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Southern Co

SONYSEElectric ServicesFiscal year ends December 31Also trades as SOJC, SOJD, SOJE, SOJF, SOMN
Financials through Q2 FY2026, quarter ended Jun 30, 2026Last filing: 10-Q on Jul 30, 2026Score 6/3012% above fair value
$94.61+0.90 (+0.96%)

Close on Nov 2, 2026Market cap $107.95BP/E 22.9Yield 3.11%

Southern Traditional Electric Operating Companies System by Year

Traditional Electric Operating Companies System Reserve Margin (%) (%)

Southern Traditional Electric Operating Companies System: 20.0% in FY2025, up 4.0 pts from a year earlier.

Latest, FY2025
20.0%
Period ended Dec 31, 2025
Change on a year earlier
+4.0 pts
16.0% in FY2024
History
11 years
Since FY2015
Sources
8
Documents cited below

Where the FY2025 figure comes from

Source: Southern Company 10-K (10k_2025, filed 2026-02-19, 0000092122-26-000006) ↗

Reported in Form 10-K Item 1, Item 2 & Item 6 — Utility Customers & System Peak Load.

Annual history

Hover a value to see the sentence it was read from; calculated values show their formula

PeriodEndedTraditional Electric Operating Companies System Reserve Margin (%) (%)Year on yearSource
FY2025Dec 31, 202520.0%+4.0 ptsSouthern Company 10-K (10k_2025, filed 2026-02-19, 0000092122-26-000006) ↗
FY2024Dec 31, 202416.0%-3.0 ptsSouthern Company 10-K (10k_2024, filed 2025-02-20, 0000092122-25-000018) ↗
FY2023Dec 31, 202319.0%-1.0 ptsSouthern Company 10-K (10k_2023, filed 2024-02-15, 0000092122-24-000009) ↗
FY2022Dec 31, 202220.0%-16.0 ptsSouthern Company 10-K (10k_2022, filed 2023-02-16, 0000092122-23-000012) ↗
FY2021Dec 31, 202136.0%+3.4 ptsSouthern Company 10-K (10k_2021, filed 2022-02-17, 0000092122-22-000003) ↗
FY2020Dec 31, 202032.6%+4.5 ptsSouthern Company 10-K (10k_2020, filed 2021-02-18, 0000092122-21-000006) ↗
FY2019Dec 31, 201928.1%-1.7 ptsSouthern Company 10-K (10k_2019, filed 2020-02-20, 0000092122-20-000017) ↗
FY2018Dec 31, 201829.8%-1.0 ptsSouthern Company 10-K (10k_2018, filed 2019-02-20, 0000092122-19-000006) ↗
FY2017Dec 31, 201730.8%-3.4 ptsSouthern Company 10-K (10k_2019, filed 2020-02-20, 0000092122-20-000017) ↗
FY2016Dec 31, 201634.2%+1.0 ptsSouthern Company 10-K (10k_2019, filed 2020-02-20, 0000092122-20-000017) ↗
FY2015Dec 31, 201533.2%–Southern Company 10-K (10k_2019, filed 2020-02-20, 0000092122-20-000017) ↗

Cite this data

StockData. (2026). Southern Traditional Electric Operating Companies System (%), annual FY2015–FY2025 [Data set]. Compiled from Southern SEC filings and investor materials. https://stockdatahq.com/stocks/so/kpis/k10-reserve-margin-pct

See every metric in the Southern KPI table. Data updated Nov 2, 2026.