Northern Dynasty Files Amended Technical Report

Northern Dynasty Files Amended Technical Report

June 9, 2023 VANCOUVER – Northern Dynasty Minerals Ltd. (TSX: NDM; NYSE American: NAK) ("Northern

Dynasty" or the "Company") announces that it has filed a n Amended Technical Report, effective date May 19,

2023 (the “Technical Report”) under National instrument 43 -101 for the Pebble Project. The Technical Report

amends the technical report filed on March 31, 2023 in order to address comments received from the BC Securities

Commission. The changes include:

• Removal of contained metal from the resource estimate table;

• Additional disclosure on the cutoff grade and reasonable prospects for eventual economic extraction;

• Clarifications of some exploration information and additional drill sections;

• Removal of information on the Project Description; and

• Additional information in the certificates of the qualified persons and consents.

While no new technical information was incorporated in the resource estimate, the effective date was moved to

May 19 to incorporate the latest updates to the permit status. The estimated mineral resources remain unchanged

from the report filed on March 31.

For further details on Northern Dynasty and the Pebble Project, please visit the Company's website at

www.northerndynastyminerals.com or contact Investor services at (604) 684-6365 or within North America at 1-

800-667-2114. Review public filing s, which include forward looking information cautionary language and risk

factor disclosure regarding the Company and the Pebble Project in Canada at www.sedar.com and the US at

www.sec.gov.

Stephen Hodgson, P.Eng, and David Gaunt, qualified persons who are not independent of Northern Dynasty have

approved the technical information contained in this news release.

Trevor Thomas

Secretary and General Counsel