Southern Power issues $600M 4.80% Senior Notes due 2031

SOUTHERN POWER CO

$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).

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