870 hedge funds and large institutions have $23.1B invested in Ameren in 2025 Q4 according to their latest regulatory filings, with 137 funds opening new positions, 335 increasing their positions, 236 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:

0.44% more ownership

Funds ownership: 85.26%85.69% (+0.44%)

4% less capital invested

Capital invested by funds: $24.1B → $23.1B (-$908M)

40% less call options, than puts

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

Holders
870
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
GIA
76
Gateway Investment Advisers
Ohio
$34.5M
California State Teachers Retirement System (CalSTRS)
77
California State Teachers Retirement System (CalSTRS)
California
$32.6M
Principal Financial Group
78
Principal Financial Group
Iowa
$32.4M
Victory Capital Management
79
Victory Capital Management
Texas
$31.9M
FGP
80
Freestone Grove Partners
California
$29.2M
Schroder Investment Management Group
81
Schroder Investment Management Group
United Kingdom
$28.8M
Verition Fund Management
82
Verition Fund Management
Connecticut
$28.6M
Hudson Bay Capital Management
83
Hudson Bay Capital Management
Connecticut
$28.2M
Russell Investments Group
84
Russell Investments Group
United Kingdom
$28M
WorldQuant Millennium Advisors
85
WorldQuant Millennium Advisors
New York
$27.9M
CVA
86
Ceredex Value Advisors
Florida
$25.9M
MF
87
Milford Funds
$24.5M
New York State Teachers Retirement System (NYSTRS)
88
New York State Teachers Retirement System (NYSTRS)
New York
$24.2M
State Board of Administration of Florida Retirement System
89
State Board of Administration of Florida Retirement System
Florida
$24.1M
Renaissance Technologies
90
Renaissance Technologies
New York
$24M
MAM
91
Magellan Asset Management
Australia
$22.8M
Korea Investment Corp
92
Korea Investment Corp
South Korea
$22.8M
LPL Financial
93
LPL Financial
California
$22.7M
Raymond James Financial
94
Raymond James Financial
Florida
$20.9M
QCM
95
Quantinno Capital Management
New York
$20.5M
GAM
96
Gotham Asset Management
New York
$19.2M
Tudor Investment Corp
97
Tudor Investment Corp
Connecticut
$19.1M
AIMCA
98
Alberta Investment Management Corp (AIMCo)
Alberta, Canada
$19M
BSA
99
Braun Stacey Associates
New York
$18.8M
NEI
100
Northwest & Ethical Investments
Ontario, Canada
$18.8M