45 days of quarter end; short positions, options overlays and intra-quarter trades are not included, so treat the numbers as a quarterly snapshot of institutional ownership rather than real-time positioning.

FundQuarterSharesValuePortfolio WeightChange
BlackRock Inc history Q2 2026 227.00M $29.17B 0.46% Hold
Vanguard Group history Q4 2025 254.32M $26.77B 0.39% Add
Wellington Management Group history Q2 2026 86.25M $11.08B 2.02% Add
Geode Capital Management history Q2 2026 60.74M $7.79B 0.42% Add
Charles Schwab Investment Management history Q2 2026 54.37M $6.99B 0.93% Add
Morgan Stanley history Q2 2026 48.64M $6.25B 0.35% Add
Fidelity Management & Research (FMR) history Q2 2026 45.44M $5.84B 0.28% Add
Norges Bank Investment Management history Q2 2026 36.98M $4.75B 0.47% Reduce
Bank of America Corp history Q2 2026 30.54M $3.92B 0.26% Reduce
Northern Trust Corp history Q2 2026 26.28M $3.38B 0.39% Reduce
Goldman Sachs Group history Q2 2026 23.64M $3.04B 0.27% Add
Franklin Resources history Q2 2026 19.55M $2.51B 0.57% Add
Legal & General Investment Management America history Q2 2026 18.87M $2.43B 0.51% Reduce
Invesco Ltd history Q2 2026 18.61M $2.39B 0.20% Reduce
BNY Mellon history Q2 2026 18.34M $2.36B 0.39% Reduce
UBS Group AG history Q2 2026 14.79M $1.90B 0.26% Add
Amundi US history Q2 2026 12.34M $1.59B 0.39% Reduce
Harris Associates (Oakmark) history Q2 2026 12.07M $1.55B 2.06% Reduce
Wells Fargo & Co history Q2 2026 12.04M $1.55B 0.26% Hold
Deutsche Bank AG history Q2 2026 11.96M $1.54B 0.47% Reduce

View all 64 fund holders →

New Positions (Q2 2026)

Fully Exited (vs previous quarter)

Fund Position History — shares by quarter (top 20 funds)

FundQ3 2021Q4 2021Q1 2022Q2 2022Q3 2022Q4 2022Q1 2023Q2 2023Q3 2023Q4 2023Q1 2024Q2 2024Q3 2024Q4 2024Q1 2025Q2 2025Q3 2025Q4 2025Q1 2026Q2 2026
BlackRock Inc — — — — — — — — — — — — 212.98M 222.08M 225.40M 218.34M 214.88M 219.10M 225.93M 227.00M
Wellington Management Group 49.56M 49.87M 45.70M 40.72M 40.16M 62.02M 68.56M 77.25M 82.44M 85.60M 86.35M 72.48M 75.81M 80.74M 81.67M 76.86M 75.28M 86.44M 84.31M 86.25M
Geode Capital Management 42.74M 48.15M 44.41M 45.99M 48.10M 48.34M 51.22M 52.72M 54.07M 55.43M 56.41M 57.02M 59.16M 61.18M 59.66M 58.95M 59.80M 60.05M 59.56M 60.74M
Charles Schwab Investment Management 27.50M 29.00M 30.08M 29.52M 30.95M 29.98M 30.67M 30.71M 31.95M 36.68M 17.65M 18.29M 18.81M 20.13M 49.23M 53.87M 53.70M 48.56M 49.77M 54.37M
Morgan Stanley 26.14M 29.42M 25.49M 37.98M 37.85M 41.85M 39.04M 39.17M 38.59M 40.13M 41.51M 42.22M 44.39M 44.18M 43.11M 44.20M 44.59M 44.95M 47.63M 48.64M
Fidelity Management & Research (FMR) 10.69M 14.07M 14.53M 22.35M 23.20M 27.45M 35.73M 38.96M 38.15M 42.80M 52.17M 50.65M 49.71M 37.36M 31.81M 31.57M 33.43M 40.84M 44.52M 45.44M
Norges Bank Investment Management — — — — — 24.66M — — — 28.51M — 33.81M — 34.98M — 36.11M — 37.98M — 36.98M
Bank of America Corp 38.33M 37.70M 37.48M 42.25M 43.05M 42.93M 42.54M 40.01M 38.04M 40.58M 38.52M 41.90M 40.81M 38.66M 35.09M 32.71M 29.95M 27.85M 30.77M 30.54M
Northern Trust Corp 31.03M 30.01M 29.74M 29.95M 29.89M 30.21M 30.49M 28.67M 29.86M 28.49M 27.10M 26.82M 26.87M 31.38M 30.39M 28.75M 27.93M 27.23M 27.09M 26.28M
Goldman Sachs Group 10.96M 9.59M 12.41M 14.81M 13.43M 12.78M 13.90M 13.86M 13.94M 12.82M 12.11M 12.80M 15.59M 17.21M 14.48M 18.93M 15.16M 20.68M 21.83M 23.64M
Franklin Resources 39.26M 34.06M 18.21M 11.49M 10.49M 6.22M 6.10M 6.94M 9.50M 10.11M 17.69M 14.21M 16.11M 19.87M 21.90M 27.03M 16.75M 16.06M 16.27M 19.55M
Legal & General Investment Management America 19.12M 19.10M 20.30M 20.28M 19.70M 19.19M 19.59M 20.69M 20.14M 23.49M 23.38M 23.43M 23.55M 19.48M 19.76M 19.50M 20.66M 19.78M 19.54M 18.87M
Invesco Ltd 19.46M 20.20M 20.05M 19.45M 17.65M 17.92M 18.95M 21.40M 17.67M 16.76M 16.06M 15.80M 12.60M 15.45M 15.30M 17.02M 19.84M 20.55M 21.86M 18.61M
BNY Mellon 29.33M 30.97M 32.79M 32.58M 31.05M 30.40M 29.15M 26.72M 24.99M 20.83M 19.64M 19.15M 18.66M 24.21M 23.13M 22.00M 21.79M 19.16M 18.71M 18.34M
UBS Group AG 12.81M 13.85M 13.13M 13.00M 12.58M 14.70M 14.48M 13.86M 13.24M 14.79M 15.10M 15.83M 17.31M 18.89M 22.91M 18.33M 18.50M 20.10M 14.66M 14.79M
Amundi US 8.88M 6.92M 8.43M 7.62M 11.04M 10.51M 12.45M 12.80M 14.55M 12.38M 12.67M 12.95M 16.07M 9.54M 13.08M 16.53M 15.21M 13.39M 13.76M 12.34M
Harris Associates (Oakmark) — — — — — — — — — — — — 2.94M 6.24M 7.47M 9.13M 9.82M 14.09M 12.37M 12.07M
Wells Fargo & Co 75.20K 158.50K 20.31M 19.46M 19.61M 18.52M 17.91M 17.63M 16.44M 16.55M 16.52M 15.68M 14.99M 14.89M 11.98M 11.53M 11.78M 11.76M 12.00M 12.04M
Deutsche Bank AG 21.83M 21.60M 23.14M 21.78M 21.41M 20.79M 22.68M 21.52M 19.32M 21.57M 21.24M 20.80M 19.57M 19.25M 19.17M 17.04M 16.85M 12.79M 12.54M 11.96M
Citadel Advisors 9.20M 10.00M 8.96M 7.38M 9.32M 10.36M 5.69M 5.72M 11.04M 10.39M 12.14M 11.93M 11.11M 10.53M 11.06M 10.30M 10.77M 14.10M 13.12M 9.18M

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