SO at a glance
Southern Company (SO, SEC CIK 92122) filed its latest 10-K annual report on February 19, 2026, a 10-Q quarterly report on July 30, 2026, an 8-K current report on August 6, 2026 and Form 4 insider filings as recently as October 5, 2026. SignalX summarizes each filing with AI and tracks the company's insider trades and institutional holders.
- For the fiscal year ended December 31, 2025 (FY2025), Southern Company (SO) reported revenue of $29.6 billion (up 10.6% from FY2024) and net income of $4.3 billion. Diluted EPS was $3.92.
- As of June 30, 2026, 60 institutional investment managers tracked by SignalX reported holding Southern Company (SO) shares worth $44.7 billion in 13F-HR filings.
- The most recent insider open-market sale reported on Form 4 was by Kim Matthew M. on October 1, 2026 of 100 shares at $82.73 per share.
- In the last 90 days, SO insiders reported 0 open-market purchases ($0) and 6 open-market sales ($842K) on Form 4, a net sale of $842K.
Source: SEC EDGAR (XBRL financial data, 13F-HR and Form 4 filings).
- Revenue · FY2025
- $29.6B
- +10.6% vs prior year
- Insiders · 90 days
- 0 buys · 6 sells
- Net −$842K
- 13F holders
- 60 funds
- $44.7B · −1 vs prior quarter
- Latest 8-K
- Aug 6, 2026
- Item 2.03
AI 10-K Annual Report Analysis
Latest 10-K, fiscal year ended Dec 31, 2025
Business Overview
- Core business model: Vertically integrated electric utilities serving Southeastern U.S. with wholesale and retail power plus natural gas distribution in four states
- New emphasis on battery energy storage projects within Southern Power's power generation portfolio
- Strategic integration of distributed energy and resilience solutions via PowerSecure, enhancing microgrid deployment capabilities
- Employee-related services centralized under SCS, supporting executive, engineering, IT, finance, and operations across subsidiaries
- Southern Linc digital wireless system coverage expanded to 122,000 square miles in the Southeast, supporting both company and public communications
Risk Factors
- Regulatory risk: Alabama PSC approved retail rates stable through 2027, potential cost recovery limitations from 2028 onward
- Macroeconomic threat: Rising infrastructure costs and capital expenditures pressure profitability of electric and gas utilities
- Operational risk: Reliance on state regulators for cost recovery and rate of return approval affecting cash flow certainty
- Competitive risk: Reduced government incentives or regulations for renewables may depress demand for renewable energy projects
- Legal risk: Exposure to substantial monetary penalties for noncompliance with electric infrastructure protection and pipeline safety regulations
Management Discussion & Analysis
- Risk of under recovery of costs $880M storm damage recovery deferred for Hurricane Helene restoration at Georgia Power
- Best performing segment not specified; risk highlighted from traditional electric and Southern Company Gas operations exposed to fuel price volatility and recovery delays
- Capital allocation details not provided; storm costs $75M capitalized, $780M deferred as regulatory asset, $25M deferred for transmission customers
- Forward-looking risk: volatile natural gas prices mid- to high-$3 per mmBtu through 2030, weather volatility, economic downturns, technology adoption uncertainties impacting demand
AI summary of the SO 10-K filed . Generated from the filing text; verify against the original.View on SEC EDGARHow to read a 10-K
AI 10-Q Quarterly Report Analysis
Latest 10-Q, quarter ended Jun 30, 2026
Management Discussion & Analysis
- Reportable segments: traditional electric operations, Southern Power, Southern Company Gas
Risk Factors
- No risk-factors section provided; supplied text begins with Item 5, Other Information
- Insider trading arrangement: Peter P. Sena III adopted a Rule 10b5-1 plan covering 4,266 shares
- Debt exposure: Georgia Power issued 2026A floating-rate notes due November 22, 2027
- Refinancing risk: Georgia Power issued 4.60% senior notes due June 15, 2029
- Long-dated funding: Southern Company Gas issued 6.05% junior subordinated notes due September 15, 2056
AI summary of the SO 10-Q filed . Generated from the filing text; verify against the original.View on SEC EDGAR10-K vs 10-Q vs 8-K
AI 8-K Current Report Analysis
The most recent material events, by 8-K item
Item 2.03: Creation of a Direct Financial Obligation
- Convertible notes privately placed under Section 4(a)(2) and Rule 144A, limiting initial resale to qualified institutional buyers
- Series 2026A conversion potential: up to 8,970,816 common shares
Item 8.01: Other Events
- $2.375B convertible notes priced: $725M Series 2026A at 2.125% due 2027 and $1.65B Series 2026B at 3.50% due 2029
- Offering upsized by $225M from previously announced amounts, signaling stronger financing demand
Item EX-99.1: Item EX-99.1
- $2.375B convertible debt priced, including $725M Series 2026A at 2.125% and $1.65B Series 2026B at 3.50%
- Upsized offering signals strong institutional demand but increases Southern’s debt obligations
Item 8.01: Other Events
- Proposed private offerings of $650 million 2027 convertible notes and $1.5 billion 2029 convertible notes
- Potential overallotment options for an additional $97.5 million 2027 notes and $225 million 2029 notes
Item EX-99.1: Item EX-99.1
- $2.15B convertible-note offering: $650M due December 15, 2027 and $1.5B due September 15, 2029
- Additional purchase options up to $322.5M, potentially increasing total issuance to $2.4725B
AI summaries of SO 8-K current reports filed with the SEC. What 8-K item codes mean
SignalX for SO
Don't miss the next SO filing
- Alerts as it files. A push when SO files an 8-K or an insider trades.
- Fund moves. Which tracked funds opened, added or cut SO, by share count.
- Ask anything. An AI agent that reads every SO filing and answers with sources.
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Recent Insider Transactions (Form 4)
Latest reported trades by officers, directors and 10% owners
| Insider | Type | Date | Shares | Price |
|---|---|---|---|---|
| MEADOR DAVID E | A | Oct 1, 2026 | 913.502 | $83.47 |
| Etheredge James O | A | Oct 1, 2026 | 539.116 | $83.47 |
| GRAIN DAVID J | A | Oct 1, 2026 | 973.404 | $83.47 |
| Svinicki Kristine L | A | Oct 1, 2026 | 539.116 | $83.47 |
| Akella Janaki | A | Oct 1, 2026 | 539.116 | $83.47 |
| Cooper Shantella E. | A | Oct 1, 2026 | 539.116 | $83.47 |
| Kim Matthew M. | Sell | Oct 1, 2026 | 100 | $82.73 |
| JOHNS JOHN D | A | Oct 1, 2026 | 539.116 | $83.47 |
Financial SummaryXBRL
| Metric | FY2023 | FY2024 | FY2025 |
|---|---|---|---|
| Profitability | |||
| Revenue | - | $26.7B | $29.6B |
| Operating Income | - | $7.1B | $7.3B |
| Net Income | $4.0B | $4.4B | $4.3B |
| Op. Margin | - | 26.4% | 24.7% |
| Net Margin | - | 16.5% | 14.7% |
| Balance Sheet | |||
| Total Assets | $139.3B | $145.2B | $155.7B |
| Equity | - | $33.2B | $36.0B |
| ROE | - | 13.3% | 12.1% |
| Per Share | |||
| EPS | $3.62 | $3.99 | $3.92 |
| Cash Flow | |||
| Operating CF | - | $9.8B | $9.8B |
| CapEx | $9.1B | $9.0B | $12.7B |
Source: XBRL data in Southern Company (SO)'s 10-K filings on SEC EDGAR, in USD. Compare across companies →
13F Fund Holdings: Quarterly Trend
Latest: Q2 2026Aggregate SO share value held by 13F filers tracked by SignalX, by quarter.
Quarterly totals table
| Quarter | Funds | Total value |
|---|---|---|
| Q2 2026 | 60 | $44.73B |
| Q1 2026 | 61 | $43.67B |
| Q4 2025 | 56 | $39.92B |
| Q3 2025 | 59 | $51.42B |
| Q2 2025 | 54 | $42.32B |
| Q1 2025 | 53 | $32.43B |
| Q4 2024 | 51 | $21.07B |
| Q3 2024 | 44 | $10.90B |
- T. Rowe Price Group+9.99M (+27%)
- Goldman Sachs Group+8.74M (+150%)
- BlackRock+2.62M (+3%)
- Vanguard Capital Management LLC+2.13M (+3%)
- State Street Corp+1.83M (+3%)
- JPMorgan Chase & Co−10.56M (-24%)
- Prudential Financial−981.0K (-62%)
- FMR LLC (Fidelity)−350.7K (-2%)
- Franklin Resources−247.4K (-1%)
- HANCOCK WHITNEY CORP−229.7K (-89%)
Source: 13F-HR filings on SEC EDGAR (aggregated from 438 fund-quarter rows). Reflects only 13F filers tracked by SignalX, not the full institutional ownership universe. How 13F filings work
SO filing archive
AI analysis pages for each 10-K, 10-Q and 8-K
10-K annual reports
10-Q quarterly reports
Latest 2026 SEC Filings: 10-K, 10-Q, 8-K & Form 4
| Form | Filing date | Period | Analysis | SEC |
|---|---|---|---|---|
| 4 | Oct 5, 2026 | - | - | - |
| 4 | Oct 5, 2026 | - | - | - |
| 4 | Oct 5, 2026 | - | - | - |
| 4 | Oct 5, 2026 | - | - | - |
| 4 | Oct 5, 2026 | - | - | - |
| 4 | Oct 5, 2026 | - | - | - |
| 4 | Oct 5, 2026 | - | - | - |
| 4 | Oct 5, 2026 | - | - | - |
| 4 | Oct 5, 2026 | - | - | - |
| 4 | Oct 5, 2026 | - | - | - |
| 4 | Oct 5, 2026 | - | - | - |
| 4 | Oct 1, 2026 | - | - | - |
| 4 | Sep 4, 2026 | - | - | - |
| 4 | Sep 4, 2026 | - | - | - |
| 4 | Sep 3, 2026 | - | - | - |
| 4 | Aug 7, 2026 | - | - | - |
| 8-K | Aug 6, 2026 | - | Analysis | - |
| 8-K | Aug 4, 2026 | - | Analysis | - |
| 4 | Aug 4, 2026 | - | - | - |
| 8-K | Aug 3, 2026 | - | Analysis | - |
| 10-Q | Jul 30, 2026 | Jun 30, 2026 | Analysis | |
| 8-K | Jul 30, 2026 | - | Analysis | - |
| 4 | Jul 2, 2026 | - | - | - |
| 4 | Jul 2, 2026 | - | - | - |
| 4 | Jul 2, 2026 | - | - | - |
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SO SEC filings: frequently asked questions
Are SO insiders buying or selling?
In the last 90 days, Southern Company (SO) officers, directors and 10% owners reported no open-market purchases and 6 open-market sales worth $842,258 by 3 insiders on Form 4. Many insider sales are pre-planned or for taxes, so purchases usually carry more information.
Which institutions hold SO stock?
As of June 30, 2026, the largest Southern Company (SO) holders among the 13F filers tracked by SignalX were BlackRock ($8.9 billion), Vanguard Capital Management LLC ($7.1 billion), State Street Corp ($6.2 billion), T. Rowe Price Group ($4.4 billion), JPMorgan Chase & Co ($3.2 billion). 13F-HR reports are filed up to 45 days after each quarter ends.
What was SO's revenue in fiscal year 2025?
For the fiscal year ended December 31, 2025 (FY2025), Southern Company (SO) reported revenue of $29.6 billion (up 10.6% from FY2024) and net income of $4.3 billion. Diluted EPS was $3.92. The figures come from the XBRL data in the 10-K.
What are the main risks in SO's latest 10-K?
In the 10-K filed February 19, 2026, Southern Company (SO) flagged: Regulatory risk: Alabama PSC approved retail rates stable through 2027, potential cost recovery limitations from 2028 onward. Macroeconomic threat: Rising infrastructure costs and capital expenditures pressure profitability of electric and gas utilities. (AI summary of the Risk Factors section.)
What did SO report in its latest 8-K?
Southern Company (SO) filed an 8-K on August 6, 2026 reporting Item 2.03 (Creation of a Direct Financial Obligation). Convertible notes privately placed under Section 4(a)(2) and Rule 144A, limiting initial resale to qualified institutional buyers.
What are the latest SO SEC filings?
Southern Company (SO) filed its latest 10-K annual report on February 19, 2026, a 10-Q quarterly report on July 30, 2026, an 8-K current report on August 6, 2026 and a Form 4 insider filing on October 5, 2026.
What is SO's SEC CIK number?
Southern Company (SO)'s SEC Central Index Key (CIK) is 92122. EDGAR lists every SO filing under that number.
Ask anything about SO
The research agent reads SO's filings, financials, insider trades and 13F holders, then answers with sources.