Origin's chief financial officer, Frank Calabria, said the issue diversifies the company's source of funding as well lengthening its debt maturity profile.

"The transaction provides long-term certainty of debt financing without any increase in financing margins compared to Origin's existing domestic medium-term financing facilities," Calabria said.

Joint lead arrangers to the issue were Bank of America Securities and Westpac Institutional Bank. Origin is currently rated by Fitch Ratings as A-/Stable and by Standard & Poors as BBB+/Stable.