ALLIANT ENERGY CORP

Ticker: LNT CUSIP: 018802108 Class: COM

CULLEN/FROST BANKERS, INC.'s Holding History (CIK: 0000039263)

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

Q4 2025

Shares 7,771 Value ($000) $505 Avg Close $66.83 Range $64.30 - $69.59

Q3 2025

Shares 7,780 Value ($000) $524 Avg Close $63.88 Range $59.07 - $67.04

Q2 2025

Shares 8,043 Value ($000) $486 Avg Close $60.10 Range $55.76 - $64.19

Q1 2025

Shares 8,043 Value ($000) $518 Avg Close $59.57 Range $54.52 - $64.99

Q4 2024

Shares 8,043 Value ($000) $476 Avg Close $58.37 Range $54.30 - $62.16

Q3 2024

Shares 8,103 Value ($000) $492 Avg Close $54.38 Range $48.12 - $58.63

Q2 2024

Shares 8,653 Value ($000) $440 Avg Close $47.71 Range $44.54 - $49.81

Q1 2024

Shares 9,145 Value ($000) $461 Avg Close $46.11 Range $44.14 - $48.90

Q4 2023

Shares 9,545 Value ($000) $490 Avg Close $46.45 Range $41.77 - $50.29

Q3 2023

Shares 10,375 Value ($000) $503 Avg Close $47.84 Range $44.23 - $51.62

Q2 2023

Shares 10,655 Value ($000) $559 Avg Close $49.05 Range $46.13 - $51.23

Q1 2023

Shares 10,675 Value ($000) $570 Avg Close $48.28 Range $45.19 - $50.77

Q4 2022

Shares 11,163 Value ($000) $616 Avg Close $48.07 Range $42.22 - $51.90

Q3 2022

Shares 7,793 Value ($000) $413 Avg Close $53.87 Range $47.25 - $57.82

Q2 2022

Shares 16,207 Value ($000) $950 Avg Close $53.50 Range $48.14 - $57.66

Q1 2022

Shares 16,825 Value ($000) $1,051 Avg Close $52.37 Range $48.33 - $55.78

Q4 2021

Shares 17,004 Value ($000) $1,045 Avg Close $50.05 Range $47.35 - $54.07

Q3 2021

Shares 8,379 Value ($000) $469 Avg Close $51.28 Range $47.64 - $54.21

Q2 2021

Shares 8,379 Value ($000) $467 Avg Close $48.83 Range $45.94 - $51.03

Q1 2021

Shares 9,500 Value ($000) $515 Avg Close $42.55 Range $39.42 - $47.06

Q4 2020

Shares 10,327 Value ($000) $532 Avg Close $45.61 Range $40.48 - $49.39

Q3 2020

Shares 10,327 Value ($000) $533 Avg Close $44.02 Range $39.84 - $46.94

Q2 2020

Shares 10,300 Value ($000) $493 Avg Close $40.72 Range $36.29 - $45.31

Q1 2020

Shares 10,673 Value ($000) $515 Avg Close $45.48 Range $31.34 - $50.16

Q4 2019

Shares 11,795 Value ($000) $646 Avg Close $43.82 Range $42.11 - $45.80

Q3 2019

Shares 11,870 Value ($000) $640 Avg Close $42.08 Range $39.53 - $44.83

Q2 2019

Shares 13,747 Value ($000) $675 Avg Close $38.79 Range $37.00 - $40.91

Q1 2019

Shares 13,595 Value ($000) $641 Avg Close $36.14 Range $32.70 - $38.77

Q4 2018

Shares 15,970 Value ($000) $675 Avg Close $35.19 Range $32.65 - $37.38

Q3 2018

Shares 16,000 Value ($000) $681 Avg Close $34.13 Range $32.72 - $35.18

Q2 2018

Shares 16,150 Value ($000) $684 Avg Close $32.46 Range $30.20 - $34.35

Q1 2018

Shares 17,720 Value ($000) $724 Avg Close $30.84 Range $28.88 - $33.21

Q4 2017

Shares 18,823 Value ($000) $802 Avg Close $33.80 Range $31.68 - $35.41

Q3 2017

Shares 20,525 Value ($000) $853 Avg Close $32.04 Range $30.14 - $33.72

Q2 2017

Shares 22,630 Value ($000) $909 Avg Close $30.93 Range $29.83 - $32.31

Q1 2017

Shares 26,266 Value ($000) $1,040 Avg Close $29.08 Range $27.58 - $30.63

Q4 2016

Shares 31,581 Value ($000) $1,197 Avg Close $27.74 Range $26.27 - $29.13

Q3 2016

Shares 33,146 Value ($000) $1,270 Avg Close $29.26 Range $27.72 - $30.41

Q2 2016

Shares 32,516 Value ($000) $1,290 Avg Close $27.46 Range $25.25 - $29.85

Q1 2016

Shares 16,773 Value ($000) $1,246 Avg Close $24.74 Range $22.13 - $27.34

Q4 2015

Shares 16,878 Value ($000) $1,054 Avg Close $21.84 Range $20.45 - $23.41

Q3 2015

Shares 16,878 Value ($000) $987 Avg Close $21.20 Range $19.59 - $22.72

Q2 2015

Shares 17,088 Value ($000) $986 Avg Close $21.63 Range $20.41 - $22.74

Q1 2015

Shares 18,312 Value ($000) $1,154 Avg Close $23.04 Range $21.25 - $25.01

Q4 2014

Shares 17,907 Value ($000) $1,189 Avg Close $21.73 Range $19.32 - $24.55

Q3 2014

Shares 18,217 Value ($000) $1,010 Avg Close $20.07 Range $19.08 - $21.06

Q2 2014

Shares 19,021 Value ($000) $1,158 Avg Close $19.98 Range $19.02 - $21.06

Q1 2014

Shares 19,676 Value ($000) $1,117 Avg Close $18.07 Range $16.97 - $19.54

Q4 2013

Shares 21,332 Value ($000) $1,101 Avg Close $17.48 Range $16.43 - $18.23

Q3 2013

Shares 21,620 Value ($000) $1,072 Avg Close $17.15 Range $16.21 - $18.15

Q2 2013

Shares 22,171 Value ($000) $1,118 Avg Close $16.89 Range $15.60 - $17.85

Period	Shares	Value ($000)	Average Close	Price Range
Q4 2025	7,771	$505	$66.83	$64.30 - $69.59
Q3 2025	7,780	$524	$63.88	$59.07 - $67.04
Q2 2025	8,043	$486	$60.10	$55.76 - $64.19
Q1 2025	8,043	$518	$59.57	$54.52 - $64.99
Q4 2024	8,043	$476	$58.37	$54.30 - $62.16
Q3 2024	8,103	$492	$54.38	$48.12 - $58.63
Q2 2024	8,653	$440	$47.71	$44.54 - $49.81
Q1 2024	9,145	$461	$46.11	$44.14 - $48.90
Q4 2023	9,545	$490	$46.45	$41.77 - $50.29
Q3 2023	10,375	$503	$47.84	$44.23 - $51.62
Q2 2023	10,655	$559	$49.05	$46.13 - $51.23
Q1 2023	10,675	$570	$48.28	$45.19 - $50.77
Q4 2022	11,163	$616	$48.07	$42.22 - $51.90
Q3 2022	7,793	$413	$53.87	$47.25 - $57.82
Q2 2022	16,207	$950	$53.50	$48.14 - $57.66
Q1 2022	16,825	$1,051	$52.37	$48.33 - $55.78
Q4 2021	17,004	$1,045	$50.05	$47.35 - $54.07
Q3 2021	8,379	$469	$51.28	$47.64 - $54.21
Q2 2021	8,379	$467	$48.83	$45.94 - $51.03
Q1 2021	9,500	$515	$42.55	$39.42 - $47.06
Q4 2020	10,327	$532	$45.61	$40.48 - $49.39
Q3 2020	10,327	$533	$44.02	$39.84 - $46.94
Q2 2020	10,300	$493	$40.72	$36.29 - $45.31
Q1 2020	10,673	$515	$45.48	$31.34 - $50.16
Q4 2019	11,795	$646	$43.82	$42.11 - $45.80
Q3 2019	11,870	$640	$42.08	$39.53 - $44.83
Q2 2019	13,747	$675	$38.79	$37.00 - $40.91
Q1 2019	13,595	$641	$36.14	$32.70 - $38.77
Q4 2018	15,970	$675	$35.19	$32.65 - $37.38
Q3 2018	16,000	$681	$34.13	$32.72 - $35.18
Q2 2018	16,150	$684	$32.46	$30.20 - $34.35
Q1 2018	17,720	$724	$30.84	$28.88 - $33.21
Q4 2017	18,823	$802	$33.80	$31.68 - $35.41
Q3 2017	20,525	$853	$32.04	$30.14 - $33.72
Q2 2017	22,630	$909	$30.93	$29.83 - $32.31
Q1 2017	26,266	$1,040	$29.08	$27.58 - $30.63
Q4 2016	31,581	$1,197	$27.74	$26.27 - $29.13
Q3 2016	33,146	$1,270	$29.26	$27.72 - $30.41
Q2 2016	32,516	$1,290	$27.46	$25.25 - $29.85
Q1 2016	16,773	$1,246	$24.74	$22.13 - $27.34
Q4 2015	16,878	$1,054	$21.84	$20.45 - $23.41
Q3 2015	16,878	$987	$21.20	$19.59 - $22.72
Q2 2015	17,088	$986	$21.63	$20.41 - $22.74
Q1 2015	18,312	$1,154	$23.04	$21.25 - $25.01
Q4 2014	17,907	$1,189	$21.73	$19.32 - $24.55
Q3 2014	18,217	$1,010	$20.07	$19.08 - $21.06
Q2 2014	19,021	$1,158	$19.98	$19.02 - $21.06
Q1 2014	19,676	$1,117	$18.07	$16.97 - $19.54
Q4 2013	21,332	$1,101	$17.48	$16.43 - $18.23
Q3 2013	21,620	$1,072	$17.15	$16.21 - $18.15
Q2 2013	22,171	$1,118	$16.89	$15.60 - $17.85