918 hedge funds and large institutions have $25.7B invested in Ameren in 2026 Q1 according to their latest regulatory filings, with 126 funds opening new positions, 371 increasing their positions, 230 reducing their positions, and 62 closing their positions.

New
Increased
Maintained
Reduced
Closed

more first-time investments, than exits

New positions opened: | Existing positions closed:

more repeat investments, than reductions

Existing positions increased: | Existing positions reduced:

more funds holding in top 10

Funds holding in top 10:

more capital invested

Capital invested by funds: $ → $

5% more funds holding

Funds holding: 876918 (+42)

1.08% less ownership

Funds ownership: 85.7%84.62% (-1.1%)

33% less call options, than puts

Call options by funds: $12.8M | Put options by funds: $19.1M

Holders
918
Holders Change
Holders Change %
% of All Funds
Holding in Top 10
7
Holding in Top 10 Change
Holding in Top 10 Change %
% of All Funds
New
Increased
Reduced
Closed
Calls
$12.8M
Puts
$19.1M
Net Calls
Net Calls Change

Top Buyers

1 +$343M
2 +$182M
3 +$104M
4
BlackRock
BlackRock
New York
+$88.8M
5
Balyasny Asset Management
Balyasny Asset Management
Illinois
+$75.8M
Name Holding Trade Value Shares
Change
Change in
Stake
CCMG
51
Clark Capital Management Group
Pennsylvania
$76.3M
Sumitomo Mitsui Trust Group
52
Sumitomo Mitsui Trust Group
Japan
$71.2M
HA
53
Homestead Advisers
Virginia
$70.1M
Mitsubishi UFJ Asset Management
54
Mitsubishi UFJ Asset Management
Japan
$68.5M
VGA
55
Vanguard Global Advisers
Pennsylvania
$66.4M
California Public Employees Retirement System
56
California Public Employees Retirement System
California
$65.6M
SEI Investments
57
SEI Investments
Pennsylvania
$65.4M
Manulife (Manufacturers Life Insurance)
58
Manulife (Manufacturers Life Insurance)
Ontario, Canada
$63.5M
UM
59
UniSuper Management
Australia
$60.2M
COPPSERS
60
Commonwealth of Pennsylvania Public School Employees Retirement System
Pennsylvania
$59.3M
EIP
61
Energy Income Partners
Connecticut
$58M
CCM
62
Chilton Capital Management
Texas
$56.8M
VAM
63
Vanguard Asset Management
$56.7M
Millennium Management
64
Millennium Management
New York
$56M
GF
65
Gabelli Funds
New York
$53M
RhumbLine Advisers
66
RhumbLine Advisers
Massachusetts
$50.5M
CBU
67
CIBC Bancorp USA
Illinois
$48M
HSBC Holdings
68
HSBC Holdings
United Kingdom
$47.4M
HHAM
69
HITE Hedge Asset Management
Massachusetts
$46.4M
YCM
70
Yaupon Capital Management
New York
$44.3M
National Pension Service
71
National Pension Service
South Korea
$42.9M
Adage Capital Partners
72
Adage Capital Partners
Massachusetts
$41.5M
Hudson Bay Capital Management
73
Hudson Bay Capital Management
Connecticut
$41.1M
QCM
74
Quantinno Capital Management
New York
$39.7M
Bank of Nova Scotia
75
Bank of Nova Scotia
Ontario, Canada
$39.3M