Current
$18.6B
5-Year Average
$15B
All-Time High
$20.2B
All-Time Low
$1.31B
Market cap daily chart for Alliant Energy (LNT)
Aug 2, 2021 – Jul 29, 2026 · 1,253 trading days
Market Cap growth chart for Alliant Energy (LNT) from 2017 to 2026
Latest: +11.2%
Market Cap history table for Alliant Energy (LNT) from 1985 to 2026
| 2026 | $18.6B | +11.2% | +$1.87B | ||
| 2025 | $16.8B | +10.4% | +$1.57B | ||
| 2024 | $15.2B | +16.9% | +$2.19B | ||
| 2023 | $13B | -6.3% | -$874M | ||
| 2022 | $13.9B | -10.0% | -$1.54B | ||
| 2021 | $15.4B | +20.2% | +$2.6B | ||
| 2020 | $12.8B | -2.0% | -$263M | ||
| 2019 | $13.1B | +32.5% | +$3.21B | ||
| 2018 | $9.87B | +0.8% | +$82.1M | ||
| 2017 | $9.79B | +13.7% | +$1.18B | ||
| 2016 | $8.6B | +22.2% | +$1.57B | ||
| 2015 | $7.04B | -4.3% | -$320M | ||
| 2014 | $7.36B | +28.7% | +$1.64B | ||
| 2013 | $5.72B | +17.5% | +$852M | ||
| 2012 | $4.86B | -0.4% | -$19.2M | ||
| 2011 | $4.88B | +20.2% | +$819M | ||
| 2010 | $4.06B | +21.7% | +$726M | ||
| 2009 | $3.34B | +3.7% | +$120M | ||
| 2008 | $3.22B | -29.7% | -$1.36B | ||
| 2007 | $4.58B | +3.4% | +$152M | ||
| 2006 | $4.43B | +35.2% | +$1.15B | ||
| 2005 | $3.27B | +0.7% | +$23M | ||
| 2004 | $3.25B | +28.8% | +$727M | ||
| 2003 | $2.52B | +68.3% | +$1.02B | ||
| 2002 | $1.5B | -38.6% | -$945M | ||
| 2001 | $2.45B | -3.2% | -$81.4M | ||
| 2000 | $2.53B | +17.3% | +$373M | ||
| 1999 | $2.15B | -13.2% | -$327M | ||
| 1998 | $2.48B | +142.5% | +$1.46B | ||
| 1997 | $1.02B | +18.3% | +$158M | ||
| 1996 | $865M | -8.2% | -$77.4M | ||
| 1995 | $942M | +12.4% | +$104M | ||
| 1994 | $838M | -13.9% | -$136M | ||
| 1993 | $974M | +6.4% | +$58.7M | ||
| 1992 | $915M | +4.6% | +$40.3M | ||
| 1991 | $875M | +33.8% | +$221M | ||
| 1990 | $654M | +0.5% | +$3.15M | ||
| 1989 | $651M | +6.5% | +$39.7M | ||
| 1988 | $611M | +6.2% | +$35.5M | ||
| 1987 | $575M | -13.1% | -$87M | ||
| 1986 | $662M | +24.2% | +$129M | ||
| 1985 | $533M | — | — |
- 2026$18.6B+11.2%
- 2025$16.8B+10.4%
- 2024$15.2B+16.9%
- 2023$13B-6.3%
- 2022$13.9B-10.0%
- 2021$15.4B+20.2%
- 2020$12.8B-2.0%
- 2019$13.1B+32.5%
- 2018$9.87B+0.8%
- 2017$9.79B+13.7%
- 2016$8.6B+22.2%
- 2015$7.04B-4.3%
- 2014$7.36B+28.7%
- 2013$5.72B+17.5%
- 2012$4.86B-0.4%
- 2011$4.88B+20.2%
- 2010$4.06B+21.7%
- 2009$3.34B+3.7%
- 2008$3.22B-29.7%
- 2007$4.58B+3.4%
- 2006$4.43B+35.2%
- 2005$3.27B+0.7%
- 2004$3.25B+28.8%
- 2003$2.52B+68.3%
- 2002$1.5B-38.6%
- 2001$2.45B-3.2%
- 2000$2.53B+17.3%
- 1999$2.15B-13.2%
- 1998$2.48B+142.5%
- 1997$1.02B+18.3%
- 1996$865M-8.2%
- 1995$942M+12.4%
- 1994$838M-13.9%
- 1993$974M+6.4%
- 1992$915M+4.6%
- 1991$875M+33.8%
- 1990$654M+0.5%
- 1989$651M+6.5%
- 1988$611M+6.2%
- 1987$575M-13.1%
- 1986$662M+24.2%
- 1985$533M—
Market Cap values are taken from Alliant Energy's reported income statements (share counts) and end-of-day prices (quarterly 10-Q and annual 10-K filings with the U.S. Securities and Exchange Commission). Each row shows the period end date and the filing date. YoY compares each figure to the same period one year earlier. Amounts are in USD as filed.
About Market Cap at Alliant Energy (LNT)
According to Alliant Energy's latest reported financial statements, the company's latest reported market cap is $18.6B. Market capitalization is the total dollar value of all outstanding shares — shares outstanding × stock price — and the standard measure of a company's equity value. On this page, historical market cap snaps filing-period share counts to closing prices on or before each statement date (not intraday tick data).
Headline figure above is from the reporting period ending (reported ). Chart and table below cover the full reported history back to .
Alliant Energy (LNT) most recent annual market cap stands at $18.6B (2026) – grew 11.2% year-over-year.
Alliant Energy market cap compound annual growth for the 2021–2026 (5 years) window is +3.9%, sustaining 3 straight years of year-over-year growth.
$18.6B stands as the all-time-high annual market cap, posted in 2026, against a low of $533M during 1985.
Alliant Energy Market Cap by Year
Alliant Energy Market Cap 2026: $18.6B
Alliant Energy market cap in 2026 was $18.6B, grew 11.2% from 2025. This figure represents the highest annual value in the available history.
Alliant Energy Market Cap 2025: $16.8B
2025's market cap for Alliant Energy came in at $16.8B, grew 10.4% from 2024.
Alliant Energy Market Cap 2024: $15.2B
Alliant Energy posted market cap of $15.2B in 2024, grew 16.9% from 2023.
Alliant Energy Market Cap 2023: $13B
In 2023, Alliant Energy reported market cap of $13B, declined 6.3% below 2022.
Alliant Energy Market Cap 2022: $13.9B
Alliant Energy market cap in 2022 was $13.9B.
See more financial history for Alliant Energy (LNT).
Sector peers by Market Cap
Utilities peers of Alliant Energy (LNT), ranked by their latest market cap
| $240B | |
| $184B | |
| $108B | |
| $101B | |
| $92.6B | |
| $70.4B | |
| $62B | |
| $58.1B |
- $240B
- $184B
- $101B
- $58.1B
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Alliant Energy (LNT) Key Financials
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How this company returns cash to shareholders — buybacks, dividends, and stock splits.