X0708 D/A LIVE 0001475711 NHIT: Long Duration Corporate Bond Trust ONE FINANCIAL CENTER BOSTON MA MASSACHUSETTS 02111 800-343-2029 NEW HAMPSHIRE Loomis Sayles Long Duration Corporate Bond Trust Loomis Sayles High Grade Long Duration Corporate Bond Trust Business Trust true N/A Loomis Sayles Trust Company, LLC One Financial Center Boston MA MASSACHUSETTS 02111 Executive Officer Trustee Investing Decline to Disclose 06b true 0001475711-25-000003 2009-10-15 true true Units of Participation false 5000000 Indefinite 217399499 Indefinite false 9 0 true 0 true 0 true false NHIT: Long Duration Corporate Bond Trust Lori A. Sanderson Lori A. Sanderson Authorized Signer 2026-11-02