ALLIANT ENERGY CORP

Ticker: LNT CUSIP: 018802108 Class: COM

Assenagon Asset Management S.A.'s Holding History (CIK: 0001546007)

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

Q4 2025

Shares 255,377 Value ($000) $16,602 Avg Close $66.83 Range $64.30 - $69.59

Q3 2025

Shares 104,714 Value ($000) $7,059 Avg Close $63.88 Range $59.07 - $67.04

Q2 2025

Shares 76,738 Value ($000) $4,640 Avg Close $60.10 Range $55.76 - $64.19

Q1 2025

Shares 5,362 Value ($000) $345 Avg Close $59.57 Range $54.52 - $64.99

Q4 2024

Shares 146,572 Value ($000) $8,668 Avg Close $58.37 Range $54.30 - $62.16

Q3 2024

Shares 6,956 Value ($000) $422 Avg Close $54.38 Range $48.12 - $58.63

Q2 2024

Shares 4,062 Value ($000) $207 Avg Close $47.71 Range $44.54 - $49.81

Q1 2024

Shares 35,693 Value ($000) $1,799 Avg Close $46.11 Range $44.14 - $48.90

Q4 2023

Shares 532,726 Value ($000) $27,329 Avg Close $46.45 Range $41.77 - $50.29

Q3 2023

Shares 728,234 Value ($000) $35,283 Avg Close $47.84 Range $44.23 - $51.62

Q2 2023

Shares 22,072 Value ($000) $1,158 Avg Close $49.05 Range $46.13 - $51.23

Q1 2023

Shares 100,807 Value ($000) $5,383 Avg Close $48.28 Range $45.19 - $50.77

Q4 2022

Shares 198,869 Value ($000) $11 Avg Close $48.07 Range $42.22 - $51.90

Q3 2022

Shares 1,144,927 Value ($000) $60,670 Avg Close $53.87 Range $47.25 - $57.82

Q4 2021

Shares 4,474 Value ($000) $275 Avg Close $50.05 Range $47.35 - $54.07

Q3 2021

Shares 4,033 Value ($000) $226 Avg Close $51.28 Range $47.64 - $54.21

Q1 2021

Shares 43,662 Value ($000) $2,365 Avg Close $42.55 Range $39.42 - $47.06

Q4 2020

Shares 68,319 Value ($000) $3,520 Avg Close $45.61 Range $40.48 - $49.39

Q3 2020

Shares 538,378 Value ($000) $27,807 Avg Close $44.02 Range $39.84 - $46.94

Q2 2020

Shares 124,595 Value ($000) $5,961 Avg Close $40.72 Range $36.29 - $45.31

Q1 2020

Shares 55,162 Value ($000) $2,664 Avg Close $45.48 Range $31.34 - $50.16

Q4 2019

Shares 2,082,942 Value ($000) $113,979 Avg Close $43.82 Range $42.11 - $45.80

Q3 2019

Shares 28,153 Value ($000) $1,518 Avg Close $42.08 Range $39.53 - $44.83

Q2 2019

Shares 29,745 Value ($000) $1,460 Avg Close $38.79 Range $37.00 - $40.91

Q1 2019

Shares 15,800 Value ($000) $745 Avg Close $36.14 Range $32.70 - $38.77

Q4 2018

Shares 35,477 Value ($000) $1,499 Avg Close $35.19 Range $32.65 - $37.38

Q3 2018

Shares 138,193 Value ($000) $5,883 Avg Close $34.13 Range $32.72 - $35.18

Q1 2018

Shares 16,309 Value ($000) $666 Avg Close $30.84 Range $28.88 - $33.21

Q3 2017

Shares 295,788 Value ($000) $12,296 Avg Close $32.04 Range $30.14 - $33.72

Period	Shares	Value ($000)	Average Close	Price Range
Q4 2025	255,377	$16,602	$66.83	$64.30 - $69.59
Q3 2025	104,714	$7,059	$63.88	$59.07 - $67.04
Q2 2025	76,738	$4,640	$60.10	$55.76 - $64.19
Q1 2025	5,362	$345	$59.57	$54.52 - $64.99
Q4 2024	146,572	$8,668	$58.37	$54.30 - $62.16
Q3 2024	6,956	$422	$54.38	$48.12 - $58.63
Q2 2024	4,062	$207	$47.71	$44.54 - $49.81
Q1 2024	35,693	$1,799	$46.11	$44.14 - $48.90
Q4 2023	532,726	$27,329	$46.45	$41.77 - $50.29
Q3 2023	728,234	$35,283	$47.84	$44.23 - $51.62
Q2 2023	22,072	$1,158	$49.05	$46.13 - $51.23
Q1 2023	100,807	$5,383	$48.28	$45.19 - $50.77
Q4 2022	198,869	$11	$48.07	$42.22 - $51.90
Q3 2022	1,144,927	$60,670	$53.87	$47.25 - $57.82
Q4 2021	4,474	$275	$50.05	$47.35 - $54.07
Q3 2021	4,033	$226	$51.28	$47.64 - $54.21
Q1 2021	43,662	$2,365	$42.55	$39.42 - $47.06
Q4 2020	68,319	$3,520	$45.61	$40.48 - $49.39
Q3 2020	538,378	$27,807	$44.02	$39.84 - $46.94
Q2 2020	124,595	$5,961	$40.72	$36.29 - $45.31
Q1 2020	55,162	$2,664	$45.48	$31.34 - $50.16
Q4 2019	2,082,942	$113,979	$43.82	$42.11 - $45.80
Q3 2019	28,153	$1,518	$42.08	$39.53 - $44.83
Q2 2019	29,745	$1,460	$38.79	$37.00 - $40.91
Q1 2019	15,800	$745	$36.14	$32.70 - $38.77
Q4 2018	35,477	$1,499	$35.19	$32.65 - $37.38
Q3 2018	138,193	$5,883	$34.13	$32.72 - $35.18
Q1 2018	16,309	$666	$30.84	$28.88 - $33.21
Q3 2017	295,788	$12,296	$32.04	$30.14 - $33.72