MDU Resources Group Inc. announced that its indirect subsidiary, WBI Energy Transmission, Inc., has entered into an amendment to its existing Note Purchase and Private Shelf Agreement with PGIM, Inc. (Prudential) and other purchasers. The amendment, effective January 15, 2026, extends the period during which WBI may issue and sell additional senior unsecured notes, allowing for the issuance of up to $350 million in aggregate principal through December 22, 2028. Of this amount, $235 million has already been issued, leaving $115 million available. Proceeds from any new issuances are intended for general corporate purposes, including funding previously announced capital expenditures. The agreement includes customary covenants and default provisions.

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