MADISON, Wis. (Dec. 16, 2025) – Alliant Energy (NASDAQ: LNT) announced today that David de Leon, President of Alliant Energy’s Wisconsin energy company, will retire from the company effective July 1, 2026.
“David’s 39 years of service are a true reflection of his dedication to our customers, communities and employees across Iowa and Wisconsin,” said Lisa Barton, President and CEO of Alliant Energy. “Throughout his career, he championed safety, reliability and community partnership, leading with integrity, care and a deep commitment to serving others. We are grateful for his leadership and the positive, lasting impact he has had on our employees and the customers who depend on us every day. On behalf of the board of directors we extend our heartfelt gratitude and wish him the very best in his well-earned retirement.”
As part of the planned transition, Becky Valcq has been appointed to succeed de Leon as President of Alliant Energy’s Wisconsin energy company and to serve as Vice President of Energy Delivery, effective January 5, 2026.
Valcq joined Alliant Energy in 2024 as Assistant Vice President of Regulatory Affairs. Most recently, she served as Assistant Vice President of Regulatory Affairs and Data Center Services. Prior to joining Alliant Energy, Valcq served as Chair of the Public Service Commission of Wisconsin and led the State of Wisconsin’s Energy Office, Broadband Office and Office of Energy Innovation.
“We have full confidence in Becky as she steps into this key leadership role,” said Barton. “Becky is a highly respected leader with a distinguished record of service to the people of Wisconsin, and I look forward to seeing her continue championing the needs of our customers and the communities we serve. Her deep experience, strategic perspective and unwavering commitment to our values make her uniquely equipped to lead during this pivotal period. As Alliant Energy advances significant growth across our communities, Becky’s solutions-oriented, people-centered leadership will be essential to meeting today’s energy needs while building a stronger, more reliable energy future for all.”
As President of Alliant Energy’s Wisconsin energy company, Valcq will have overall accountability for the company’s performance in the state. She will oversee Wisconsin-based operations while supporting customer growth. She will also lead operations support and economic development efforts across both Iowa and Wisconsin.
Valcq serves on the Board of Directors for the Wisconsin Public Utility Institute, the National Utilities Diversity Council and the United Way of Greater Milwaukee and Waukesha County. She earned a Bachelor of Arts in political science and Spanish from Drake University and a Juris Doctor from Marquette University Law School.
A complete list of company executives and their biographies is available at alliantenergy.com/executives.
Media Contact: Cindy Tomlinson | 608-458-3869 | cindytomlinson@alliantenergy.com
About Alliant Energy
Alliant Energy Corporation (NASDAQ: LNT) provides regulated energy service to approximately 1 million electric and 430,000 natural gas customers across Iowa and Wisconsin. Alliant Energy’s mission is to deliver energy solutions and exceptional service customers and communities count on – safely, efficiently and responsibly. Interstate Power and Light Company (IPL) and Wisconsin Power and Light Company (WPL) are Alliant Energy’s two public energy companies. For more information, visit alliantenergy.com and follow Alliant Energy on LinkedIn, Facebook, Instagram and X.
Home PRESS RELEASES Alliant Energy: President of Wisconsin utility business, David de Leon, announces retirement;...
