ALLIANT ENERGY CORP

Ticker: LNT CUSIP: 018802108 Class: COM

OPPENHEIMER & CO INC's Holding History (CIK: 0000822581)

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

Q3 2025

Shares 15,716 Value ($000) $1,059 Avg Close $63.88 Range $59.07 - $67.04

Q2 2025

Shares 16,261 Value ($000) $983 Avg Close $60.10 Range $55.76 - $64.19

Q1 2025

Shares 16,326 Value ($000) $1,051 Avg Close $59.57 Range $54.52 - $64.99

Q4 2024

Shares 30,632 Value ($000) $1,812 Avg Close $58.37 Range $54.30 - $62.16

Q3 2024

Shares 29,527 Value ($000) $1,792 Avg Close $54.38 Range $48.12 - $58.63

Q2 2024

Shares 29,398 Value ($000) $1,496 Avg Close $47.71 Range $44.54 - $49.81

Q1 2024

Shares 28,908 Value ($000) $1,457 Avg Close $46.11 Range $44.14 - $48.90

Q4 2023

Shares 28,831 Value ($000) $1,479 Avg Close $46.45 Range $41.77 - $50.29

Q3 2023

Shares 27,297 Value ($000) $1,323 Avg Close $47.84 Range $44.23 - $51.62

Q2 2023

Shares 25,154 Value ($000) $1,320 Avg Close $49.05 Range $46.13 - $51.23

Q1 2023

Shares 24,698 Value ($000) $1,319 Avg Close $48.28 Range $45.19 - $50.77

Q4 2022

Shares 23,413 Value ($000) $1,293 Avg Close $48.07 Range $42.22 - $51.90

Q3 2022

Shares 22,313 Value ($000) $1,182 Avg Close $53.87 Range $47.25 - $57.82

Q2 2022

Shares 20,127 Value ($000) $1,180 Avg Close $53.50 Range $48.14 - $57.66

Q1 2022

Shares 19,925 Value ($000) $1,245 Avg Close $52.37 Range $48.33 - $55.78

Q4 2021

Shares 20,048 Value ($000) $1,233 Avg Close $50.05 Range $47.35 - $54.07

Q3 2021

Shares 22,952 Value ($000) $1,285 Avg Close $51.28 Range $47.64 - $54.21

Q2 2021

Shares 22,622 Value ($000) $1,261 Avg Close $48.83 Range $45.94 - $51.03

Q1 2021

Shares 22,562 Value ($000) $1,221 Avg Close $42.55 Range $39.42 - $47.06

Q4 2020

Shares 22,037 Value ($000) $1,136 Avg Close $45.61 Range $40.48 - $49.39

Q3 2020

Shares 22,024 Value ($000) $1,137 Avg Close $44.02 Range $39.84 - $46.94

Q2 2020

Shares 57,528 Value ($000) $2,753 Avg Close $40.72 Range $36.29 - $45.31

Q1 2020

Shares 56,915 Value ($000) $2,749 Avg Close $45.48 Range $31.34 - $50.16

Q4 2019

Shares 56,995 Value ($000) $3,119 Avg Close $43.82 Range $42.11 - $45.80

Q3 2019

Shares 57,012 Value ($000) $3,075 Avg Close $42.08 Range $39.53 - $44.83

Q2 2019

Shares 56,821 Value ($000) $2,788 Avg Close $38.79 Range $37.00 - $40.91

Q1 2019

Shares 56,395 Value ($000) $2,657 Avg Close $36.14 Range $32.70 - $38.77

Q4 2018

Shares 57,682 Value ($000) $2,438 Avg Close $35.19 Range $32.65 - $37.38

Q3 2018

Shares 56,687 Value ($000) $2,413 Avg Close $34.13 Range $32.72 - $35.18

Q2 2018

Shares 57,902 Value ($000) $2,450 Avg Close $32.46 Range $30.20 - $34.35

Q1 2018

Shares 66,277 Value ($000) $2,708 Avg Close $30.84 Range $28.88 - $33.21

Q4 2017

Shares 60,960 Value ($000) $2,598 Avg Close $33.80 Range $31.68 - $35.41

Q3 2017

Shares 56,613 Value ($000) $2,353 Avg Close $32.04 Range $30.14 - $33.72

Q2 2017

Shares 56,839 Value ($000) $2,283 Avg Close $30.93 Range $29.83 - $32.31

Q1 2017

Shares 59,375 Value ($000) $2,352 Avg Close $29.08 Range $27.58 - $30.63

Q4 2016

Shares 55,822 Value ($000) $2,115 Avg Close $27.74 Range $26.27 - $29.13

Q3 2016

Shares 51,215 Value ($000) $1,962 Avg Close $29.26 Range $27.72 - $30.41

Q2 2016

Shares 47,950 Value ($000) $1,904 Avg Close $27.46 Range $25.25 - $29.85

Q1 2016

Shares 29,975 Value ($000) $2,226 Avg Close $24.74 Range $22.13 - $27.34

Q4 2015

Shares 30,399 Value ($000) $1,898 Avg Close $21.84 Range $20.45 - $23.41

Q3 2015

Shares 30,499 Value ($000) $1,783 Avg Close $21.20 Range $19.59 - $22.72

Q2 2015

Shares 32,499 Value ($000) $1,876 Avg Close $21.63 Range $20.41 - $22.74

Q1 2015

Shares 32,499 Value ($000) $2,047 Avg Close $23.04 Range $21.25 - $25.01

Q4 2014

Shares 34,205 Value ($000) $2,272 Avg Close $21.73 Range $19.32 - $24.55

Q3 2014

Shares 34,205 Value ($000) $1,896 Avg Close $20.07 Range $19.08 - $21.06

Q2 2014

Shares 34,311 Value ($000) $2,089 Avg Close $19.98 Range $19.02 - $21.06

Q1 2014

Shares 34,255 Value ($000) $1,946 Avg Close $18.07 Range $16.97 - $19.54

Q4 2013

Shares 34,255 Value ($000) $1,768 Avg Close $17.48 Range $16.43 - $18.23

Q3 2013

Shares 34,555 Value ($000) $1,712 Avg Close $17.15 Range $16.21 - $18.15

Q2 2013

Shares 35,545 Value ($000) $1,792 Avg Close $16.89 Range $15.60 - $17.85

Period	Shares	Value ($000)	Average Close	Price Range
Q3 2025	15,716	$1,059	$63.88	$59.07 - $67.04
Q2 2025	16,261	$983	$60.10	$55.76 - $64.19
Q1 2025	16,326	$1,051	$59.57	$54.52 - $64.99
Q4 2024	30,632	$1,812	$58.37	$54.30 - $62.16
Q3 2024	29,527	$1,792	$54.38	$48.12 - $58.63
Q2 2024	29,398	$1,496	$47.71	$44.54 - $49.81
Q1 2024	28,908	$1,457	$46.11	$44.14 - $48.90
Q4 2023	28,831	$1,479	$46.45	$41.77 - $50.29
Q3 2023	27,297	$1,323	$47.84	$44.23 - $51.62
Q2 2023	25,154	$1,320	$49.05	$46.13 - $51.23
Q1 2023	24,698	$1,319	$48.28	$45.19 - $50.77
Q4 2022	23,413	$1,293	$48.07	$42.22 - $51.90
Q3 2022	22,313	$1,182	$53.87	$47.25 - $57.82
Q2 2022	20,127	$1,180	$53.50	$48.14 - $57.66
Q1 2022	19,925	$1,245	$52.37	$48.33 - $55.78
Q4 2021	20,048	$1,233	$50.05	$47.35 - $54.07
Q3 2021	22,952	$1,285	$51.28	$47.64 - $54.21
Q2 2021	22,622	$1,261	$48.83	$45.94 - $51.03
Q1 2021	22,562	$1,221	$42.55	$39.42 - $47.06
Q4 2020	22,037	$1,136	$45.61	$40.48 - $49.39
Q3 2020	22,024	$1,137	$44.02	$39.84 - $46.94
Q2 2020	57,528	$2,753	$40.72	$36.29 - $45.31
Q1 2020	56,915	$2,749	$45.48	$31.34 - $50.16
Q4 2019	56,995	$3,119	$43.82	$42.11 - $45.80
Q3 2019	57,012	$3,075	$42.08	$39.53 - $44.83
Q2 2019	56,821	$2,788	$38.79	$37.00 - $40.91
Q1 2019	56,395	$2,657	$36.14	$32.70 - $38.77
Q4 2018	57,682	$2,438	$35.19	$32.65 - $37.38
Q3 2018	56,687	$2,413	$34.13	$32.72 - $35.18
Q2 2018	57,902	$2,450	$32.46	$30.20 - $34.35
Q1 2018	66,277	$2,708	$30.84	$28.88 - $33.21
Q4 2017	60,960	$2,598	$33.80	$31.68 - $35.41
Q3 2017	56,613	$2,353	$32.04	$30.14 - $33.72
Q2 2017	56,839	$2,283	$30.93	$29.83 - $32.31
Q1 2017	59,375	$2,352	$29.08	$27.58 - $30.63
Q4 2016	55,822	$2,115	$27.74	$26.27 - $29.13
Q3 2016	51,215	$1,962	$29.26	$27.72 - $30.41
Q2 2016	47,950	$1,904	$27.46	$25.25 - $29.85
Q1 2016	29,975	$2,226	$24.74	$22.13 - $27.34
Q4 2015	30,399	$1,898	$21.84	$20.45 - $23.41
Q3 2015	30,499	$1,783	$21.20	$19.59 - $22.72
Q2 2015	32,499	$1,876	$21.63	$20.41 - $22.74
Q1 2015	32,499	$2,047	$23.04	$21.25 - $25.01
Q4 2014	34,205	$2,272	$21.73	$19.32 - $24.55
Q3 2014	34,205	$1,896	$20.07	$19.08 - $21.06
Q2 2014	34,311	$2,089	$19.98	$19.02 - $21.06
Q1 2014	34,255	$1,946	$18.07	$16.97 - $19.54
Q4 2013	34,255	$1,768	$17.48	$16.43 - $18.23
Q3 2013	34,555	$1,712	$17.15	$16.21 - $18.15
Q2 2013	35,545	$1,792	$16.89	$15.60 - $17.85