ALLIANT ENERGY CORP

Ticker: LNT CUSIP: 018802108 Class: COM

GATEWAY INVESTMENT ADVISERS LLC's Holding History (CIK: 0001114618)

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

Q4 2025

Shares 316,407 Value ($000) $20,570 Avg Close $66.83 Range $64.30 - $69.59

Q3 2025

Shares 289,769 Value ($000) $19,533 Avg Close $63.88 Range $59.07 - $67.04

Q2 2025

Shares 289,215 Value ($000) $17,489 Avg Close $60.10 Range $55.76 - $64.19

Q1 2025

Shares 289,215 Value ($000) $18,611 Avg Close $59.57 Range $54.52 - $64.99

Q4 2024

Shares 293,998 Value ($000) $17,387 Avg Close $58.37 Range $54.30 - $62.16

Q3 2024

Shares 295,842 Value ($000) $17,955 Avg Close $54.38 Range $48.12 - $58.63

Q2 2024

Shares 295,330 Value ($000) $15,032 Avg Close $47.71 Range $44.54 - $49.81

Q1 2024

Shares 357,579 Value ($000) $18,022 Avg Close $46.11 Range $44.14 - $48.90

Q4 2023

Shares 353,584 Value ($000) $18,139 Avg Close $46.45 Range $41.77 - $50.29

Q3 2023

Shares 353,584 Value ($000) $17,131 Avg Close $47.84 Range $44.23 - $51.62

Q2 2023

Shares 353,602 Value ($000) $18,557 Avg Close $49.05 Range $46.13 - $51.23

Q1 2023

Shares 340,729 Value ($000) $18,195 Avg Close $48.28 Range $45.19 - $50.77

Q4 2022

Shares 438,091 Value ($000) $24,187 Avg Close $48.07 Range $42.22 - $51.90

Q3 2022

Shares 439,703 Value ($000) $23,300 Avg Close $53.87 Range $47.25 - $57.82

Q2 2022

Shares 438,290 Value ($000) $25,688 Avg Close $53.50 Range $48.14 - $57.66

Q1 2022

Shares 417,189 Value ($000) $26,066 Avg Close $52.37 Range $48.33 - $55.78

Q4 2021

Shares 342,437 Value ($000) $21,050 Avg Close $50.05 Range $47.35 - $54.07

Q3 2021

Shares 340,935 Value ($000) $19,086 Avg Close $51.28 Range $47.64 - $54.21

Q2 2021

Shares 340,935 Value ($000) $19,011 Avg Close $48.83 Range $45.94 - $51.03

Q1 2021

Shares 341,347 Value ($000) $18,487 Avg Close $42.55 Range $39.42 - $47.06

Q4 2020

Shares 341,609 Value ($000) $17,603 Avg Close $45.61 Range $40.48 - $49.39

Q3 2020

Shares 428,802 Value ($000) $22,148 Avg Close $44.02 Range $39.84 - $46.94

Q2 2020

Shares 429,086 Value ($000) $20,527 Avg Close $40.72 Range $36.29 - $45.31

Q1 2020

Shares 428,425 Value ($000) $20,689 Avg Close $45.48 Range $31.34 - $50.16

Q4 2019

Shares 430,322 Value ($000) $23,547 Avg Close $43.82 Range $42.11 - $45.80

Q3 2019

Shares 486,004 Value ($000) $26,210 Avg Close $42.08 Range $39.53 - $44.83

Q2 2019

Shares 544,318 Value ($000) $26,715 Avg Close $38.79 Range $37.00 - $40.91

Q1 2019

Shares 615,339 Value ($000) $29,001 Avg Close $36.14 Range $32.70 - $38.77

Q4 2018

Shares 650,952 Value ($000) $27,503 Avg Close $35.19 Range $32.65 - $37.38

Q3 2018

Shares 645,310 Value ($000) $27,471 Avg Close $34.13 Range $32.72 - $35.18

Q2 2018

Shares 650,884 Value ($000) $27,545 Avg Close $32.46 Range $30.20 - $34.35

Q1 2018

Shares 647,534 Value ($000) $26,458 Avg Close $30.84 Range $28.88 - $33.21

Q4 2017

Shares 597,782 Value ($000) $25,471 Avg Close $33.80 Range $31.68 - $35.41

Q3 2017

Shares 485,698 Value ($000) $20,190 Avg Close $32.04 Range $30.14 - $33.72

Q2 2017

Shares 486,486 Value ($000) $19,542 Avg Close $30.93 Range $29.83 - $32.31

Q1 2017

Shares 340,573 Value ($000) $13,490 Avg Close $29.08 Range $27.58 - $30.63

Q4 2016

Shares 498,679 Value ($000) $18,895 Avg Close $27.74 Range $26.27 - $29.13

Q3 2016

Shares 605,369 Value ($000) $23,192 Avg Close $29.26 Range $27.72 - $30.41

Q2 2016

Shares 442,139 Value ($000) $17,553 Avg Close $27.46 Range $25.25 - $29.85

Q1 2016

Shares 243,830 Value ($000) $18,112 Avg Close $24.74 Range $22.13 - $27.34

Q4 2015

Shares 194,493 Value ($000) $12,146 Avg Close $21.84 Range $20.45 - $23.41

Q3 2015

Shares 122,166 Value ($000) $7,145 Avg Close $21.20 Range $19.59 - $22.72

Q2 2015

Shares 62,429 Value ($000) $3,603 Avg Close $21.63 Range $20.41 - $22.74

Q1 2015

Shares 4,707 Value ($000) $297 Avg Close $23.04 Range $21.25 - $25.01

Q4 2014

Shares 3,498 Value ($000) $232 Avg Close $21.73 Range $19.32 - $24.55

Period	Shares	Value ($000)	Average Close	Price Range
Q4 2025	316,407	$20,570	$66.83	$64.30 - $69.59
Q3 2025	289,769	$19,533	$63.88	$59.07 - $67.04
Q2 2025	289,215	$17,489	$60.10	$55.76 - $64.19
Q1 2025	289,215	$18,611	$59.57	$54.52 - $64.99
Q4 2024	293,998	$17,387	$58.37	$54.30 - $62.16
Q3 2024	295,842	$17,955	$54.38	$48.12 - $58.63
Q2 2024	295,330	$15,032	$47.71	$44.54 - $49.81
Q1 2024	357,579	$18,022	$46.11	$44.14 - $48.90
Q4 2023	353,584	$18,139	$46.45	$41.77 - $50.29
Q3 2023	353,584	$17,131	$47.84	$44.23 - $51.62
Q2 2023	353,602	$18,557	$49.05	$46.13 - $51.23
Q1 2023	340,729	$18,195	$48.28	$45.19 - $50.77
Q4 2022	438,091	$24,187	$48.07	$42.22 - $51.90
Q3 2022	439,703	$23,300	$53.87	$47.25 - $57.82
Q2 2022	438,290	$25,688	$53.50	$48.14 - $57.66
Q1 2022	417,189	$26,066	$52.37	$48.33 - $55.78
Q4 2021	342,437	$21,050	$50.05	$47.35 - $54.07
Q3 2021	340,935	$19,086	$51.28	$47.64 - $54.21
Q2 2021	340,935	$19,011	$48.83	$45.94 - $51.03
Q1 2021	341,347	$18,487	$42.55	$39.42 - $47.06
Q4 2020	341,609	$17,603	$45.61	$40.48 - $49.39
Q3 2020	428,802	$22,148	$44.02	$39.84 - $46.94
Q2 2020	429,086	$20,527	$40.72	$36.29 - $45.31
Q1 2020	428,425	$20,689	$45.48	$31.34 - $50.16
Q4 2019	430,322	$23,547	$43.82	$42.11 - $45.80
Q3 2019	486,004	$26,210	$42.08	$39.53 - $44.83
Q2 2019	544,318	$26,715	$38.79	$37.00 - $40.91
Q1 2019	615,339	$29,001	$36.14	$32.70 - $38.77
Q4 2018	650,952	$27,503	$35.19	$32.65 - $37.38
Q3 2018	645,310	$27,471	$34.13	$32.72 - $35.18
Q2 2018	650,884	$27,545	$32.46	$30.20 - $34.35
Q1 2018	647,534	$26,458	$30.84	$28.88 - $33.21
Q4 2017	597,782	$25,471	$33.80	$31.68 - $35.41
Q3 2017	485,698	$20,190	$32.04	$30.14 - $33.72
Q2 2017	486,486	$19,542	$30.93	$29.83 - $32.31
Q1 2017	340,573	$13,490	$29.08	$27.58 - $30.63
Q4 2016	498,679	$18,895	$27.74	$26.27 - $29.13
Q3 2016	605,369	$23,192	$29.26	$27.72 - $30.41
Q2 2016	442,139	$17,553	$27.46	$25.25 - $29.85
Q1 2016	243,830	$18,112	$24.74	$22.13 - $27.34
Q4 2015	194,493	$12,146	$21.84	$20.45 - $23.41
Q3 2015	122,166	$7,145	$21.20	$19.59 - $22.72
Q2 2015	62,429	$3,603	$21.63	$20.41 - $22.74
Q1 2015	4,707	$297	$23.04	$21.25 - $25.01
Q4 2014	3,498	$232	$21.73	$19.32 - $24.55