Common Equity

12 Months Ended

Dec. 31, 2022

Schedule of Common Equity [Line Items]

Common Equity

COMMON EQUITY

Common Share Activity - A summary of Alliant Energy’s common stock activity was as follows:

	2022	2021	2020
Shares outstanding, January 1	250,474,529	249,868,415	245,022,800
Equity forward agreements	—	—	4,275,127
Shareowner Direct Plan	437,669	492,565	472,283
Equity-based compensation plans	222,768	113,549	98,205
Shares outstanding, December 31	251,134,966	250,474,529	249,868,415

At December 31, 2022, Alliant Energy had a total of 13 million shares available for issuance in the aggregate, pursuant to its 2020 OIP, Shareowner Direct Plan and 401(k) Savings Plan.

At-the-Market Offering Program - In December 2022, Alliant Energy filed a prospectus supplement under which it may sell up to $225 million of its common stock through an at-the-market offering program. Alliant Energy has not issued any shares under this program.

Equity Forward Agreements - In 2019, Alliant Energy entered into forward sale agreements with a counterparty in connection with a public offering of 4,275,127 shares of Alliant Energy common stock. In 2020, Alliant Energy settled $222 million under the forward sale agreements by delivering 4,275,127 shares of newly issued Alliant Energy common stock at a weighted average forward sale price of $51.98 per share. Alliant Energy used the net proceeds from the settlements for general corporate purposes.

Shareowner Direct Plan - Alliant Energy satisfies its requirements under the Shareowner Direct Plan (dividend reinvestment and stock purchase plan) by acquiring Alliant Energy common stock through original issue, rather than on the open market.