SOUTHWESTERN ELECTRIC POWER CO Announces $750M 6.00% Senior Notes

What Happened SOUTHWESTERN ELECTRIC POWER CO announced in an 8-K that it entered into an Underwriting Agreement on September 14, 2026 to offer and sell $750,000,000 of its 6.00% Senior Notes, Series S, due 2037. The offering is being led by CIBC World Markets Corp., Fifth Third Securities, Inc., J.P. Morgan Securities LLC and U.S. Bancorp Investments, Inc. A Nineteenth Supplemental Indenture with The Bank of New York Mellon Trust Company, N.A., as Trustee, establishing the terms of the notes was dated September 16, 2026.

Key Details

• Amount: $750,000,000 aggregate principal of Senior Notes, Series S.
• Coupon and maturity: 6.00% interest, due 2037.
• Underwriting agreement dated September 14, 2026; supplemental indenture dated September 16, 2026.
• Trustees, form of the notes and legal opinion were filed as exhibits with the 8-K.

Why It Matters This filing shows the company is raising long‑term debt by issuing fixed‑rate senior notes, which will increase its outstanding debt and future interest obligations at a 6.00% coupon through 2037. Investors should note the size, interest rate and maturity when assessing Southwestern Electric Power Co.'s capital structure and interest expense outlook. The 8‑K does not disclose the intended use of proceeds.