ALLIANT ENERGY CORP

Ticker: LNT CUSIP: 018802108 Class: COM

BRITISH COLUMBIA INVESTMENT MANAGEMENT Corp's Holding History (CIK: 0001228242)

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

Q4 2025

Shares 45,510 Value ($000) $2,959 Avg Close $66.83 Range $64.30 - $69.59

Q3 2025

Shares 36,918 Value ($000) $2,489 Avg Close $63.88 Range $59.07 - $67.04

Q2 2025

Shares 40,426 Value ($000) $2,445 Avg Close $60.10 Range $55.76 - $64.19

Q1 2025

Shares 49,062 Value ($000) $3,157 Avg Close $59.57 Range $54.52 - $64.99

Q4 2024

Shares 49,109 Value ($000) $2,904 Avg Close $58.37 Range $54.30 - $62.16

Q3 2024

Shares 42,770 Value ($000) $2,596 Avg Close $54.38 Range $48.12 - $58.63

Q2 2024

Shares 49,099 Value ($000) $2,499 Avg Close $47.71 Range $44.54 - $49.81

Q1 2024

Shares 30,466 Value ($000) $1,535 Avg Close $46.11 Range $44.14 - $48.90

Q4 2023

Shares 29,077 Value ($000) $1,492 Avg Close $46.45 Range $41.77 - $50.29

Q3 2023

Shares 22,722 Value ($000) $1,101 Avg Close $47.84 Range $44.23 - $51.62

Q2 2023

Shares 22,722 Value ($000) $1,192 Avg Close $49.05 Range $46.13 - $51.23

Q1 2023

Shares 22,398 Value ($000) $1,196 Avg Close $48.28 Range $45.19 - $50.77

Q4 2022

Shares 22,079 Value ($000) $1,219 Avg Close $48.07 Range $42.22 - $51.90

Q3 2022

Shares 24,548 Value ($000) $1,301 Avg Close $53.87 Range $47.25 - $57.82

Q2 2022

Shares 28,950 Value ($000) $1,697 Avg Close $53.50 Range $48.14 - $57.66

Q1 2022

Shares 38,651 Value ($000) $2,415 Avg Close $52.37 Range $48.33 - $55.78

Q4 2021

Shares 43,945 Value ($000) $2,701 Avg Close $50.05 Range $47.35 - $54.07

Q3 2021

Shares 46,242 Value ($000) $2,589 Avg Close $51.28 Range $47.64 - $54.21

Q2 2021

Shares 46,242 Value ($000) $2,578 Avg Close $48.83 Range $45.94 - $51.03

Q1 2021

Shares 40,951 Value ($000) $2,218 Avg Close $42.55 Range $39.42 - $47.06

Q4 2020

Shares 42,109 Value ($000) $2,170 Avg Close $45.61 Range $40.48 - $49.39

Q3 2020

Shares 43,271 Value ($000) $2,235 Avg Close $44.02 Range $39.84 - $46.94

Q2 2020

Shares 39,265 Value ($000) $1,878 Avg Close $40.72 Range $36.29 - $45.31

Q1 2020

Shares 26,758 Value ($000) $1,292 Avg Close $45.48 Range $31.34 - $50.16

Q4 2019

Shares 55,970 Value ($000) $3,063 Avg Close $43.82 Range $42.11 - $45.80

Q3 2019

Shares 186,623 Value ($000) $10,065 Avg Close $42.08 Range $39.53 - $44.83

Q2 2019

Shares 67,133 Value ($000) $3,295 Avg Close $38.79 Range $37.00 - $40.91

Q1 2019

Shares 64,392 Value ($000) $3,035 Avg Close $36.14 Range $32.70 - $38.77

Q4 2018

Shares 79,184 Value ($000) $3,346 Avg Close $35.19 Range $32.65 - $37.38

Q3 2018

Shares 71,211 Value ($000) $3,031 Avg Close $34.13 Range $32.72 - $35.18

Q2 2018

Shares 97,373 Value ($000) $4,121 Avg Close $32.46 Range $30.20 - $34.35

Q1 2018

Shares 131,119 Value ($000) $5,358 Avg Close $30.84 Range $28.88 - $33.21

Q4 2017

Shares 137,661 Value ($000) $5,866 Avg Close $33.80 Range $31.68 - $35.41

Q3 2017

Shares 114,897 Value ($000) $4,776 Avg Close $32.04 Range $30.14 - $33.72

Q2 2017

Shares 118,963 Value ($000) $4,779 Avg Close $30.93 Range $29.83 - $32.31

Q1 2017

Shares 151,129 Value ($000) $5,986 Avg Close $29.08 Range $27.58 - $30.63

Q4 2016

Shares 164,669 Value ($000) $6,239 Avg Close $27.74 Range $26.27 - $29.13

Q3 2016

Shares 196,462 Value ($000) $7,526 Avg Close $29.26 Range $27.72 - $30.41

Q2 2016

Shares 187,148 Value ($000) $7,430 Avg Close $27.46 Range $25.25 - $29.85

Q1 2016

Shares 87,150 Value ($000) $6,474 Avg Close $24.74 Range $22.13 - $27.34

Q4 2015

Shares 62,595 Value ($000) $3,909 Avg Close $21.84 Range $20.45 - $23.41

Q3 2015

Shares 29,031 Value ($000) $1,698 Avg Close $21.20 Range $19.59 - $22.72

Q2 2015

Shares 29,031 Value ($000) $1,676 Avg Close $21.63 Range $20.41 - $22.74

Q1 2015

Shares 29,031 Value ($000) $1,829 Avg Close $23.04 Range $21.25 - $25.01

Q4 2014

Shares 15,264 Value ($000) $1,014 Avg Close $21.73 Range $19.32 - $24.55

Q3 2014

Shares 15,264 Value ($000) $846 Avg Close $20.07 Range $19.08 - $21.06

Q2 2014

Shares 16,410 Value ($000) $999 Avg Close $19.98 Range $19.02 - $21.06

Q1 2014

Shares 6,661 Value ($000) $378 Avg Close $18.07 Range $16.97 - $19.54

Q4 2013

Shares 6,661 Value ($000) $344 Avg Close $17.48 Range $16.43 - $18.23

Q3 2013

Shares 22,911 Value ($000) $1,135 Avg Close $17.15 Range $16.21 - $18.15

Q2 2013

Shares 11,197 Value ($000) $565 Avg Close $16.89 Range $15.60 - $17.85

Q1 2013

Shares 11,197 Value ($000) $562 Avg Close $15.50 Range $14.30 - $16.60

Q4 2012

Shares 44,240 Value ($000) $1,943 Avg Close — Range —

Q3 2012

Shares 19,538 Value ($000) $848 Avg Close — Range —

Q2 2012

Shares 21,262 Value ($000) $969 Avg Close — Range —

Q1 2012

Shares 26,162 Value ($000) $1,133 Avg Close — Range —

Q4 2011

Shares 41,221 Value ($000) $1,818 Avg Close — Range —

Q3 2011

Shares 22,576 Value ($000) $873 Avg Close — Range —

Period	Shares	Value ($000)	Average Close	Price Range
Q4 2025	45,510	$2,959	$66.83	$64.30 - $69.59
Q3 2025	36,918	$2,489	$63.88	$59.07 - $67.04
Q2 2025	40,426	$2,445	$60.10	$55.76 - $64.19
Q1 2025	49,062	$3,157	$59.57	$54.52 - $64.99
Q4 2024	49,109	$2,904	$58.37	$54.30 - $62.16
Q3 2024	42,770	$2,596	$54.38	$48.12 - $58.63
Q2 2024	49,099	$2,499	$47.71	$44.54 - $49.81
Q1 2024	30,466	$1,535	$46.11	$44.14 - $48.90
Q4 2023	29,077	$1,492	$46.45	$41.77 - $50.29
Q3 2023	22,722	$1,101	$47.84	$44.23 - $51.62
Q2 2023	22,722	$1,192	$49.05	$46.13 - $51.23
Q1 2023	22,398	$1,196	$48.28	$45.19 - $50.77
Q4 2022	22,079	$1,219	$48.07	$42.22 - $51.90
Q3 2022	24,548	$1,301	$53.87	$47.25 - $57.82
Q2 2022	28,950	$1,697	$53.50	$48.14 - $57.66
Q1 2022	38,651	$2,415	$52.37	$48.33 - $55.78
Q4 2021	43,945	$2,701	$50.05	$47.35 - $54.07
Q3 2021	46,242	$2,589	$51.28	$47.64 - $54.21
Q2 2021	46,242	$2,578	$48.83	$45.94 - $51.03
Q1 2021	40,951	$2,218	$42.55	$39.42 - $47.06
Q4 2020	42,109	$2,170	$45.61	$40.48 - $49.39
Q3 2020	43,271	$2,235	$44.02	$39.84 - $46.94
Q2 2020	39,265	$1,878	$40.72	$36.29 - $45.31
Q1 2020	26,758	$1,292	$45.48	$31.34 - $50.16
Q4 2019	55,970	$3,063	$43.82	$42.11 - $45.80
Q3 2019	186,623	$10,065	$42.08	$39.53 - $44.83
Q2 2019	67,133	$3,295	$38.79	$37.00 - $40.91
Q1 2019	64,392	$3,035	$36.14	$32.70 - $38.77
Q4 2018	79,184	$3,346	$35.19	$32.65 - $37.38
Q3 2018	71,211	$3,031	$34.13	$32.72 - $35.18
Q2 2018	97,373	$4,121	$32.46	$30.20 - $34.35
Q1 2018	131,119	$5,358	$30.84	$28.88 - $33.21
Q4 2017	137,661	$5,866	$33.80	$31.68 - $35.41
Q3 2017	114,897	$4,776	$32.04	$30.14 - $33.72
Q2 2017	118,963	$4,779	$30.93	$29.83 - $32.31
Q1 2017	151,129	$5,986	$29.08	$27.58 - $30.63
Q4 2016	164,669	$6,239	$27.74	$26.27 - $29.13
Q3 2016	196,462	$7,526	$29.26	$27.72 - $30.41
Q2 2016	187,148	$7,430	$27.46	$25.25 - $29.85
Q1 2016	87,150	$6,474	$24.74	$22.13 - $27.34
Q4 2015	62,595	$3,909	$21.84	$20.45 - $23.41
Q3 2015	29,031	$1,698	$21.20	$19.59 - $22.72
Q2 2015	29,031	$1,676	$21.63	$20.41 - $22.74
Q1 2015	29,031	$1,829	$23.04	$21.25 - $25.01
Q4 2014	15,264	$1,014	$21.73	$19.32 - $24.55
Q3 2014	15,264	$846	$20.07	$19.08 - $21.06
Q2 2014	16,410	$999	$19.98	$19.02 - $21.06
Q1 2014	6,661	$378	$18.07	$16.97 - $19.54
Q4 2013	6,661	$344	$17.48	$16.43 - $18.23
Q3 2013	22,911	$1,135	$17.15	$16.21 - $18.15
Q2 2013	11,197	$565	$16.89	$15.60 - $17.85
Q1 2013	11,197	$562	$15.50	$14.30 - $16.60
Q4 2012	44,240	$1,943	—	—
Q3 2012	19,538	$848	—	—
Q2 2012	21,262	$969	—	—
Q1 2012	26,162	$1,133	—	—
Q4 2011	41,221	$1,818	—	—
Q3 2011	22,576	$873	—	—