ALLIANT ENERGY CORP

Ticker: LNT CUSIP: 018802108 Class: COM

Swiss National Bank's Holding History (CIK: 0001582202)

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

Q4 2025

Shares 704,200 Value ($000) $45,780 Avg Close $66.83 Range $64.30 - $69.59

Q3 2025

Shares 740,500 Value ($000) $49,917 Avg Close $63.88 Range $59.07 - $67.04

Q2 2025

Shares 777,500 Value ($000) $47,015 Avg Close $60.10 Range $55.76 - $64.19

Q1 2025

Shares 723,700 Value ($000) $46,570 Avg Close $59.57 Range $54.52 - $64.99

Q4 2024

Shares 724,700 Value ($000) $42,859 Avg Close $58.37 Range $54.30 - $62.16

Q3 2024

Shares 759,100 Value ($000) $46,070 Avg Close $54.38 Range $48.12 - $58.63

Q2 2024

Shares 759,100 Value ($000) $38,638 Avg Close $47.71 Range $44.54 - $49.81

Q1 2024

Shares 764,300 Value ($000) $38,521 Avg Close $46.11 Range $44.14 - $48.90

Q4 2023

Shares 790,300 Value ($000) $40,542 Avg Close $46.45 Range $41.77 - $50.29

Q3 2023

Shares 808,600 Value ($000) $39,177 Avg Close $47.84 Range $44.23 - $51.62

Q2 2023

Shares 906,900 Value ($000) $47,594 Avg Close $49.05 Range $46.13 - $51.23

Q1 2023

Shares 996,300 Value ($000) $53,202 Avg Close $48.28 Range $45.19 - $50.77

Q4 2022

Shares 1,019,900 Value ($000) $56,309 Avg Close $48.07 Range $42.22 - $51.90

Q3 2022

Shares 1,086,910 Value ($000) $57,595 Avg Close $53.87 Range $47.25 - $57.82

Q2 2022

Shares 1,084,410 Value ($000) $63,557 Avg Close $53.50 Range $48.14 - $57.66

Q1 2022

Shares 1,084,410 Value ($000) $67,754 Avg Close $52.37 Range $48.33 - $55.78

Q4 2021

Shares 951,010 Value ($000) $58,459 Avg Close $50.05 Range $47.35 - $54.07

Q3 2021

Shares 991,410 Value ($000) $55,499 Avg Close $51.28 Range $47.64 - $54.21

Q2 2021

Shares 1,019,310 Value ($000) $56,837 Avg Close $48.83 Range $45.94 - $51.03

Q1 2021

Shares 1,073,585 Value ($000) $58,145 Avg Close $42.55 Range $39.42 - $47.06

Q4 2020

Shares 1,056,385 Value ($000) $54,436 Avg Close $45.61 Range $40.48 - $49.39

Q3 2020

Shares 1,081,385 Value ($000) $55,854 Avg Close $44.02 Range $39.84 - $46.94

Q2 2020

Shares 1,079,385 Value ($000) $51,638 Avg Close $40.72 Range $36.29 - $45.31

Q1 2020

Shares 1,064,485 Value ($000) $51,404 Avg Close $45.48 Range $31.34 - $50.16

Q4 2019

Shares 850,385 Value ($000) $46,550 Avg Close $43.82 Range $42.11 - $45.80

Q3 2019

Shares 878,985 Value ($000) $47,465 Avg Close $42.08 Range $39.53 - $44.83

Q2 2019

Shares 874,898 Value ($000) $42,940 Avg Close $38.79 Range $37.00 - $40.91

Q1 2019

Shares 893,998 Value ($000) $42,125 Avg Close $36.14 Range $32.70 - $38.77

Q4 2018

Shares 864,898 Value ($000) $36,542 Avg Close $35.19 Range $32.65 - $37.38

Q3 2018

Shares 792,898 Value ($000) $33,754 Avg Close $34.13 Range $32.72 - $35.18

Q2 2018

Shares 764,898 Value ($000) $32,370 Avg Close $32.46 Range $30.20 - $34.35

Q1 2018

Shares 738,698 Value ($000) $30,183 Avg Close $30.84 Range $28.88 - $33.21

Q4 2017

Shares 851,098 Value ($000) $36,265 Avg Close $33.80 Range $31.68 - $35.41

Q3 2017

Shares 839,298 Value ($000) $34,890 Avg Close $32.04 Range $30.14 - $33.72

Q2 2017

Shares 829,498 Value ($000) $33,321 Avg Close $30.93 Range $29.83 - $32.31

Q1 2017

Shares 805,998 Value ($000) $31,926 Avg Close $29.08 Range $27.58 - $30.63

Q4 2016

Shares 627,798 Value ($000) $23,787 Avg Close $27.74 Range $26.27 - $29.13

Q3 2016

Shares 627,798 Value ($000) $24,051 Avg Close $29.26 Range $27.72 - $30.41

Q2 2016

Shares 636,198 Value ($000) $25,257 Avg Close $27.46 Range $25.25 - $29.85

Q1 2016

Shares 294,549 Value ($000) $20,969 Avg Close $24.74 Range $22.13 - $27.34

Q4 2015

Shares 204,849 Value ($000) $12,793 Avg Close $21.84 Range $20.45 - $23.41

Q3 2015

Shares 201,649 Value ($000) $11,794 Avg Close $21.20 Range $19.59 - $22.72

Q2 2015

Shares 179,149 Value ($000) $10,340 Avg Close $21.63 Range $20.41 - $22.74

Q1 2015

Shares 168,549 Value ($000) $10,619 Avg Close $23.04 Range $21.25 - $25.01

Q4 2014

Shares 102,549 Value ($000) $6,811 Avg Close $21.73 Range $19.32 - $24.55

Q3 2014

Shares 106,249 Value ($000) $5,887 Avg Close $20.07 Range $19.08 - $21.06

Q2 2014

Shares 108,049 Value ($000) $6,576 Avg Close $19.98 Range $19.02 - $21.06

Q1 2014

Shares 107,849 Value ($000) $6,127 Avg Close $18.07 Range $16.97 - $19.54

Q4 2013

Shares 117,649 Value ($000) $6,071 Avg Close $17.48 Range $16.43 - $18.23

Q3 2013

Shares 120,049 Value ($000) $5,948 Avg Close $17.15 Range $16.21 - $18.15

Q2 2013

Shares 118,149 Value ($000) $5,957 Avg Close $16.89 Range $15.60 - $17.85

Period	Shares	Value ($000)	Average Close	Price Range
Q4 2025	704,200	$45,780	$66.83	$64.30 - $69.59
Q3 2025	740,500	$49,917	$63.88	$59.07 - $67.04
Q2 2025	777,500	$47,015	$60.10	$55.76 - $64.19
Q1 2025	723,700	$46,570	$59.57	$54.52 - $64.99
Q4 2024	724,700	$42,859	$58.37	$54.30 - $62.16
Q3 2024	759,100	$46,070	$54.38	$48.12 - $58.63
Q2 2024	759,100	$38,638	$47.71	$44.54 - $49.81
Q1 2024	764,300	$38,521	$46.11	$44.14 - $48.90
Q4 2023	790,300	$40,542	$46.45	$41.77 - $50.29
Q3 2023	808,600	$39,177	$47.84	$44.23 - $51.62
Q2 2023	906,900	$47,594	$49.05	$46.13 - $51.23
Q1 2023	996,300	$53,202	$48.28	$45.19 - $50.77
Q4 2022	1,019,900	$56,309	$48.07	$42.22 - $51.90
Q3 2022	1,086,910	$57,595	$53.87	$47.25 - $57.82
Q2 2022	1,084,410	$63,557	$53.50	$48.14 - $57.66
Q1 2022	1,084,410	$67,754	$52.37	$48.33 - $55.78
Q4 2021	951,010	$58,459	$50.05	$47.35 - $54.07
Q3 2021	991,410	$55,499	$51.28	$47.64 - $54.21
Q2 2021	1,019,310	$56,837	$48.83	$45.94 - $51.03
Q1 2021	1,073,585	$58,145	$42.55	$39.42 - $47.06
Q4 2020	1,056,385	$54,436	$45.61	$40.48 - $49.39
Q3 2020	1,081,385	$55,854	$44.02	$39.84 - $46.94
Q2 2020	1,079,385	$51,638	$40.72	$36.29 - $45.31
Q1 2020	1,064,485	$51,404	$45.48	$31.34 - $50.16
Q4 2019	850,385	$46,550	$43.82	$42.11 - $45.80
Q3 2019	878,985	$47,465	$42.08	$39.53 - $44.83
Q2 2019	874,898	$42,940	$38.79	$37.00 - $40.91
Q1 2019	893,998	$42,125	$36.14	$32.70 - $38.77
Q4 2018	864,898	$36,542	$35.19	$32.65 - $37.38
Q3 2018	792,898	$33,754	$34.13	$32.72 - $35.18
Q2 2018	764,898	$32,370	$32.46	$30.20 - $34.35
Q1 2018	738,698	$30,183	$30.84	$28.88 - $33.21
Q4 2017	851,098	$36,265	$33.80	$31.68 - $35.41
Q3 2017	839,298	$34,890	$32.04	$30.14 - $33.72
Q2 2017	829,498	$33,321	$30.93	$29.83 - $32.31
Q1 2017	805,998	$31,926	$29.08	$27.58 - $30.63
Q4 2016	627,798	$23,787	$27.74	$26.27 - $29.13
Q3 2016	627,798	$24,051	$29.26	$27.72 - $30.41
Q2 2016	636,198	$25,257	$27.46	$25.25 - $29.85
Q1 2016	294,549	$20,969	$24.74	$22.13 - $27.34
Q4 2015	204,849	$12,793	$21.84	$20.45 - $23.41
Q3 2015	201,649	$11,794	$21.20	$19.59 - $22.72
Q2 2015	179,149	$10,340	$21.63	$20.41 - $22.74
Q1 2015	168,549	$10,619	$23.04	$21.25 - $25.01
Q4 2014	102,549	$6,811	$21.73	$19.32 - $24.55
Q3 2014	106,249	$5,887	$20.07	$19.08 - $21.06
Q2 2014	108,049	$6,576	$19.98	$19.02 - $21.06
Q1 2014	107,849	$6,127	$18.07	$16.97 - $19.54
Q4 2013	117,649	$6,071	$17.48	$16.43 - $18.23
Q3 2013	120,049	$5,948	$17.15	$16.21 - $18.15
Q2 2013	118,149	$5,957	$16.89	$15.60 - $17.85