Market Cap for Southern Company (SO)
According to Southern Company's latest reported financial statements, the company's latest reported market cap is $96.70B USD. 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 .
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Latest period
$96.70B
YoY change
+7.2%
5Y CAGR
+7.3%
Peak year (2026)
$103.70B
Latest annual
$103.70B
Market Cap history chart for Southern Company (SO) from 1985 to 2026
Market Cap history table for Southern Company (SO) from 1985 to 2026
| Fiscal year | Period ended | Reported | Market Cap | YoY |
|---|---|---|---|---|
| 2026 | $103.70B | +7.2% | ||
| 2025 | $96.70B | +6.5% | ||
| 2024 | $90.80B | +17.9% | ||
| 2023 | $76.99B | -0.3% | ||
| 2022 | $77.19B | +6.1% | ||
| 2021 | $72.76B | +12.0% | ||
| 2020 | $64.99B | -3.1% | ||
| 2019 | $67.08B | +47.7% | ||
| 2018 | $45.40B | -6.3% | ||
| 2017 | $48.46B | -0.5% | ||
| 2016 | $48.71B | +14.2% | ||
| 2015 | $42.65B | -4.4% | ||
| 2014 | $44.61B | +22.3% | ||
| 2013 | $36.48B | -1.8% | ||
| 2012 | $37.16B | -6.3% | ||
| 2011 | $39.67B | +24.5% | ||
| 2010 | $31.86B | +20.3% | ||
| 2009 | $26.49B | -7.6% | ||
| 2008 | $28.68B | -2.8% | ||
| 2007 | $29.49B | +7.0% | ||
| 2006 | $27.57B | +6.6% | ||
| 2005 | $25.86B | +3.8% | ||
| 2004 | $24.91B | +12.5% | ||
| 2003 | $22.14B | +9.2% | ||
| 2002 | $20.27B | +15.2% | ||
| 2001 | $17.59B | +32.8% | ||
| 2000 | $13.24B | +34.9% | ||
| 1999 | $9.82B | -20.4% | ||
| 1998 | $12.34B | +14.3% | ||
| 1997 | $10.80B | +16.4% | ||
| 1996 | $9.27B | -7.0% | ||
| 1995 | $9.98B | +25.8% | ||
| 1994 | $7.93B | -7.6% | ||
| 1993 | $8.58B | +30.2% | ||
| 1992 | $6.59B | +13.9% | ||
| 1991 | $5.78B | +33.9% | ||
| 1990 | $4.32B | -9.7% | ||
| 1989 | $4.79B | +13.0% | ||
| 1988 | $4.24B | +7.7% | ||
| 1987 | $3.93B | +6.3% | ||
| 1986 | $3.70B | +23.9% | ||
| 1985 | $2.98B | — |
Market Cap values are taken from Southern Company's reported income statements (10-Q quarterly and 10-K annual filings with the U.S. Securities and Exchange Commission). Each row shows the period end date and the date the filing was reported; YoY compares each figure to the same period one year earlier. Amounts are in USD as filed.
Analysis
Southern Company (SO) most recent annual market cap stands at $103.70B (2026) – grew 7.2% year-over-year.
Southern Company market cap compound annual growth for the 2021–2026 (5 years) window is +7.3%, sustaining 3 straight years of year-over-year growth.
The dataset's maximum market cap sits at $103.70B (2026); the minimum reading of $2.98B dates to 1985.
Among 8 Utilities peers, Southern Company (SO) ranks 3rd; the peer median for market cap is $84.59B.
Southern Company Market Cap by Year
Southern Company Market Cap 2026: $103.70B
Southern Company market cap in 2026 was $103.70B, grew 7.2% from 2025. This figure represents the highest annual value in the available history.
Southern Company Market Cap 2025: $96.70B
Southern Company market cap in 2025 was $96.70B, grew 6.5% from 2024.
Southern Company Market Cap 2024: $90.80B
Southern Company market cap in 2024 was $90.80B, grew 17.9% from 2023.
Southern Company Market Cap 2023: $76.99B
Southern Company market cap in 2023 was $76.99B, edged down 0.3% below 2022.
Southern Company Market Cap 2022: $77.19B
Southern Company market cap in 2022 was $77.19B.
See more financial history for Southern Company (SO).
Sector peers — Market Cap
Companies in the same sector as Southern Company, ranked by their latest market cap.
| Company | Market Cap | Sector |
|---|---|---|
| GE Vernova Inc. (GEV) | $292.62B | Utilities |
| NextEra Energy, Inc. (NEE) | $201.26B | Utilities |
| Duke Energy Corporation (DUK) | $99.46B | Utilities |
| Constellation Energy Corporation (CEG) | $95.47B | Utilities |
| American Electric Power Company, Inc. (AEP) | $73.70B | Utilities |
| Sempra (SRE) | $60.69B | Utilities |
| Dominion Energy, Inc. (D) | $55.28B | Utilities |
| Vistra Corp. (VST) | $54.55B | Utilities |
Frequently asked questions
What is Southern Company's market cap?
- Latest reported market cap for Southern Company (SO) is $96.70B (period ending December 31, 2025).
How has Southern Company market cap changed year-over-year?
- Southern Company (SO) market cap changed +7.2% year-over-year on the latest annual filing.
What is the long-term growth rate of Southern Company market cap?
- Southern Company (SO) market cap compound annual growth rate is +7.3% over the most recent 5 years available.
When did Southern Company market cap hit its highest annual value?
- Southern Company market cap reached its highest annual value of $103.70B in 2026.
What was Southern Company market cap in 2025?
- Southern Company (SO) market cap in 2025 was $96.70B.
What was Southern Company market cap in 2026?
- Southern Company (SO) market cap in 2026 was $103.70B.
Metrics overview
Pick a metric for charts, filings, and peers — each row shows the latest TTM or annual value with year-over-year change.
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SO Overview
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