ALLIANT ENERGY CORP

Ticker: LNT CUSIP: 018802108 Class: COM

TWO SIGMA INVESTMENTS, LP's Holding History (CIK: 0001179392)

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

Q4 2025

Shares 240,943 Value ($000) $15,664 Avg Close $66.83 Range $64.30 - $69.59

Q3 2025

Shares 12,450 Value ($000) $839 Avg Close $63.88 Range $59.07 - $67.04

Q2 2025

Shares 24,951 Value ($000) $1,509 Avg Close $60.10 Range $55.76 - $64.19

Q1 2025

Shares 153,475 Value ($000) $9,876 Avg Close $59.57 Range $54.52 - $64.99

Q4 2024

Shares 15,867 Value ($000) $938 Avg Close $58.37 Range $54.30 - $62.16

Q2 2024

Shares 7,842 Value ($000) $399 Avg Close $47.71 Range $44.54 - $49.81

Q2 2023

Shares 30,425 Value ($000) $1,597 Avg Close $49.05 Range $46.13 - $51.23

Q1 2023

Shares 28,800 Value ($000) $1,538 Avg Close $48.28 Range $45.19 - $50.77

Q4 2022

Shares 62,931 Value ($000) $3,474 Avg Close $48.07 Range $42.22 - $51.90

Q3 2022

Shares 208,956 Value ($000) $11,073 Avg Close $53.87 Range $47.25 - $57.82

Q2 2022

Shares 102,273 Value ($000) $5,994 Avg Close $53.50 Range $48.14 - $57.66

Q4 2020

Shares 36,893 Value ($000) $1,901 Avg Close $45.61 Range $40.48 - $49.39

Q3 2020

Shares 75,621 Value ($000) $3,906 Avg Close $44.02 Range $39.84 - $46.94

Q4 2019

Shares 120,372 Value ($000) $6,587 Avg Close $43.82 Range $42.11 - $45.80

Q3 2019

Shares 121,040 Value ($000) $6,528 Avg Close $42.08 Range $39.53 - $44.83

Q2 2019

Shares 211,738 Value ($000) $10,392 Avg Close $38.79 Range $37.00 - $40.91

Q1 2019

Shares 151,020 Value ($000) $7,118 Avg Close $36.14 Range $32.70 - $38.77

Q4 2018

Shares 409,273 Value ($000) $17,292 Avg Close $35.19 Range $32.65 - $37.38

Q3 2018

Shares 178,893 Value ($000) $7,615 Avg Close $34.13 Range $32.72 - $35.18

Q4 2017

Shares 33,032 Value ($000) $1,407 Avg Close $33.80 Range $31.68 - $35.41

Q2 2017

Shares 189,042 Value ($000) $7,594 Avg Close $30.93 Range $29.83 - $32.31

Q3 2015

Shares 15,717 Value ($000) $919 Avg Close $21.20 Range $19.59 - $22.72

Q2 2015

Shares 30,528 Value ($000) $1,762 Avg Close $21.63 Range $20.41 - $22.74

Q1 2015

Shares 131,504 Value ($000) $8,285 Avg Close $23.04 Range $21.25 - $25.01

Q4 2014

Shares 6,371 Value ($000) $423 Avg Close $21.73 Range $19.32 - $24.55

Q3 2014

Shares 75,122 Value ($000) $4,163 Avg Close $20.07 Range $19.08 - $21.06

Q1 2014

Shares 164,376 Value ($000) $9,339 Avg Close $18.07 Range $16.97 - $19.54

Q4 2013

Shares 67,084 Value ($000) $3,462 Avg Close $17.48 Range $16.43 - $18.23

Q3 2013

Shares 149,267 Value ($000) $7,396 Avg Close $17.15 Range $16.21 - $18.15

Period	Shares	Value ($000)	Average Close	Price Range
Q4 2025	240,943	$15,664	$66.83	$64.30 - $69.59
Q3 2025	12,450	$839	$63.88	$59.07 - $67.04
Q2 2025	24,951	$1,509	$60.10	$55.76 - $64.19
Q1 2025	153,475	$9,876	$59.57	$54.52 - $64.99
Q4 2024	15,867	$938	$58.37	$54.30 - $62.16
Q2 2024	7,842	$399	$47.71	$44.54 - $49.81
Q2 2023	30,425	$1,597	$49.05	$46.13 - $51.23
Q1 2023	28,800	$1,538	$48.28	$45.19 - $50.77
Q4 2022	62,931	$3,474	$48.07	$42.22 - $51.90
Q3 2022	208,956	$11,073	$53.87	$47.25 - $57.82
Q2 2022	102,273	$5,994	$53.50	$48.14 - $57.66
Q4 2020	36,893	$1,901	$45.61	$40.48 - $49.39
Q3 2020	75,621	$3,906	$44.02	$39.84 - $46.94
Q4 2019	120,372	$6,587	$43.82	$42.11 - $45.80
Q3 2019	121,040	$6,528	$42.08	$39.53 - $44.83
Q2 2019	211,738	$10,392	$38.79	$37.00 - $40.91
Q1 2019	151,020	$7,118	$36.14	$32.70 - $38.77
Q4 2018	409,273	$17,292	$35.19	$32.65 - $37.38
Q3 2018	178,893	$7,615	$34.13	$32.72 - $35.18
Q4 2017	33,032	$1,407	$33.80	$31.68 - $35.41
Q2 2017	189,042	$7,594	$30.93	$29.83 - $32.31
Q3 2015	15,717	$919	$21.20	$19.59 - $22.72
Q2 2015	30,528	$1,762	$21.63	$20.41 - $22.74
Q1 2015	131,504	$8,285	$23.04	$21.25 - $25.01
Q4 2014	6,371	$423	$21.73	$19.32 - $24.55
Q3 2014	75,122	$4,163	$20.07	$19.08 - $21.06
Q1 2014	164,376	$9,339	$18.07	$16.97 - $19.54
Q4 2013	67,084	$3,462	$17.48	$16.43 - $18.23
Q3 2013	149,267	$7,396	$17.15	$16.21 - $18.15