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Green bonds

Green bonds' proceeds are used for environmentally-beneficial projects. We are using green bonds to finance affordable renewable energy projects for our customers.

Our energy vision


We are dedicated to delivering reliable energy to homes and businesses today, while preparing for the increasing energy demands of future generations. Through our Energy Blueprint, we are focused on responsibly powering growth by modernizing our infrastructure and advancing a balanced resource portfolio. With flexibility built into our carefully paced strategy, we're ready to adapt to changing conditions while prioritizing affordability, safety, reliability, and sustainability. Our voluntary environmental stewardship goals reflect our company’s dynamic role and support to advance the transition toward a low-carbon economy.

Green bond issuances for renewable projects

  • In March 2024, Alliant Energy’s Wisconsin energy company, WPL, completed the issuance of $300 million 5.375% green bonds due 2034. We invested an amount equal to or in excess of the net proceeds from the sale of these bonds for solar generation projects owned and operated by WPL.
  • In March 2023, Alliant Energy’s Wisconsin energy company, WPL, completed the issuance of $300 million 4.95% green bonds due 2033. We invested an amount equal to or in excess of the net proceeds from the sale of these bonds for solar generation projects owned and operated by WPL.
  • In August 2022, Alliant Energy’s Wisconsin energy company, WPL, completed the issuance of $600 million 3.95% green bonds due 2032. We invested an amount equal to or in excess of the net proceeds from the sale of these bonds for solar generation projects owned and operated by WPL.
  • In September 2021, Alliant Energy’s Wisconsin energy company, Wisconsin Power and Light Company (WPL), completed the issuance of $300 million 1.95% green bonds due 2031. We invested an amount in excess of the net proceeds from the sale of these bonds for wind and solar generation projects owned and operated by WPL.
  • In September 2019, Alliant Energy’s Iowa energy company, IPL, completed the issuance of $300 million 3.50% green bonds due 2049. We invested an amount in excess of the net proceeds from the sale of these bonds for wind generation projects owned and operated by IPL.
  • In April 2019, Alliant Energy’s Iowa energy company, IPL, completed the issuance of $300 million 3.60% green bonds due 2029. We invested an amount in excess of the net proceeds from the sale of these bonds for wind generation projects owned and operated by IPL.
  • In September 2018, Alliant Energy’s Iowa energy company, Interstate Power and Light Company (IPL), completed the issuance of $500 million 4.10% green bonds due 2028. We invested an amount in excess of the net proceeds from the sale of these bonds for wind and solar generation projects owned and operated by IPL.

To explore the projects these green bonds will finance, please visit our wind and solar pages.

2024 Performance Data [PDF]
$500 million green bond
Maturing 2028
$300 million green bond
Maturing 2029
$300 million green bond
Maturing 2031
$600 million green bond
Maturing 2032
$300 million green bond
Maturing 2033
$300 million green bond
Maturing 2034
$300 million green bond
Maturing 2049

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