# EDGAR Filing Document

**Accession Number:** 0001160661
**File Stem:** 9999999995-25-002541
**Filing Date:** 2025-8
**Character Count:** 1196
**Document Hash:** 1bc5d9561601c7b574d034e246e22528
**Contains OCR:** False
**Source Format:** 

## Filing Content

## Filing Summary
**9999999995-25-002541.hdr.sgml**: 20250811

**ACCESSION NUMBER**: 9999999995-25-002541

**CONFORMED SUBMISSION TYPE**: EFFECT

**PUBLIC DOCUMENT COUNT**: 1

**FILED AS OF DATE**: 20250808

**DATE AS OF CHANGE**: 20250811

**EFFECTIVENESS DATE**: 20250808

**FILER**: 

**COMPANY DATA:**
- **COMPANY CONFORMED NAME:** SOUTHERN POWER CO
- **CENTRAL INDEX KEY:** 0001160661
- **STANDARD INDUSTRIAL CLASSIFICATION:** ELECTRIC SERVICES [4911]
- **ORGANIZATION NAME:** 01 Energy & Transportation
- **EIN:** 582598670

**FILING VALUES:**
- **FORM TYPE:** EFFECT
- **SEC ACT:** 1933 Act
- **SEC FILE NUMBER:** 333-289172
- **FILM NUMBER:** 251199964

**BUSINESS ADDRESS:**
- **STREET 1:** 30 IVAN ALLEN JR. BLVD
- **CITY:** ATLANTA
- **STATE:** GA
- **ZIP:** 30308
- **BUSINESS PHONE:** 4045065000

**MAIL ADDRESS:**
- **STREET 1:** 30 IVAN ALLEN JR. BLVD
- **CITY:** ATLANTA
- **STATE:** GA
- **ZIP:** 30308

### UNITED STATES
### SECURITIES AND EXCHANGE COMMISSION
**Washington, D.C. 20549**

## Notice of Effectiveness

**Date:** August 8, 2025

**Time:** 14:00:00

**Form Type:** S-3

---

**CIK:** 0001160661

**Company Name:** SOUTHERN POWER CO

**File Number:** 333-289172