ALLIANT ENERGY CORP LNT
COM · Common Stock · CUSIP 018802108 · ISIN US0188021085
Public utility holding company based in Madison,WI, US
- SectorUtilities
- IndustryElectric & Other Services Combined
- HeadquartersMadison, WI
- Founded1981
- Websitealliantenergy.com
- FilingsSEC EDGAR
* Summed across managers. Shares that two managers' reports both contain – a subsidiary's holdings that its parent's report includes too, or a sub-adviser's in its client's – are counted once ($59.3m this quarter). Holder counts are more reliable. Shares outstanding: 256.7m as of 2025-01-31, from the company's own SEC filing; the percentage can still exceed 100%: lent-out shares are counted by the lender and the buyer, and some reports overlap without saying so. Implied quarter-end price ≈ $59.13. Options: 7 managers hold calls ($3.5m notional), 4 hold puts ($3.0m).
Trends to Q4 2024
Institutional holders
Managers reporting a position, each quarter
Numbers
| Quarter | Holders |
|---|---|
| Q3 2022 | 627 |
| Q4 2022 | 661 |
| Q1 2023 | 637 |
| Q2 2023 | 635 |
| Q3 2023 | 615 |
| Q4 2023 | 653 |
| Q1 2024 | 630 |
| Q2 2024 | 659 |
| Q3 2024 | 680 |
| Q4 2024 | 718 |
Buyers vs sellers
Managers adding to or starting a position, vs cutting or selling out
Numbers
| Quarter | Bought or added | Cut or sold out |
|---|---|---|
| Q1 2023 | 309 | 263 |
| Q2 2023 | 270 | 270 |
| Q3 2023 | 272 | 289 |
| Q4 2023 | 287 | 280 |
| Q1 2024 | 298 | 315 |
| Q2 2024 | 310 | 267 |
| Q3 2024 | 337 | 272 |
| Q4 2024 | 331 | 270 |
Calls vs puts
Options held, notional value, last 4 quarters. P/C = puts ÷ calls
Numbers
| Quarter | Calls | Puts | P/C |
|---|---|---|---|
| Q1 2024 | $5.0m | $11.1m | 2.22 |
| Q2 2024 | $5.6m | $6.4m | 1.13 |
| Q3 2024 | $10.7m | $6.3m | 0.59 |
| Q4 2024 | $3.5m | $3.0m | 0.84 |
Biggest buyers
| T. Rowe Price Investment Management, Inc. | Added | +4.1m |
| BlackRock, Inc. | Added | +1.5m |
| NEUBERGER BERMAN GROUP LLC | Added | +932.5k |
| UBS Group AG | Added | +687.3k |
| UBS AM, a distinct business unit of UBS ASSET MANAGEMENT AMERICAS LLC | Added | +623.4k |
| JENNISON ASSOCIATES LLC | New | +544.9k |
| Invesco Ltd. | Added | +532.0k |
| BI Asset Management Fondsmaeglerselskab A/S | New | +527.6k |
| MASSACHUSETTS FINANCIAL SERVICES CO /MA/ | Added | +499.8k |
| Balyasny Asset Management L.P. | New | +412.5k |
Biggest sellers
| Mitsubishi UFJ Trust & Banking Corp | Reduced | -1.8m |
| JPMORGAN CHASE & CO | Reduced | -1.3m |
| Point72 Asset Management, L.P. | Reduced | -1.1m |
| REAVES W H & CO INC | Reduced | -728.1k |
| CITADEL ADVISORS LLC | Reduced | -684.4k |
| Magellan Asset Management Ltd | Reduced | -605.2k |
| Energy Income Partners, LLC | Reduced | -359.5k |
| WESTWOOD HOLDINGS GROUP INC | Reduced | -313.0k |
| FMR LLC | Reduced | -309.5k |
| Covalis Capital LLP | Sold out | -290.3k |
Biggest calls
| CITADEL ADVISORS LLC | Reduced | $2.0m33.1k shares |
| Walleye Trading LLC | Added | $887.1k15.0k shares |
| SUSQUEHANNA INTERNATIONAL GROUP, LLP | Reduced | $443.6k7.5k shares |
| SIMPLEX TRADING, LLC | Reduced | $159.0k2.7k shares |
| CAPSTONE INVESTMENT ADVISORS, LLC | Added | $88.7k1.5k shares |
| GROUP ONE TRADING LLC | Reduced | $11.8k200 shares |
| CONCOURSE FINANCIAL GROUP SECURITIES, INC. | Unchanged | $00 shares |
Biggest puts
| CITADEL ADVISORS LLC | Reduced | $2.1m35.5k shares |
| SIMPLEX TRADING, LLC | Reduced | $449.0k7.6k shares |
| CAPSTONE INVESTMENT ADVISORS, LLC | Added | $437.6k7.4k shares |
| CONCOURSE FINANCIAL GROUP SECURITIES, INC. | Unchanged | $00 shares |
Options at notional value: the value of the shares the contracts control, as filers report them, not what the options cost. Not included in the holders, shares or buying above.
Major shareholders (over 5%)
Anyone who owns more than 5% of a class of the company's shares has to say so: on Schedule 13D if they may try to influence or control the company, on 13G if they're a passive investor, and update it as the stake changes. Each holder's latest filing, from 19 Dec 2024 on; percentages are of the share class, as the holder worked them out.
| Holder | Stake |
|---|---|
| VANGUARD CAPITAL MANAGEMENT LLC 13G · institution new · filed 2026-04-29 | 7.5% |
| VANGUARD PORTFOLIO MANAGEMENT LLC 13G · institution new · filed 2026-04-28 | 5.7% |
Fell to 5% or below in the last year: VANGUARD GROUP INC (0.0%, 2026-03-26; now reported by VANGUARD CAPITAL MANAGEMENT LLC)
Insider purchases and sales in Q4 2024
Shares bought or sold by the company's own officers, directors and 10% owners, in the open market or privately, as they reported to the SEC on Form 4 (due within two business days of the trade). Grants, option exercises, shares withheld for tax and gifts aren't included.
Officers and directors buying vs selling
Number of people, by quarter (10% owners not included)
Numbers
| Quarter | Buying | Bought | Selling | Sold | Sold under a plan |
|---|---|---|---|---|---|
| Q1 2023 | 0 | — | 0 | — | — |
| Q2 2023 | 0 | — | 0 | — | — |
| Q3 2023 | 0 | — | 0 | — | — |
| Q4 2023 | 0 | — | 0 | — | — |
| Q1 2024 | 2 | $77.5k | 0 | — | — |
| Q2 2024 | 0 | — | 0 | — | — |
| Q3 2024 | 0 | — | 0 | — | — |
| Q4 2024 | 0 | — | 0 | — | — |
None reported in Q4 2024.
Holders, Q4 2024
| Manager | Shares | Change |
|---|---|---|
| VANGUARD GROUP INC 0.03% of their portfolio | 32.7m $1.9bn | Added +226.3k |
| BlackRock, Inc. 0.03% of their portfolio | 24.6m $1.5bn | Added +1.5m |
| STATE STREET CORP 0.04% of their portfolio | 16.4m $968.2m | Added +130.0k |
| VICTORY CAPITAL MANAGEMENT INC 0.63% of their portfolio | 10.8m $639.1m | Reduced -184.2k |
| JANUS HENDERSON GROUP PLC 0.32% of their portfolio | 10.8m $636.8m | Added +77.0k |
| Nuveen Asset Management, LLC 0.13% of their portfolio | 8.1m $477.4m | Reduced -176.0k |
| MASSACHUSETTS FINANCIAL SERVICES CO /MA/ 0.13% of their portfolio | 7.0m $414.7m | Added +499.8k |
| GEODE CAPITAL MANAGEMENT, LLC 0.03% of their portfolio | 6.7m $395.0m | Added +102.6k |
| Invesco Ltd. 0.05% of their portfolio | 4.9m $288.1m | Added +532.0k |
| T. Rowe Price Investment Management, Inc. 0.15% of their portfolio | 4.2m $247.6m | Added +4.1m |
| Pictet Asset Management Holding SA 0.26% of their portfolio | 4.1m $241.1m | Added +72.7k |
| MAIRS & POWER INC 2.24% of their portfolio | 3.9m $231.5m | Reduced -181.3k |
| FRANKLIN RESOURCES INC 0.06% of their portfolio | 3.7m $216.9m | Reduced -7.6k |
| BANK OF AMERICA CORP /DE/ 0.02% of their portfolio | 3.2m $189.8m | Added +383.5k |
| MORGAN STANLEY 0.01% of their portfolio | 2.8m $166.1m | Added +54.5k |
| NORTHERN TRUST CORP 0.02% of their portfolio | 2.4m $142.7m | Added +177.1k |
| Thrivent Financial for Lutherans 0.27% of their portfolio | 2.3m $137.6m | Reduced -27.8k |
| COHEN & STEERS, INC. 0.26% of their portfolio | 2.3m $136.4m | Added +1.1k |
| CHARLES SCHWAB INVESTMENT MANAGEMENT INC 0.02% of their portfolio | 2.3m $133.2m | Added +36.4k |
| Legal & General Group Plc 0.03% of their portfolio | 2.1m $125.0m | Reduced -54.9k |
| DUFF & PHELPS INVESTMENT MANAGEMENT CO 1.46% of their portfolio | 2.1m $121.6m | Added +169.0k |
| Bank of New York Mellon Corp 0.02% of their portfolio | 2.1m $121.6m | Added +16.9k |
| JOHNSON INVESTMENT COUNSEL INC 1.05% of their portfolio | 1.8m $107.4m | Added +9.3k |
| NEUBERGER BERMAN GROUP LLC 0.08% of their portfolio | 1.7m $100.1m | Added +932.5k |
| UBS AM, a distinct business unit of UBS ASSET MANAGEMENT AMERICAS LLC 0.02% of their portfolio | 1.6m $95.1m | Added +623.4k |
| UBS Group AG 0.02% of their portfolio | 1.4m $82.8m | Added +687.3k |
| FIRST TRUST ADVISORS LP 0.07% of their portfolio | 1.4m $81.1m | Added +75.0k |
| DIMENSIONAL FUND ADVISORS LP 0.02% of their portfolio | 1.4m $79.9m | Reduced -7.2k |
| CITADEL ADVISORS LLC 0.07% of their portfolio | 1.2m $73.2m | Reduced -684.4k |
| California Public Employees Retirement System 0.05% of their portfolio | 1.2m $69.5m | Added +7.5k |
| PRINCIPAL FINANCIAL GROUP INC 0.04% of their portfolio | 1.2m $69.1m | Reduced -14.8k |
| Magellan Asset Management Ltd 0.71% of their portfolio | 1.1m $64.4m | Reduced -605.2k |
| Artisan Partners Limited Partnership 0.09% of their portfolio | 1.0m $59.3m | Added +516 |
| BARCLAYS PLC 0.03% of their portfolio | 968.8k $57.3m | Added +359.9k |
| ANCHOR CAPITAL ADVISORS LLC 1.47% of their portfolio | 869.2k $51.4m | Reduced -59.8k |
| DEUTSCHE BANK AG\ 0.02% of their portfolio | 809.2k $47.9m | Added +195.8k |
| REAVES W H & CO INC 1.23% of their portfolio | 786.9k $46.5m | Reduced -728.1k |
| VAUGHAN DAVID INVESTMENTS LLC/IL 1.07% of their portfolio | 763.3k $45.1m | Added +5.0k |
| Energy Income Partners, LLC 0.90% of their portfolio | 739.3k $43.7m | Reduced -359.5k |
| Swiss National Bank 0.03% of their portfolio | 724.7k $42.9m | Reduced -34.4k |
| ENVESTNET ASSET MANAGEMENT INC 0.01% of their portfolio | 660.9k $39.1m | Added +11.5k |
| BNP PARIBAS FINANCIAL MARKETS 0.03% of their portfolio | 628.6k $37.2m | Added +206.2k |
| REGIONS FINANCIAL CORP 0.27% of their portfolio | 627.8k $37.1m | Reduced -10.2k |
| Sumitomo Mitsui Trust Group, Inc. 0.02% of their portfolio | 615.5k $36.4m | Added +26.7k |
| Verition Fund Management LLC 0.17% of their portfolio | 558.8k $33.0m | Added +325.1k |
| GOLDMAN SACHS GROUP INC 0.01% of their portfolio | 546.0k $32.3m | Reduced -133.0k |
| JENNISON ASSOCIATES LLC 0.02% of their portfolio | 544.9k $32.2m | New |
| LIBERTY ONE INVESTMENT MANAGEMENT, LLC 3.45% of their portfolio | 538.6k $31.9m | Reduced -1.6k |
| ALLIANCEBERNSTEIN L.P. 0.01% of their portfolio | 537.0k $31.8m | Added +327 |
| Eagle Ridge Investment Management 2.74% of their portfolio | 531.1k $31.4m | Reduced -5.3k |
| BI Asset Management Fondsmaeglerselskab A/S 0.33% of their portfolio | 527.6k $31.2m | New |
| RHUMBLINE ADVISERS 0.03% of their portfolio | 526.8k $31.2m | Reduced -6.3k |
| Point72 Asset Management, L.P. 0.08% of their portfolio | 504.5k $29.8m | Reduced -1.1m |
| WELLS FARGO & COMPANY/MN 0.01% of their portfolio | 489.2k $28.9m | Reduced -94.5k |
| COMMONWEALTH OF PENNSYLVANIA PUBLIC SCHOOL EMPLS RETRMT SYS 0.18% of their portfolio | 485.5k $28.7m | Reduced -1.9k |
| ROYAL BANK OF CANADA 0.01% of their portfolio | 484.4k $28.6m | Added +33.5k |
| LPL Financial LLC 0.01% of their portfolio | 483.8k $28.6m | Added +21.9k |
| MANUFACTURERS LIFE INSURANCE COMPANY, THE 0.02% of their portfolio | 474.9k $28.1m | Reduced -23.7k |
| Retirement Systems of Alabama 0.10% of their portfolio | 450.8k $26.7m | Reduced -654 |
| HSBC HOLDINGS PLC 0.02% of their portfolio | 448.5k $26.5m | Added +83.5k |
| Mitsubishi UFJ Asset Management Co., Ltd. 0.02% of their portfolio | 427.8k $25.0m | Added +28.9k |
| Balyasny Asset Management L.P. 0.06% of their portfolio | 412.5k $24.4m | New |
| JPMORGAN CHASE & CO 0.00% of their portfolio | 406.5k $24.0m | Reduced -1.3m |
| Bahl & Gaynor LLC 0.13% of their portfolio | 402.8k $23.8m | Added +48.6k |
| WELLINGTON MANAGEMENT GROUP LLP 0.00% of their portfolio | 390.9k $23.1m | Reduced -100.4k |
| National Pension Service 0.02% of their portfolio | 381.0k $22.5m | New |
| GODSEY & GIBB, INC 2.19% of their portfolio | 370.3k $21.9m | Reduced -966 |
| FMR LLC 0.00% of their portfolio | 362.1k $21.4m | Reduced -309.5k |
| PRICE T ROWE ASSOCIATES INC /MD/ 0.00% of their portfolio | 360.3k $21.3m | Added +3.6k |
| SCHRODER INVESTMENT MANAGEMENT GROUP 0.02% of their portfolio | 357.9k $21.2m | Reduced -21.4k |
| GABELLI FUNDS LLC 0.16% of their portfolio | 355.2k $21.0m | Added +850 |
| RAYMOND JAMES FINANCIAL INC 0.01% of their portfolio | 349.6k $20.7m | First filing |
| Hudson Bay Capital Management LP 0.12% of their portfolio | 335.7k $19.9m | New |
| BANK OF MONTREAL /CAN/ 0.01% of their portfolio | 322.7k $19.1m | Reduced -9.6k |
| CALIFORNIA STATE TEACHERS RETIREMENT SYSTEM 0.02% of their portfolio | 304.7k $18.0m | Reduced -13.9k |
| GATEWAY INVESTMENT ADVISERS LLC 0.19% of their portfolio | 294.0k $17.4m | Reduced -1.8k |
| SEI INVESTMENTS CO 0.02% of their portfolio | 275.7k $16.3m | Reduced -99.5k |
| WESTWOOD HOLDINGS GROUP INC 0.13% of their portfolio | 275.0k $16.3m | Reduced -313.0k |
| STATE BOARD OF ADMINISTRATION OF FLORIDA RETIREMENT SYSTEM 0.03% of their portfolio | 273.6k $16.2m | Reduced -16.6k |
| NEW YORK STATE TEACHERS RETIREMENT SYSTEM 0.03% of their portfolio | 273.6k $16.2m | Reduced -6.2k |
| AMERIPRISE FINANCIAL INC 0.00% of their portfolio | 261.0k $15.4m | Added +2.1k |
| Epoch Investment Partners, Inc. 0.07% of their portfolio | 253.8k $15.0m | Reduced -20.4k |
| Russell Investments Group, Ltd. 0.02% of their portfolio | 249.1k $14.7m | Reduced -236.8k |
| ADAGE CAPITAL PARTNERS GP, L.L.C. 0.02% of their portfolio | 239.7k $14.2m | New |
| AE Wealth Management LLC 0.11% of their portfolio | 227.0k $13.4m | Added +8.0k |
| Amundi 0.00% of their portfolio | 214.9k $12.5m | Added +29.7k |
| NATIONAL BANK OF CANADA /FI/ 0.02% of their portfolio | 213.4k $12.6m | Added +11.4k |
| Mitsubishi UFJ Trust & Banking Corp 0.03% of their portfolio | 210.8k $12.5m | Reduced -1.8m |
| Greenland Capital Management LP 2.37% of their portfolio | 200.8k $11.9m | Reduced -47.9k |
| NATIXIS ADVISORS, LLC 0.02% of their portfolio | 200.6k $11.9m | Added +4.3k |
| NISA INVESTMENT ADVISORS, LLC 0.05% of their portfolio | 200.5k $11.9m | Reduced -2.6k |
| MACQUARIE GROUP LTD 0.01% of their portfolio | 193.4k $10.9m | Added +882 |
| STATE OF WISCONSIN INVESTMENT BOARD 0.03% of their portfolio | 191.8k $11.3m | Added +19.7k |
| Korea Investment CORP 0.03% of their portfolio | 190.9k $11.3m | Added +73.1k |
| CITIGROUP INC 0.01% of their portfolio | 179.9k $10.6m | Reduced -130.1k |
| Allspring Global Investments Holdings, LLC 0.02% of their portfolio | 173.0k $10.1m | Reduced -14.5k |
| Dorsey & Whitney Trust CO LLC 0.55% of their portfolio | 167.7k $9.9m | Added +2.6k |
| CIBC Private Wealth Group LLC 0.02% of their portfolio | 165.0k $9.6m | Reduced -866 |
| Asset Management One Co., Ltd. 0.03% of their portfolio | 160.8k $9.6m | Added +1.3k |
| DRW Securities, LLC 0.62% of their portfolio | 155.2k $9.2m | Added +143.0k |