Symbols

SO

The Southern·NYSE

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SO Filings

2026-03-23 · Key Events

Form PRE 14A - Other preliminary proxy statements

2026-03-19 · Ownership

Form 144 - Report of proposed sale of securities

2026-03-19 · Ownership

Form 4 - Statement of changes in beneficial ownership of securities

2026-03-19 · Ownership

Form 4 - Statement of changes in beneficial ownership of securities

2026-03-19 · Key Events

Form 8-K - Current report

2026-03-18 · Ownership

Form 144 - Report of proposed sale of securities

2026-03-17 ·

Form 424B2 - Prospectus [Rule 424(b)(2)]

2026-03-16 ·

Form FWP - Filing under Securities Act Rules 163/433 of free writing prospectuses

2026-03-16 ·

Form 424B5 - Prospectus [Rule 424(b)(5)]

2026-03-10 · Ownership

Form 4 - Statement of changes in beneficial ownership of securities