ALLIANT ENERGY CORP

Ticker: LNT CUSIP: 018802108 Class: COM

Note: Option positions (PUT/CALL) are excluded.

InstitutionSharesValue ($000)
VANGUARD GROUP INC33,785,294$2,196,382
BlackRock, Inc.24,325,896$1,581,427
STATE STREET CORP16,881,617$1,097,474
JANUS HENDERSON GROUP PLC11,134,938$723,882
VICTORY CAPITAL MANAGEMENT INC8,578,743$557,704
PRICE T ROWE ASSOCIATES INC /MD/8,393,496$546
Nuveen, LLC7,393,170$480,630
MASSACHUSETTS FINANCIAL SERVICES CO /MA/7,173,906$466,376
GEODE CAPITAL MANAGEMENT, LLC7,071,908$458,071
Invesco Ltd.4,723,542$307,077
Pictet Asset Management Holding SA4,067,962$264,458
BANK OF AMERICA CORP /DE/3,742,361$243,291
FRANKLIN RESOURCES INC3,684,906$239,556
COHEN & STEERS, INC.3,614,890$235
MORGAN STANLEY3,084,452$200,520
REAVES W H & CO INC3,057,253$198,752
MAIRS & POWER INC2,956,947$192,231
CHARLES SCHWAB INVESTMENT MANAGEMENT INC2,327,921$151,338
FMR LLC2,312,362$150,327
Legal & General Group Plc2,205,045$143,350
Magellan Asset Management Ltd2,180,425$141,749
NORTHERN TRUST CORP2,144,834$139,436
JOHNSON INVESTMENT COUNSEL INC1,978,399$128,616
DUFF & PHELPS INVESTMENT MANAGEMENT CO1,898,522$123,423
JENNISON ASSOCIATES LLC1,805,214$117,357
Bank of New York Mellon Corp1,526,738$99,253
NEUBERGER BERMAN GROUP LLC1,520,456$98,845
FIRST TRUST ADVISORS LP1,496,083$97,260
JPMORGAN CHASE & CO1,486,355$96,628
DIMENSIONAL FUND ADVISORS LP1,339,172$87,065
Thrivent Financial for Lutherans1,194,883$78
UBS ASSET MANAGEMENT AMERICAS INC1,173,170$76,268
UBS Group AG1,150,399$74,787
ALLIANCEBERNSTEIN L.P.1,098,751$71,430
GOLDMAN SACHS GROUP INC1,094,144$71,130
Point72 Asset Management, L.P.1,090,817$70,914
PRINCIPAL FINANCIAL GROUP INC939,609$61,085
BARCLAYS PLC897,495$58,346
TORONTO DOMINION BANK890,230$57,874
VAUGHAN NELSON INVESTMENT MANAGEMENT, L.P.869,740$56,542
Energy Income Partners, LLC802,252$52,154
LPL Financial LLC794,730$51,665
ANCHOR CAPITAL ADVISORS LLC778,722$50,625
VAUGHAN DAVID INVESTMENTS LLC/IL769,972$50
DZ BANK AG Deutsche Zentral Genossenschafts Bank, Frankfurt769,456$50,022
Swiss National Bank704,200$45,780
ENVESTNET ASSET MANAGEMENT INC697,471$45,343
Artisan Partners Limited Partnership690,975$44,920
DEUTSCHE BANK AG\682,914$44,396
BAHL & GAYNOR INC662,120$43,044
CITADEL ADVISORS LLC652,641$42,428
CALIFORNIA PUBLIC EMPLOYEES RETIREMENT SYSTEM644,212$41,880
MANUFACTURERS LIFE INSURANCE COMPANY, THE630,410$41,042
Carnegie Capital Asset Management, LLC613,708$39,897
Sumitomo Mitsui Trust Holdings, Inc.602,064$39,140
REGIONS FINANCIAL CORP588,456$38,256
ExodusPoint Capital Management, LP577,357$37,534
Amundi575,242$37,396
RHUMBLINE ADVISERS563,919$36,660
COMMONWEALTH OF PENNSYLVANIA PUBLIC SCHOOL EMPLS RETRMT SYS556,037$36,148
Mitsubishi UFJ Kokusai Asset Management Co., Ltd.541,724$35,532
D. E. Shaw & Co., Inc.536,460$34,875
Hudson Bay Capital Management LP531,559$34,557
HITE Hedge Asset Management LLC500,591$32,543
WELLS FARGO & COMPANY/MN481,638$31,311
BNP PARIBAS ARBITRAGE, SA469,689$30,534
ROYAL BANK OF CANADA454,861$29,571
Aventail Capital Group, LP440,362$28,628
Retirement Systems of Alabama438,819$28,528
Russell Investments Group, Ltd.437,740$28,457
CITIGROUP INC432,007$28,085
HSBC HOLDINGS PLC423,366$27,554
RENAISSANCE TECHNOLOGIES LLC421,400$27,395
PUBLIC EMPLOYEES RETIREMENT ASSOCIATION OF COLORADO396,632$26
LIBERTY ONE INVESTMENT MANAGEMENT, LLC384,154$24,974
GODSEY & GIBB, INC369,980$24,052
GABELLI FUNDS LLC352,895$22,942
Gotham Asset Management, LLC352,423$22,911
SCHRODER INVESTMENT MANAGEMENT GROUP340,788$22,155
GATEWAY INVESTMENT ADVISERS LLC316,407$20,570
CALIFORNIA STATE TEACHERS RETIREMENT SYSTEM304,707$19,809
Sourcerock Group LLC299,473$19,469
AMERIPRISE FINANCIAL INC287,036$18,660
RAYMOND JAMES FINANCIAL INC269,635$17,529
NEW YORK STATE TEACHERS RETIREMENT SYSTEM266,287$17
CIBC Private Wealth Group, LLC264,217$17,177
Assenagon Asset Management S.A.255,377$16,602
MARSHALL WACE, LLP253,932$16,508
STATE OF WISCONSIN INVESTMENT BOARD250,692$16,297
STATE BOARD OF ADMINISTRATION OF FLORIDA RETIREMENT SYSTEM249,208$16,201
SEI INVESTMENTS CO245,652$15,970
NATIXIS ADVISORS, L.P.243,413$16
TWO SIGMA INVESTMENTS, LP240,943$15,664
CIBC Asset Management Inc232,310$15,088
T. Rowe Price Investment Management, Inc.230,459$15
OCONNOR, A Distinct Business Unit of UBS ASSET MANAGEMENT AM224,205$14,576
Epoch Investment Partners, Inc.218,470$14,203
BANK OF MONTREAL /CAN/210,918$13,712
NISA INVESTMENT ADVISORS, LLC199,794$12,989
Resolution Capital Ltd198,428$12,900
729 other institutions15,855,252$951,745
Total (829 institutions)231,072,806$13,960,442