Alliant Energy Corp.
- LNT · Nasdaq
- Electric & Other Services Combined
- Madison, WI
- 2,948 employees
- CIK 0000352541
Updated from SEC filings through
Top things to know
Executives
- Lisa Barton Alliant Energy President and CEO 8-K, 2026-10-29
-
Lisa M. Barton President and CEO 4, 2026-02-23 -
Robert J. Durian EVP and CFO 4, 2026-08-12 - Antonio P. Smyth Executive Vice President 4, 2026-04-16
- Rebecca C. Valcq Vice President 4/A, 2026-03-19
- Mayuri Farlinger Vice President 4, 2026-02-23
What leadership is saying
“We delivered another solid quarter of operating performance and our full-year earnings expectation has been narrowed to within the top half of the original 2026 ongoing EPS guidance range”
Earnings press release (8-K Ex. 99.1), filed October 29, 2026
Alliant Energy Corp is a U.S. public company in electric & other services combined (SIC 4931), headquartered in Madison, WI. It trades as LNT on Nasdaq. Revenue was $4.4B in the fiscal year ending December 31, 2025, +9.6% from the year before. It reported about 2,948 employees. Lisa Barton is Alliant Energy President and CEO.
Five-year financials
| Metric | FY2025 | FY2024 | FY2023 | FY2022 | FY2021 |
|---|---|---|---|---|---|
| Revenue | $4.4B 10-K, 2026-02-20 | $4.0B 10-K, 2026-02-20 | $4.0B 10-K, 2026-02-20 | $4.2B 10-K, 2025-02-21 | $3.7B 10-K, 2024-02-16 |
| Operating income | $1.0B 10-K, 2026-02-20 | $886M 10-K, 2026-02-20 | $943M 10-K, 2026-02-20 | $928M 10-K, 2025-02-21 | $795M 10-K, 2024-02-16 |
| SG&A | Not on file | Not on file | Not on file | Not on file | Not on file |
| Net income | $810M 10-K, 2026-02-20 | $690M 10-K, 2026-02-20 | $703M 10-K, 2026-02-20 | $686M 10-K, 2025-02-21 | $674M 10-K, 2024-02-16 |
Annual figures from XBRL in each company's own filings. Click a figure to open the filing. SG&A marked derived is general and administrative plus selling and marketing.
Leadership and board
| Name | Title | Source |
|---|---|---|
| Lisa Barton | Alliant Energy President and CEO | 8-K, 2026-10-29 |
| Lisa M. Barton President and Chief Executive Officer at Alliant Energy | President and CEO | 4, 2026-02-23 |
| Robert J. Durian Executive Vice President and Chief Financial Officer at Alliant Energy | EVP and CFO | 4, 2026-08-12 |
| Antonio P. Smyth Executive Vice President at Alliant Energy | Executive Vice President | 4, 2026-04-16 |
| Rebecca C. Valcq | Vice President | 4/A, 2026-03-19 |
| Mayuri Farlinger President, Interstate Power & Light Company and Vice President Energy Delivery, Alliant Energy | Vice President | 4, 2026-02-23 |
| Raja Sundararajan EVP Chief Strategy Officer | Executive Vice President | 4, 2026-02-23 |
| Leon David A. de | Senior Vice President | 4, 2026-02-23 |
| Dylan Syse Chief Accounting Officer and Controller at Alliant Energy | CAO and Controller | 4, 2026-02-23 |
| Ignacio Cortina | Board member (per proxy) bio: Director | DEF 14A, 2026-03-31 |
| Manu Asthana | Board member (per proxy) bio: Director | DEF 14A, 2026-03-31 |
| Patrick Allen | Board member (per proxy) bio: Independent Board Chair | DEF 14A, 2026-03-31 |
What Alliant Energy Corp does
Alliant Energy maintains its principal executive offices in Madison, Wisconsin. Alliant Energy operates as a regulated investor-owned public utility holding company, and its purpose-driven strategy is to serve its customers and build stronger communities. Alliant Energy’s primary focus is to provide regulated electric and natural gas service to approximately 1,010,000 electric and approximately 435,000 natural gas customers in the Midwest through its two public utility subsidiaries, IPL and WPL.
Item 1. Business, 10-K for the year ending December 31, 2025
Shares and governance
| Shares outstanding | 258.3 million (as of March 31, 2026) | 10-Q, May 1, 2026 |
|---|---|---|
| Public float | $15.5B (as of June 30, 2025) | 10-K, February 20, 2026 |
| Reportable segments | 2 (period ending March 31, 2026) | 10-Q, May 1, 2026 |
| Latest proxy statement | Meeting May 20, 2026 (filed March 31, 2026) | DEF 14A, March 31, 2026 |
| Auditor | Deloitte & Touche LLP (Milwaukee, Wisconsin) | Latest 10-K |
Insider trades
Open-market buys and sales by officers and directors, from Forms 4 and 5. One row per filing.
| Date | Insider | Trade | Shares | Value | Source |
|---|---|---|---|---|---|
| August 10, 2026 | Robert J. Durian EVP and CFO | Sale | 0 | $6.86 | Form 4, August 12, 2026 |
Recent 8-K events
- 8-K filed 2026-10-30
- Item 2.02 Results of operations and financial condition (earnings release)
- 8-K filed 2026-10-28
- Item 1.01 Entry into a material definitive agreement
- Item 2.03 Creation of a direct financial obligation
- 8-K filed 2026-08-21
- Item 8.01 Other events
- 8-K filed 2026-07-31
- Item 2.02 Results of operations and financial condition (earnings release)
- 8-K filed 2026-05-21
- Item 5.07 Submission of matters to a vote of security holders
- 8-K filed 2026-05-01
- Item 2.02 Results of operations and financial condition (earnings release)
- 8-K filed 2026-03-19
- Item 1.01 Entry into a material definitive agreement
- 8-K filed 2026-03-04
- Item 1.01 Entry into a material definitive agreement
- Item 2.03 Creation of a direct financial obligation
- 8-K filed 2026-02-20
- Item 2.02 Results of operations and financial condition (earnings release)
- 8-K filed 2026-01-08
- Item 5.02 Departure or appointment of directors or officers; compensation
Frequently asked questions about Alliant Energy Corp
- What does Alliant Energy Corp do?
- In its own words, from Item 1 of its 10-K: "Alliant Energy maintains its principal executive offices in Madison, Wisconsin. Alliant Energy operates as a regulated investor-owned public utility holding company, and its purpose-driven strategy is to serve its customers and build stronger communities. Alliant Energy’s primary focus is to provide regulated electric and natural gas service to approximately 1,010,000 electric and approximately 435,000 natural gas customers in the Midwest through its two public utility subsidiaries, IPL and WPL."
- What is Alliant Energy Corp's revenue?
- $4.4B for the fiscal year ending December 31, 2025, from its 10-K filed February 20, 2026.
- Is Alliant Energy Corp profitable?
- Alliant Energy Corp reported net income of $810M for the fiscal year ending December 31, 2025.
- How many employees does Alliant Energy Corp have?
- About 2,948 as of December 31, 2025, as stated in its annual report.
- Who is the CEO of Alliant Energy Corp?
- Lisa Barton, Alliant Energy President and CEO, as named in a 8-K filed October 29, 2026.
- Who is the CFO of Alliant Energy Corp?
- Robert J. Durian, EVP and CFO, as named in a 4 filed August 12, 2026.
- Where is Alliant Energy Corp headquartered?
- Madison, WI.
- What is Alliant Energy Corp's stock ticker?
- LNT on Nasdaq.
- What industry is Alliant Energy Corp in?
- Electric & Other Services Combined, SIC code 4931.
- What is Alliant Energy Corp's website?
- alliantenergy.com.
- When does Alliant Energy Corp report earnings next?
- January 29, 2027. Source: estimate_8k_pattern.
- Is Alliant Energy Corp a public company?
- Yes. Alliant Energy Corp files with the SEC under CIK 0000352541 and trades as LNT.
- Who audits Alliant Energy Corp?
- Deloitte & Touche LLP, Milwaukee, Wisconsin, as named in its latest annual report (10-K).
- How many shares of Alliant Energy Corp are outstanding?
- 258.3 million shares as of March 31, 2026, from its 10-Q filed May 1, 2026.
- What is Alliant Energy Corp's public float?
- $15.5B as of June 30, 2025, as reported on the cover of its 10-K filed February 20, 2026.
- How many business segments does Alliant Energy Corp report?
- 2 reportable segments for the period ending March 31, 2026, from its 10-Q filed May 1, 2026.
- When is Alliant Energy Corp's annual shareholder meeting?
- May 20, 2026, per its proxy statement (DEF 14A) filed March 31, 2026.
- Have Alliant Energy Corp insiders traded stock recently?
- Since August 10, 2026, officers and directors reported 1 open-market sale worth about $6.86 and 0 purchases on Forms 4 and 5. The most recent: Robert J. Durian (EVP and CFO) sold 0 shares on August 10, 2026.