ALLIANT ENERGY CORP (LNT) Institutional Shareholders
ALLIANT ENERGY CORP (LNT) is currently reported in institutional portfolios tracked by InsiderSet based on the latest available SEC Form 13F filings for the quarter ended June 30, 2026. The institutional investors covered on this page collectively reported approximately $15.85B in LNT holdings during the latest filing period.
Blackrock, Inc. is currently the largest disclosed institutional shareholder of LNT tracked by InsiderSet, reporting ownership valued at approximately $1.76B in its March 31, 2026 SEC Form 13F filing. Based on current market prices and the latest disclosed share count, the position is now estimated to be worth approximately $1.75B, representing an estimated loss of -0.68% since the filing period.
The top 10 institutional shareholders tracked on this page collectively account for approximately 54% of the total disclosed LNT value among the investors covered in this analysis. Major shareholders include Blackrock, Inc., State Street Corp, Vanguard Capital Management Llc, and several other long-term asset managers with concentrated positions in ALLIANT ENERGY CORP (LNT).
This page ranks the largest institutional LNT shareholders using publicly disclosed SEC Form 13F data, including reported values, estimated current holding values, portfolio allocation percentages, ownership concentration metrics, and historical holding changes across major hedge funds and investment firms.
Institutional Holders
844
Total Reported Value
$15.85B
Largest Holder
Blackrock, Inc.
Largest Position
$1.76B
Insider Transactions (90d)
0
Latest Filing Quarter
Q2 2026
New Institutional Positions
39
Funds Exiting Positions
0
| Name | Investor/Manager | Portfolio % | Quantity | Reported Balance | Current Estimated Value | Gain/loss Since Filing | Estimated Portfolio Performance |
|---|---|---|---|---|---|---|---|
| Blackrock, Inc. | 0.03% | 24,499,440 | $1,758,079,782 | $1,746,075,089 | -$12,004,693 | -0.68% | |
| State Street Corp | 0.04% | 17,010,651 | $1,220,684,316 | $1,212,349,097 | -$8,335,219 | -0.68% | |
| Vanguard Capital Management Llc | 0.03% | 16,699,462 | $1,198,353,393 | $1,190,170,657 | -$8,182,736 | -0.68% | |
| Vanguard Portfolio Management Llc | 0.06% | 14,595,006 | $1,047,337,631 | $1,040,186,078 | -$7,151,553 | -0.68% | |
| Janus Henderson Group Plc | 0.40% | 11,273,621 | $808,995,539 | $803,470,969 | -$5,524,570 | -0.68% | |
| Nuveen, Llc | 0.14% | 7,440,386 | $533,922,064 | $530,276,310 | -$3,645,754 | -0.68% | |
| Massachusetts Financial Services Co | 0.17% | 6,936,512 | $533,760,499 | $494,365,210 | -$39,395,289 | -7.38% | |
| Victory Capital Management Inc | 0.33% | 7,238,864 | $519,460,881 | $515,913,837 | -$3,547,044 | -0.68% | |
| Geode Capital Management, Llc | 0.03% | 7,258,026 | $518,983,541 | $517,279,513 | -$1,704,028 | -0.33% | |
| Bank Of America Corp | 0.03% | 5,344,867 | $383,547,633 | $380,928,671 | -$2,618,962 | -0.68% | |
| Invesco Ltd. | 0.05% | 4,988,448 | $357,971,035 | $355,526,689 | -$2,444,346 | -0.68% | |
| Franklin Resources Inc | 0.07% | 3,896,506 | $279,613,271 | $277,703,983 | -$1,909,288 | -0.68% | |
| Pictet Asset Management Holding Sa | 0.24% | 3,335,106 | $254,435,237 | $237,693,005 | -$16,742,232 | -6.58% | |
| Morgan Stanley | 0.01% | 3,351,175 | $240,480,432 | $238,838,242 | -$1,642,190 | -0.68% | |
| Reaves W H & Co Inc | 3.22% | 2,784,686 | $212,443,695 | $198,464,571 | -$13,979,124 | -6.58% | |
| Mairs & Power Growth Fund | Andrew R. Adams | 2.12% | 2,889,060 | $207,318,946 | $205,903,306 | -$1,415,640 | -0.68% |
| Fmr Llc | 0.01% | 2,862,426 | $205,407,682 | $204,005,101 | -$1,402,581 | -0.68% | |
| Charles Schwab Investment Management Inc | 0.03% | 2,370,447 | $170,103,277 | $168,941,758 | -$1,161,519 | -0.68% | |
| Northern Trust Corp | 0.02% | 2,212,362 | $158,759,097 | $157,675,040 | -$1,084,057 | -0.68% | |
| Legal & General Group Plc | 0.04% | 2,131,870 | $152,983,403 | $151,938,375 | -$1,045,028 | -0.68% | |
| Duff & Phelps Investment Management Co | 1.41% | 1,964,325 | $149,858,354 | $139,997,443 | -$9,860,911 | -6.58% | |
| Magellan Asset Management Ltd | 1.89% | 2,034,446 | $145,991,845 | $144,994,966 | -$996,879 | -0.68% | |
| Jennison Associates Llc | 0.08% | 1,713,259 | $130,704,529 | $122,103,969 | -$8,600,560 | -6.58% | |
| Goldman Sachs Group Inc | 0.01% | 1,538,245 | $110,384,456 | $109,630,721 | -$753,735 | -0.68% | |
| Johnson Investment Counsel Inc | 0.80% | 1,435,378 | $109,504,960 | $102,299,390 | -$7,205,570 | -6.58% | |
| Bank Of New York Mellon Corp | 0.02% | 1,509,506 | $108,322,095 | $107,582,493 | -$739,602 | -0.68% | |
| Vanguard Fiduciary Trust Co | 0.03% | 1,448,098 | $103,915,512 | $103,205,944 | -$709,568 | -0.68% | |
| Dimensional Fund Advisors Lp | 0.02% | 1,383,646 | $99,287,352 | $98,612,450 | -$674,902 | -0.68% | |
| Neuberger Berman Group Llc | 0.07% | 1,323,587 | $95,109,650 | $94,332,045 | -$777,605 | -0.82% | |
| Deutsche Bank Ag\ | 0.03% | 1,273,887 | $91,414,132 | $90,789,926 | -$624,206 | -0.68% | |
| Point72 Asset Management, L.P. | 0.16% | 1,243,581 | $89,239,373 | $88,630,018 | -$609,355 | -0.68% | |
| Ubs Am, A Distinct Business Unit Of Ubs Asset Management Americas Llc | 0.02% | 1,186,759 | $85,161,826 | $84,580,314 | -$581,512 | -0.68% | |
| Vaughan Nelson Investment Management, L.P. | 0.74% | 1,099,030 | $83,844,998 | $78,327,868 | -$5,517,130 | -6.58% | |
| First Trust Advisors Lp | 0.06% | 1,133,023 | $81,305,732 | $80,750,549 | -$555,183 | -0.68% | |
| Squarepoint Ops Llc | 0.17% | 1,132,902 | $81,297,048 | $80,741,926 | -$555,122 | -0.68% | |
| Ubs Group Ag | 0.01% | 1,099,341 | $78,888,710 | $78,350,033 | -$538,677 | -0.68% | |
| Envestnet Asset Management Inc | 0.02% | 936,127 | $71,417,092 | $66,717,771 | -$4,699,321 | -6.58% | |
| Alliancebernstein L.P. | 0.02% | 1,070,282 | $69,579,033 | $76,278,998 | +$6,699,965 | +9.63% | |
| Citigroup Inc | 0.03% | 901,063 | $68,742,096 | $64,218,760 | -$4,523,336 | -6.58% | |
| Barclays Plc | 0.02% | 947,133 | $67,966,266 | $67,502,169 | -$464,097 | -0.68% | |
| Principal Financial Group Inc | 0.03% | 897,535 | $64,408,843 | $63,967,319 | -$441,524 | -0.69% | |
| Toronto Dominion Bank | 0.12% | 851,747 | $61,121,365 | $60,704,009 | -$417,356 | -0.68% | |
| Marshall Wace, Llp | 0.06% | 845,825 | $60,696,404 | $60,281,948 | -$414,456 | -0.68% | |
| Energy Income Partners, Llc | 0.93% | 809,556 | $58,093,739 | $57,697,056 | -$396,683 | -0.68% | |
| Lpl Financial Llc | 0.02% | 792,471 | $56,867,704 | $56,479,408 | -$388,296 | -0.68% | |
| Bahl & Gaynor Inc | 0.28% | 775,746 | $55,667,533 | $55,287,417 | -$380,116 | -0.68% | |
| Anchor Capital Advisors Llc | 1.58% | 771,400 | $55,355,671 | $54,977,678 | -$377,993 | -0.68% | |
| Swiss National Bank | 0.03% | 754,300 | $54,128,568 | $53,758,961 | -$369,607 | -0.68% | |
| Renaissance Technologies LLC | Jim Simons | 0.08% | 710,700 | $50,999,832 | $50,651,589 | -$348,243 | -0.68% |
| Dz Bank Ag Deutsche Zentral Genossenschafts Bank, Frankfurt Am Main | 0.05% | 706,958 | $50,731,306 | $50,384,897 | -$346,409 | -0.68% |
Frequently asked questions about LNT
Who owns the most LNT stock?
The largest holders of LNT are typically major institutional investors such as asset managers and hedge funds reporting on Form 13F. The table above ranks tracked superinvestors by reported position size using the latest available filings for ALLIANT ENERGY CORP (LNT).
Is LNT widely held by superinvestors?
Many widely followed stocks like LNT appear across numerous superinvestor portfolios because of liquidity, index inclusion, and fundamentals. The holder count and table above show how broadly LNT is represented among the institutional managers we track.
What do “Current Estimated Value”, “Gain/loss Since Filing”, and “Estimated Portfolio Performance” mean?
Current Estimated Value is reported share quantity from the latest 13F times our most recent split-adjusted U.S. session close. Gain/loss Since Filing is that estimate minus the reported 13F dollar value; Estimated Portfolio Performance is that difference as a percent of the reported value. Green means the estimate is above the filing value; red means below (not purchase cost). If many filers share the same implied filing price per share, the performance % may match across rows. These are not official fund marks or live quotes.