secwatch.observer — SEC 8-K summary ====================================== Issuer: SOUTHERN POWER CO (—) CIK: 0001160661 Form: 8-K Filed at: 2026-06-04T14:49:32+00:00 Accession: 0001160661-26-000008 Event type: debt Sentiment: neutral Materiality: 0.50 Item codes: 8.01, 9.01 LLM model: deepseek-v4-flash:cloud@v2 Southern Power issues $600M 4.80% Senior Notes due 2031 ------------------------------------------------------- - $600M aggregate principal of 4.80% Senior Notes due June 15, 2031. - Notes issued under shelf registration statement (No. 333-289172). - Underwriting agreement dated June 1, 2026 with BMO, BofA, PNC, SMBC. - Third Supplemental Indenture dated June 4, 2026 governs the notes. - Proceeds for general corporate purposes (not specified in filing). Source: EDGAR index: https://www.sec.gov/Archives/edgar/data/1160661/000116066126000008/0001160661-26-000008-index.htm Primary doc: https://www.sec.gov/Archives/edgar/data/1160661/000116066126000008/so-20260601.htm HTML page: https://secwatch.observer/filing/0001160661-26-000008 License: Source filings: public domain (SEC EDGAR). Summaries (headline + bullets): CC-BY-4.0; attribute https://secwatch.observer