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879 hedge funds and large institutions have $23.2B invested in Ameren in 2025 Q4 according to their latest regulatory filings, with 142 funds opening new positions, 336 increasing their positions, 238 reducing their positions, and 70 closing their positions.

New
Increased
Maintained
Reduced
Closed

103% more first-time investments, than exits

New positions opened: 142 | Existing positions closed: 70

50% more funds holding in top 10

Funds holding in top 10: 46 (+2)

41% more repeat investments, than reductions

Existing positions increased: 336 | Existing positions reduced: 238

7% more funds holding

Funds holding: 823879 (+56)

0.45% more ownership

Funds ownership: 85.26%85.71% (+0.45%)

4% less capital invested

Capital invested by funds: $24.1B → $23.2B (-$905M)

40% less call options, than puts

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

Holders
879
Holders Change
+56
Holders Change %
+6.8%
% of All Funds
10.7%
Holding in Top 10
6
Holding in Top 10 Change
+2
Holding in Top 10 Change %
+50%
% of All Funds
0.07%
New
142
Increased
336
Reduced
238
Closed
70
Calls
$19.8M
Puts
$32.8M
Net Calls
-$13M
Net Calls Change
-$24.3M
Name Holding Trade Value Shares
Change
Change in
Stake
GIA
76
Gateway Investment Advisers
Ohio
$34.5M +$143K +1,399 +0.4%
California State Teachers Retirement System (CalSTRS)
77
California State Teachers Retirement System (CalSTRS)
California
$32.6M -$584K -5,694 -2%
Principal Financial Group
78
Principal Financial Group
Iowa
$32.4M +$764K +7,451 +2%
Victory Capital Management
79
Victory Capital Management
Texas
$31.9M +$1.68M +16,344 +5%
FGP
80
Freestone Grove Partners
California
$29.2M +$30M +292,386 New
Schroder Investment Management Group
81
Schroder Investment Management Group
United Kingdom
$28.8M -$1.03M -10,012 -3%
Verition Fund Management
82
Verition Fund Management
Connecticut
$28.6M +$8.48M +82,676 +41%
Hudson Bay Capital Management
83
Hudson Bay Capital Management
Connecticut
$28.2M +$496K +4,839 +2%
Russell Investments Group
84
Russell Investments Group
United Kingdom
$28M -$37.3K -364 -0.1%
WorldQuant Millennium Advisors
85
WorldQuant Millennium Advisors
New York
$27.9M +$26.1K +255 +0.1%
CVA
86
Ceredex Value Advisors
Florida
$25.9M -$23.1M -224,891 -46%
MF
87
Milford Funds
$24.5M +$25.2M +245,838 New
New York State Teachers Retirement System (NYSTRS)
88
New York State Teachers Retirement System (NYSTRS)
New York
$24.2M -$10.3K -100 -0%
State Board of Administration of Florida Retirement System
89
State Board of Administration of Florida Retirement System
Florida
$24.1M -$865K -8,440 -3%
Renaissance Technologies
90
Renaissance Technologies
New York
$24M +$24.7M +240,800 New
MAM
91
Magellan Asset Management
Australia
$22.8M +$313K +3,057 +1%
Korea Investment Corp
92
Korea Investment Corp
South Korea
$22.8M +$1.8M +17,520 +8%
LPL Financial
93
LPL Financial
California
$22.7M +$8.43M +82,178 +57%
Raymond James Financial
94
Raymond James Financial
Florida
$20.9M -$285K -2,775 -1%
QCM
95
Quantinno Capital Management
New York
$20.5M +$7.12M +69,436 +51%
GAM
96
Gotham Asset Management
New York
$19.2M +$12.4M +121,400 +171%
Tudor Investment Corp
97
Tudor Investment Corp
Connecticut
$19.1M +$3.61M +35,217 +23%
AIMCA
98
Alberta Investment Management Corp (AIMCo)
Alberta, Canada
$19M +$19.5M +190,000 New
BSA
99
Braun Stacey Associates
New York
$18.8M -$39.7K -387 -0.2%
NEI
100
Northwest & Ethical Investments
Ontario, Canada
$18.8M -$949K -9,255 -5%