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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
SOMRS
226
State of Michigan Retirement System
Michigan
$76.3M
SMDAM
227
Sumitomo Mitsui DS Asset Management
Japan
$76.1M
CIBC Asset Management
228
CIBC Asset Management
Ontario, Canada
$75.9M
Calamos Advisors
229
Calamos Advisors
Illinois
$75.8M
Nisa Investment Advisors
230
Nisa Investment Advisors
Missouri
$75.4M
EIP
231
Epoch Investment Partners
New York
$74.8M
TAF
232
Tredje AP-fonden
Sweden
$74.7M
ORIO
233
Old Republic International (ORI)
Illinois
$74.3M
PAM
234
Panagora Asset Management
Massachusetts
$74.3M
ASRS
235
Arizona State Retirement System
Arizona
$73.9M
EF
236
Empowered Funds
Pennsylvania
$72.2M
CCM
237
Compass Capital Management
Minnesota
$71.8M
HPG
238
Harvest Portfolios Group
Ontario, Canada
$70.5M
Boston Partners
239
Boston Partners
Massachusetts
$70.4M
CBUSF
240
Construction & Building Unions Superannuation Fund
Australia
$69.4M
Fidelity International
241
Fidelity International
Bermuda
$69.1M
CNB
242
Czech National Bank
Czech Republic
$68.9M
CAM
243
Cacti Asset Management
Georgia
$68.8M
A
244
AustralianSuper
Australia
$68.2M
ProShare Advisors
245
ProShare Advisors
Maryland
$66.2M
FWIA
246
Fort Washington Investment Advisors
Ohio
$66.2M
HF
247
HRT Financial
New York
$64.5M
HWA
248
Heritage Wealth Advisors
Virginia
$64.3M
AF
249
Align Financial
Minnesota
$63.9M
JG
250
Jain Global
New York
$63.8M