Duke Energy Progress closes $1 billion first mortgage bond sale

Duke Energy Progress, LLC consummated the issuance and sale of $1 billion of first mortgage bonds on September 11, 2026, according to its Form 8-K filed that day. The financing comprises $700 million of its 5.55% Series due 2036 and $300 million of its 6.15% Series due 2056, completing a transaction under an underwriting agreement dated September 8.

A completed financing

Duke Energy Progress reported a completed issuance and sale, making the September 11 closing the central development in this filing. The $1 billion total combines two series of first mortgage bonds with different coupons and maturity years. The larger series carries a 5.55% coupon and matures in 2036; the smaller series carries a 6.15% coupon and matures in 2056. Those are the principal amounts and series terms disclosed in Item 8.01.

The timing matters because this is a consummated financing rather than an announcement of an anticipated transaction. The underwriting agreement was dated September 8, three days before the reported completion. September 11 is both the date of the completed issuance and sale and the earliest event date identified in the Form 8-K. The filing therefore establishes that the issuer had completed this borrowing transaction as of Friday, September 11.

Two series, one billion dollars of principal

The $700 million series accounts for 70% of the combined principal, while the $300 million series accounts for the remaining 30%. These proportions are arithmetic based on the disclosed amounts. They show that most of the principal sits in the 2036 series, with a smaller portion in bonds maturing twenty calendar years later. The 2056 series has a coupon 0.60 percentage points above the 2036 series. That comparison describes the two stated coupons; it does not establish either series' yield or the issuer's total financing cost.

Item 8.01 says the mortgage bonds were sold to the underwriters at discounts to their principal amounts. Its prose does not give numeric discounts. Accordingly, the $1 billion figure describes aggregate principal issued, and it should not be read as a disclosed net cash receipt. The locked record does not establish net proceeds or a use of proceeds, so this report does not assign the financing to a particular investment, repayment or other spending purpose.

The legal issuer is Duke Energy Progress, LLC, a North Carolina operating utility subsidiary in the Duke Energy Corporation family. The parent ticker, DUK, provides the Company File linkage for this story. It does not change the identity of the borrower: these are Duke Energy Progress first mortgage bonds. The supplied record does not establish a parent guarantee, and no such guarantee is assumed here.

The mortgage documents behind the issuance

The bonds were issued under a Mortgage and Deed of Trust dated as of May 1, 1940, as supplemented over time. The latest supplement identified for this transaction is the Ninety-seventh Supplemental Indenture, dated as of September 1, 2026, among the company and the mortgage trustees. That document relates to the two mortgage bond series and is included as Exhibit 4.1 with the forms of global bonds.

The Bank of New York Mellon, formerly Irving Trust Company, serves as the corporate trustee. Barbara Zsombori, successor to Frederick G. Herbst, is the other named trustee. These details identify the legal framework under which the bonds were issued. They do not, by themselves, provide a credit rating or establish the extent of any investor recovery in a hypothetical default. Neither a rating nor a recovery estimate is supported by the locked facts.

Underwriting and registration record

Item 8.01 names six representatives of the underwriters: BNY Mellon Capital Markets, LLC; MUFG Securities Americas Inc.; PNC Capital Markets LLC; Scotia Capital (USA) Inc.; SMBC Nikko Securities America, Inc.; and U.S. Bancorp Investments, Inc. The filing describes them as representatives of the several underwriters named in the agreement. The list should therefore be understood as the disclosed representatives, rather than an assertion that these were the only syndicate participants.

The September 8 underwriting agreement is Exhibit 99.1. Alongside the mortgage documentation, the filing includes Exhibit 5.1, a legal opinion regarding the validity of the mortgage bonds. The opinion was filed for incorporation into Duke Energy Progress's Registration Statement on Form S-3, No. 333-290475-01. Together, these exhibits connect the completed sale to its underwriting agreement, governing mortgage supplement and registration documentation.

For readers tracking the utility's financing, the confirmed result is specific: Duke Energy Progress completed $1 billion of first mortgage bond issuance across the two disclosed series. The filing supplies the closing date, principal, coupons, maturity years and transaction documents. The remaining questions concern economics and purpose beyond those facts, including net proceeds and intended use. This report makes no claim about a stock-price response, a trading venue or how these coupons compare with prior Duke Energy Progress borrowings.

Filing reference

Duke Energy Progress, LLC disclosed the consummated issuance in Form 8-K AccNo 0001104659-26-107068 (Items 8.01 and 9.01; Acceptance-Datetime 20260911161637).