802 hedge funds and large institutions have $24B invested in Ameren in 2025 Q3 according to their latest regulatory filings, with 99 funds opening new positions, 319 increasing their positions, 225 reducing their positions, and 63 closing their positions.

New
Increased
Maintained
Reduced
Closed
Holders
802
Holders Change
Holders Change %
% of All Funds
Holding in Top 10
4
Holding in Top 10 Change
Holding in Top 10 Change %
% of All Funds
New
Increased
Reduced
Closed
Calls
$15.4M
Puts
$4.12M
Net Calls
Net Calls Change
Name Holding Trade Value Shares
Change
Change in
Stake
Bank of New York Mellon
26
Bank of New York Mellon
New York
$161M
Jennison Associates
27
Jennison Associates
New York
$153M
AP
28
Antipodes Partners
Australia
$143M
UBS AM
29
UBS AM
Illinois
$134M
Barclays
30
Barclays
United Kingdom
$134M
DPIM
31
Duff & Phelps Investment Management
Illinois
$131M
SCP
32
Soroban Capital Partners
New York
$130M
Dimensional Fund Advisors
33
Dimensional Fund Advisors
Texas
$114M
ECM
34
ExodusPoint Capital Management
New York
$103M
WHRC
35
W.H. Reaves & Co
New Jersey
$101M
First Trust Advisors
36
First Trust Advisors
Illinois
$97.2M
UBS Group
37
UBS Group
Switzerland
$97M
California Public Employees Retirement System
38
California Public Employees Retirement System
California
$88.4M
Deutsche Bank
39
Deutsche Bank
Germany
$84.1M
Squarepoint
40
Squarepoint
New York
$83.9M
Swiss National Bank
41
Swiss National Bank
Switzerland
$83M
Marshall Wace
42
Marshall Wace
United Kingdom
$81.3M
ZP
43
Zimmer Partners
New York
$78.2M
HA
44
Homestead Advisers
Virginia
$76.6M
HHAM
45
HITE Hedge Asset Management
Massachusetts
$74.6M
Caisse de Depot et Placement du Quebec (CDPQ)
46
Caisse de Depot et Placement du Quebec (CDPQ)
Quebec, Canada
$73.3M
Sumitomo Mitsui Trust Group
47
Sumitomo Mitsui Trust Group
Japan
$69.4M
Manulife (Manufacturers Life Insurance)
48
Manulife (Manufacturers Life Insurance)
Ontario, Canada
$64.6M
COPPSERS
49
Commonwealth of Pennsylvania Public School Employees Retirement System
Pennsylvania
$58M
UM
50
UniSuper Management
Australia
$56.9M