ALLIANT ENERGY CORP

Ticker: LNT CUSIP: 018802108 Class: COM

EVERETT HARRIS & CO /CA/'s Holding History (CIK: 0001009254)

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

Q4 2025

Shares 16,272 Value ($000) $1,058 Avg Close $66.83 Range $64.30 - $69.59

Q3 2025

Shares 16,272 Value ($000) $1,097 Avg Close $63.88 Range $59.07 - $67.04

Q2 2025

Shares 16,672 Value ($000) $1,008 Avg Close $60.10 Range $55.76 - $64.19

Q1 2025

Shares 17,502 Value ($000) $1,126 Avg Close $59.57 Range $54.52 - $64.99

Q4 2024

Shares 19,202 Value ($000) $1,136 Avg Close $58.37 Range $54.30 - $62.16

Q3 2024

Shares 20,602 Value ($000) $1,250 Avg Close $54.38 Range $48.12 - $58.63

Q2 2024

Shares 20,746 Value ($000) $1,056 Avg Close $47.71 Range $44.54 - $49.81

Q1 2024

Shares 21,346 Value ($000) $1,076 Avg Close $46.11 Range $44.14 - $48.90

Q4 2023

Shares 23,646 Value ($000) $1,213 Avg Close $46.45 Range $41.77 - $50.29

Q3 2023

Shares 31,246 Value ($000) $1,514 Avg Close $47.84 Range $44.23 - $51.62

Q2 2023

Shares 31,496 Value ($000) $1,653 Avg Close $49.05 Range $46.13 - $51.23

Q1 2023

Shares 31,996 Value ($000) $1,709 Avg Close $48.28 Range $45.19 - $50.77

Q4 2022

Shares 33,096 Value ($000) $1,827 Avg Close $48.07 Range $42.22 - $51.90

Q3 2022

Shares 33,096 Value ($000) $1,754 Avg Close $53.87 Range $47.25 - $57.82

Q2 2022

Shares 33,496 Value ($000) $1,963 Avg Close $53.50 Range $48.14 - $57.66

Q1 2022

Shares 33,496 Value ($000) $2,093 Avg Close $52.37 Range $48.33 - $55.78

Q4 2021

Shares 33,646 Value ($000) $2,068 Avg Close $50.05 Range $47.35 - $54.07

Q3 2021

Shares 33,696 Value ($000) $1,886 Avg Close $51.28 Range $47.64 - $54.21

Q2 2021

Shares 34,290 Value ($000) $1,912 Avg Close $48.83 Range $45.94 - $51.03

Q1 2021

Shares 35,090 Value ($000) $1,900 Avg Close $42.55 Range $39.42 - $47.06

Q4 2020

Shares 42,090 Value ($000) $2,169 Avg Close $45.61 Range $40.48 - $49.39

Q3 2020

Shares 43,140 Value ($000) $2,228 Avg Close $44.02 Range $39.84 - $46.94

Q2 2020

Shares 44,240 Value ($000) $2,116 Avg Close $40.72 Range $36.29 - $45.31

Q1 2020

Shares 45,081 Value ($000) $2,177 Avg Close $45.48 Range $31.34 - $50.16

Q4 2019

Shares 45,079 Value ($000) $2,467 Avg Close $43.82 Range $42.11 - $45.80

Q3 2019

Shares 45,527 Value ($000) $2,455 Avg Close $42.08 Range $39.53 - $44.83

Q2 2019

Shares 45,574 Value ($000) $2,237 Avg Close $38.79 Range $37.00 - $40.91

Q1 2019

Shares 45,572 Value ($000) $2,148 Avg Close $36.14 Range $32.70 - $38.77

Q4 2018

Shares 46,100 Value ($000) $1,948 Avg Close $35.19 Range $32.65 - $37.38

Q3 2018

Shares 46,309 Value ($000) $1,971 Avg Close $34.13 Range $32.72 - $35.18

Q2 2018

Shares 46,307 Value ($000) $1,960 Avg Close $32.46 Range $30.20 - $34.35

Q1 2018

Shares 46,454 Value ($000) $1,898 Avg Close $30.84 Range $28.88 - $33.21

Q4 2017

Shares 44,451 Value ($000) $1,894 Avg Close $33.80 Range $31.68 - $35.41

Q3 2017

Shares 44,949 Value ($000) $1,869 Avg Close $32.04 Range $30.14 - $33.72

Q2 2017

Shares 45,105 Value ($000) $1,812 Avg Close $30.93 Range $29.83 - $32.31

Q1 2017

Shares 45,102 Value ($000) $1,787 Avg Close $29.08 Range $27.58 - $30.63

Q4 2016

Shares 45,700 Value ($000) $1,732 Avg Close $27.74 Range $26.27 - $29.13

Q3 2016

Shares 46,697 Value ($000) $1,789 Avg Close $29.26 Range $27.72 - $30.41

Q2 2016

Shares 49,695 Value ($000) $1,973 Avg Close $27.46 Range $25.25 - $29.85

Q1 2016

Shares 24,846 Value ($000) $1,846 Avg Close $24.74 Range $22.13 - $27.34

Q4 2015

Shares 24,945 Value ($000) $1,558 Avg Close $21.84 Range $20.45 - $23.41

Q3 2015

Shares 25,055 Value ($000) $1,465 Avg Close $21.20 Range $19.59 - $22.72

Q2 2015

Shares 25,055 Value ($000) $1,446 Avg Close $21.63 Range $20.41 - $22.74

Q1 2015

Shares 25,355 Value ($000) $1,597 Avg Close $23.04 Range $21.25 - $25.01

Q4 2014

Shares 25,355 Value ($000) $1,684 Avg Close $21.73 Range $19.32 - $24.55

Q3 2014

Shares 25,355 Value ($000) $1,405 Avg Close $20.07 Range $19.08 - $21.06

Q2 2014

Shares 26,355 Value ($000) $1,604 Avg Close $19.98 Range $19.02 - $21.06

Q1 2014

Shares 26,555 Value ($000) $1,509 Avg Close $18.07 Range $16.97 - $19.54

Q4 2013

Shares 26,555 Value ($000) $1,370 Avg Close $17.48 Range $16.43 - $18.23

Q3 2013

Shares 26,655 Value ($000) $1,321 Avg Close $17.15 Range $16.21 - $18.15

Q2 2013

Shares 27,505 Value ($000) $1,387 Avg Close $16.89 Range $15.60 - $17.85

Period	Shares	Value ($000)	Average Close	Price Range
Q4 2025	16,272	$1,058	$66.83	$64.30 - $69.59
Q3 2025	16,272	$1,097	$63.88	$59.07 - $67.04
Q2 2025	16,672	$1,008	$60.10	$55.76 - $64.19
Q1 2025	17,502	$1,126	$59.57	$54.52 - $64.99
Q4 2024	19,202	$1,136	$58.37	$54.30 - $62.16
Q3 2024	20,602	$1,250	$54.38	$48.12 - $58.63
Q2 2024	20,746	$1,056	$47.71	$44.54 - $49.81
Q1 2024	21,346	$1,076	$46.11	$44.14 - $48.90
Q4 2023	23,646	$1,213	$46.45	$41.77 - $50.29
Q3 2023	31,246	$1,514	$47.84	$44.23 - $51.62
Q2 2023	31,496	$1,653	$49.05	$46.13 - $51.23
Q1 2023	31,996	$1,709	$48.28	$45.19 - $50.77
Q4 2022	33,096	$1,827	$48.07	$42.22 - $51.90
Q3 2022	33,096	$1,754	$53.87	$47.25 - $57.82
Q2 2022	33,496	$1,963	$53.50	$48.14 - $57.66
Q1 2022	33,496	$2,093	$52.37	$48.33 - $55.78
Q4 2021	33,646	$2,068	$50.05	$47.35 - $54.07
Q3 2021	33,696	$1,886	$51.28	$47.64 - $54.21
Q2 2021	34,290	$1,912	$48.83	$45.94 - $51.03
Q1 2021	35,090	$1,900	$42.55	$39.42 - $47.06
Q4 2020	42,090	$2,169	$45.61	$40.48 - $49.39
Q3 2020	43,140	$2,228	$44.02	$39.84 - $46.94
Q2 2020	44,240	$2,116	$40.72	$36.29 - $45.31
Q1 2020	45,081	$2,177	$45.48	$31.34 - $50.16
Q4 2019	45,079	$2,467	$43.82	$42.11 - $45.80
Q3 2019	45,527	$2,455	$42.08	$39.53 - $44.83
Q2 2019	45,574	$2,237	$38.79	$37.00 - $40.91
Q1 2019	45,572	$2,148	$36.14	$32.70 - $38.77
Q4 2018	46,100	$1,948	$35.19	$32.65 - $37.38
Q3 2018	46,309	$1,971	$34.13	$32.72 - $35.18
Q2 2018	46,307	$1,960	$32.46	$30.20 - $34.35
Q1 2018	46,454	$1,898	$30.84	$28.88 - $33.21
Q4 2017	44,451	$1,894	$33.80	$31.68 - $35.41
Q3 2017	44,949	$1,869	$32.04	$30.14 - $33.72
Q2 2017	45,105	$1,812	$30.93	$29.83 - $32.31
Q1 2017	45,102	$1,787	$29.08	$27.58 - $30.63
Q4 2016	45,700	$1,732	$27.74	$26.27 - $29.13
Q3 2016	46,697	$1,789	$29.26	$27.72 - $30.41
Q2 2016	49,695	$1,973	$27.46	$25.25 - $29.85
Q1 2016	24,846	$1,846	$24.74	$22.13 - $27.34
Q4 2015	24,945	$1,558	$21.84	$20.45 - $23.41
Q3 2015	25,055	$1,465	$21.20	$19.59 - $22.72
Q2 2015	25,055	$1,446	$21.63	$20.41 - $22.74
Q1 2015	25,355	$1,597	$23.04	$21.25 - $25.01
Q4 2014	25,355	$1,684	$21.73	$19.32 - $24.55
Q3 2014	25,355	$1,405	$20.07	$19.08 - $21.06
Q2 2014	26,355	$1,604	$19.98	$19.02 - $21.06
Q1 2014	26,555	$1,509	$18.07	$16.97 - $19.54
Q4 2013	26,555	$1,370	$17.48	$16.43 - $18.23
Q3 2013	26,655	$1,321	$17.15	$16.21 - $18.15
Q2 2013	27,505	$1,387	$16.89	$15.60 - $17.85