{"filing":{"accession_number":"0001160661-26-000008","cik":"0001160661","ticker":null,"company_name":"SOUTHERN POWER CO","form":"8-K","filing_date":"2026-06-04","report_date":null,"primary_document":"so-20260601.htm","primary_document_url":"https://www.sec.gov/Archives/edgar/data/1160661/000116066126000008/so-20260601.htm"},"events":[{"id":6762,"run_id":5924,"accession_number":"0001160661-26-000008","anchor_item_number":"8.01","event_type":"other_material","event_domain":"catchall","is_material":true,"confidence":0.75,"summary":"Southern Power Company entered into an underwriting agreement on June 1, 2026 to issue $600 million in senior notes due 2031. While this is a material debt issuance that would affect investor assessment of the company's capital structure and financial position, it does not fit cleanly into the more specific event categories (it is not M\u0026A activity, a dilutive equity issuance, or a covenant breach). The disclosure is appropriately classified as other_material given its significance and the absence of a more precise taxonomy match.","company_name":"SOUTHERN POWER CO","ticker":null,"filing_date":"2026-06-04","form":"8-K","submitted_at":null,"items":[{"id":4278,"accession_number":"0001160661-26-000008","item_number":"8.01","item_title":null,"event_type":"other_material","event_domain":"catchall","is_material":true,"confidence":0.75,"reasoning":"Southern Power Company entered into an underwriting agreement on June 1, 2026 to issue $600 million in senior notes due 2031. While this is a material debt issuance that would affect investor assessment of the company's capital structure and financial position, it does not fit cleanly into the more specific event categories (it is not M\u0026A activity, a dilutive equity issuance, or a covenant breach). The disclosure is appropriately classified as other_material given its significance and the absence of a more precise taxonomy match.","classifier_version":"claude-haiku-4-5-20251001+prompt-9e0ffca5","taxonomy_version":"v1","classified_at":"2026-06-05T04:53:49.269316+00:00","company_name":"","ticker":null,"filing_date":""}]}],"classifications":[{"id":4278,"accession_number":"0001160661-26-000008","item_number":"8.01","item_title":null,"event_type":"other_material","event_domain":"catchall","is_material":true,"confidence":0.75,"reasoning":"Southern Power Company entered into an underwriting agreement on June 1, 2026 to issue $600 million in senior notes due 2031. While this is a material debt issuance that would affect investor assessment of the company's capital structure and financial position, it does not fit cleanly into the more specific event categories (it is not M\u0026A activity, a dilutive equity issuance, or a covenant breach). The disclosure is appropriately classified as other_material given its significance and the absence of a more precise taxonomy match.","classifier_version":"claude-haiku-4-5-20251001+prompt-9e0ffca5","taxonomy_version":"v1","classified_at":"2026-06-05T04:53:49.269316+00:00","company_name":"SOUTHERN POWER CO","ticker":null,"filing_date":"2026-06-04"}]}