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3,648 hedge funds and large institutions have $207B invested in Merck in 2025 Q4 according to their latest regulatory filings, with 544 funds opening new positions, 1,372 increasing their positions, 1,398 reducing their positions, and 131 closing their positions.

New
Increased
Maintained
Reduced
Closed

more first-time investments, than exits

New positions opened: | Existing positions closed:

more funds holding in top 10

Funds holding in top 10:

more call options, than puts

Call options by funds: $ | Put options by funds: $

more capital invested

Capital invested by funds: $ → $

10% more funds holding

Funds holding: 3,3073,648 (+341)

2.9% more ownership

Funds ownership: 76.23%79.13% (+2.9%)

2% less repeat investments, than reductions

Existing positions increased: 1,372 | Existing positions reduced: 1,398

Holders
3,648
Holders Change
Holders Change %
% of All Funds
Holding in Top 10
77
Holding in Top 10 Change
Holding in Top 10 Change %
% of All Funds
New
Increased
Reduced
Closed
Calls
$3.76B
Puts
$2.62B
Net Calls
Net Calls Change

Top Buyers

1 +$1.05B
2 +$696M
3 +$567M
4
Citadel Advisors
Citadel Advisors
Florida
+$549M
5
Jennison Associates
Jennison Associates
New York
+$522M
Name Holding Trade Value Shares
Change
Change in
Stake
Qube Research & Technologies (QRT)
3651
Qube Research & Technologies (QRT)
United Kingdom
Zurich Cantonal Bank
3652
Zurich Cantonal Bank
Switzerland
DM
3653
Deerfield Management
New York
Voloridge Investment Management
3654
Voloridge Investment Management
Florida
Tudor Investment Corp
3655
Tudor Investment Corp
Connecticut
DK
3656
DJE Kapital
Germany
ACM
3657
Aquatic Capital Management
Illinois
TLP
3658
Tri Locum Partners
New York
RL
3659
Ruffer LLP
United Kingdom
DRZID
3660
DePrince Race & Zollo Inc (DRZ)
Florida
SCM
3661
Suvretta Capital Management
New York
NCM
3662
Nearwater Capital Markets
Ireland
SCM
3663
Sio Capital Management
New York
PP
3664
Prospector Partners
Connecticut
OC
3665
Optimas Capital
Hong Kong
WG
3666
Winton Group
United Kingdom
ET
3667
Entropy Technologies
New York
NSEDCP
3668
NJ State Employees Deferred Compensation Plan
New Jersey
BJL
3669
Brighton Jones LLC
Washington
ELI
3670
Empire Life Investments
Ontario, Canada
QT
3671
Quantbot Technologies
New York
LOIM
3672
Liberty One Investment Management
Illinois
IFU
3673
iSAM Funds (UK)
United Kingdom
Group One Trading
3674
Group One Trading
Illinois
AAMU
3675
APG Asset Management US
New York