ALLIANT ENERGY CORP

Ticker: LNT CUSIP: 018802108 Class: COM

Optiver Holding B.V.'s Holding History (CIK: 0001859606)

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

Q4 2025

Shares 254 Value ($000) $17 Avg Close $66.83 Range $64.30 - $69.59

Q4 2024

Shares 912 Value ($000) $54 Avg Close $58.37 Range $54.30 - $62.16

Q3 2024

Shares 189 Value ($000) $11 Avg Close $54.38 Range $48.12 - $58.63

Period	Shares	Value ($000)	Average Close	Price Range
Q4 2025	254	$17	$66.83	$64.30 - $69.59
Q4 2024	912	$54	$58.37	$54.30 - $62.16
Q3 2024	189	$11	$54.38	$48.12 - $58.63