Alliant Energy Corp

LNT

UtilitiesNMS$17.9B

LNT SEC filings last scanned 13 May 2026, 23:25 UTC

CEO Timeline

Lisa M. BartonCurrent

Jan 2024 — Present(2y 4mo)

Lisa M. Barton was appointed President and Chief Executive Officer of Alliant Energy Corporation, effective January 1, 2024, succeeding John O. Larsen who transitioned to Executive Chairman.

2 source filings — click to expand

John O. LarsenManually reviewed

Jul 2019 — Jan 2024(4y 6mo)

John O. Larsen was appointed President and Chief Executive Officer of Alliant Energy Corporation, effective July 1, 2019, succeeding Patricia L. Kampling.

John O. Larsen resigned as Chief Executive Officer of Alliant Energy Corporation, effective January 1, 2024, and was elected Executive Chairman.

3 source filings — click to expand

Patricia L. Kampling

Apr 2012 — Jul 2019(7y 3mo)

Patricia L. Kampling was appointed President and Chief Executive Officer of Alliant Energy Corporation, succeeding William D. Harvey, effective April 1, 2012.

planned retirement

3 source filings — click to expand

William D. Harvey

Jul 2005 — Mar 2012(6y 8mo)

William D. Harvey was appointed Chief Executive Officer of Alliant Energy Corporation, effective July 1, 2005, succeeding Erroll B. Davis, Jr.

planned retirement

3 source filings — click to expand

Erroll B. Davis, Jr.

Apr 1998 — Jul 2005(7y 3mo)

planned retirement

1 source filing — click to expand