Public Service Company of Oklahoma Issues $1.0B Senior Notes Due 2034 & 2056

What Happened
Public Service Company of Oklahoma filed an 8‑K (Aug 14, 2026) announcing the offering and sale of $1.0 billion of senior notes: $450 million of 5.40% Senior Notes, Series O, due 2034, and $550 million of 6.30% Senior Notes, Series P, due 2056. The offering was sold through underwriters led by BMO Capital Markets, KeyBanc Capital Markets and SMBC Nikko Securities America. The filing includes an underwriting agreement (Aug 12, 2026) and a supplemental indenture establishing the notes’ terms.

Key Details

• Total principal: $1,000,000,000 (two series: $450M and $550M).
• Coupon rates: 5.40% (Series O, due 2034) and 6.30% (Series P, due 2056).
• Filing and signature: Form 8‑K filed Aug 14, 2026, signed by David C. House, Assistant Secretary.
• Representatives of the underwriters: BMO Capital Markets Corp., KeyBanc Capital Markets Inc., SMBC Nikko Securities America, Inc.

Why It Matters
This transaction raises $1.0 billion of long‑term debt, which will affect the company’s capital structure and future interest expense (blended coupon ≈ 5.90%). The two maturities extend the company’s debt profile to 2034 and 2056, giving it long‑dated funding. The 8‑K does not specify use of proceeds; investors should watch subsequent disclosures for whether proceeds are used for refinancing, capital projects, or general corporate purposes and monitor leverage and interest coverage metrics.