MADISON, WI
ALLIANT ENERGY CORPLNT— Latest position per institution from SEC 13F filings
15
Institutional holders
228.62M
Total shares held
15.30B
Estimated value
11.43M
Avg. position size
VANGUARD GROUP INC
CIK 102909
Shares
33.79M
Value
2.20B
Filed
Dec 31, 2025
BLACKROCK, INC.
CIK 2012383
Shares
24.99M
Value
1.91B
Filed
Jun 30, 2026
BLACKROCK FINANCE, INC.
CIK 1364742
Shares
23.52M
Value
1.20B
Filed
Jun 30, 2024
STATE STREET CORP
CIK 93751
Shares
17.57M
Value
1.34B
Filed
Jun 30, 2026
VANGUARD CAPITAL MANAGEMENT LLC
CIK 2100119
Shares
16.86M
Value
1.29B
Filed
Jun 30, 2026
VANGUARD PORTFOLIO MANAGEMENT LLC
CIK 2100121
Shares
14.39M
Value
1.10B
Filed
Jun 30, 2026
PRICE T ROWE ASSOCIATES INC /MD/
CIK 80255
Shares
11.52M
Value
878.50K
Filed
Jun 30, 2026
JANUS HENDERSON GROUP LTD.
CIK 1274173
Shares
11.27M
Value
809M
Filed
Mar 31, 2026
JUPITER TOPCO LLC
CIK 2146052
Shares
10.98M
Value
837.47M
Filed
Jun 30, 2026
NUVEEN ASSET MANAGEMENT, LLC
CIK 1521019
Shares
8.07M
Value
477.44M
Filed
Dec 31, 2024
NUVEEN, LLC
CIK 1871926
Shares
7.89M
Value
602M
Filed
Jun 30, 2026
GEODE CAPITAL MANAGEMENT, LLC
CIK 1214717
Shares
7.41M
Value
563.05M
Filed
Jun 30, 2026
MASSACHUSETTS FINANCIAL SERVICES CO /MA/
CIK 912938
Shares
6.94M
Value
533.76M
Filed
Jun 30, 2026
VICTORY CAPITAL MANAGEMENT INC
CIK 1040188
Shares
6.44M
Value
491.49M
Filed
Jun 30, 2026
BANK OF AMERICA CORP /DE/
CIK 70858
Shares
5.58M
Value
425.90M
Filed
Jun 30, 2026
FMR LLC
CIK 315066
Shares
5.04M
Value
384.79M
Filed
Jun 30, 2026
INVESCO LTD.
CIK 914208
Shares
4.91M
Value
374.77M
Filed
Jun 30, 2026
PICTET ASSET MANAGEMENT SA
CIK 1361570
Shares
4.18M
Value
219.49M
Filed
Jun 30, 2023
FRANKLIN TEMPLETON INC
CIK 38777
Shares
3.88M
Value
296.08M
Filed
Jun 30, 2026
MORGAN STANLEY
CIK 895421
Shares
3.39M
Value
258.80M
Filed
Jun 30, 2026
| # | Institution | CIK | Shares | Est. Value | Period |
|---|---|---|---|---|---|
| 1 | VANGUARD GROUP INC | 102909 | 33.79M | 2.20B | Dec 31, 2025 |
| 2 | BLACKROCK, INC. | 2012383 | 24.99M | 1.91B | Jun 30, 2026 |
| 3 | BLACKROCK FINANCE, INC. | 1364742 | 23.52M | 1.20B | Jun 30, 2024 |
| 4 | STATE STREET CORP | 93751 | 17.57M | 1.34B | Jun 30, 2026 |
| 5 | VANGUARD CAPITAL MANAGEMENT LLC | 2100119 | 16.86M | 1.29B | Jun 30, 2026 |
| 6 | VANGUARD PORTFOLIO MANAGEMENT LLC | 2100121 | 14.39M | 1.10B | Jun 30, 2026 |
| 7 | PRICE T ROWE ASSOCIATES INC /MD/ | 80255 | 11.52M | 878.50K | Jun 30, 2026 |
| 8 | JANUS HENDERSON GROUP LTD. | 1274173 | 11.27M | 809M | Mar 31, 2026 |
| 9 | JUPITER TOPCO LLC | 2146052 | 10.98M | 837.47M | Jun 30, 2026 |
| 10 | NUVEEN ASSET MANAGEMENT, LLC | 1521019 | 8.07M | 477.44M | Dec 31, 2024 |
| 11 | NUVEEN, LLC | 1871926 | 7.89M | 602M | Jun 30, 2026 |
| 12 | GEODE CAPITAL MANAGEMENT, LLC | 1214717 | 7.41M | 563.05M | Jun 30, 2026 |
| 13 | MASSACHUSETTS FINANCIAL SERVICES CO /MA/ | 912938 | 6.94M | 533.76M | Jun 30, 2026 |
| 14 | VICTORY CAPITAL MANAGEMENT INC | 1040188 | 6.44M | 491.49M | Jun 30, 2026 |
| 15 | BANK OF AMERICA CORP /DE/ | 70858 | 5.58M | 425.90M | Jun 30, 2026 |
| 16 | FMR LLC | 315066 | 5.04M | 384.79M | Jun 30, 2026 |
| 17 | INVESCO LTD. | 914208 | 4.91M | 374.77M | Jun 30, 2026 |
| 18 | PICTET ASSET MANAGEMENT SA | 1361570 | 4.18M | 219.49M | Jun 30, 2023 |
| 19 | FRANKLIN TEMPLETON INC | 38777 | 3.88M | 296.08M | Jun 30, 2026 |
| 20 | MORGAN STANLEY | 895421 | 3.39M | 258.80M | Jun 30, 2026 |
Data sourced from SEC Form 13F institutional holdings reports. Positions reflect the most recent filing per institution.