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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
VPIM
326
Vanguard Personalized Indexing Management
California
$40.6M
AG
327
AIA Group
Hong Kong
$40.2M
PP
328
Prudential plc
United Kingdom
$40M
MHC
329
Meyer Handelman Company
New York
$39.8M
LA
330
LBP AM
France
$39.7M
EAM
331
Erste Asset Management
Austria
$39.5M
CPSAC
332
Chas P. Smith & Associates (CPS)
Florida
$39M
LBA
333
Letko, Brosseau & Associates
Quebec, Canada
$39M
MGP
334
M&G plc
United Kingdom
$39M
GT
335
Glenview Trust
Kentucky
$38.7M
SGA
336
Sector Gamma AS
Norway
$38.3M
CIA
337
Capital Investment Advisors
Georgia
$38.2M
ELC
338
Edgar Lomax Company
Virginia
$37.7M
SA
339
Sanctuary Advisors
Indiana
$37.6M
LWCFA
340
Loring Wolcott & Coolidge Fiduciary Advisors
Massachusetts
$37.2M
CI
341
Conning Inc
Connecticut
$37.2M
WPC
342
Waters Parkerson & Co
Louisiana
$37M
CA
343
Commerzbank Aktiengesellschaft
Germany
$36.9M
CS
344
Cannell & Spears
New York
$36.4M
CWM
345
CIBC World Markets
New York
$36.4M
SI
346
Stephens Inc
Arkansas
$36.2M
AAM
347
Advisors Asset Management
Colorado
$36.1M
NYLIM
348
New York Life Investment Management
New York
$35.8M
PI
349
PineBridge Investments
New York
$35.5M
UBP
350
Union Bancaire Privee
Switzerland
$35.5M