861 hedge funds and large institutions have $23.1B invested in Ameren in 2025 Q4 according to their latest regulatory filings, with 131 funds opening new positions, 334 increasing their positions, 235 reducing their positions, and 70 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 repeat investments, than reductions

Existing positions increased: | Existing positions reduced:

more funds holding

Funds holding:

0.26% more ownership

Funds ownership: 85.26%85.52% (+0.26%)

4% less capital invested

Capital invested by funds: $24.1B → $23.1B (-$955M)

40% less call options, than puts

Call options by funds: $19.8M | Put options by funds: $32.8M

Holders
861
Holders Change
Holders Change %
% of All Funds
Holding in Top 10
6
Holding in Top 10 Change
Holding in Top 10 Change %
% of All Funds
New
Increased
Reduced
Closed
Calls
$19.8M
Puts
$32.8M
Net Calls
Net Calls Change
Name Holding Trade Value Shares
Change
Change in
Stake
Natixis Advisors
151
Natixis Advisors
Massachusetts
$7.77M
ASRS
152
Arizona State Retirement System
Arizona
$7.41M
PCM
153
Polymer Capital Management
New York
$7.21M
Ensign Peak Advisors
154
Ensign Peak Advisors
Utah
$7.19M
CNB
155
Czech National Bank
Czech Republic
$7.12M
Wealthfront Advisers
156
Wealthfront Advisers
California
$7.09M
SOMRS
157
State of Michigan Retirement System
Michigan
$7.07M
MMA
158
Mizuho Markets Americas
New York
$6.99M
Public Sector Pension Investment Board (PSP Investments)
159
Public Sector Pension Investment Board (PSP Investments)
Quebec, Canada
$6.9M
Robeco Institutional Asset Management
160
Robeco Institutional Asset Management
Netherlands
$6.8M
ProShare Advisors
161
ProShare Advisors
Maryland
$6.65M
Comerica Bank
162
Comerica Bank
Texas
$6.51M
MIM
163
MetLife Investment Management
New Jersey
$6.47M
VOYA Investment Management
164
VOYA Investment Management
Georgia
$6.33M
PNC Financial Services Group
165
PNC Financial Services Group
Pennsylvania
$6.09M
Mariner
166
Mariner
Kansas
$6.08M
RAM
167
RWC Asset Management
United Kingdom
$6.05M
BPAMU
168
BTG Pactual Asset Management US
New York
$6.01M
First Manhattan
169
First Manhattan
New York
$6M
Stifel Financial
170
Stifel Financial
Missouri
$5.96M
II
171
IFM Investors
Australia
$5.95M
Retirement Systems of Alabama
172
Retirement Systems of Alabama
Alabama
$5.75M
QCM
173
QRG Capital Management
Illinois
$5.6M
Daiwa Securities Group
174
Daiwa Securities Group
Japan
$5.55M
Nisa Investment Advisors
175
Nisa Investment Advisors
Missouri
$5.43M