ALLIANT ENERGY CORP

Ticker: LNT CUSIP: 018802108 Class: COM

RHUMBLINE ADVISERS's Holding History (CIK: 0001115418)

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

Q4 2025

Shares 563,919 Value ($000) $36,660 Avg Close $66.83 Range $64.30 - $69.59

Q3 2025

Shares 582,776 Value ($000) $39,285 Avg Close $63.88 Range $59.07 - $67.04

Q2 2025

Shares 558,788 Value ($000) $33,790 Avg Close $60.10 Range $55.76 - $64.19

Q1 2025

Shares 546,110 Value ($000) $35,142 Avg Close $59.57 Range $54.52 - $64.99

Q4 2024

Shares 526,788 Value ($000) $31,154 Avg Close $58.37 Range $54.30 - $62.16

Q3 2024

Shares 533,116 Value ($000) $32,355 Avg Close $54.38 Range $48.12 - $58.63

Q2 2024

Shares 540,485 Value ($000) $27,511 Avg Close $47.71 Range $44.54 - $49.81

Q1 2024

Shares 505,744 Value ($000) $25,489 Avg Close $46.11 Range $44.14 - $48.90

Q4 2023

Shares 503,316 Value ($000) $25,820 Avg Close $46.45 Range $41.77 - $50.29

Q3 2023

Shares 467,600 Value ($000) $22,655 Avg Close $47.84 Range $44.23 - $51.62

Q2 2023

Shares 550,021 Value ($000) $28,865 Avg Close $49.05 Range $46.13 - $51.23

Q1 2023

Shares 563,861 Value ($000) $30 Avg Close $48.28 Range $45.19 - $50.77

Q4 2022

Shares 528,055 Value ($000) $29 Avg Close $48.07 Range $42.22 - $51.90

Q3 2022

Shares 517,378 Value ($000) $27,416 Avg Close $53.87 Range $47.25 - $57.82

Q2 2022

Shares 492,257 Value ($000) $28,851 Avg Close $53.50 Range $48.14 - $57.66

Q1 2022

Shares 437,722 Value ($000) $27,349 Avg Close $52.37 Range $48.33 - $55.78

Q4 2021

Shares 414,144 Value ($000) $25,457 Avg Close $50.05 Range $47.35 - $54.07

Q3 2021

Shares 405,393 Value ($000) $22,694 Avg Close $51.28 Range $47.64 - $54.21

Q2 2021

Shares 411,613 Value ($000) $22,952 Avg Close $48.83 Range $45.94 - $51.03

Q1 2021

Shares 450,577 Value ($000) $24,403 Avg Close $42.55 Range $39.42 - $47.06

Q4 2020

Shares 450,036 Value ($000) $23,190 Avg Close $45.61 Range $40.48 - $49.39

Q3 2020

Shares 473,936 Value ($000) $24,479 Avg Close $44.02 Range $39.84 - $46.94

Q2 2020

Shares 456,864 Value ($000) $21,856 Avg Close $40.72 Range $36.29 - $45.31

Q1 2020

Shares 510,190 Value ($000) $24,637 Avg Close $45.48 Range $31.34 - $50.16

Q4 2019

Shares 453,623 Value ($000) $24,822 Avg Close $43.82 Range $42.11 - $45.80

Q3 2019

Shares 424,370 Value ($000) $22,886 Avg Close $42.08 Range $39.53 - $44.83

Q2 2019

Shares 415,267 Value ($000) $20,381 Avg Close $38.79 Range $37.00 - $40.91

Q1 2019

Shares 423,515 Value ($000) $19,960 Avg Close $36.14 Range $32.70 - $38.77

Q4 2018

Shares 467,470 Value ($000) $19,751 Avg Close $35.19 Range $32.65 - $37.38

Q3 2018

Shares 473,822 Value ($000) $20,171 Avg Close $34.13 Range $32.72 - $35.18

Q2 2018

Shares 466,053 Value ($000) $19,723 Avg Close $32.46 Range $30.20 - $34.35

Q1 2018

Shares 482,992 Value ($000) $19,735 Avg Close $30.84 Range $28.88 - $33.21

Q4 2017

Shares 467,152 Value ($000) $19,905 Avg Close $33.80 Range $31.68 - $35.41

Q3 2017

Shares 448,719 Value ($000) $18,653 Avg Close $32.04 Range $30.14 - $33.72

Q2 2017

Shares 433,902 Value ($000) $17,430 Avg Close $30.93 Range $29.83 - $32.31

Q1 2017

Shares 426,874 Value ($000) $16,908 Avg Close $29.08 Range $27.58 - $30.63

Q4 2016

Shares 436,045 Value ($000) $16,522 Avg Close $27.74 Range $26.27 - $29.13

Q3 2016

Shares 378,261 Value ($000) $14,491 Avg Close $29.26 Range $27.72 - $30.41

Q2 2016

Shares 179,933 Value ($000) $7,143 Avg Close $27.46 Range $25.25 - $29.85

Q1 2016

Shares 185,104 Value ($000) $13,750 Avg Close $24.74 Range $22.13 - $27.34

Q4 2015

Shares 179,204 Value ($000) $11,191 Avg Close $21.84 Range $20.45 - $23.41

Q3 2015

Shares 177,599 Value ($000) $10,388 Avg Close $21.20 Range $19.59 - $22.72

Q2 2015

Shares 169,411 Value ($000) $9,778 Avg Close $21.63 Range $20.41 - $22.74

Q1 2015

Shares 152,915 Value ($000) $9,634 Avg Close $23.04 Range $21.25 - $25.01

Q4 2014

Shares 137,625 Value ($000) $9,141 Avg Close $21.73 Range $19.32 - $24.55

Q3 2014

Shares 134,830 Value ($000) $7,471 Avg Close $20.07 Range $19.08 - $21.06

Q2 2014

Shares 134,080 Value ($000) $8,160 Avg Close $19.98 Range $19.02 - $21.06

Q1 2014

Shares 154,648 Value ($000) $8,786 Avg Close $18.07 Range $16.97 - $19.54

Q4 2013

Shares 156,388 Value ($000) $8,070 Avg Close $17.48 Range $16.43 - $18.23

Q3 2013

Shares 167,133 Value ($000) $8,281 Avg Close $17.15 Range $16.21 - $18.15

Q2 2013

Shares 168,087 Value ($000) $8,475 Avg Close $16.89 Range $15.60 - $17.85

Period	Shares	Value ($000)	Average Close	Price Range
Q4 2025	563,919	$36,660	$66.83	$64.30 - $69.59
Q3 2025	582,776	$39,285	$63.88	$59.07 - $67.04
Q2 2025	558,788	$33,790	$60.10	$55.76 - $64.19
Q1 2025	546,110	$35,142	$59.57	$54.52 - $64.99
Q4 2024	526,788	$31,154	$58.37	$54.30 - $62.16
Q3 2024	533,116	$32,355	$54.38	$48.12 - $58.63
Q2 2024	540,485	$27,511	$47.71	$44.54 - $49.81
Q1 2024	505,744	$25,489	$46.11	$44.14 - $48.90
Q4 2023	503,316	$25,820	$46.45	$41.77 - $50.29
Q3 2023	467,600	$22,655	$47.84	$44.23 - $51.62
Q2 2023	550,021	$28,865	$49.05	$46.13 - $51.23
Q1 2023	563,861	$30	$48.28	$45.19 - $50.77
Q4 2022	528,055	$29	$48.07	$42.22 - $51.90
Q3 2022	517,378	$27,416	$53.87	$47.25 - $57.82
Q2 2022	492,257	$28,851	$53.50	$48.14 - $57.66
Q1 2022	437,722	$27,349	$52.37	$48.33 - $55.78
Q4 2021	414,144	$25,457	$50.05	$47.35 - $54.07
Q3 2021	405,393	$22,694	$51.28	$47.64 - $54.21
Q2 2021	411,613	$22,952	$48.83	$45.94 - $51.03
Q1 2021	450,577	$24,403	$42.55	$39.42 - $47.06
Q4 2020	450,036	$23,190	$45.61	$40.48 - $49.39
Q3 2020	473,936	$24,479	$44.02	$39.84 - $46.94
Q2 2020	456,864	$21,856	$40.72	$36.29 - $45.31
Q1 2020	510,190	$24,637	$45.48	$31.34 - $50.16
Q4 2019	453,623	$24,822	$43.82	$42.11 - $45.80
Q3 2019	424,370	$22,886	$42.08	$39.53 - $44.83
Q2 2019	415,267	$20,381	$38.79	$37.00 - $40.91
Q1 2019	423,515	$19,960	$36.14	$32.70 - $38.77
Q4 2018	467,470	$19,751	$35.19	$32.65 - $37.38
Q3 2018	473,822	$20,171	$34.13	$32.72 - $35.18
Q2 2018	466,053	$19,723	$32.46	$30.20 - $34.35
Q1 2018	482,992	$19,735	$30.84	$28.88 - $33.21
Q4 2017	467,152	$19,905	$33.80	$31.68 - $35.41
Q3 2017	448,719	$18,653	$32.04	$30.14 - $33.72
Q2 2017	433,902	$17,430	$30.93	$29.83 - $32.31
Q1 2017	426,874	$16,908	$29.08	$27.58 - $30.63
Q4 2016	436,045	$16,522	$27.74	$26.27 - $29.13
Q3 2016	378,261	$14,491	$29.26	$27.72 - $30.41
Q2 2016	179,933	$7,143	$27.46	$25.25 - $29.85
Q1 2016	185,104	$13,750	$24.74	$22.13 - $27.34
Q4 2015	179,204	$11,191	$21.84	$20.45 - $23.41
Q3 2015	177,599	$10,388	$21.20	$19.59 - $22.72
Q2 2015	169,411	$9,778	$21.63	$20.41 - $22.74
Q1 2015	152,915	$9,634	$23.04	$21.25 - $25.01
Q4 2014	137,625	$9,141	$21.73	$19.32 - $24.55
Q3 2014	134,830	$7,471	$20.07	$19.08 - $21.06
Q2 2014	134,080	$8,160	$19.98	$19.02 - $21.06
Q1 2014	154,648	$8,786	$18.07	$16.97 - $19.54
Q4 2013	156,388	$8,070	$17.48	$16.43 - $18.23
Q3 2013	167,133	$8,281	$17.15	$16.21 - $18.15
Q2 2013	168,087	$8,475	$16.89	$15.60 - $17.85