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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
AO
1051
Advisor OS
Illinois
$4.45M
MIM
1052
Morningstar Investment Management
Illinois
$4.45M
CHAM
1053
Clear Harbor Asset Management
Connecticut
$4.44M
CIP
1054
Castlefield Investment Partners
$4.43M
BOH
1055
Bank of Hawaii
Hawaii
$4.42M
Kovitz Investment Group Partners
1056
Kovitz Investment Group Partners
Illinois
$4.41M
SIM
1057
Studio Investment Management
Illinois
$4.4M
OC
1058
Oakworth Capital
Alabama
$4.4M
SW
1059
Simplicity Wealth
New Jersey
$4.39M
PCG
1060
Prosperity Consulting Group
Maryland
$4.39M
Parallax Volatility Advisers
1061
Parallax Volatility Advisers
California
$4.39M
SI
1062
Sava Infond
Slovenia
$4.39M
SAG
1063
SageView Advisory Group
California
$4.38M
VIA
1064
Vickerman Investment Advisors
Washington
$4.36M
SB
1065
SIG Brokerage
New York
$4.36M
RC
1066
Roundview Capital
New Jersey
$4.35M
CBTWT
1067
Community Bank & Trust (Waco, Texas)
Texas
$4.35M
NG
1068
Norden Group
Utah
$4.33M
BBA
1069
BLB&B Advisors
Pennsylvania
$4.33M
DAS
1070
Dynamic Advisor Solutions
Arizona
$4.32M
KF
1071
Krilogy Financial
Missouri
$4.31M
WA
1072
WealthTrust Axiom
Pennsylvania
$4.28M
AAIM
1073
Asset Advisors Investment Management
Georgia
$4.26M
CIP
1074
Convergence Investment Partners
Florida
$4.24M
JIC
1075
Joel Isaacson & Co
New York
$4.19M